Merge pull request 'docs(changelog): add the custom snooze duration entry (#40)' (!74) from docs/changelog-snooze into release/v2.15.0

Reviewed-on: #74

.gitea/ISSUE_TEMPLATE/crash_report.md

@@ -5,6 +5,7 @@ title: "Crash: "
 labels:
   - bug
   - crash
+  - priority:high
 ---
 
 <!--

.gitea/ISSUE_TEMPLATE/feature_request.md

@@ -3,7 +3,7 @@ name: Feature request
 about: Suggest an idea or improvement
 title: ""
 labels:
-  - enhancement
+  - feat
 ---
 
 ### What would you like Calendula to do?

.gitea/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,19 @@
+---
+name: Question
+about: Ask how something works or get help using Calendula
+title: ""
+labels:
+  - question
+---
+
+### Your question
+
+
+### What you've tried
+<!-- so far, if anything -->
+
+
+### Context
+- Calendula version: <!-- Settings → bottom of the screen -->
+- Android version:
+- Device:

.gitea/workflows/ci.yaml

@@ -29,6 +29,13 @@ jobs:
         with:
           # Full history so the base..HEAD diff below has a merge-base.
           fetch-depth: 0
+          submodules: recursive
+
+      # Cheap, always-on guard: the release build must stay reproducible for the
+      # official F-Droid repo (no AGP VCS-info embedding). Runs regardless of
+      # change scope so a regression can't slip through on a "docs-only" PR.
+      - name: Reproducible-release invariant
+        run: bash scripts/check_reproducible_release.sh
 
       # Decide whether anything that affects the app build changed. Docs,
       # F-Droid metadata and the licence don't, so those PRs skip the SDK +

.gitea/workflows/release.yaml

@@ -33,6 +33,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          submodules: recursive
 
       - name: Resolve version and whether it is a new release
         id: v
@@ -82,6 +84,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          submodules: recursive
 
       - name: Setup Java
         uses: actions/setup-java@v4

.gitea/workflows/translations.yaml

@@ -3,13 +3,15 @@ name: Translations
 # Fast, SDK-free parity check for translation resources, so Weblate PRs (which
 # only touch values-*/strings.xml) get quick feedback without the full Android
 # build. The deeper checks still run in CI via lintDebug (ExtraTranslation).
+#
+# Runs on every PR (no path filter) so the required "Translations / check"
+# status is always reported — like the `ci` job. A path-filtered workflow is
+# skipped on unrelated PRs and never posts its status, which leaves that
+# required check pending forever and blocks the merge of any code-only PR into a
+# release/* branch. The check itself is cheap and simply passes when the
+# committed translations are consistent, so always running it costs nothing.
 on:
   pull_request:
-    paths:
-      - 'app/src/main/res/values*/strings.xml'
-      - 'app/src/main/res/xml/locales_config.xml'
-      - 'scripts/check_translations.py'
-      - '.gitea/workflows/translations.yaml'
 
 concurrency:
   group: translations-${{ github.ref }}

.gitignore

@@ -55,3 +55,6 @@ Thumbs.db
 
 # KSP
 .ksp/
+
+# Claude Code
+/CLAUDE.md

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "floret-kit"]
+	path = floret-kit
+	url = https://gitea.jeanlucmakiola.de/makiolaj/floret-kit.git

.planning/ROADMAP.md

@@ -230,44 +230,59 @@ pass on the existing controls; new toggles ride in with their own features.
 
 **Tier 3 — platform reach (depends on Tier 2)**
 7. ~~Home-screen widget — built on the agenda data source from #6~~ *(done, v2.5.0 — agenda + month widgets)*
-8. App shortcuts: ~~launcher long-press → New event~~ *(done, v2.5.0)*; optional quick-settings tile still open
+8. App shortcuts: ~~launcher long-press → New event~~ *(done, v2.5.0)*; ~~quick-settings tile~~ *(done, v2.8.0 — "New event" QS tile)*
 
 **Tier 4 — reliability, data-safety & interop** *(re-ranked 2026-06-17)*
 9. **Reminders — defaults + delivery reliability** *(shipped v2.6.0)* — global
    default reminder **+ per-calendar override**, bundled with battery-exemption
    hardening. Full sketch in "Reminders — defaults & delivery reliability" below.
-10. **The `.ics` engine — export + import** *(in progress → v2.7)* — one
+10. **The `.ics` engine — export + import** *(shipped v2.7.0, 2026-06-18)* — one
     hand-rolled serializer/parser (zero deps, stays on `kotlinx-datetime`),
-    four surfaces: single-event share + whole-calendar backup (export),
-    open-`.ics`→form + whole-calendar restore (import). Closes the
-    device-local-calendar data-loss gap (#10/#11 merged here). Built as **two
-    sequential branches in one release**: `feat/ics-export` (write side +
-    UID-on-create precursor) then `feat/ics-import` (parser, restore, dedup).
-    Import is liberal-in/strict-out: skip-and-report foreign `VTIMEZONE` /
-    `RECURRENCE-ID` it can't model. Timezone rule: all-day `VALUE=DATE`,
-    non-recurring timed UTC `Z`, recurring timed `TZID`-labelled from the stored
-    `EVENT_TIMEZONE` (no `VTIMEZONE` blocks; resolved against the OS tz DB on
-    import). Plan: `docs/superpowers/plans/2026-06-18-05-ics-export.md`.
-11. **Snooze / dismiss notification actions** *(next, after v2.7)* — follows the
-    `.ics` work; inherits v2.6's deferred exact-alarm/WorkManager decision (snooze
-    must re-fire an alarm).
-12. Drag & drop rescheduling in day/week — big-ticket, own slice (recurring drops reuse the scope dialog)
+    four surfaces all shipped: single-event share + whole-calendar backup
+    (export), open-`.ics`→form + whole-calendar bulk import (import). Closed the
+    device-local-calendar data-loss gap (#10/#11 merged here). Built as two
+    sequential branches: `feat/ics-export` (write side + UID-on-create precursor)
+    then `feat/ics-import` (parser, restore, dedup by UID). Import is
+    liberal-in/strict-out: skip-and-report foreign `VTIMEZONE` / `RECURRENCE-ID`
+    / guest lists it can't model. Plans:
+    `docs/superpowers/plans/2026-06-18-05-ics-export.md` + `…-06-ics-import.md`.
+11. **Snooze / dismiss notification actions** *(merged into release/v2.8.0)* —
+    followed the `.ics` work; inherits v2.6's deferred exact-alarm/WorkManager
+    decision (snooze must re-fire an alarm).
+
+**Tier 5 — close the read/write gap on the event model** *(opened 2026-06-22)*
+12. **Attendee editing** *(shipped — merged into release/v2.8.0, `feat/attendee-editing`
+    MR !29 / commit `b0f34ff`, 2026-06-22)* — closed the last big read-only gap in
+    the event model: attendees were already *read* (queried, mapped, shown on the
+    detail screen since v0.6) and are now *writable* from the form. An attendees
+    section on `EventEditScreen` / `EventForm` adds by typed email **or** the
+    no-permission contact picker, edits/removes rows, and sets role (required /
+    optional) — writing `CalendarContract.Attendees` rows on insert + dirty-checked
+    update, mirroring the reminders-diff pattern. The sync-adapter *invitation*
+    caveat was **settled record-only** (Calendula never sends invites; the backend
+    decides delivery) — full sketch + decision in "Attendee editing" under Locations
+    & People below.
 
 **Gated — explicit go/no-go before any work (mostly INTERNET-permission calls)**
 - Remote calendar create/edit (re-implements DAVx5; INTERNET + credential storage)
-- Locations & People — contact address picker (no-permission, one-shot) is the safe entry; OSM autocomplete needs INTERNET
+- Locations & People — the no-permission contact pickers already shipped (location v2.8.0, attendee email v2.8.0); what remains gated is OSM autocomplete (needs INTERNET)
 - Move event to another calendar — sync-adapter minefield (copy+delete model)
 
 **Bottom — deprioritised, not important**
 - Duplicate event (detail action → prefilled create form) — moved here
   2026-06-17; cheap but low value, pick up only if asked
 
-**Unranked / fill-in** — pinch-to-zoom time scale, tablet/foldable layouts,
-full-text search, ICS file import. Pulled in opportunistically, not sequenced.
+**Unranked / fill-in** — pinch-to-zoom time scale, tablet/foldable layouts.
+Pulled in opportunistically, not sequenced.
 
-Debatable calls worth a second look: whether **local-calendar backup (#10)**
-should lead Tier 4 outright (it's a silent data-loss risk, not a feature);
-whether drag-drop (#12) jumps ahead given its daily-driver impact.
+Tier 4 is now fully shipped (#9 reminders defaults v2.6.0, #10 `.ics`
+export/import v2.7.0, #11 snooze/dismiss in release/v2.8.0; drag-drop rejected),
+and Tier 5 #12 — attendee editing — shipped in release/v2.8.0, closing the last
+read-only gap in the event model. v2.8.0 also cleared most Tier 2/3 leftovers —
+full-text search, the "New event" Quick Settings tile, and the now-line all
+shipped there. **No tier work is currently committed as next;** the remaining
+candidates are unscheduled theme-group ideas (pinch-to-zoom, tablet/foldable,
+accessibility pass) plus the gated go/no-go items.
 
 ## Navigation & views
 
@@ -277,26 +292,22 @@ whether drag-drop (#12) jumps ahead given its daily-driver impact.
 - Agenda view (fourth view: upcoming events grouped by day; also the
   natural data source for a future widget)
 - Jump to date — drawer date picker (un-cut from V1)
-- Current-time "now" line in day/week — standard in every calendar, cheap,
-  currently absent. Daily-driver polish.
-- Week numbers in the **month** grid — week view already shows the badge
-  (`WeekNumberBadge`, `WeekScreen.kt`); extend to month for ISO/European users.
+- ~~Current-time "now" line in day/week~~ **shipped v2.8.0**
+- Week numbers in the **month** grid — **rejected** (owner decision): clutters
+  the view and shrinks the day cells; the badge stays week-view-only.
 - Pinch-to-zoom time scale in day/week
 - Tablet / foldable layouts *(was v3.0)*
-- Full-text search *(was v3.0)* — promote out of "fill-in": for a daily driver
-  with real event history, finding an event is core completeness, not optional.
+- ~~Full-text search~~ **shipped v2.8.0** — for a daily driver with real event
+  history, finding an event is core completeness, not optional.
 
 ## Event editing & creation
 
-- Drag & drop rescheduling in day/week (recurring drops reuse the scope
-  dialog) — big-ticket, own slice
 - Duplicate event (detail action → prefilled create form)
-- **Per-event color** (`Events.EVENT_COLOR`, OptionCard picker in the form)
-  *(next)* — chosen to follow the in-progress tap-to-create + calendar
-  management work: reuses the color-picker component and palette plumbing
-  being built for local calendar management, and finishes the create/edit
-  theme. `EVENT_COLOR` / `EVENT_COLOR_KEY` from the calendar's color list
-  (`Colors` table, `TYPE_EVENT`); falls back to the calendar color when unset.
+- ~~**Per-event color**~~ *(shipped v2.4.0)* — `EVENT_COLOR` / `EVENT_COLOR_KEY`
+  from the calendar's color list (`Colors` table, `TYPE_EVENT`), OptionCard
+  picker in the form, falling back to the calendar color when unset. Reused the
+  color-picker component and palette plumbing from local calendar management and
+  finished the create/edit theme.
 
 ## Calendars & accounts
 
@@ -319,15 +330,69 @@ whether drag-drop (#12) jumps ahead given its daily-driver impact.
   go/no-go gate as the OSM/INTERNET item below.
 - Move event to another calendar (copy+delete model with a consequences
   warning — deferred from v2.0; `CALENDAR_ID` is sync-adapter-owned) *(was v3.0)*
-- **Local-calendar backup / export** *(Tier 4 #10)* — device-only
-  (`ACCOUNT_TYPE_LOCAL`) calendars are first-class in Calendula but have **no
-  sync and therefore no backup**: a lost/wiped phone destroys them permanently.
-  Whole-calendar `.ics` (VCALENDAR) export to a user-chosen file (SAF), plus
-  restore-on-import that recreates events into a chosen local calendar. Reuses
-  the .ics serializer from the single-event share work; the restore path reuses
-  the import parser. A data-integrity obligation, not a feature.
+- ~~**Local-calendar backup / export** *(Tier 4 #10)*~~ **shipped v2.7.0** —
+  device-only (`ACCOUNT_TYPE_LOCAL`) calendars had no sync and therefore no
+  backup. Settings → Calendars → Export writes every event to a user-chosen
+  `.ics` file (SAF); restore is the bulk-import path (pick a calendar, dedup by
+  UID). Closed the silent data-loss gap.
 
-## Reminders — defaults & delivery reliability *(implemented 2026-06-17, `feat/default-reminders` — pending on-device review)*
+### Disable a calendar in-app *(captured 2026-06-25)*
+
+A second, heavier visibility level **above** the existing per-view filter. Today
+the drawer's calendar filter (`hiddenCalendarIds` in `CalendarPrefs`) only hides
+a calendar's *events* from the month/week/day/agenda views — the calendar itself
+still clutters the drawer filter list, the event-form calendar picker, and the
+import target picker. "Disable" removes a calendar from the app's surfaces
+entirely; "hide" stays the lightweight, frequently-toggled control.
+
+**Two-level model (both kept):**
+- **Hidden** (existing) — `hiddenCalendarIds`; a quick per-view checkbox in the
+  drawer. Toggles events on/off in the views; the calendar stays listed
+  everywhere. Operates only over the *enabled* calendars.
+- **Disabled** (new) — the calendar is gone from the app: not in the drawer
+  filter list, not in the event-form picker, not in the import picker, and its
+  events never appear (it's gated out of `instances()` like a hidden one). It
+  remains visible **only** in Settings → Calendars, where the enable/disable
+  toggle lives, so it can be brought back.
+
+**Storage — app-side (DataStore), mirrors the hidden set.** Add
+`disabledCalendarIds: Set<Long>` + `setDisabledCalendarIds(...)` to
+`CalendarPrefs` (comma-separated string key, same shape as `hiddenCalendarIds`).
+**Does not touch** `CalendarContract.Calendars.VISIBLE` / `SYNC_EVENTS` — purely
+a Calendula-local preference, so other calendar apps are unaffected and the sync
+adapters stay out of it (privacy-clean, reversible).
+
+**Where the disabled set is applied:**
+- `CalendarRepositoryImpl.instances()` + `searchEvents()` — exclude
+  `calendarId ∈ (hidden ∪ disabled)` so a disabled calendar's events never show
+  and aren't searchable. (`repository.calendars()` itself stays unfiltered/raw —
+  the screens that need everything still get everything.)
+- `FilterViewModel.state` — drop disabled calendars from the drawer filter list
+  (you can't hide/show what's disabled).
+- `EventEditViewModel.writableCalendars` — exclude disabled, so you can't create
+  into a calendar you've removed from the app. Handle the last-used-calendar
+  preselect falling on a now-disabled calendar (fall back to first enabled
+  writable).
+- `ImportViewModel` — exclude disabled from the import target list.
+- `CalendarsScreen` / `CalendarsViewModel` — the **only** surface that lists
+  disabled calendars; add `setDisabled(id, Boolean)` and a per-calendar toggle.
+
+**UI — Settings → Calendars (no new tab).** Add an enable/disable control to each
+row on the existing `CalendarsScreen` (both the local and the synced/read-only
+groups — disabling is an app-side view choice, independent of write access).
+Disabled rows render visibly de-emphasised (dimmed) but keep the toggle so
+they're re-enableable. Follow the project dialog/list conventions (M3 grouped
+list, `option-card-modal-style-default` if a confirm/selection surface is needed).
+
+**Decided behaviour:**
+- All calendars disabled → views show the existing empty state.
+- A disabled calendar that still holds events: events simply vanish from
+  views/search until re-enabled (no data touched — it's a filter, not a delete).
+- Deep links / notifications pointing at an event in a disabled calendar still
+  open its detail screen — detail is a direct id lookup, not an `instances()`
+  query, so disabling never strands an existing link.
+
+## Reminders — defaults & delivery reliability *(shipped v2.6.0; built on `feat/default-reminders`)*
 
 Two themes bundled because both are "make reminders trustworthy" — the core of
 the "Calendula is your only calendar app" promise.
@@ -404,30 +469,34 @@ it directly undermines the feature's premise, so it rides in here.
   settings so users can verify delivery on their specific OEM (Samsung / Xiaomi
   are notorious for suppressing it).
 
-### Open decisions (resolve before building)
+### Decisions made (as shipped in v2.6.0)
 
-1. Self-schedule via `AlarmManager` vs trust the provider broadcast
-   (reliability vs simplicity + battery cost).
-2. All-day reminder representation (minutes-before vs absolute time-of-day).
-3. Where per-calendar overrides live in the UI (rows on the Calendars screen vs
-   a list inside the Notifications sub-page).
+1. **Provider broadcast kept** — did not self-schedule via `AlarmManager`; the
+   battery-optimisation exemption is the reliability lever (simplicity + battery
+   cost won over the exact-alarm subsystem).
+2. **All-day reminders = minutes-before-midnight** (day-scale presets); absolute
+   time-of-day ("9am the day before") deferred — see the deferred list above.
+3. **Per-calendar overrides live in the Notifications sub-page** (override list),
+   governing timed events only.
 
-### Later (round two)
+### Round two
 
-- Snooze + dismiss actions on the notification (snooze needs an
-  exact-alarm / WorkManager decision) — Tier 4 #13.
+- ~~Snooze + dismiss actions on the notification~~ *(shipped in release/v2.8.0,
+  Tier 4 #11)* — snooze re-fires a snooze-only exact alarm.
 
 ## Sharing & interop
 
-- Share event as .ics + open/receive .ics into a prefilled create form
-  (front-runs the import below)
-- ICS file import (drag-and-drop) *(was v3.0, optional)*
+- ~~Share event as .ics + open/receive .ics into a prefilled create form~~
+  **shipped v2.7.0** — single-event share from detail; opening an `.ics` with one
+  event prefills the create form, many events opens a bulk import (dedup by UID)
+- ~~ICS file import~~ **shipped v2.7.0** — covered by the open/receive `.ics`
+  flow above (single → form, many → bulk import)
 
 ## Platform & launchers
 
 - ~~Home-screen widget~~ **shipped v2.5.0** — agenda + month widgets
-- ~~App shortcuts (launcher long-press → New event)~~ **shipped v2.5.0** —
-  optional quick-settings tile still open
+- ~~App shortcuts (launcher long-press → New event)~~ **shipped v2.5.0**
+- ~~"New event" Quick Settings tile~~ **shipped v2.8.0**
 
 ## Quality & reliability
 
@@ -443,9 +512,10 @@ it directly undermines the feature's premise, so it rides in here.
 Beyond classic calendar-client scope; discussed, deliberately not planned
 in detail yet:
 
-- **Contact address picker** for the location field via the system picker
-  (`ACTION_PICK` on postal addresses) — one-shot, needs no READ_CONTACTS,
-  fits the privacy story. Same mechanism later for picking emails.
+- ~~**Contact address picker** for the location field via the system picker
+  (`ACTION_PICK`)~~ **shipped v2.8.0** — one-shot, needs no READ_CONTACTS, fits
+  the privacy story. The same no-permission mechanism was then reused for the
+  attendee email picker (v2.8.0).
 - **OSM address autocomplete** in the location field (type "Brandenburger
   Tor" → tap suggestion → resolved address inserted). Backend would be
   Photon (Nominatim's public policy forbids autocomplete). **Requires the
@@ -455,9 +525,57 @@ in detail yet:
   trade-off is an explicit go/no-go decision before any work starts.
 - **Inline contact suggestions** while typing (needs READ_CONTACTS) — only
   if the picker proves clunky.
-- **Attendee editing / invites from contacts** — own milestone; writing
-  `Attendees` rows touches sync-adapter invitation behavior (Google vs
-  DAVx5 differ).
+- **Attendee editing** *(promoted out of this gated bucket 2026-06-22 — now
+  Tier 5 #12, high-importance; the no-permission typed-email path is not an
+  INTERNET/contacts call)*. See the "Attendee editing" sketch below.
+
+### Attendee editing *(Tier 5 #12, opened 2026-06-22)*
+
+The last read-only gap in the event model: attendees are read & shown on the
+detail screen (since v0.6) but the form can't write them. Make guests editable.
+
+- **Read side already done:** `Attendee` domain model + status/relationship/type
+  enums, `queryAttendees` + `EventDetailMapper.toAttendee` (with tests), and the
+  attendees `DetailCard` + `AttendeeRow` in `EventDetailScreen`. Nothing to add
+  there.
+- **Write side — SHIPPED (`feat/attendee-editing`, commit b0f34ff, 2026-06-22):**
+  `attendees` on `EventForm`; a Guests section in `EventEditScreen` rendered as an
+  inline grouped list — each guest a tonal card (avatar, name/email, tappable
+  Required/Optional role chip, remove), the trailing card an inline email field
+  (type → Done commits). Persisted by `reconcileAttendees` diffing the provider's
+  `CalendarContract.Attendees` rows on insert + dirty-checked update (new guests =
+  `RELATIONSHIP_ATTENDEE` / `STATUS_INVITED`; kept rows keep their status, only the
+  required/optional type updates; organizer/resource/no-email rows untouched).
+  Reminders restyled to the same grouped-list pattern in passing. Needs only the
+  existing `WRITE_CALENDAR` — no new permission.
+- **Name on manual add — SHIPPED via a contact picker** (2026-06-22). The inline
+  field is email-only (the quick path); the add row also has a **"from contacts"
+  button**: `ACTION_PICK` on `ContactsContract.CommonDataKinds.Email.CONTENT_URI` →
+  the system Contacts app returns a URI to the picked email row, queried for
+  `Email.ADDRESS` **and** the contact `DISPLAY_NAME`, so a picked guest gets both
+  email and name in one tap. The result Intent grants temporary read access, so
+  **no `READ_CONTACTS` permission** — one-shot and user-driven, same no-permission
+  mechanism as the location address picker above. Self/organizer rows stay
+  non-editable.
+- **Invitation behavior — DECIDED 2026-06-22: record-only, all writable
+  calendars.** Calendula has no INTERNET and never sends an invitation itself; it
+  only writes `Attendees` rows. Whether a guest is notified is decided downstream:
+  local calendars notify no one (no sync); CalDAV/DAVx5 PUTs the `ATTENDEE` lines
+  and the *server* decides iMIP delivery; Google's sync adapter pushes the change
+  and Google decides (third-party attendee writes are historically unreliable
+  there). Editing is allowed on **any writable calendar** — not gated to local.
+  - **Honest, backend-aware copy is mandatory** (this is the whole point of the
+    decision): on a synced calendar show "Calendula doesn't send invitations —
+    your calendar account may email guests when it syncs"; on a local calendar
+    show "Stored on this device. No one is notified."
+  - Calendula must **not fabricate an ORGANIZER** or otherwise fake scheduling
+    state to coax a send — it writes the guest list faithfully and leaves
+    scheduling entirely to the backend.
+  - The optional "send an .ics invite via your email app" delegate (`ACTION_SEND`,
+    still no INTERNET) was considered and **deferred** — revisit only if users ask
+    to notify guests explicitly.
+- **Out of scope (for now):** RSVP/your-own-response editing, free/busy lookups,
+  resource booking — all carry server round-trips or richer sync semantics.
 
 ## Consciously rejected
 
@@ -465,3 +583,5 @@ in detail yet:
 - Natural-language quick entry (high effort, locale-fragile; the prefilled
   form already covers fast entry)
 - Quick-add sheet (the prefilled full form already covers it — cut in v2.0)
+- Drag & drop rescheduling in day/week — **rejected** (owner decision,
+  reaffirmed 2026-06-22): not wanted. Rescheduling stays via the edit form.

.planning/STATE.md

@@ -1,17 +1,27 @@
 # Calendula — Current State
 
-*Last updated: 2026-06-17*
+*Last updated: 2026-06-22*
 
 ## Status
 
-**Milestone:** 2 (write support) **complete** — v2.0.0 shipped 2026-06-11;
-v2.1.0 (month event grid, drawer view tabs, cursor fix) shipped 2026-06-15.
-**Phase:** post-2.1 backlog work. v2.2.0 (tap-to-create in day/week + local
-calendar management) and v2.3.0 (Material 3 grouped-list redesign of Settings,
-the calendar manager and the navigation drawer) both shipped 2026-06-16;
-v2.4.0 (per-event colors) and v2.5.0 (jump-to-date, Agenda view, home-screen
-agenda + month widgets, and a "New event" launcher shortcut) shipped
-2026-06-17. The backlog is now organised by theme in `ROADMAP.md`.
+**Milestone:** 2 (write support) **complete** — v2.0.0 shipped 2026-06-11.
+**Phase:** post-2.x theme-based backlog work (organised in `ROADMAP.md`).
+**Latest released tag: v2.7.5.** The whole Tier 4 (reliability/data-safety/
+interop) arc is now done or in flight:
+- v2.4.0 per-event colors (2026-06-17)
+- v2.5.0 jump-to-date, Agenda view, agenda + month home-screen widgets, "New
+  event" launcher shortcut (2026-06-17)
+- v2.6.0 default reminders (global + per-calendar override, all-day default,
+  battery-exemption row) + system per-app language (2026-06-18)
+- v2.7.0 **`.ics` engine** — single-event share, local-calendar backup export,
+  open/receive `.ics` (single → form, many → bulk import, dedup by UID)
+  (2026-06-18)
+- v2.7.1–v2.7.5 — crash-reporting + F-Droid reproducible-build hardening + fixes
+
+**Next release `release/v2.8.0` (integration branch, not yet cut to main):**
+holds crash reports via the public Codeberg tracker (MR !27) + reminder
+snooze/dismiss notification actions (MR !28). Version bump to 2.8.0 happens at
+release-cut.
 
 ## Progress
 
@@ -120,11 +130,48 @@ agenda + month widgets, and a "New event" launcher shortcut) shipped
   sync" warning on the picker and in Settings. Color writes flow through
   insert / dirty-checked update / occurrence-exception; mapper + form tests.
 
+- [x] v2.5 (shipped 2026-06-17) — Agenda view (4th top-level view),
+  jump-to-date drawer date picker, two home-screen widgets (scrolling
+  "Upcoming" agenda + month grid), and a "New event" launcher long-press
+  shortcut
+
+- [x] v2.6 (shipped 2026-06-18) — default reminders: global timed default +
+  separate all-day default + per-calendar override (timed), applied on create
+  with dirty-flag handling; three pickers + override list in Settings →
+  Notifications; battery-optimisation exemption row (status + system deep-link,
+  no new permission). Plus system per-app language (Android 13+) and an
+  immediate-effect fix for the in-app language picker
+
+- [x] v2.7 (shipped 2026-06-18) — the `.ics` engine: share a single event as
+  `.ics` from the detail screen; back up local calendars (Settings → Calendars
+  → Export) to a SAF file; open/receive an `.ics` — one event prefills the
+  create form, many events open a bulk import into a chosen calendar (dedup by
+  UID, skip-and-report unrepresentable VTIMEZONE / RECURRENCE-ID / guests).
+  Hand-rolled serializer/parser, zero deps. Plus all-day single-day UTC fix and
+  a widget R8 keep-rule crash fix
+
+- [x] v2.7.1–v2.7.5 (2026-06-21) — launch crash fix (listener before grant),
+  user-controlled crash reporting, widget loading-spinner R8 keep rule, and
+  F-Droid reproducible-build cleanups for the official repo
+
+- [~] release/v2.8.0 (not yet cut) — crash reports via the public Codeberg
+  tracker (MR !27) + reminder snooze/dismiss notification actions (MR !28,
+  snooze self-schedules an exact alarm; primary delivery stays provider-broadcast)
+
 ## Next
 
-1. Monitor the F-Droid build/publish for the v2.4.0 tag
-2. Decide the "Locations & People" and "remote calendar create/edit"
-   go/no-go calls (both hinge on the INTERNET permission) — see `ROADMAP.md`
-3. **Duplicate event** and **jump-to-date** are the cheap follow-ups; then
-   agenda view (strategic, backs a future widget). Full ranked sequence in
-   `ROADMAP.md` → "Near-term sequence".
+1. Cut **v2.8.0** from `release/v2.8.0` (bump versionName → tag via the
+   merge-driven pipeline) once on-device review signs off
+2. **Attendee editing** — the committed next feature (Tier 5 #12, high-
+   importance, opened 2026-06-22). Attendees are already read & shown on the
+   detail screen since v0.6; the gap is the write side — make guests editable
+   in `EventEditScreen` / `EventForm` (add by typed email, role, remove),
+   persisted by diffing `CalendarContract.Attendees`. No new permission for the
+   typed-email path. **Invitation behavior DECIDED 2026-06-22: record-only on all
+   writable calendars** — Calendula never sends (no INTERNET); honest backend-aware
+   copy ("your account may email guests when it syncs" on synced calendars, "no one
+   is notified" on local). Full sketch in `ROADMAP.md` → "Attendee editing".
+3. Then: the two INTERNET go/no-go calls (OSM autocomplete, remote calendar
+   create/edit) and Tier 2/3 leftovers (quick-settings tile, now-line, week
+   numbers in month, full-text search, accessibility pass). Drag-and-drop
+   rescheduling is **rejected**.

CHANGELOG.md

@@ -7,6 +7,349 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- A custom snooze duration. The **Snooze duration** setting (Settings →
+  Notifications) gains a **Custom…** option next to the minute presets: pick any
+  amount and switch between minutes and hours, so a snoozed reminder comes back
+  after exactly the delay you want instead of only a preset one ([#40]).
+- Move an event to another calendar. When editing an existing event, the
+  calendar row is now tappable — pick a different calendar and saving moves the
+  event across, instead of having to delete it and recreate it elsewhere.
+  Recurring series move as a whole, keeping their individually-edited and
+  cancelled occurrences, and any reminders and guests come along too. A calendar
+  can't simply be reassigned underneath an event, so Calendula recreates it on
+  the target and removes the original — the same approach other calendar apps
+  take. Thanks to @prismplex for the suggestion ([#39]).
+
+## [2.14.0] — 2026-07-06
+
+### Added
+- Restore events from a backup file. The backup section of Settings can now read
+  events back **in** from an `.ics` file, not just write one out: pick a file,
+  choose which calendar to import into, and Calendula adds the events — skipping
+  any that are already there and telling you how many it skipped. Export gained a
+  per-calendar selector at the same time, so you can back up just the calendars
+  you pick instead of everything at once ([#32]).
+- Week numbers in Month view. A new **Week numbers** setting (off by default)
+  adds a slim gutter down the left of the Month grid showing the calendar-week
+  number for each row, sized to match the day cells. Handy if you plan or refer
+  to dates by week number ([#25]).
+- Tap a date header to open that day. In Week and Agenda view, tapping a date
+  header now opens that date in Day view — the same drill-in that Month view and
+  the agenda widget already offered, so every view behaves the same way. It makes
+  jumping to a specific day quicker: switch to Week, swipe to the week you want,
+  then tap the date to open it. Thanks to @ptab for the suggestion ([#37]).
+- An early Simplified Chinese translation. Calendula has started speaking
+  Simplified Chinese, contributed as a community translation through
+  [Calendula's Weblate](https://weblate.dev.jeanlucmakiola.de/projects/calendula/).
+  It is still an early effort, so many parts of the app show in English until it
+  fills out — you can already pick it under Settings → Language or in Android's
+  per-app language settings. Thanks to
+  [zh-cn](https://weblate.dev.jeanlucmakiola.de/user/zh-cn/) for getting it
+  started; help finishing it is very welcome.
+
+### Changed
+- Long event titles wrap in the edit screen. When editing an event, a long title
+  now wraps onto multiple lines instead of being clipped to a single line, so you
+  can see and edit the whole thing ([#33]).
+
+## [2.13.1] — 2026-07-06
+
+### Added
+- Create events from other apps and widgets. Calendula now registers the
+  standard "insert event" intent (`ACTION_INSERT` on the calendar events type),
+  so other apps and home-screen widgets — such as the Todo Agenda widget — can
+  hand off to Calendula to create a new event. It opens the new-event form
+  prefilled with whatever they passed (title, start/end time, all-day, location,
+  description, recurrence), and picks your last-used or first writable calendar.
+  Thanks to @dschuermann for the suggestion ([#30]).
+
+### Fixed
+- Some recurring events could not be opened. Events in a series that started
+  before 1970 — for example yearly birthdays or anniversaries synced over CalDAV
+  — showed "Something went wrong" instead of opening, because their stored start
+  time is a negative value that was wrongly treated as invalid. They now open
+  normally and appear in search again. A related case (an event whose stored end
+  precedes its start) is now kept and openable instead of failing the same way.
+  Thanks to @dschuermann for the report ([#34]).
+- The time picker now follows your 24-hour setting. With Calendula set to
+  24-hour time, the clock dial for choosing an event's start and end time still
+  showed AM/PM instead of a 24-hour dial; it now matches your setting (and the
+  same fix applies to the all-day reminder time in Settings). Thanks to
+  @abrossimow for the report ([#27]).
+
+## [2.13.0] — 2026-07-03
+
+### Added
+- Calendula now speaks Spanish and Italian. Both arrived as community
+  translations through [Calendula's Weblate](https://weblate.dev.jeanlucmakiola.de/projects/calendula/)
+  — a **huge thank you** to
+  [kikerw](https://weblate.dev.jeanlucmakiola.de/user/kikerw/) for the Spanish
+  translation and to
+  [corrent](https://weblate.dev.jeanlucmakiola.de/user/corrent/) for the Italian
+  one! Pick your language under Settings → Language or in Android's per-app
+  language settings. Strings added in this very release may still show in
+  English until the translations catch up. Want Calendula in your language?
+  Translating happens entirely in the browser — every contribution is welcome.
+- See your contacts' birthdays and anniversaries in your calendar. A new,
+  **optional** feature (Settings → Contact special dates) mirrors your contacts'
+  birthdays, anniversaries and other dates into local "Birthdays",
+  "Anniversaries" and "Other dates" calendars that stay in sync as your contacts
+  change. Each is a normal local calendar, so you set its colour, visibility and
+  reminders the usual way — new birthdays even start with a reminder a week before
+  *and* on the day. The title format is yours to customise (`{name}`, `{year}`).
+  This is the first feature to use the contacts permission: it is requested only
+  when you turn the feature on, everything stays on your device (Calendula has no
+  internet access), and your contacts are only ever read, never changed. Thanks
+  to @moonj for the suggestion ([#15]).
+- Set more than one default reminder per calendar. A calendar's default
+  reminders — and the global defaults under Settings → Notifications — can now
+  hold several lead times instead of just one, so new events can start with, say,
+  a reminder a week before *and* one on the day. The reminder pickers are now
+  multi-select; per-calendar overrides can still inherit the global default or
+  turn reminders off entirely. Thanks to @moonj for the suggestion ([#14]).
+- Widget headers now open the app. Tapping the month/year title on the month
+  widget opens the app on the month view, and tapping the "Upcoming" title on
+  the agenda widget opens it on your default view — so there's a one-tap way
+  back into the app that lands where you'd expect, instead of only through a day
+  or event. On the month widget, tapping anywhere on a day — not just the small
+  date number — now opens that day, and the "today" button snaps the grid back
+  to the current month in place. Thanks to @rgz46vic and @ptab for the
+  suggestions ([#18], [#20]).
+- Make Calendula's text your own. Settings → Appearance gains **Headings font**
+  and **Body font** pickers: keep the system default, choose a bundled face
+  (Atkinson Hyperlegible, Lora, JetBrains Mono — each previewed in its own
+  face), or load any `.ttf`/`.otf` file from your device, independently per
+  role. Font size and colour stay with Android's accessibility scaling and the
+  app theme, as discussed on the issue. Thanks to @abrossimow for the
+  suggestion ([#19]).
+- Choose what the view-switch button cycles through. Settings → Appearance now
+  lets you pick which views the top-right quick-switch button rotates between
+  and drag them into your preferred order; views you switch off stay reachable
+  from the navigation menu, which can be reordered the same way. Thanks to
+  @abrossimow for the suggestion ([#24]).
+
+### Fixed
+- Month widget arrows and "today" button work again. On release builds the
+  prev/next-month arrows and the jump-to-today control on the month widget did
+  nothing when tapped — code shrinking had stripped the tap handlers behind
+  them. They respond again. Thanks to @rgz46vic for the report ([#18]).
+- Disabled calendars no longer notify. Reminders for events in a calendar you
+  have disabled (Settings → Calendars) are now suppressed instead of still
+  popping up — matching how a disabled calendar's events already stay hidden
+  everywhere else in the app ([#17]).
+- Editing a single occurrence of a recurring event works again. Choosing **Only
+  this event** and saving a change to one event in a repeating series silently
+  did nothing — the change was rejected and the edit form simply reappeared with
+  nothing applied. The edited occurrence is now stored correctly, so the change
+  lands on just that one event and leaves the rest of the series untouched
+  ([#16]).
+- Every calendar can be picked when creating an event. The event editor's
+  calendar picker was a fixed-height dialog, so with many calendars anything
+  past the first nine or so was simply unreachable. It is now a full-screen,
+  scrollable list grouped by account, with each calendar's colour shown.
+  Thanks to @dschuermann for the report ([#29]).
+
+## [2.12.0] — 2026-06-28
+
+### Added
+- See past events your way. Two new settings change how events that have already
+  ended are shown. **Past events** (Settings → Appearance → Agenda) lets the
+  agenda — both in the app and the home-screen "Upcoming" widget — keep them as
+  usual, dim them, or hide them from the list entirely. **Dim completed events**
+  (Settings → Appearance) separately fades finished events in the month and week
+  views. Both are off by default, an event only counts as finished once it has
+  actually ended (events still in progress are never dimmed), and the lists
+  update on their own as the day goes on. Thanks to @ptab for the suggestion
+  ([#12]).
+
+### Changed
+- Readable titles on overlapping events. In the week and day views, events that
+  overlap split a day into slim columns where the title used to be clipped to a
+  character or two. The title now wraps across as many lines as the block can
+  fit, and the time is hidden on those narrow blocks so the name can fill the
+  space — so you can tell events apart without opening each one. Thanks to @ptab
+  for the suggestion ([#13]).
+
+## [2.11.2] — 2026-06-28
+
+### Added
+- Jump straight to typing a title. When you start a new event, Calendula now puts
+  the cursor in the title field and opens the keyboard right away, so you can type
+  the name without an extra tap. It's on by default and only affects creating an
+  event — editing never grabs focus — and a new **Focus title on new event**
+  switch (Settings → New event form) turns it off. Thanks to @abrossimow for the
+  suggestion ([#10]).
+
+## [2.11.1] — 2026-06-28
+
+### Fixed
+- Calendula can now be set as your default calendar app. It registers the
+  calendar-app intent filters the system uses, so it appears in the chooser when
+  you tap a date in a launcher or clock — and opening one takes you straight to
+  that day. Android has no way for an app to make itself the default, so you pick
+  it once from the system picker. Thanks to @abrossimow for the report ([#9]).
+
+## [2.11.0] — 2026-06-27
+
+### Added
+- Start the week on any day. The **Week starts on** setting (Settings →
+  Appearance) now offers every weekday — not just Monday or Sunday — alongside
+  the automatic, locale-based default. Thanks to @zmaherdev for the suggestion
+  ([#3]).
+- Choose a 12- or 24-hour clock. A new **Time format** setting (Settings →
+  Appearance) lets you force a 12-hour (2:00 PM) or 24-hour (14:00) clock, or
+  follow the system setting automatically. It applies everywhere times appear —
+  the week and day timelines, agenda, event details, search and reminders — so
+  the format is now consistent across the whole app. Thanks to @zmaherdev for
+  the suggestion ([#6]).
+- Optional hour lines in the timeline. A new **Hour lines** switch (Settings →
+  Appearance) draws a faint separator at each hour in the week and day views,
+  making it easier to see when events start and end. Off by default. Thanks to
+  @zmaherdev for the suggestion ([#5]).
+- Limit how far ahead the agenda looks, and switch it on the fly. New **Agenda
+  range** and **Agenda widget range** settings (Settings → Appearance) let the
+  agenda screen and its home-screen widget each show just today, the rest of this
+  week, the rest of this month, a rolling 7 or 30 days, or a custom number of
+  days — "This week" follows your week-start. The agenda also gains a bar at the
+  top naming the exact dates in view, with a button to switch the range just for
+  the current session (it resets when you reopen the app); the bar can be turned
+  off. Thanks to @zmaherdev for the suggestion ([#4]).
+- Automatic backup of local calendars. A new **Automatic backup** option
+  (Settings → Calendars → Backup) periodically exports your local calendars to an
+  `.ics` file in a folder you choose, on an interval you set (from 30 minutes up).
+  Useful for file-based syncing such as Syncthing, or simply as a safety net — it
+  is a one-way export and never touches your synced accounts. Thanks to @shield
+  for the discussion that inspired it ([#7], [#8]).
+- Field icons in the event-form settings. Each optional-field toggle (Settings →
+  Event form) now shows the same icon the field uses in the new-event form, so
+  the list is easier to scan.
+- Help translate Calendula. A **Help translate** link at the top of **Settings →
+  App language** opens the project's Weblate, where you can add or improve a
+  language in your browser — no coding needed. Contributions in any language are
+  welcome.
+
+### Changed
+- Tidied **Settings → Appearance** into clearer groups (theme & colour, calendar,
+  agenda), and the agenda's empty state now reads "You're all caught up".
+- Reworked **Settings → Calendars**. Local and synced calendars are now grouped
+  into collapsible, source-branded cards — each account shows its app's icon —
+  with a per-account menu to enable or disable all of its calendars at once or
+  open the account in its source app.
+- Reorganised **Settings → Notifications**: reliable-delivery and snooze settings
+  moved up with the other global reminder options, and the per-calendar reminder
+  overrides now fold into a single expandable section.
+- Moved **Add Quick Settings tile** out of the event-form section to its own
+  top-level entry in Settings.
+
+## [2.10.0] — 2026-06-25
+
+### Added
+- Turn a calendar off across the whole app. Settings → Calendars now has a
+  switch on every calendar — both your own and synced ones. Switching one off
+  removes it everywhere: its events disappear from all views and search, and it
+  drops out of the drawer's hide/show filter, the event-form calendar picker and
+  the import target picker. Unlike hiding (the quick per-view checkbox in the
+  drawer), a disabled calendar leaves the app entirely until you turn it back on.
+  Nothing is deleted and no other app is affected — it's a Calendula-only view
+  choice — so you can re-enable it any time from the same screen, where disabled
+  calendars stay listed but dimmed.
+- An optional way to support development. Settings → About now has a "Support
+  development" button that opens Ko-fi in your browser. It's a plain donation
+  link with no perks attached, and it needs no new permissions — Calendula still
+  has no internet access of its own and just hands the link to your browser.
+
+## [2.9.0] — 2026-06-25
+
+### Added
+- Choose the view Calendula opens on. A new **Default view** setting (Settings →
+  Appearance) lets you pick Month, Week, Day or Agenda as the view shown each
+  time you start the app, instead of always opening on Week. Thanks to
+  @devinside for the suggestion ([#1]).
+- The month widget is now interactive: tap any day to open it, or tap an event to
+  open its details. Previously only the month's prev/next/today controls
+  responded. Thanks to @devinside for spotting this ([#2]).
+- Predictive back. Swiping back from a screen — an event, the editor, search or
+  settings — now follows your finger, shrinking the screen to preview what's
+  behind so you can see where Back will take you before you let go; slide it back
+  to cancel. The preview needs Android 14 or newer; on older versions Back works
+  as before.
+- Respect for "Remove animations". If you've turned animations off in your
+  device's Accessibility settings, Calendula now honours it everywhere: motion
+  collapses to a quick fade and the back preview is skipped.
+
+### Changed
+- Smoother, more consistent motion throughout. Expanding sections, list updates
+  in search and agenda, and the onboarding screens now animate the same way
+  across the app, instead of some places sliding or growing while others popped
+  in. Switching between Month, Week, Day and Agenda now cross-fades rather than
+  snapping, while paging within a view keeps its slide.
+
+### Fixed
+- Home-screen widgets now back out the way you came in. A day or event opened
+  from the Agenda widget keeps you in the agenda context, and from the Month
+  widget in the month context — pressing Back returns there instead of dropping
+  you on the week view. More broadly, the app now keeps a real view history:
+  switching views and drilling into a day are retraced by Back one step at a
+  time, down to your default view before the app exits. Thanks to @devinside for
+  reporting ([#2]).
+
+## [2.8.0] — 2026-06-23
+
+### Added
+- Find events fast. A search button in the top bar of every calendar view opens
+  a search box — type a couple of letters and matching events (by title,
+  location or description) appear, soonest first with past events below. Tap a
+  result to open it. Search covers your whole calendar, not just what's on
+  screen, and skips calendars you've hidden. A recurring event shows its next
+  occurrence rather than the date the series first started.
+- A current-time line in the day and week views. A thin coloured line marks the
+  present moment across today's column, so you can see at a glance where you are
+  in the day. It updates every minute and only appears when today is in view.
+- Add and remove event guests. The create/edit form now has a Guests section:
+  add people by email or pick them from your contacts, mark each as required or
+  optional, and remove them. Calendula never sends invitations itself (it has no
+  internet access) — it only records the guests; if the event lives on a synced
+  account, that account may email them when it syncs, and on a local calendar no
+  one is notified. The form tells you which applies. Picking a guest from
+  contacts needs no contacts permission.
+- Pick a location from your contacts. A contacts button beside the location
+  field drops a contact's address straight into an event — handy for a meeting
+  at someone's home or office. Like the guest picker, it needs no contacts
+  permission.
+- A "New event" Quick Settings tile. Add it to your quick settings to jump
+  straight into the new-event form from anywhere. Settings → New event has a
+  one-tap button to add the tile (Android 13+); on older versions you can add it
+  from the quick-settings editor.
+- Snooze and dismiss buttons on reminder notifications. Dismiss clears the
+  reminder; snooze hides it and brings it back after a delay you pick in
+  Settings → Notifications (5 to 60 minutes, default 10). Android's calendar
+  system won't re-post a reminder on its own, so Calendula schedules an exact
+  alarm to bring a snoozed one back on time.
+
+### Changed
+- Event details now show each guest's email beneath their name, instead of only
+  when no name is available.
+- Crash and problem reports now open on the project's public Codeberg tracker,
+  where anyone can register and file an issue. Nothing is sent automatically —
+  you still review the report and submit it yourself in the browser.
+
+## [2.7.5] — 2026-06-21
+
+### Changed
+- Further build cleanup for the official F-Droid repository: stopped embedding
+  AGP's dependency-metadata block in the APK, which F-Droid's reproducible-build
+  scanner rejects as an extra signing block. No functional or visible changes —
+  the same app as 2.7.4, just without that Play-oriented metadata blob.
+
+## [2.7.4] — 2026-06-21
+
+### Changed
+- Build cleanup that lets Calendula ship in the official F-Droid repository:
+  removed an unused Gradle toolchain-resolver plugin, which F-Droid's offline,
+  reproducible build process disallows. No functional or visible changes — this
+  is the same app as 2.7.3.
+
 ## [2.7.3] — 2026-06-21
 
 ### Fixed
@@ -518,3 +861,34 @@ automatically, with zero telemetry and no internet permission.
 - Gitea release workflow: signed release APK + F-Droid metadata sync to Hetzner
 - F-Droid metadata stubs (DE + EN short/full descriptions)
 - `.planning/` project-tracking documents
+
+[#1]: https://codeberg.org/jlmakiola/calendula/issues/1
+[#2]: https://codeberg.org/jlmakiola/calendula/issues/2
+[#3]: https://codeberg.org/jlmakiola/calendula/issues/3
+[#4]: https://codeberg.org/jlmakiola/calendula/issues/4
+[#5]: https://codeberg.org/jlmakiola/calendula/issues/5
+[#6]: https://codeberg.org/jlmakiola/calendula/issues/6
+[#7]: https://codeberg.org/jlmakiola/calendula/issues/7
+[#8]: https://codeberg.org/jlmakiola/calendula/issues/8
+[#9]: https://codeberg.org/jlmakiola/calendula/issues/9
+[#10]: https://codeberg.org/jlmakiola/calendula/issues/10
+[#12]: https://codeberg.org/jlmakiola/calendula/issues/12
+[#13]: https://codeberg.org/jlmakiola/calendula/issues/13
+[#14]: https://codeberg.org/jlmakiola/calendula/issues/14
+[#15]: https://codeberg.org/jlmakiola/calendula/issues/15
+[#16]: https://codeberg.org/jlmakiola/calendula/issues/16
+[#17]: https://codeberg.org/jlmakiola/calendula/issues/17
+[#18]: https://codeberg.org/jlmakiola/calendula/issues/18
+[#19]: https://codeberg.org/jlmakiola/calendula/issues/19
+[#20]: https://codeberg.org/jlmakiola/calendula/issues/20
+[#24]: https://codeberg.org/jlmakiola/calendula/issues/24
+[#25]: https://codeberg.org/jlmakiola/calendula/issues/25
+[#27]: https://codeberg.org/jlmakiola/calendula/issues/27
+[#29]: https://codeberg.org/jlmakiola/calendula/issues/29
+[#30]: https://codeberg.org/jlmakiola/calendula/issues/30
+[#32]: https://codeberg.org/jlmakiola/calendula/issues/32
+[#33]: https://codeberg.org/jlmakiola/calendula/issues/33
+[#34]: https://codeberg.org/jlmakiola/calendula/issues/34
+[#37]: https://codeberg.org/jlmakiola/calendula/issues/37
+[#39]: https://codeberg.org/jlmakiola/calendula/issues/39
+[#40]: https://codeberg.org/jlmakiola/calendula/issues/40

README.md

@@ -15,6 +15,12 @@ Reads, writes, and reminds — on top of the system calendar, with zero network
 <a href="LICENSE"><img src="https://img.shields.io/badge/License-MIT-green" alt="MIT License"></a>
 </p>
 
+<p>
+<a href="https://f-droid.org/packages/de.jeanlucmakiola.calendula/"><img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png" alt="Get it on F-Droid" height="56"></a>
+&nbsp;
+<a href="https://ko-fi.com/jeanlucmakiola"><img src="https://storage.ko-fi.com/cdn/brandasset/v2/support_me_on_kofi_badge_beige.png" alt="Support me on Ko-fi" height="56"></a>
+</p>
+
 <p>
 <img src="fastlane/metadata/android/en-US/images/phoneScreenshots/01-week.png" width="19%" alt="Week view">&nbsp;
 <img src="fastlane/metadata/android/en-US/images/phoneScreenshots/02-month.png" width="19%" alt="Month view">&nbsp;
@@ -62,19 +68,27 @@ database, no sync stack reinvented.
 
 - Real Material 3 Expressive throughout — dynamic color (Android 12+),
   expressive motion and shapes, light/dark theme
-- German and English UI, per-app language setting
+- German and English UI, per-app language setting — and [open to community
+  translations](#-translations)
 - **Zero telemetry, zero analytics, no internet permission** — your data
   never leaves the device
 
 ## 📦 Install
 
-Calendula ships through a self-hosted F-Droid repository; every version tag
-is built, signed, and published there automatically.
+### F-Droid (recommended)
 
-1. Install an F-Droid client ([F-Droid](https://f-droid.org), Droid-ify, Neo
-   Store, …).
-2. Add the repository — open this link on your phone, or paste it under
-   *Settings → Repositories → Add*:
+Calendula is on the **official [F-Droid](https://f-droid.org) repository** —
+just search for **Calendula** in any F-Droid client, or
+[install it from f-droid.org](https://f-droid.org/packages/de.jeanlucmakiola.calendula/).
+
+### Self-hosted repo (latest builds)
+
+New versions are built, signed, and published to a self-hosted repository the
+moment each tag lands — usually a few days ahead of the official repo, which
+rebuilds on F-Droid's own schedule. Add it for the freshest builds:
+
+1. In your F-Droid client, open *Settings → Repositories → Add* (or open the
+   link below on your phone):
 
    ```
    https://apps.dev.jeanlucmakiola.de/dev/fdroid/repo?fingerprint=C2C0640402BF458FC0ED957AF0B37AA4C14022E72F89CE90B5965B458CF73425
@@ -84,36 +98,27 @@ is built, signed, and published there automatically.
    fingerprint (SHA-256):
    `C2C0 6404 02BF 458F C0ED 957A F0B3 7AA4 C140 22E7 2F89 CE90 B596 5B45 8CF7 3425`</sub>
 
-3. Refresh, search for **Calendula**, install. Updates arrive like any
-   other F-Droid app.
+2. Refresh, search for **Calendula**, install.
 
-Alternatively, build from source — see below.
+Both channels share the same signing key, so you can switch between them
+without reinstalling. Or build from source — see below.
 
-## 🛠 Building
+## 📚 Documentation
 
-Requires Android SDK 36+ and JDK 17. The Gradle wrapper is checked in:
+- **[Building from source](docs/BUILDING.md)** — requirements and Gradle tasks
+- **[Architecture](docs/ARCHITECTURE.md)** — the layered design and key pipelines
+- **[Roadmap](.planning/ROADMAP.md)** — what's shipped and what's next
 
-```bash
-./gradlew assembleDebug   # debug APK
-./gradlew test            # JVM unit tests
-./gradlew lint            # Android lint
-```
+## 🌍 Translations
 
-If your default JDK is not 17, set `JAVA_HOME` explicitly.
+Calendula ships in German and English, and you're warmly invited to add your
+language. Translations are managed on a self-hosted **Weblate**:
 
-## 🏗 Architecture
+**→ [Help translate Calendula](https://weblate.dev.jeanlucmakiola.de/engage/calendula/)**
 
-Single-activity Compose app, layered `UI → Repository → DataSource →
-CalendarContract`, observer-driven refresh, JVM-first tests. The full tour —
-including the recurring-write and reminder pipelines — lives in
-[docs/ARCHITECTURE.md](docs/ARCHITECTURE.md).
-
-## 🗺 Roadmap
-
-Shipped: read (v1.0), write (v1.1–v2.0), reminder delivery (v1.4).
-Next up: power-user features — widget, search, tablet layouts. The living
-roadmap is in [.planning/ROADMAP.md](.planning/ROADMAP.md), the release
-history in [CHANGELOG.md](CHANGELOG.md).
+No coding needed — register on the Weblate server, pick (or request) a language,
+and translate the strings in your browser. You can also reach this link in the
+app from the top of **Settings → App language**.
 
 ## 📜 License
 

app/build.gradle.kts

@@ -28,8 +28,8 @@ android {
         // which builds this version and then creates the matching vX.Y.Z tag +
         // release itself (versionCode is pinned to MAJOR*10000 + MINOR*100 +
         // PATCH from versionName, e.g. 2.7.2 -> 20702). See docs/RELEASING.md.
-        versionCode = 20703
-        versionName = "2.7.3"
+        versionCode = 21400
+        versionName = "2.14.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -90,6 +90,18 @@ android {
 
     buildFeatures {
         compose = true
+        // BuildConfig.DEBUG gates the in-app debug ribbon (see DebugRibbon).
+        buildConfig = true
+    }
+
+    // Don't embed AGP's dependency-metadata block in the APK signing block. It's
+    // a Play-oriented blob, and F-Droid's reproducible-build scanner rejects any
+    // "extra signing block" — so leaving it in blocks publishing to the official
+    // repo. It lives in the signing block, not the zip entries, so disabling it
+    // doesn't change the build output (reproducibility is unaffected).
+    dependenciesInfo {
+        includeInApk = false
+        includeInBundle = false
     }
 
     packaging {
@@ -142,10 +154,19 @@ dependencies {
 
     implementation(libs.androidx.datastore.preferences)
 
+    implementation(libs.androidx.work.runtime.ktx)
+    implementation(libs.androidx.documentfile)
+
     implementation(libs.androidx.glance.appwidget)
     implementation(libs.androidx.glance.material3)
 
     implementation(libs.kotlinx.datetime)
+    implementation("de.jeanlucmakiola.floret:core-time")
+    implementation("de.jeanlucmakiola.floret:core-locale")
+    implementation("de.jeanlucmakiola.floret:core-crash")
+    implementation("de.jeanlucmakiola.floret:core-reminders")
+    implementation("de.jeanlucmakiola.floret:identity")
+    implementation("de.jeanlucmakiola.floret:components")
     implementation(libs.kotlinx.coroutines.core)
 
     debugImplementation(libs.androidx.ui.tooling)

app/proguard-rules.pro

@@ -16,6 +16,18 @@
 -keep class * extends androidx.room.RoomDatabase { *; }
 -dontwarn androidx.room.paging.**
 
+# Glance runs an @Composable's `actionRunCallback<T>()` by persisting the
+# callback's fully-qualified class name into the click PendingIntent, then
+# reflectively instantiating it (Class.forName(name).newInstance()) when the tap
+# fires. Under R8 full mode (AGP 9 default) these ActionCallback classes — only
+# ever referenced reflectively — get renamed or have their no-arg constructor
+# stripped, so the lookup fails silently and the tap does nothing. In the month
+# and agenda widgets that broke every run-callback control (the prev/next/today
+# month arrows and the agenda refresh) in release builds while actionStartActivity
+# taps, which ride a PendingIntent and need no reflection, kept working. Keep
+# every ActionCallback's name and constructor intact.
+-keep class * implements androidx.glance.appwidget.action.ActionCallback { <init>(...); }
+
 # WorkManager instantiates an InputMerger reflectively (Class.newInstance) from
 # the fully-qualified class name persisted in the WorkSpec, so the class must
 # keep both its name and a no-arg constructor. Glance renders every widget

app/src/debug/res/values/colors.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Debug-only launcher-icon background. Production is slate (#5C6B7A); the
+    debug build paints the adaptive-icon background burnt orange instead, so the
+    debug icon reads at a glance as "not the real app" on the home screen. The
+    off-white foreground mark contrasts on both. See drawable/ic_launcher_background.
+-->
+<resources>
+    <color name="ic_launcher_background">#FFB23B00</color>
+</resources>

app/src/debug/res/values/strings.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Debug-build resource overrides. Merged on top of src/main for the `debug`
+    build type only (release/releaseTest keep the production values), so the
+    debug app is unmistakable on the launcher: its own label, alongside the
+    real app thanks to the `.debug` applicationId suffix.
+-->
+<resources>
+    <string name="app_name">Calendula Debug</string>
+</resources>

app/src/main/AndroidManifest.xml

@@ -5,6 +5,15 @@
     <uses-permission android:name="android.permission.READ_CALENDAR" />
     <uses-permission android:name="android.permission.WRITE_CALENDAR" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <!--
+      Optional and feature-gated: only the "Contact special dates" feature reads
+      contacts, and only after the user enables it and grants this at runtime
+      (never requested at startup). Everything stays offline — birthdays and
+      other contact dates are mirrored one-way into local calendars; contacts
+      are never written and nothing leaves the device (the app has no INTERNET
+      permission). See docs/design/contact-special-dates.md.
+    -->
+    <uses-permission android:name="android.permission.READ_CONTACTS" />
     <!--
       Lets the "Reliable delivery" setting open the direct system dialog to
       exempt Calendula from battery optimisation (so reminder broadcasts aren't
@@ -13,6 +22,17 @@
     -->
     <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
 
+    <!--
+      Re-fire a snoozed reminder at an exact time (the calendar provider won't —
+      its alert is already fired). USE_EXACT_ALARM is auto-granted to calendar
+      apps on API 33+; SCHEDULE_EXACT_ALARM covers API 31–32 (user-revocable,
+      with an inexact fallback if withheld). F-Droid-clean: no Play allowlisting.
+    -->
+    <uses-permission
+        android:name="android.permission.SCHEDULE_EXACT_ALARM"
+        android:maxSdkVersion="32" />
+    <uses-permission android:name="android.permission.USE_EXACT_ALARM" />
+
     <!-- Package visibility (Android 11+): without this, getLaunchIntentForPackage
          returns null and the calendar manager's per-account "manage" button can't
          open the source sync app (DAVx5, ICSx5, Google Calendar, …). The LAUNCHER
@@ -28,6 +48,7 @@
     <application
         android:name=".CalendulaApp"
         android:allowBackup="true"
+        android:enableOnBackInvokedCallback="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
         android:icon="@mipmap/ic_launcher"
@@ -47,6 +68,35 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
 
+            <!-- Be selectable as the system calendar app. Android has no API for
+                 an app to make itself the default, so registering the filters
+                 launchers and the OS use is what lets the user pick Calendula
+                 from the system chooser when a date action fires (issue #9).
+                 APP_CALENDAR is the "open the calendar app" action; the VIEW
+                 filters below catch a tapped date. -->
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.APP_CALENDAR" />
+            </intent-filter>
+            <!-- A launcher/clock date tap fires ACTION_VIEW on the provider's
+                 time Uri (content://com.android.calendar/time/<epochMillis>);
+                 some surfaces use the time/epoch mime type. We open the day view
+                 on that date (MainActivity.calendarTimeDateOrNull). -->
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data
+                    android:scheme="content"
+                    android:host="com.android.calendar"
+                    android:pathPrefix="/time" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="time/epoch" />
+            </intent-filter>
+
             <!-- Open a .ics file (file manager / email attachment / browser). -->
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -62,6 +112,17 @@
                 <data android:mimeType="text/calendar" />
             </intent-filter>
 
+            <!-- Let another app or widget (e.g. the Todo Agenda widget) launch us
+                 to create a new event, the way the AOSP calendar accepts it:
+                 ACTION_INSERT on the events dir mime type, carrying the new
+                 event's fields as CalendarContract extras
+                 (MainActivity.insertFormOrNull, issue #30). -->
+            <intent-filter>
+                <action android:name="android.intent.action.INSERT" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="vnd.android.cursor.dir/event" />
+            </intent-filter>
+
             <!-- Launcher long-press shortcuts (e.g. "New event"). -->
             <meta-data
                 android:name="android.app.shortcuts"
@@ -77,6 +138,20 @@
             android:excludeFromRecents="true"
             android:launchMode="singleTask" />
 
+        <!-- Quick Settings tile: a one-tap "New event" shortcut in the QS panel.
+             Exported with BIND_QUICK_SETTINGS_TILE so only the system QS host can
+             bind it; the action mirrors the launcher "New event" shortcut. -->
+        <service
+            android:name=".qs.NewEventTileService"
+            android:exported="true"
+            android:icon="@drawable/ic_qs_new_event"
+            android:label="@string/qs_tile_new_event_label"
+            android:permission="android.permission.BIND_QUICK_SETTINGS_TILE">
+            <intent-filter>
+                <action android:name="android.service.quicksettings.action.QS_TILE" />
+            </intent-filter>
+        </service>
+
         <!-- The provider broadcasts EVENT_REMINDER at reminder time but posts
              no notification itself — a calendar app must (v1.4, Etar model).
              Exported: the broadcast arrives from the provider's process. -->
@@ -91,6 +166,13 @@
             </intent-filter>
         </receiver>
 
+        <!-- Snooze / dismiss actions on a reminder notification, plus the snooze
+             re-show alarm. Not exported: only our own notification buttons and
+             AlarmManager PendingIntents target it. -->
+        <receiver
+            android:name=".data.reminders.ReminderActionReceiver"
+            android:exported="false" />
+
         <!-- Home-screen widgets (Glance). Exported: the launcher/host binds them. -->
         <receiver
             android:name=".widget.agenda.AgendaWidgetReceiver"

app/src/main/java/de/jeanlucmakiola/calendula/CalendulaApp.kt

@@ -1,8 +1,19 @@
 package de.jeanlucmakiola.calendula
 
 import android.app.Application
+import dagger.hilt.android.EntryPointAccessors
 import dagger.hilt.android.HiltAndroidApp
-import de.jeanlucmakiola.calendula.data.crash.CrashReporter
+import de.jeanlucmakiola.calendula.data.backup.BackupScheduler
+import de.jeanlucmakiola.calendula.data.backup.BackupWorker
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesScheduler
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesSyncWorker
+import de.jeanlucmakiola.floret.crash.CrashConfig
+import de.jeanlucmakiola.floret.crash.CrashReporter
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
 
 /**
  * Application entry point. Registered as android:name=".CalendulaApp"
@@ -14,7 +25,54 @@ class CalendulaApp : Application() {
     override fun onCreate() {
         super.onCreate()
         // Install first thing so startup crashes are captured too (privacy-
-        // respecting, on-device; the user submits the report by hand).
-        CrashReporter.install(this)
+        // respecting, on-device; the user submits the report by hand). The
+        // capture/loop-detection/report machinery lives in floret-kit's
+        // core-crash; only the app label + issue-tracker URLs are app-specific.
+        CrashReporter.install(
+            this,
+            CrashConfig(
+                appLabel = getString(R.string.app_name),
+                newIssueUrl = getString(R.string.report_issue_url),
+                chooseIssueUrl = getString(R.string.report_issue_choose_url),
+                issueTitle = getString(R.string.crash_report_issue_title),
+            ),
+        )
+        reconcileAutoBackup()
+        reconcileSpecialDates()
+    }
+
+    /**
+     * Bring the scheduled auto-backup work back in line with the saved settings
+     * on every launch — re-arms it after a reinstall and, crucially, cancels any
+     * orphaned work once backup has been turned off.
+     */
+    private fun reconcileAutoBackup() {
+        val deps = EntryPointAccessors.fromApplication(this, BackupWorker.Deps::class.java)
+        CoroutineScope(SupervisorJob() + Dispatchers.Default).launch {
+            val prefs = deps.settingsPrefs()
+            BackupScheduler.apply(
+                context = this@CalendulaApp,
+                enabled = prefs.autoBackupEnabled.first(),
+                intervalMinutes = prefs.autoBackupIntervalMinutes.first(),
+                hasFolder = prefs.autoBackupFolderUri.first() != null,
+            )
+        }
+    }
+
+    /**
+     * Re-arm (or cancel) the daily special-dates reconcile from the saved
+     * settings on every launch — like [reconcileAutoBackup], this cancels
+     * orphaned work after the feature is turned off and re-schedules after a
+     * reinstall. The foreground trigger (RootScreen ON_RESUME) does the on-open
+     * refresh, so no immediate run is needed here.
+     */
+    private fun reconcileSpecialDates() {
+        val deps = EntryPointAccessors.fromApplication(this, SpecialDatesSyncWorker.Deps::class.java)
+        CoroutineScope(SupervisorJob() + Dispatchers.Default).launch {
+            SpecialDatesScheduler.apply(
+                context = this@CalendulaApp,
+                enabled = deps.settingsPrefs().specialDatesEnabled.first(),
+            )
+        }
     }
 }

app/src/main/java/de/jeanlucmakiola/calendula/MainActivity.kt

@@ -4,30 +4,49 @@ import android.content.Context
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
+import android.provider.CalendarContract
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
 import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.core.content.IntentCompat
 import androidx.core.net.toUri
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import dagger.hilt.android.AndroidEntryPoint
-import de.jeanlucmakiola.calendula.data.crash.CrashReporter
 import de.jeanlucmakiola.calendula.data.prefs.ThemeMode
+import de.jeanlucmakiola.calendula.data.prefs.is24Hour
+import de.jeanlucmakiola.calendula.domain.EventForm
+import de.jeanlucmakiola.calendula.domain.buildInsertEventForm
 import de.jeanlucmakiola.calendula.ui.RootScreen
+import de.jeanlucmakiola.calendula.ui.common.LocalShowHourLines
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
 import de.jeanlucmakiola.calendula.ui.WidgetNavRequest
+import de.jeanlucmakiola.calendula.ui.common.CalendarView
+import de.jeanlucmakiola.floret.components.DebugRibbon
 import de.jeanlucmakiola.calendula.ui.crash.CrashReportActivity
-import de.jeanlucmakiola.calendula.ui.crash.CrashReportDialog
-import de.jeanlucmakiola.calendula.ui.crash.submitCrashReport
+import de.jeanlucmakiola.calendula.domain.FontRole
 import de.jeanlucmakiola.calendula.ui.settings.SettingsViewModel
+import de.jeanlucmakiola.floret.crash.CrashReportDialog
+import de.jeanlucmakiola.floret.crash.CrashReporter
+import de.jeanlucmakiola.floret.crash.submitCrashReport
 import de.jeanlucmakiola.calendula.ui.theme.CalendulaTheme
+import de.jeanlucmakiola.calendula.ui.theme.calendulaTypography
+import de.jeanlucmakiola.calendula.ui.theme.resolveFontFamily
 import kotlinx.datetime.LocalDate
+import kotlinx.datetime.TimeZone
+import kotlinx.datetime.toLocalDateTime
+import kotlin.time.Clock
+import kotlin.time.Instant
 
 @AndroidEntryPoint
 class MainActivity : AppCompatActivity() {
@@ -45,6 +64,11 @@ class MainActivity : AppCompatActivity() {
     // by CalendarHost's import flow.
     private var requestedImportUri by mutableStateOf<Uri?>(null)
 
+    // A prefilled new-event form from an external ACTION_INSERT launch (another
+    // app/widget asking us to create an event, issue #30). Consumed once by
+    // CalendarHost, which opens it in the create form for review.
+    private var requestedInsertForm by mutableStateOf<EventForm?>(null)
+
     // A captured crash report awaiting the user's decision, surfaced as a dialog
     // over the calendar on the next launch (the single-crash path). A startup
     // crash-loop is handled out of band, before setContent — see below.
@@ -69,6 +93,7 @@ class MainActivity : AppCompatActivity() {
         requestedDetailKey = intent.detailKeyOrNull()
         requestedNav = intent.navRequestOrNull()
         requestedImportUri = intent.importUriOrNull()
+        requestedInsertForm = intent.insertFormOrNull()
         if (CrashReporter.shouldPrompt(this)) pendingCrashReport = CrashReporter.pendingReport(this)
         setContent {
             // One activity-scoped SettingsViewModel drives both the theme here
@@ -80,9 +105,34 @@ class MainActivity : AppCompatActivity() {
                 ThemeMode.LIGHT -> false
                 ThemeMode.DARK -> true
             }
+            // The app-wide clock convention: the time-format preference resolved
+            // against the device's 24-hour system setting, provided once here so
+            // every time label reads it via LocalUse24HourFormat.
+            val context = LocalContext.current
+            val use24Hour = remember(settings.timeFormat, context) {
+                settings.timeFormat.is24Hour(android.text.format.DateFormat.is24HourFormat(context))
+            }
+            // The user's custom-font choice, resolved to a Material typography
+            // (issue #19). Recomputed only when a token — or the custom-font
+            // re-import stamp AppFontSettings carries, so replacing the file
+            // behind an active "custom" token still refreshes — changes;
+            // "system for both" returns the default scale untouched.
+            val fonts by settingsViewModel.fontState.collectAsStateWithLifecycle()
+            val typography = remember(fonts, context) {
+                calendulaTypography(
+                    brand = resolveFontFamily(fonts.brand, FontRole.BRAND, context),
+                    plain = resolveFontFamily(fonts.plain, FontRole.PLAIN, context),
+                )
+            }
             CalendulaTheme(
                 darkTheme = darkTheme,
                 dynamicColor = settings.dynamicColor,
+                typography = typography,
+            ) {
+                Box(modifier = Modifier.fillMaxSize()) {
+                    CompositionLocalProvider(
+                        LocalUse24HourFormat provides use24Hour,
+                        LocalShowHourLines provides settings.showHourLines,
                     ) {
                         RootScreen(
                             modifier = Modifier.fillMaxSize(),
@@ -92,7 +142,14 @@ class MainActivity : AppCompatActivity() {
                             onWidgetNavConsumed = { requestedNav = null },
                             requestedImportUri = requestedImportUri,
                             onImportConsumed = { requestedImportUri = null },
+                            requestedInsertForm = requestedInsertForm,
+                            onInsertConsumed = { requestedInsertForm = null },
                         )
+                    }
+                    // A persistent corner marker so a debug build is never
+                    // mistaken for the production app; compiled out of release.
+                    if (BuildConfig.DEBUG) DebugRibbon()
+                }
                 pendingCrashReport?.let { report ->
                     CrashReportDialog(
                         report = report,
@@ -124,6 +181,7 @@ class MainActivity : AppCompatActivity() {
         intent.detailKeyOrNull()?.let { requestedDetailKey = it }
         intent.navRequestOrNull()?.let { requestedNav = it }
         intent.importUriOrNull()?.let { requestedImportUri = it }
+        intent.insertFormOrNull()?.let { requestedInsertForm = it }
     }
 
     /**
@@ -137,21 +195,95 @@ class MainActivity : AppCompatActivity() {
             Intent.ACTION_SEND -> IntentCompat.getParcelableExtra(this, Intent.EXTRA_STREAM, Uri::class.java)
             else -> null
         } ?: return null
+        // The calendar "view time" Uri (a date tap) is also ACTION_VIEW/content;
+        // it's a navigation, not a file to import, so [navRequestOrNull] owns it.
+        if (uri.host == CALENDAR_PROVIDER_HOST) return null
         return uri.takeIf { it.scheme == "content" || it.scheme == "file" }
     }
 
-    private fun Intent.navRequestOrNull(): WidgetNavRequest? = when {
+    /**
+     * A prefilled new-event form from an external `ACTION_INSERT` launch — another
+     * app or widget (e.g. Todo Agenda) asking us to create an event (issue #30).
+     * The new event's fields ride as CalendarContract extras; anything omitted
+     * falls back to the in-app "new event" defaults in [buildInsertEventForm].
+     */
+    private fun Intent.insertFormOrNull(): EventForm? {
+        if (action != Intent.ACTION_INSERT) return null
+        return buildInsertEventForm(
+            beginMillis = longExtraOrNull(CalendarContract.EXTRA_EVENT_BEGIN_TIME),
+            endMillis = longExtraOrNull(CalendarContract.EXTRA_EVENT_END_TIME),
+            isAllDay = getBooleanExtra(CalendarContract.EXTRA_EVENT_ALL_DAY, false),
+            title = getStringExtra(CalendarContract.Events.TITLE),
+            description = getStringExtra(CalendarContract.Events.DESCRIPTION),
+            location = getStringExtra(CalendarContract.Events.EVENT_LOCATION),
+            rrule = getStringExtra(CalendarContract.Events.RRULE),
+            zone = TimeZone.currentSystemDefault(),
+            now = Clock.System.now(),
+        )
+    }
+
+    /** A Long extra's value, or null when the extra is absent. */
+    private fun Intent.longExtraOrNull(key: String): Long? =
+        if (hasExtra(key)) getLongExtra(key, 0L) else null
+
+    /**
+     * The date a launcher/clock date tap points at, parsed from the AOSP calendar
+     * "view time" intent: ACTION_VIEW on `content://com.android.calendar/time/
+     * <epochMillis>`. Null for any other intent. The matching manifest filter is
+     * what lets users pick Calendula from the system calendar chooser (issue #9).
+     */
+    private fun Intent.calendarTimeDateOrNull(): LocalDate? {
+        if (action != Intent.ACTION_VIEW) return null
+        val uri = data ?: return null
+        if (uri.host != CALENDAR_PROVIDER_HOST) return null
+        val segments = uri.pathSegments
+        if (segments.firstOrNull() != "time") return null
+        val millis = segments.getOrNull(1)?.toLongOrNull() ?: return null
+        return Instant.fromEpochMilliseconds(millis)
+            .toLocalDateTime(TimeZone.currentSystemDefault()).date
+    }
+
+    private fun Intent.navRequestOrNull(): WidgetNavRequest? {
+        // An external date tap (launcher/clock) has no widget source, so it opens
+        // the day view rooted over the default home view (OpenDate source = null).
+        calendarTimeDateOrNull()?.let { return WidgetNavRequest.OpenDate(it.toString(), source = null) }
+        // A widget header tap: open a top-level view with no date drill-in. The
+        // empty string carried by [openViewIntent] means "the default home view".
+        if (hasExtra(EXTRA_OPEN_VIEW)) {
+            val name = getStringExtra(EXTRA_OPEN_VIEW).orEmpty()
+            return WidgetNavRequest.OpenView(CalendarView.entries.firstOrNull { it.name == name })
+        }
+        val source = sourceViewOrNull()
+        val eventId = getLongExtra(EXTRA_EVENT_ID, -1L)
+        return when {
             // Launcher long-press "New event" shortcut. Static shortcut intents
             // can't carry typed extras, so the action alone signals create-on-today.
             action == ACTION_NEW_EVENT -> WidgetNavRequest.Create(null)
             getBooleanExtra(EXTRA_CREATE, false) ->
                 WidgetNavRequest.Create(getStringExtra(EXTRA_DATE_ISO))
-        getStringExtra(EXTRA_DATE_ISO) != null ->
-            WidgetNavRequest.OpenDate(getStringExtra(EXTRA_DATE_ISO)!!)
+            // A widget event tap carries both the occurrence and its source view;
+            // reminders (no source) fall through to [detailKeyOrNull] instead.
+            source != null && eventId != -1L -> WidgetNavRequest.OpenEvent(
+                eventId = eventId,
+                beginMillis = getLongExtra(EXTRA_BEGIN_MILLIS, 0L),
+                endMillis = getLongExtra(EXTRA_END_MILLIS, 0L),
+                source = source,
+            )
+            source != null && getStringExtra(EXTRA_DATE_ISO) != null ->
+                WidgetNavRequest.OpenDate(getStringExtra(EXTRA_DATE_ISO)!!, source)
             else -> null
         }
+    }
+
+    /** The view the launching widget represents, if any (see [EXTRA_SOURCE_VIEW]). */
+    private fun Intent.sourceViewOrNull(): CalendarView? =
+        getStringExtra(EXTRA_SOURCE_VIEW)
+            ?.let { name -> CalendarView.entries.firstOrNull { it.name == name } }
 
     private fun Intent.detailKeyOrNull(): LongArray? {
+        // A widget event tap (source present) is routed through [navRequestOrNull]
+        // so it can also set the base view; only sourceless reminder taps land here.
+        if (sourceViewOrNull() != null) return null
         val eventId = getLongExtra(EXTRA_EVENT_ID, -1L)
         if (eventId == -1L) return null
         return longArrayOf(
@@ -162,12 +294,24 @@ class MainActivity : AppCompatActivity() {
     }
 
     companion object {
+        // The calendar provider's authority/host. A date tap arrives as
+        // ACTION_VIEW on content://com.android.calendar/time/<epochMillis>.
+        private const val CALENDAR_PROVIDER_HOST = "com.android.calendar"
+
         private const val EXTRA_EVENT_ID = "de.jeanlucmakiola.calendula.extra.EVENT_ID"
         private const val EXTRA_BEGIN_MILLIS = "de.jeanlucmakiola.calendula.extra.BEGIN"
         private const val EXTRA_END_MILLIS = "de.jeanlucmakiola.calendula.extra.END"
         private const val EXTRA_DATE_ISO = "de.jeanlucmakiola.calendula.extra.DATE_ISO"
         private const val EXTRA_CREATE = "de.jeanlucmakiola.calendula.extra.CREATE"
 
+        // A widget header tap asking to open a top-level view (no date drill-in).
+        // Its value is the target [CalendarView] name, or "" for the default view.
+        private const val EXTRA_OPEN_VIEW = "de.jeanlucmakiola.calendula.extra.OPEN_VIEW"
+
+        // The [CalendarView] (by name) of the widget a launch came from. Roots the
+        // in-app back stack in that view; absent for non-widget launches (reminders).
+        private const val EXTRA_SOURCE_VIEW = "de.jeanlucmakiola.calendula.extra.SOURCE_VIEW"
+
         // Fired by the launcher long-press "New event" shortcut (res/xml/
         // shortcuts.xml hardcodes this string — keep the two in sync).
         const val ACTION_NEW_EVENT = "de.jeanlucmakiola.calendula.action.NEW_EVENT"
@@ -190,14 +334,35 @@ class MainActivity : AppCompatActivity() {
             addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
         }
 
-        /** Open the day view anchored on [date] (home-screen widgets). */
-        fun openDateIntent(context: Context, date: LocalDate): Intent =
+        /**
+         * Open the day view anchored on [date], drilled in over the launching
+         * widget's [source] view (home-screen widgets). Backing out of the day
+         * returns to [source], then to the default home view.
+         */
+        fun openDateIntent(context: Context, date: LocalDate, source: CalendarView): Intent =
             Intent(context, MainActivity::class.java).apply {
                 data = "calendula://date/$date".toUri()
                 putExtra(EXTRA_DATE_ISO, date.toString())
+                putExtra(EXTRA_SOURCE_VIEW, source.name)
                 addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
             }
 
+        /**
+         * Open one occurrence's detail from a widget event tap, rooting the back
+         * stack in the widget's [source] view. Same occurrence-key shape as
+         * [eventDetailIntent]; the [source] extra is what distinguishes a widget
+         * tap (sets the base view) from a reminder tap (leaves it untouched).
+         */
+        fun openEventIntent(
+            context: Context,
+            eventId: Long,
+            beginMillis: Long,
+            endMillis: Long,
+            source: CalendarView,
+        ): Intent = eventDetailIntent(context, eventId, beginMillis, endMillis).apply {
+            putExtra(EXTRA_SOURCE_VIEW, source.name)
+        }
+
         /** Open the create-event form prefilled for [date] (home-screen widgets). */
         fun openCreateIntent(context: Context, date: LocalDate): Intent =
             Intent(context, MainActivity::class.java).apply {
@@ -206,5 +371,19 @@ class MainActivity : AppCompatActivity() {
                 putExtra(EXTRA_DATE_ISO, date.toString())
                 addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
             }
+
+        /**
+         * Open the app on a top-level [view] with no date drill-in — a widget
+         * header tap. A null [view] opens the user's default home view (the agenda
+         * widget's "Upcoming" title); a concrete view roots there over the default
+         * home (the month widget's month/year title → [CalendarView.Month]). The
+         * per-view data URI keeps distinct headers' PendingIntents from collapsing.
+         */
+        fun openViewIntent(context: Context, view: CalendarView?): Intent =
+            Intent(context, MainActivity::class.java).apply {
+                data = "calendula://view/${view?.name ?: "default"}".toUri()
+                putExtra(EXTRA_OPEN_VIEW, view?.name ?: "")
+                addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            }
     }
 }

app/src/main/java/de/jeanlucmakiola/calendula/data/backup/AutoBackup.kt

@@ -0,0 +1,176 @@
+package de.jeanlucmakiola.calendula.data.backup
+
+import android.Manifest
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.content.Context
+import android.content.pm.PackageManager
+import android.os.Build
+import android.util.Log
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import androidx.core.content.ContextCompat
+import androidx.core.net.toUri
+import androidx.work.CoroutineWorker
+import androidx.work.ExistingPeriodicWorkPolicy
+import androidx.work.ExistingWorkPolicy
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.PeriodicWorkRequestBuilder
+import androidx.work.WorkManager
+import androidx.work.WorkerParameters
+import dagger.hilt.EntryPoint
+import dagger.hilt.InstallIn
+import dagger.hilt.android.EntryPointAccessors
+import dagger.hilt.components.SingletonComponent
+import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
+import de.jeanlucmakiola.calendula.data.ics.IcsExporter
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.domain.ics.IcsWriter
+import kotlinx.coroutines.flow.first
+import java.util.concurrent.TimeUnit
+import kotlin.time.Clock
+
+/**
+ * Schedules and runs the automatic periodic `.ics` backup of local calendars
+ * (issue #8). One-way export only — it mirrors the manual "Back up" into a
+ * user-chosen folder on an interval; it is not a sync. Stays INTERNET-free:
+ * everything is local provider reads + a local file write.
+ */
+object BackupScheduler {
+
+    private const val WORK_NAME = "auto-backup"
+    private const val WORK_NAME_NOW = "auto-backup-now"
+
+    /**
+     * Reconcile the scheduled work with the current settings: enqueue a unique
+     * periodic request when backup is on and a folder is set, otherwise cancel
+     * it. WorkManager persists the request across reboots on its own.
+     *
+     * The first run is delayed by one interval so it never overlaps an immediate
+     * [runNow] (two simultaneous writes would race and leave a "(1)" duplicate).
+     */
+    fun apply(context: Context, enabled: Boolean, intervalMinutes: Long, hasFolder: Boolean) {
+        val workManager = WorkManager.getInstance(context)
+        if (!enabled || !hasFolder) {
+            workManager.cancelUniqueWork(WORK_NAME)
+            // Also cancel any pending immediate run — otherwise a failing run-now
+            // keeps retrying after the user has turned backup off.
+            workManager.cancelUniqueWork(WORK_NAME_NOW)
+            return
+        }
+        // WorkManager's own floor is 15 min; the UI floors the user choice at 30.
+        val interval = intervalMinutes.coerceAtLeast(15L)
+        val request = PeriodicWorkRequestBuilder<BackupWorker>(interval, TimeUnit.MINUTES)
+            .setInitialDelay(interval, TimeUnit.MINUTES)
+            .build()
+        workManager.enqueueUniquePeriodicWork(
+            WORK_NAME,
+            ExistingPeriodicWorkPolicy.UPDATE,
+            request,
+        )
+    }
+
+    /**
+     * Run one export immediately (e.g. right after enabling or changing the
+     * folder) for instant feedback. Unique + REPLACE so rapid taps coalesce into
+     * a single run rather than racing each other.
+     */
+    fun runNow(context: Context) {
+        WorkManager.getInstance(context).enqueueUniqueWork(
+            WORK_NAME_NOW,
+            ExistingWorkPolicy.REPLACE,
+            OneTimeWorkRequestBuilder<BackupWorker>().build(),
+        )
+    }
+}
+
+/**
+ * Exports the local calendars to `calendula-backup.ics` in the configured folder,
+ * overwriting the previous file. Pulls its collaborators through a Hilt
+ * [EntryPoint] so it works under WorkManager's default (no-arg) worker factory —
+ * no custom factory / Application wiring needed. Records the outcome for the
+ * settings status line, and notifies after repeated failures.
+ */
+class BackupWorker(
+    appContext: Context,
+    params: WorkerParameters,
+) : CoroutineWorker(appContext, params) {
+
+    @EntryPoint
+    @InstallIn(SingletonComponent::class)
+    interface Deps {
+        fun settingsPrefs(): SettingsPrefs
+        fun repository(): CalendarRepository
+        fun exporter(): IcsExporter
+    }
+
+    override suspend fun doWork(): Result {
+        val deps = EntryPointAccessors.fromApplication(applicationContext, Deps::class.java)
+        val prefs = deps.settingsPrefs()
+        // Respect the toggle even for already-queued work: if backup was turned
+        // off, no-op (and don't retry) so a lingering run can't revive itself.
+        if (!prefs.autoBackupEnabled.first()) return Result.success()
+        val folder = prefs.autoBackupFolderUri.first()
+            ?: return Result.failure() // nothing to write to — leave scheduling to settings
+        val now = System.currentTimeMillis()
+        return try {
+            val events = deps.repository().exportEvents()
+            val content = IcsWriter().writeCalendar(events, Clock.System.now())
+            deps.exporter().writeToFolder(folder.toUri(), BACKUP_FILE_NAME, content)
+            prefs.recordAutoBackupRun(success = true, atMillis = now)
+            Result.success()
+        } catch (e: Exception) {
+            prefs.recordAutoBackupRun(success = false, atMillis = now)
+            if (prefs.autoBackupStatus.first().consecutiveFailures >= FAILURE_NOTIFY_THRESHOLD) {
+                notifyFailure(applicationContext)
+            }
+            Log.w(TAG, "Automatic backup failed", e)
+            Result.retry()
+        }
+    }
+
+    private fun notifyFailure(context: Context) {
+        val canPost = Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU ||
+            ContextCompat.checkSelfPermission(context, Manifest.permission.POST_NOTIFICATIONS) ==
+            PackageManager.PERMISSION_GRANTED
+        if (!canPost) return
+        val manager = NotificationManagerCompat.from(context)
+        manager.createNotificationChannel(
+            NotificationChannel(
+                CHANNEL_ID,
+                context.getString(R.string.backup_channel_name),
+                NotificationManager.IMPORTANCE_LOW,
+            ).apply { description = context.getString(R.string.backup_channel_description) },
+        )
+        val launch = context.packageManager.getLaunchIntentForPackage(context.packageName)
+        val tap = launch?.let {
+            PendingIntent.getActivity(
+                context, 0, it,
+                PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
+            )
+        }
+        val notification = NotificationCompat.Builder(context, CHANNEL_ID)
+            .setSmallIcon(R.drawable.ic_notification)
+            .setContentTitle(context.getString(R.string.backup_failed_title))
+            .setContentText(context.getString(R.string.backup_failed_text))
+            .setCategory(NotificationCompat.CATEGORY_ERROR)
+            .setAutoCancel(true)
+            .apply { tap?.let(::setContentIntent) }
+            .build()
+        try {
+            manager.notify(NOTIFICATION_ID, notification)
+        } catch (e: SecurityException) {
+            Log.w(TAG, "Could not post backup-failure notification", e)
+        }
+    }
+
+    companion object {
+        const val BACKUP_FILE_NAME = "calendula-backup.ics"
+        private const val FAILURE_NOTIFY_THRESHOLD = 2
+        private const val CHANNEL_ID = "backup"
+        private const val NOTIFICATION_ID = 2
+        private const val TAG = "BackupWorker"
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/AllDayReminderEncoding.kt

@@ -50,6 +50,27 @@ internal fun toProviderAllDayMinutes(
     return ((utcMidnight - fire) / MILLIS_PER_MINUTE).toInt()
 }
 
+/**
+ * The next date on or after [today] carrying [month]/[day] — the date to sample
+ * a yearly all-day reminder's UTC offset at. A managed birthday's DTSTART is an
+ * ancient anchor (1972 for year-less dates), a year whose timezone rules
+ * (pre-DST offsets) differ from today's; sampling the offset there skews every
+ * modern occurrence by hours. Sampling at the upcoming occurrence makes the
+ * stored offset correct for it and its neighbours (only ±1h DST drift remains,
+ * the inherent limit). Feb-29 skips forward to the next leap year.
+ */
+internal fun nextYearlyOccurrence(month: Int, day: Int, today: LocalDate): LocalDate {
+    var year = today.year
+    // A Feb-29 date is valid only every ~4 years; 8 tries always reaches one.
+    repeat(8) {
+        val candidate = runCatching { LocalDate.of(year, month, day) }.getOrNull()
+        if (candidate != null && !candidate.isBefore(today)) return candidate
+        year++
+    }
+    // Unreachable for real month/day inputs; fall back to the raw anchor.
+    return LocalDate.of(today.year, month, day)
+}
+
 /**
  * Recover the semantic whole-day lead time from a raw all-day reminder
  * [rawMinutes]. Keys off the **local date** of the encoded fire instant, so it

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarColorPalette.kt

@@ -0,0 +1,22 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+/**
+ * Google-Calendar-style palette; ARGB ints for a raw `CALENDAR_COLOR` /
+ * `EVENT_COLOR`. The named entries exist for callers that need one specific
+ * hue (the managed special-dates calendars), so they can't drift from the
+ * swatches offered in the colour picker.
+ */
+object CalendarColorPalette {
+    val Red = 0xFFD50000.toInt()
+    val Orange = 0xFFE67C00.toInt()
+    val Amber = 0xFFF6BF26.toInt()
+    val Green = 0xFF33B679.toInt()
+    val DarkGreen = 0xFF0B8043.toInt()
+    val Blue = 0xFF039BE5.toInt()
+    val Indigo = 0xFF3F51B5.toInt()
+    val Purple = 0xFF8E24AA.toInt()
+    val Graphite = 0xFF616161.toInt()
+
+    /** The full palette, in swatch-row order. */
+    val all: List<Int> = listOf(Red, Orange, Amber, Green, DarkGreen, Blue, Indigo, Purple, Graphite)
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarDataSource.kt

@@ -1,5 +1,7 @@
 package de.jeanlucmakiola.calendula.data.calendar
 
+import de.jeanlucmakiola.floret.time.toEpochMillis
+import de.jeanlucmakiola.floret.time.toKotlinInstantFromEpochMillis
 import android.Manifest
 import android.content.ContentResolver
 import android.content.ContentUris
@@ -16,17 +18,24 @@ import android.util.Log
 import androidx.core.content.ContextCompat
 import dagger.hilt.android.qualifiers.ApplicationContext
 import de.jeanlucmakiola.calendula.domain.Attendee
+import de.jeanlucmakiola.calendula.domain.AttendeeRelationship
+import de.jeanlucmakiola.calendula.domain.AttendeeType
 import de.jeanlucmakiola.calendula.domain.CalendarSource
+import de.jeanlucmakiola.calendula.domain.EventAttendee
 import de.jeanlucmakiola.calendula.domain.EventColorOption
 import de.jeanlucmakiola.calendula.domain.EventDetail
 import de.jeanlucmakiola.calendula.domain.EventForm
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.EventStatus
 import de.jeanlucmakiola.calendula.domain.Reminder
+import de.jeanlucmakiola.calendula.domain.contacts.MANAGED_UID_PREFIX
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
 import de.jeanlucmakiola.calendula.domain.ics.IcsEvent
 import de.jeanlucmakiola.calendula.domain.ics.ParsedIcsEvent
 import de.jeanlucmakiola.calendula.domain.rruleTruncatedAt
 import kotlinx.datetime.toJavaLocalDate
+import java.time.Instant
+import java.time.LocalDate
 import java.time.ZoneId
 import java.time.ZoneOffset
 import java.util.UUID
@@ -46,6 +55,14 @@ interface CalendarDataSource {
     fun instances(beginMillis: Long, endMillis: Long): List<EventInstance>
     fun eventDetail(eventId: Long): EventDetail?
 
+    /**
+     * Master/one-off events whose title, description or location contains
+     * [query] (case-insensitive), across all calendars, newest first. Reads the
+     * Events table directly so the search is unbounded in time; exception rows
+     * are excluded (see [SearchProjection]). [query] is assumed non-blank.
+     */
+    fun searchEvents(query: String): List<EventInstance>
+
     /**
      * The event-colour palette the calendar's account publishes
      * (`CalendarContract.Colors`, `TYPE_EVENT`), sorted by key. Empty when the
@@ -58,9 +75,11 @@ interface CalendarDataSource {
     /**
      * Every master/one-off event of the writable local calendars, mapped for a
      * whole-calendar `.ics` backup. Modified-occurrence and cancelled-exception
-     * rows are excluded (see [EventExportProjection]).
+     * rows are excluded (see [EventExportProjection]). When [calendarIds] is
+     * given, only those calendars are exported (still intersected with the
+     * eligible set); `null` exports every eligible calendar.
      */
-    fun exportableEvents(): List<IcsEvent>
+    fun exportableEvents(calendarIds: Set<Long>? = null): List<IcsEvent>
 
     /**
      * The non-empty `Events.UID_2445` values present in [calendarId] — used to
@@ -88,6 +107,55 @@ interface CalendarDataSource {
     /** Permanently delete a local calendar the app owns, with all its events. */
     fun deleteCalendar(id: Long)
 
+    /**
+     * Create a local calendar tagged as the special-dates mirror for [type]
+     * (a marker in `CAL_SYNC2`); returns its `Calendars._ID`. Otherwise a normal
+     * local calendar, so it inherits per-calendar colour/visibility/reminders.
+     */
+    fun createManagedCalendar(displayName: String, color: Int, type: SpecialDateType): Long
+
+    /**
+     * The app's special-dates calendars, found by their `CAL_SYNC2` marker.
+     * Lets the mirror re-adopt its calendars after the stored ids are lost, and
+     * detect when the user deleted one in system settings.
+     */
+    fun findManagedCalendars(): List<ManagedCalendarRow>
+
+    /**
+     * The managed events in [calendarId] (those carrying a `UID_2445`, not
+     * soft-deleted) as [ManagedEventRow]s — the existing side of the sync diff.
+     */
+    fun queryManagedEvents(calendarId: Long): List<ManagedEventRow>
+
+    /**
+     * Insert a managed event carrying the deterministic [uid] in `UID_2445`;
+     * seeds its reminder rows from [form] (never touched again by sync). Returns
+     * the new `Events._ID`. [allDayReminderTimeMinutes]: see [insertEvent].
+     */
+    fun insertManagedEvent(form: EventForm, uid: String, allDayReminderTimeMinutes: Int): Long
+
+    /**
+     * Overwrite exactly the given managed columns on [eventId] (keys are
+     * `CalendarContract.Events` columns; a null value clears the column). A
+     * bare, targeted update — it never reconciles reminders or attendees, so
+     * user-owned data on the event survives every sync. No-ops on an empty map.
+     */
+    fun updateManagedFields(eventId: Long, values: Map<String, Any?>)
+
+    /**
+     * Replace the reminders on **every managed** event in [calendarId] with
+     * [minutes] (all-day lead times), each encoded so it fires at
+     * [allDayReminderTimeMinutes] on its upcoming occurrence. Used by the
+     * special-dates section so a reminder change applies to existing events too,
+     * not just future ones — the managed calendars treat reminders as a
+     * calendar-level setting. Skips any non-managed (user) event in the calendar.
+     */
+    fun applyManagedCalendarReminders(
+        calendarId: Long,
+        allDayReminderTimeMinutes: Int,
+        minutes: List<Int>,
+    )
+
     /**
      * Insert a new event; returns the new `Events._ID`. [allDayReminderTimeMinutes]
      * (minutes from local midnight) is the wall-clock time all-day reminders
@@ -110,6 +178,25 @@ interface CalendarDataSource {
         allDayReminderTimeMinutes: Int,
     )
 
+    /**
+     * Move an event (for recurring events: the whole series, with its modified
+     * and cancelled occurrences) to [targetCalendarId], returning the new
+     * `Events._ID`. `CALENDAR_ID` is sync-adapter-owned and can't be updated in
+     * place, so this is copy+delete: the row is re-inserted on the target (its
+     * `UID_2445` preserved), its exceptions, reminders and editable guests
+     * replayed, the [original]→[updated] field edits applied, then the source
+     * deleted. The source is removed only once the copy fully succeeds; a failure
+     * before that rolls the new event back, leaving the original untouched.
+     * [allDayReminderTimeMinutes]: see [insertEvent].
+     */
+    fun moveEvent(
+        eventId: Long,
+        targetCalendarId: Long,
+        original: EventForm,
+        updated: EventForm,
+        allDayReminderTimeMinutes: Int,
+    ): Long
+
     /**
      * Change a single occurrence of a recurring event by inserting a
      * modified-occurrence exception at [beginMillis] (the occurrence's
@@ -283,6 +370,140 @@ class AndroidCalendarDataSource @Inject constructor(
         if (deleted == 0) throw WriteFailedException("delete calendar id=$id")
     }
 
+    override fun createManagedCalendar(displayName: String, color: Int, type: SpecialDateType): Long {
+        val name = displayName.trim().ifEmpty { Fallbacks.UNNAMED_CALENDAR }
+        val values = ContentValues().apply {
+            put(CalendarContract.Calendars.ACCOUNT_NAME, LOCAL_ACCOUNT_NAME)
+            put(CalendarContract.Calendars.ACCOUNT_TYPE, CalendarContract.ACCOUNT_TYPE_LOCAL)
+            put(CalendarContract.Calendars.OWNER_ACCOUNT, LOCAL_ACCOUNT_NAME)
+            put(CalendarContract.Calendars.NAME, name)
+            put(CalendarContract.Calendars.CALENDAR_DISPLAY_NAME, name)
+            put(CalendarContract.Calendars.CALENDAR_COLOR, color)
+            put(
+                CalendarContract.Calendars.CALENDAR_ACCESS_LEVEL,
+                CalendarContract.Calendars.CAL_ACCESS_OWNER,
+            )
+            put(CalendarContract.Calendars.VISIBLE, 1)
+            put(CalendarContract.Calendars.SYNC_EVENTS, 1)
+            // The marker that identifies this as our special-dates calendar,
+            // independent of the (user-editable) display name. CAL_SYNC1 already
+            // holds the description, so the marker lives in CAL_SYNC2.
+            put(MANAGED_MARKER_COLUMN, markerFor(type))
+        }
+        val uri = resolver.insert(localCalendarsUri(), values)
+            ?: throw WriteFailedException("create managed calendar")
+        return ContentUris.parseId(uri)
+    }
+
+    override fun findManagedCalendars(): List<ManagedCalendarRow> = resolver.query(
+        CalendarContract.Calendars.CONTENT_URI,
+        arrayOf(CalendarContract.Calendars._ID, MANAGED_MARKER_COLUMN),
+        "${CalendarContract.Calendars.ACCOUNT_TYPE} = ? AND " +
+            "${CalendarContract.Calendars.ACCOUNT_NAME} = ? AND " +
+            "$MANAGED_MARKER_COLUMN IS NOT NULL",
+        arrayOf(CalendarContract.ACCOUNT_TYPE_LOCAL, LOCAL_ACCOUNT_NAME),
+        null,
+    )?.use { c ->
+        buildList {
+            while (c.moveToNext()) {
+                val type = typeForMarker(c.getString(1)) ?: continue
+                add(ManagedCalendarRow(id = c.getLong(0), type = type))
+            }
+        }
+    } ?: emptyList()
+
+    override fun queryManagedEvents(calendarId: Long): List<ManagedEventRow> = resolver.query(
+        CalendarContract.Events.CONTENT_URI,
+        arrayOf(
+            CalendarContract.Events._ID,
+            CalendarContract.Events.UID_2445,
+            CalendarContract.Events.TITLE,
+            CalendarContract.Events.DTSTART,
+            CalendarContract.Events.RRULE,
+        ),
+        // Only our own mirror events (UID prefix), so a user event that somehow
+        // landed in this calendar (e.g. an .ics import) is never seen as
+        // "existing but not desired" and deleted by the diff.
+        "${CalendarContract.Events.CALENDAR_ID} = ? AND " +
+            "${CalendarContract.Events.DELETED} = 0 AND " +
+            "${CalendarContract.Events.UID_2445} LIKE ?",
+        arrayOf(calendarId.toString(), "$MANAGED_UID_PREFIX%"),
+        null,
+    )?.use { c ->
+        buildList {
+            while (c.moveToNext()) {
+                val uid = c.getString(1)?.takeIf { it.isNotEmpty() } ?: continue
+                add(
+                    ManagedEventRow(
+                        eventId = c.getLong(0),
+                        uid = uid,
+                        title = c.getString(2).orEmpty(),
+                        dtStartMillis = c.getLong(3),
+                        rrule = c.getString(4)?.takeIf { it.isNotEmpty() },
+                    ),
+                )
+            }
+        }
+    } ?: emptyList()
+
+    override fun insertManagedEvent(form: EventForm, uid: String, allDayReminderTimeMinutes: Int): Long {
+        // Deterministic UID = the reconciliation key. A re-sync reads it back
+        // (queryManagedEvents) and diffs on it, so a contact never doubles.
+        val times = form.toWriteTimes(ZoneId.systemDefault())
+        val values = buildEventInsertValues(form, uid, times)
+        val eventId = resolver.insert(CalendarContract.Events.CONTENT_URI, values.toContentValues())
+            ?.let(ContentUris::parseId)
+            ?: throw WriteFailedException("insert managed event into calendar id=${form.calendarId}")
+        // Seeded once, then never re-touched by sync — so a user who moves a
+        // birthday reminder keeps their change. Encoded against the upcoming
+        // occurrence, not the ancient DTSTART anchor (wrong timezone offset).
+        val anchor = Instant.ofEpochMilli(times.dtStartMillis).atZone(ZoneOffset.UTC).toLocalDate()
+        insertReminderRows(
+            eventId,
+            managedAllDayReminderMinutes(anchor, form.reminders, allDayReminderTimeMinutes),
+        )
+        return eventId
+    }
+
+    override fun updateManagedFields(eventId: Long, values: Map<String, Any?>) {
+        if (values.isEmpty()) return
+        val rows = resolver.update(
+            ContentUris.withAppendedId(CalendarContract.Events.CONTENT_URI, eventId),
+            values.toContentValues(),
+            null, null,
+        )
+        if (rows == 0) throw WriteFailedException("update managed event id=$eventId")
+    }
+
+    override fun applyManagedCalendarReminders(
+        calendarId: Long,
+        allDayReminderTimeMinutes: Int,
+        minutes: List<Int>,
+    ) {
+        resolver.query(
+            CalendarContract.Events.CONTENT_URI,
+            arrayOf(CalendarContract.Events._ID, CalendarContract.Events.DTSTART),
+            // Only our own mirror events, so a stray user event in this calendar
+            // isn't all-day-re-encoded or stripped of its own reminders.
+            "${CalendarContract.Events.CALENDAR_ID} = ? AND " +
+                "${CalendarContract.Events.DELETED} = 0 AND " +
+                "${CalendarContract.Events.UID_2445} LIKE ?",
+            arrayOf(calendarId.toString(), "$MANAGED_UID_PREFIX%"),
+            null,
+        )?.use { c ->
+            while (c.moveToNext()) {
+                val eventId = c.getLong(0)
+                // Managed events are all-day: DTSTART is a UTC midnight anchor.
+                val anchor = Instant.ofEpochMilli(c.getLong(1))
+                    .atZone(ZoneOffset.UTC).toLocalDate()
+                reconcileReminders(
+                    eventId,
+                    managedAllDayReminderMinutes(anchor, minutes, allDayReminderTimeMinutes),
+                )
+            }
+        }
+    }
+
     override fun instances(beginMillis: Long, endMillis: Long): List<EventInstance> {
         ensureObserversRegistered()
         val uri = CalendarContract.Instances.CONTENT_URI.buildUpon().apply {
@@ -297,6 +518,89 @@ class AndroidCalendarDataSource @Inject constructor(
         )?.use { c -> c.mapAllNotNull { CursorColumnReader(c).toEventInstance() } } ?: emptyList()
     }
 
+    override fun searchEvents(query: String): List<EventInstance> {
+        ensureObserversRegistered()
+        val trimmed = query.trim()
+        if (trimmed.isEmpty()) return emptyList()
+        // Escape the SQL LIKE wildcards so a literal % or _ in the query matches
+        // itself instead of acting as a wildcard.
+        val escaped = trimmed
+            .replace("\\", "\\\\")
+            .replace("%", "\\%")
+            .replace("_", "\\_")
+        val like = "%$escaped%"
+        val match = "${CalendarContract.Events.TITLE} LIKE ? ESCAPE '\\' OR " +
+            "${CalendarContract.Events.DESCRIPTION} LIKE ? ESCAPE '\\' OR " +
+            "${CalendarContract.Events.EVENT_LOCATION} LIKE ? ESCAPE '\\'"
+        val selection = "($match) AND " +
+            "${CalendarContract.Events.DELETED} = 0 AND " +
+            "${CalendarContract.Events.ORIGINAL_ID} IS NULL"
+        return resolver.query(
+            CalendarContract.Events.CONTENT_URI,
+            SearchProjection.COLUMNS,
+            selection,
+            arrayOf(like, like, like),
+            CalendarContract.Events.DTSTART + " DESC",
+        )?.use { c ->
+            val reader = CursorColumnReader(c)
+            val out = ArrayList<EventInstance>(c.count)
+            while (c.moveToNext()) {
+                val base = reader.toSearchResult() ?: continue
+                // A recurring master's DTSTART is the series start; show its
+                // nearest occurrence instead so the date is the one the user
+                // actually cares about (and sorting reflects it).
+                val recurring = !reader.getString(SearchProjection.IDX_RRULE).isNullOrEmpty() ||
+                    !reader.getString(SearchProjection.IDX_RDATE).isNullOrEmpty()
+                out += if (recurring) {
+                    nearestOccurrenceMillis(base.eventId)?.let { (begin, end) ->
+                        base.copy(
+                            start = begin.toKotlinInstantFromEpochMillis(),
+                            end = end.toKotlinInstantFromEpochMillis(),
+                        )
+                    } ?: base
+                } else {
+                    base
+                }
+            }
+            out
+        } ?: emptyList()
+    }
+
+    /**
+     * The occurrence of [eventId] nearest to now: the soonest upcoming one
+     * within [OCCURRENCE_WINDOW_MILLIS] ahead, else the most recent past one
+     * within the same window behind. Null when neither exists (e.g. a series
+     * that only starts further out than the window) — the caller then keeps the
+     * series-start DTSTART. Returns (begin, end) epoch millis.
+     */
+    private fun nearestOccurrenceMillis(eventId: Long): Pair<Long, Long>? {
+        val now = System.currentTimeMillis()
+        return occurrenceInWindow(eventId, now, now + OCCURRENCE_WINDOW_MILLIS, soonestFirst = true)
+            ?: occurrenceInWindow(eventId, now - OCCURRENCE_WINDOW_MILLIS, now, soonestFirst = false)
+    }
+
+    private fun occurrenceInWindow(
+        eventId: Long,
+        beginMillis: Long,
+        endMillis: Long,
+        soonestFirst: Boolean,
+    ): Pair<Long, Long>? {
+        val uri = CalendarContract.Instances.CONTENT_URI.buildUpon().apply {
+            ContentUris.appendId(this, beginMillis)
+            ContentUris.appendId(this, endMillis)
+        }.build()
+        val order = CalendarContract.Instances.BEGIN + if (soonestFirst) " ASC" else " DESC"
+        return resolver.query(
+            uri,
+            arrayOf(CalendarContract.Instances.BEGIN, CalendarContract.Instances.END),
+            "${CalendarContract.Instances.EVENT_ID} = ?",
+            arrayOf(eventId.toString()),
+            order,
+        )?.use { c ->
+            if (!c.moveToFirst()) null else c.getLong(0) to c.getLong(1)
+        }
+    }
+
     override fun eventDetail(eventId: Long): EventDetail? {
         val attendees = queryAttendees(eventId)
         val reminders = queryReminders(eventId)
@@ -332,12 +636,19 @@ class AndroidCalendarDataSource @Inject constructor(
             ?: emptyList()
     }
 
-    override fun exportableEvents(): List<IcsEvent> {
+    override fun exportableEvents(calendarIds: Set<Long>?): List<IcsEvent> {
         // Only the local calendars the app owns and can write — synced calendars
-        // already have a backup (their server). Map id → display name for the
+        // already have a backup (their server). Exclude the managed special-dates
+        // mirror calendars: their events are derived from contacts, not authored
+        // here, and re-materialise from the contact sync — backing them up would
+        // just duplicate them on restore. A non-null [calendarIds] narrows the
+        // export to the user's chosen subset. Map id → display name for the
         // X-CALENDULA-CALENDAR tag a restore uses to fan back out.
         val names = calendars()
-            .filter { it.isLocal && it.canModifyContents }
+            .filter {
+                it.isLocal && it.canModifyContents && !it.isManaged &&
+                    (calendarIds == null || it.id in calendarIds)
+            }
             .associate { it.id to it.displayName }
         if (names.isEmpty()) return emptyList()
 
@@ -483,35 +794,15 @@ class AndroidCalendarDataSource @Inject constructor(
             .distinct()
 
     override fun insertEvent(form: EventForm, allDayReminderTimeMinutes: Int): Long {
-        val times = form.toWriteTimes(ZoneId.systemDefault())
-        val values = ContentValues().apply {
-            put(
-                CalendarContract.Events.CALENDAR_ID,
-                requireNotNull(form.calendarId) { "EventForm.calendarId is required" },
-            )
         // A globally-unique UID so a later .ics backup/restore can identify
         // the event and not duplicate it on re-import (the provider leaves
         // this null for events it didn't sync). Older rows without one fall
         // back to a stable synthesised UID at export time (deriveIcsUid).
-            put(CalendarContract.Events.UID_2445, "${UUID.randomUUID()}@calendula")
-            put(CalendarContract.Events.TITLE, form.title.trim())
-            put(CalendarContract.Events.ALL_DAY, if (form.isAllDay) 1 else 0)
-            put(CalendarContract.Events.DTSTART, times.dtStartMillis)
-            // The provider's invariant: recurring rows carry RRULE+DURATION
-            // (and no DTEND), one-off rows carry DTEND.
-            if (form.rrule == null) {
-                put(CalendarContract.Events.DTEND, times.dtEndMillis)
-            } else {
-                put(CalendarContract.Events.RRULE, form.rrule)
-                put(CalendarContract.Events.DURATION, times.toRfc2445Duration(form.isAllDay))
-            }
-            put(CalendarContract.Events.EVENT_TIMEZONE, times.timezone)
-            put(CalendarContract.Events.AVAILABILITY, form.availability.toProviderValue())
-            put(CalendarContract.Events.ACCESS_LEVEL, form.accessLevel.toProviderValue())
-            form.location.trim().takeIf { it.isNotEmpty() }
-                ?.let { put(CalendarContract.Events.EVENT_LOCATION, it) }
-            form.description.trim().takeIf { it.isNotEmpty() }
-                ?.let { put(CalendarContract.Events.DESCRIPTION, it) }
+        val values = buildEventInsertValues(
+            form,
+            uid = "${UUID.randomUUID()}@calendula",
+            times = form.toWriteTimes(ZoneId.systemDefault()),
+        ).toContentValues().apply {
             // A null colour just leaves both columns unset (the event inherits
             // its calendar's colour), so only the key/raw cases are written.
             when {
@@ -523,10 +814,25 @@ class AndroidCalendarDataSource @Inject constructor(
         val uri = resolver.insert(CalendarContract.Events.CONTENT_URI, values)
             ?: throw WriteFailedException("insert event into calendar id=${form.calendarId}")
         val eventId = ContentUris.parseId(uri)
-        // Best effort (spec §8): the event exists at this point — a reminder
-        // that fails to attach is logged, not surfaced as a failed create.
-        encodedReminders(form, allDayReminderTimeMinutes)
-            .forEach { minutes ->
+        seedReminders(eventId, form, allDayReminderTimeMinutes)
+        // Guests are best-effort like reminders: a row that fails to attach is
+        // logged, not surfaced as a failed create. Calendula never sends an
+        // invitation — it only writes the rows; the backend decides delivery.
+        insertAttendees(eventId, form.attendees)
+        return eventId
+    }
+
+    /**
+     * Attach [form]'s reminders to a freshly inserted event. Best effort
+     * (spec §8): the event exists at this point — a reminder that fails to
+     * attach is logged, not surfaced as a failed create.
+     */
+    private fun seedReminders(eventId: Long, form: EventForm, allDayReminderTimeMinutes: Int) =
+        insertReminderRows(eventId, encodedReminders(form, allDayReminderTimeMinutes))
+
+    /** Insert one `METHOD_ALERT` reminder row per raw provider offset. */
+    private fun insertReminderRows(eventId: Long, encodedMinutes: List<Int>) {
+        encodedMinutes.forEach { minutes ->
             val reminder = ContentValues().apply {
                 put(CalendarContract.Reminders.EVENT_ID, eventId)
                 put(CalendarContract.Reminders.MINUTES, minutes)
@@ -536,7 +842,25 @@ class AndroidCalendarDataSource @Inject constructor(
                 Log.w(TAG, "Failed to attach reminder ($minutes min) to event $eventId")
             }
         }
-        return eventId
+    }
+
+    /**
+     * A managed all-day event's reminders, encoded so they fire at
+     * [allDayReminderTimeMinutes] on its **upcoming** occurrence. The event's
+     * DTSTART is an ancient recurrence anchor (see [nextYearlyOccurrence]); using
+     * it directly would sample a stale timezone offset, so the offset is sampled
+     * at the next occurrence of the anchor's month/day instead.
+     */
+    private fun managedAllDayReminderMinutes(
+        anchor: LocalDate,
+        reminders: List<Int>,
+        allDayReminderTimeMinutes: Int,
+    ): List<Int> {
+        val zone = ZoneId.systemDefault()
+        val onDate = nextYearlyOccurrence(anchor.monthValue, anchor.dayOfMonth, LocalDate.now(zone))
+        return reminders
+            .map { toProviderAllDayMinutes(it, onDate, zone, allDayReminderTimeMinutes) }
+            .distinct()
     }
 
     override fun updateEvent(
@@ -565,7 +889,197 @@ class AndroidCalendarDataSource @Inject constructor(
         if (updated.reminders.toSet() != original.reminders.toSet()) {
             reconcileReminders(eventId, encodedReminders(updated, allDayReminderTimeMinutes))
         }
+        // Same untouched-set guard for guests: only reconcile when the form's
+        // attendees actually changed, so unrelated edits never disturb the
+        // organizer/resource rows the form doesn't model.
+        if (updated.attendees.toSet() != original.attendees.toSet()) {
+            reconcileAttendees(eventId, updated.attendees)
         }
+    }
+
+    override fun moveEvent(
+        eventId: Long,
+        targetCalendarId: Long,
+        original: EventForm,
+        updated: EventForm,
+        allDayReminderTimeMinutes: Int,
+    ): Long {
+        // CALENDAR_ID can't be updated in place, so re-create the event on the
+        // target calendar and delete the source. Everything that identifies or
+        // hangs off the event is copied first; the source row is removed only
+        // once the copy (including its exceptions) is complete — a failure
+        // anywhere before that rolls the new event back, so the move is
+        // all-or-nothing and never leaves a half-copied duplicate.
+        val master = queryMoveMaster(eventId)
+            ?: throw WriteFailedException("read event to move id=$eventId")
+        // Keep the source UID so an .ics backup dedups and a sync adapter can
+        // recognise the moved event; mint one only if the source carried none.
+        val uid = master.uid?.takeIf { it.isNotEmpty() } ?: "${UUID.randomUUID()}@calendula"
+        val newEventId = resolver.insert(
+            CalendarContract.Events.CONTENT_URI,
+            buildMovedMasterValues(master.event, targetCalendarId, uid).toContentValues(),
+        )?.let(ContentUris::parseId)
+            ?: throw WriteFailedException("insert moved event into calendar id=$targetCalendarId")
+        try {
+            copyReminderRows(fromEventId = eventId, toEventId = newEventId)
+            insertAttendees(newEventId, editableAttendees(eventId))
+            copyExceptions(fromEventId = eventId, toEventId = newEventId)
+            // Apply the user's field edits exactly as a same-calendar "all
+            // events" save would: the moved master carries the source's values,
+            // so the dirty diff against [original] writes only what changed
+            // (including a time or rrule edit made in the same save).
+            updateEvent(newEventId, original, updated, allDayReminderTimeMinutes)
+        } catch (t: Throwable) {
+            // Undo the partial copy so a failed move leaves nothing behind; the
+            // source is still intact (it's deleted only past this point).
+            runCatching { deleteEvent(newEventId) }
+            throw t
+        }
+        deleteEvent(eventId)
+        return newEventId
+    }
+
+    /** The master row of the event to move, as a verbatim-insert snapshot. */
+    private fun queryMoveMaster(eventId: Long): MoveMaster? = resolver.query(
+        ContentUris.withAppendedId(CalendarContract.Events.CONTENT_URI, eventId),
+        MoveMasterProjection.COLUMNS,
+        null, null, null,
+    )?.use { c ->
+        if (!c.moveToFirst()) return@use null
+        val r = CursorColumnReader(c)
+        MoveMaster(
+            uid = r.getString(MoveMasterProjection.IDX_UID),
+            event = MasterEventSnapshot(
+                title = r.getString(MoveMasterProjection.IDX_TITLE).orEmpty(),
+                isAllDay = r.getInt(MoveMasterProjection.IDX_ALL_DAY) != 0,
+                dtStartMillis = r.getLong(MoveMasterProjection.IDX_DTSTART),
+                dtEndMillis = r.getLong(MoveMasterProjection.IDX_DTEND)
+                    .takeUnless { r.isNull(MoveMasterProjection.IDX_DTEND) },
+                duration = r.getString(MoveMasterProjection.IDX_DURATION),
+                rrule = r.getString(MoveMasterProjection.IDX_RRULE)?.takeIf { it.isNotBlank() },
+                rdate = r.getString(MoveMasterProjection.IDX_RDATE),
+                exdate = r.getString(MoveMasterProjection.IDX_EXDATE),
+                timezone = r.getString(MoveMasterProjection.IDX_EVENT_TIMEZONE),
+                availability = r.getInt(MoveMasterProjection.IDX_AVAILABILITY),
+                accessLevel = r.getInt(MoveMasterProjection.IDX_ACCESS_LEVEL),
+                status = r.getInt(MoveMasterProjection.IDX_STATUS)
+                    .takeUnless { r.isNull(MoveMasterProjection.IDX_STATUS) },
+                location = r.getString(MoveMasterProjection.IDX_LOCATION),
+                description = r.getString(MoveMasterProjection.IDX_DESCRIPTION),
+            ),
+        )
+    }
+
+    private data class MoveMaster(val uid: String?, val event: MasterEventSnapshot)
+
+    /** Copy every stored reminder row (raw offsets and method) onto [toEventId]. */
+    private fun copyReminderRows(fromEventId: Long, toEventId: Long) = resolver.query(
+        CalendarContract.Reminders.CONTENT_URI,
+        arrayOf(CalendarContract.Reminders.MINUTES, CalendarContract.Reminders.METHOD),
+        CalendarContract.Reminders.EVENT_ID + " = ?",
+        arrayOf(fromEventId.toString()),
+        null,
+    )?.use { c ->
+        while (c.moveToNext()) {
+            val values = ContentValues().apply {
+                put(CalendarContract.Reminders.EVENT_ID, toEventId)
+                put(CalendarContract.Reminders.MINUTES, c.getInt(0))
+                put(CalendarContract.Reminders.METHOD, c.getInt(1))
+            }
+            if (resolver.insert(CalendarContract.Reminders.CONTENT_URI, values) == null) {
+                Log.w(TAG, "Failed to copy a reminder to moved event $toEventId")
+            }
+        }
+    } ?: Unit
+
+    /**
+     * The event's editable guests as [EventAttendee]s — the rows the move
+     * re-creates. Mirrors the edit form's filter: the organizer and resource
+     * rows (backend-owned, not user-editable) and any without an email are
+     * dropped; the response status resets to "invited" on re-insert.
+     */
+    private fun editableAttendees(eventId: Long): List<EventAttendee> = queryAttendees(eventId)
+        .filter {
+            it.relationship != AttendeeRelationship.Organizer && it.type != AttendeeType.Resource
+        }
+        .mapNotNull { a ->
+            a.email?.takeIf { it.isNotBlank() }?.let { email ->
+                EventAttendee(email = email, name = a.name, optional = a.type == AttendeeType.Optional)
+            }
+        }
+
+    /**
+     * Replay every exception of the series [fromEventId] against the moved series
+     * [toEventId]. The copy preserved the recurrence skeleton, so each occurrence
+     * time still resolves: a cancelled occurrence is re-hidden with a cancelled
+     * exception, a modified one is re-inserted with its fields (then its reminders
+     * reconciled and editable guests copied). No-op for a non-recurring event.
+     */
+    private fun copyExceptions(fromEventId: Long, toEventId: Long) {
+        queryExceptionRows(fromEventId).forEach { ex ->
+            if (ex.isCancelled) {
+                val values = ContentValues().apply {
+                    put(CalendarContract.Events.ORIGINAL_INSTANCE_TIME, ex.originalInstanceMillis)
+                    put(CalendarContract.Events.STATUS, CalendarContract.Events.STATUS_CANCELED)
+                }
+                resolver.insert(
+                    ContentUris.withAppendedId(
+                        CalendarContract.Events.CONTENT_EXCEPTION_URI, toEventId,
+                    ),
+                    values,
+                ) ?: throw WriteFailedException("copy cancelled occurrence to event id=$toEventId")
+            } else {
+                val uri = resolver.insert(
+                    ContentUris.withAppendedId(
+                        CalendarContract.Events.CONTENT_EXCEPTION_URI, toEventId,
+                    ),
+                    buildCopiedExceptionValues(ex).toContentValues(),
+                ) ?: throw WriteFailedException("copy modified occurrence to event id=$toEventId")
+                val newExceptionId = ContentUris.parseId(uri)
+                // The provider may clone the parent's reminders onto the new
+                // exception; reconcile to the source exception's exact set so
+                // they neither double nor drop. Same DTSTART → same all-day
+                // encoding, so the stored offsets match directly.
+                reconcileReminders(
+                    newExceptionId,
+                    queryReminders(ex.exceptionEventId).map { it.minutes },
+                )
+                insertAttendees(newExceptionId, editableAttendees(ex.exceptionEventId))
+            }
+        }
+    }
+
+    /** The series' exception rows (modified + cancelled), oldest occurrence first. */
+    private fun queryExceptionRows(seriesEventId: Long): List<ExceptionRowSnapshot> = resolver.query(
+        CalendarContract.Events.CONTENT_URI,
+        ExceptionProjection.COLUMNS,
+        "${CalendarContract.Events.ORIGINAL_ID} = ? AND ${CalendarContract.Events.DELETED} = 0",
+        arrayOf(seriesEventId.toString()),
+        CalendarContract.Events.ORIGINAL_INSTANCE_TIME + " ASC",
+    )?.use { c ->
+        c.mapAll {
+            val r = CursorColumnReader(c)
+            val status = r.getInt(ExceptionProjection.IDX_STATUS)
+                .takeUnless { r.isNull(ExceptionProjection.IDX_STATUS) }
+            ExceptionRowSnapshot(
+                exceptionEventId = r.getLong(ExceptionProjection.IDX_ID),
+                originalInstanceMillis = r.getLong(ExceptionProjection.IDX_ORIGINAL_INSTANCE_TIME),
+                isCancelled = status == CalendarContract.Events.STATUS_CANCELED,
+                status = status,
+                title = r.getString(ExceptionProjection.IDX_TITLE).orEmpty(),
+                isAllDay = r.getInt(ExceptionProjection.IDX_ALL_DAY) != 0,
+                dtStartMillis = r.getLong(ExceptionProjection.IDX_DTSTART),
+                dtEndMillis = r.getLong(ExceptionProjection.IDX_DTEND)
+                    .takeUnless { r.isNull(ExceptionProjection.IDX_DTEND) },
+                duration = r.getString(ExceptionProjection.IDX_DURATION),
+                timezone = r.getString(ExceptionProjection.IDX_EVENT_TIMEZONE),
+                availability = r.getInt(ExceptionProjection.IDX_AVAILABILITY),
+                accessLevel = r.getInt(ExceptionProjection.IDX_ACCESS_LEVEL),
+                location = r.getString(ExceptionProjection.IDX_LOCATION),
+                description = r.getString(ExceptionProjection.IDX_DESCRIPTION),
+            )
+        }
+    } ?: emptyList()
 
     override fun updateOccurrence(
         eventId: Long,
@@ -587,6 +1101,7 @@ class AndroidCalendarDataSource @Inject constructor(
         // Whether the provider copied the parent's reminder rows is its
         // business — reconciling against the actual rows handles both ways.
         reconcileReminders(exceptionId, encodedReminders(form, allDayReminderTimeMinutes))
+        reconcileAttendees(exceptionId, form.attendees)
         return exceptionId
     }
 
@@ -720,6 +1235,135 @@ class AndroidCalendarDataSource @Inject constructor(
         }
     }
 
+    /** Normalised key an attendee is matched/deduped on (case-insensitive email). */
+    private fun EventAttendee.key(): String = email.trim().lowercase()
+
+    /** Distinct guests by email; blanks dropped (we key and write on the address). */
+    private fun List<EventAttendee>.distinctByEmail(): List<EventAttendee> {
+        val seen = HashSet<String>()
+        return filter { it.email.isNotBlank() && seen.add(it.key()) }
+    }
+
+    private fun attendeeValues(eventId: Long, attendee: EventAttendee): ContentValues =
+        ContentValues().apply {
+            put(CalendarContract.Attendees.EVENT_ID, eventId)
+            put(CalendarContract.Attendees.ATTENDEE_EMAIL, attendee.email.trim())
+            attendee.name.trim().takeIf { it.isNotEmpty() }
+                ?.let { put(CalendarContract.Attendees.ATTENDEE_NAME, it) }
+            // A plain guest — never the organizer (we don't fabricate scheduling
+            // identity; the backend owns that). Invited = awaiting their reply.
+            put(
+                CalendarContract.Attendees.ATTENDEE_RELATIONSHIP,
+                CalendarContract.Attendees.RELATIONSHIP_ATTENDEE,
+            )
+            put(CalendarContract.Attendees.ATTENDEE_TYPE, attendee.providerType())
+            put(
+                CalendarContract.Attendees.ATTENDEE_STATUS,
+                CalendarContract.Attendees.ATTENDEE_STATUS_INVITED,
+            )
+        }
+
+    private fun EventAttendee.providerType(): Int = if (optional) {
+        CalendarContract.Attendees.TYPE_OPTIONAL
+    } else {
+        CalendarContract.Attendees.TYPE_REQUIRED
+    }
+
+    /** Best-effort attendee inserts (like reminders); emails are never logged. */
+    private fun insertAttendees(eventId: Long, attendees: List<EventAttendee>) {
+        attendees.distinctByEmail().forEach { attendee ->
+            if (resolver.insert(
+                    CalendarContract.Attendees.CONTENT_URI,
+                    attendeeValues(eventId, attendee),
+                ) == null
+            ) {
+                Log.w(TAG, "Failed to attach a guest to event $eventId")
+            }
+        }
+    }
+
+    private data class AttendeeRow(
+        val id: Long,
+        val email: String,
+        val relationship: Int,
+        val type: Int,
+    ) {
+        val key: String get() = email.trim().lowercase()
+    }
+
+    private fun queryAttendeeRows(eventId: Long): List<AttendeeRow> = resolver.query(
+        CalendarContract.Attendees.CONTENT_URI,
+        arrayOf(
+            CalendarContract.Attendees._ID,
+            CalendarContract.Attendees.ATTENDEE_EMAIL,
+            CalendarContract.Attendees.ATTENDEE_RELATIONSHIP,
+            CalendarContract.Attendees.ATTENDEE_TYPE,
+        ),
+        CalendarContract.Attendees.EVENT_ID + " = ?",
+        arrayOf(eventId.toString()),
+        null,
+    )?.use { c ->
+        buildList {
+            while (c.moveToNext()) {
+                add(
+                    AttendeeRow(
+                        id = c.getLong(0),
+                        email = c.getString(1).orEmpty(),
+                        relationship = c.getInt(2),
+                        type = c.getInt(3),
+                    ),
+                )
+            }
+        }
+    } ?: emptyList()
+
+    /**
+     * Make the event's *editable* guest rows match [attendees]. Only rows we
+     * own — has an email, not the organizer, not a resource — are reconciled;
+     * everything else the backend put there is left untouched. Matched rows keep
+     * their response status (only the required/optional type is updated if it
+     * changed); dropped rows are deleted; new guests inserted. Calendula sends
+     * nothing — the backend decides if anyone is notified on sync.
+     */
+    private fun reconcileAttendees(eventId: Long, attendees: List<EventAttendee>) {
+        val target = attendees.distinctByEmail()
+        val targetByKey = target.associateBy { it.key() }
+        val editable = queryAttendeeRows(eventId).filter {
+            it.email.isNotBlank() &&
+                it.relationship != CalendarContract.Attendees.RELATIONSHIP_ORGANIZER &&
+                it.type != CalendarContract.Attendees.TYPE_RESOURCE
+        }
+        val editableKeys = editable.map { it.key }.toSet()
+        editable.forEach { row ->
+            val want = targetByKey[row.key]
+            if (want == null) {
+                resolver.delete(
+                    CalendarContract.Attendees.CONTENT_URI,
+                    CalendarContract.Attendees._ID + " = ?",
+                    arrayOf(row.id.toString()),
+                )
+            } else if (row.type != want.providerType()) {
+                resolver.update(
+                    CalendarContract.Attendees.CONTENT_URI,
+                    ContentValues().apply {
+                        put(CalendarContract.Attendees.ATTENDEE_TYPE, want.providerType())
+                    },
+                    CalendarContract.Attendees._ID + " = ?",
+                    arrayOf(row.id.toString()),
+                )
+            }
+        }
+        target.filterNot { it.key() in editableKeys }.forEach { attendee ->
+            if (resolver.insert(
+                    CalendarContract.Attendees.CONTENT_URI,
+                    attendeeValues(eventId, attendee),
+                ) == null
+            ) {
+                Log.w(TAG, "Failed to attach a guest to event $eventId")
+            }
+        }
+    }
+
     private fun Map<String, Any?>.toContentValues(): ContentValues =
         ContentValues().also { cv ->
             forEach { (column, value) ->
@@ -806,6 +1450,17 @@ class AndroidCalendarDataSource @Inject constructor(
         while (moveToNext()) mapper(this@mapAllNotNull)?.let(::add)
     }
 
+    /** The `CAL_SYNC2` marker value identifying a managed calendar's [type]. */
+    private fun markerFor(type: SpecialDateType): String = when (type) {
+        SpecialDateType.Birthday -> "$MANAGED_MARKER_PREFIX:birthday"
+        SpecialDateType.Anniversary -> "$MANAGED_MARKER_PREFIX:anniversary"
+        SpecialDateType.Custom -> "$MANAGED_MARKER_PREFIX:custom"
+    }
+
+    /** Inverse of [markerFor]; null for a value that isn't one of ours. */
+    private fun typeForMarker(marker: String?): SpecialDateType? =
+        SpecialDateType.entries.firstOrNull { markerFor(it) == marker }
+
     private companion object {
         const val TAG = "CalendarDataSource"
 
@@ -814,5 +1469,20 @@ class AndroidCalendarDataSource @Inject constructor(
          * together (by account) in the filter sheet and calendar manager.
          */
         const val LOCAL_ACCOUNT_NAME = "Calendula"
+
+        /**
+         * Column and namespace for the special-dates marker (shared with the
+         * calendar projection, which reads it into [CalendarSource.isManaged]).
+         * CAL_SYNC1 already holds the local-calendar description, so it uses CAL_SYNC2.
+         */
+        val MANAGED_MARKER_COLUMN: String = CalendarProjection.MANAGED_MARKER_COLUMN
+        const val MANAGED_MARKER_PREFIX = CalendarProjection.MANAGED_MARKER_PREFIX
+
+        /**
+         * How far ahead/behind a search looks for a recurring event's nearest
+         * occurrence (~2 years). Wide enough for everyday series; a series that
+         * next fires beyond it falls back to its series-start date.
+         */
+        const val OCCURRENCE_WINDOW_MILLIS = 2L * 365 * 24 * 60 * 60 * 1000
     }
 }

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarMapper.kt

@@ -24,5 +24,12 @@ internal fun ColumnReader.toCalendarSource(): CalendarSource {
         } else {
             null
         },
+        // A special-dates mirror calendar, recognised by its durable CAL_SYNC2
+        // marker (only meaningful on the local calendars the app owns). This is
+        // the source of truth for the editor lock — independent of any stored
+        // preference that a backup restore could have wiped.
+        isManaged = isLocal &&
+            getString(CalendarProjection.IDX_MANAGED_MARKER)
+                ?.startsWith(CalendarProjection.MANAGED_MARKER_PREFIX) == true,
     )
 }

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarRepository.kt

@@ -16,6 +16,13 @@ interface CalendarRepository {
     fun instances(range: ClosedRange<Instant>): Flow<List<EventInstance>>
     suspend fun eventDetail(eventId: Long): EventDetail
 
+    /**
+     * Events whose title, description or location contains [query], with hidden
+     * calendars removed and newest first. Empty when [query] is blank. Searches
+     * the whole history/future (see [CalendarDataSource.searchEvents]).
+     */
+    suspend fun searchEvents(query: String): List<EventInstance>
+
     /**
      * The event-colour palette a calendar's account publishes; empty when it
      * exposes none (see [CalendarDataSource.eventColorPalette]).
@@ -34,8 +41,9 @@ interface CalendarRepository {
     /**
      * Every event of the writable local calendars, ready to serialise into a
      * whole-calendar `.ics` backup (see [CalendarDataSource.exportableEvents]).
+     * [calendarIds] narrows the export to a chosen subset; `null` exports all.
      */
-    suspend fun exportEvents(): List<IcsEvent>
+    suspend fun exportEvents(calendarIds: Set<Long>? = null): List<IcsEvent>
 
     /**
      * Bulk-import parsed `.ics` [events] into [targetCalendarId]. Events whose
@@ -53,6 +61,20 @@ interface CalendarRepository {
      */
     suspend fun updateEvent(eventId: Long, original: EventForm, updated: EventForm)
 
+    /**
+     * Move an event (recurring: the whole series, with its exceptions) to
+     * [targetCalendarId] and apply the [original]→[updated] field edits; returns
+     * the new event's `Events._ID`. Copy+delete under the hood
+     * (see [CalendarDataSource.moveEvent]) — `CALENDAR_ID` can't be updated in
+     * place.
+     */
+    suspend fun moveEvent(
+        eventId: Long,
+        targetCalendarId: Long,
+        original: EventForm,
+        updated: EventForm,
+    ): Long
+
     /**
      * Change a single occurrence of a recurring event (exception row with the
      * form's values); returns the exception's `Events._ID`.

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarRepositoryImpl.kt

@@ -1,5 +1,6 @@
 package de.jeanlucmakiola.calendula.data.calendar
 
+import de.jeanlucmakiola.floret.time.toEpochMillis
 import de.jeanlucmakiola.calendula.data.di.IoDispatcher
 import de.jeanlucmakiola.calendula.data.prefs.CalendarPrefs
 import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
@@ -14,6 +15,7 @@ import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.flowOn
@@ -55,11 +57,12 @@ class CalendarRepositoryImpl @Inject constructor(
             .reQuery { dataSource.calendars() }
             .flowOn(io)
 
-    // Instances are filtered by the app-side hidden-calendar set (M3): an event
-    // is dropped whenever the user has hidden its calendar. Re-runs when the
-    // provider ticks *or* the hidden set changes — toggling a calendar in the
-    // filter sheet updates every view immediately. [calendars] stays unfiltered
-    // so the filter sheet can list and re-enable hidden calendars.
+    // Instances are filtered by the app-side hidden ∪ disabled calendar sets
+    // (M3): an event is dropped whenever the user has hidden *or* disabled its
+    // calendar. Re-runs when the provider ticks *or* either set changes —
+    // toggling a calendar in the filter sheet or the calendar manager updates
+    // every view immediately. [calendars] stays unfiltered so those screens can
+    // list and re-enable hidden/disabled calendars.
     override fun instances(range: ClosedRange<Instant>): Flow<List<EventInstance>> =
         combine(
             ticks
@@ -71,15 +74,29 @@ class CalendarRepositoryImpl @Inject constructor(
                     )
                 },
             prefs.hiddenCalendarIds,
-        ) { instances, hidden ->
-            if (hidden.isEmpty()) instances
-            else instances.filterNot { it.calendarId in hidden }
-        }.flowOn(io)
+            prefs.disabledCalendarIds,
+        ) { instances, hidden, disabled ->
+            val excluded = hidden + disabled
+            if (excluded.isEmpty()) instances
+            else instances.filterNot { it.calendarId in excluded }
+        }
+            // hidden and disabled both derive from one DataStore, so toggling
+            // either makes both re-emit and combine briefly surfaces the same
+            // list twice — collapse the duplicate so views don't re-render for it.
+            .distinctUntilChanged()
+            .flowOn(io)
 
     override suspend fun eventDetail(eventId: Long): EventDetail = withContext(io) {
         dataSource.eventDetail(eventId) ?: throw NoSuchEventException(eventId)
     }
 
+    override suspend fun searchEvents(query: String): List<EventInstance> = withContext(io) {
+        if (query.isBlank()) return@withContext emptyList()
+        val excluded = prefs.hiddenCalendarIds.first() + prefs.disabledCalendarIds.first()
+        dataSource.searchEvents(query)
+            .let { if (excluded.isEmpty()) it else it.filterNot { e -> e.calendarId in excluded } }
+    }
+
     override suspend fun eventColorPalette(calendarId: Long): List<EventColorOption> =
         withContext(io) { dataSource.eventColorPalette(calendarId) }
 
@@ -101,7 +118,8 @@ class CalendarRepositoryImpl @Inject constructor(
     override suspend fun deleteCalendar(id: Long) =
         withContext(io) { dataSource.deleteCalendar(id) }
 
-    override suspend fun exportEvents() = withContext(io) { dataSource.exportableEvents() }
+    override suspend fun exportEvents(calendarIds: Set<Long>?) =
+        withContext(io) { dataSource.exportableEvents(calendarIds) }
 
     override suspend fun importEvents(
         targetCalendarId: Long,
@@ -139,6 +157,17 @@ class CalendarRepositoryImpl @Inject constructor(
         dataSource.deleteEvent(eventId)
     }
 
+    override suspend fun moveEvent(
+        eventId: Long,
+        targetCalendarId: Long,
+        original: EventForm,
+        updated: EventForm,
+    ): Long = withContext(io) {
+        dataSource.moveEvent(
+            eventId, targetCalendarId, original, updated, allDayReminderTimeMinutes(),
+        )
+    }
+
     override suspend fun updateOccurrence(
         eventId: Long,
         beginMillis: Long,

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/EventDetailMapper.kt

@@ -1,5 +1,6 @@
 package de.jeanlucmakiola.calendula.data.calendar
 
+import de.jeanlucmakiola.floret.time.toKotlinInstantFromEpochMillis
 import android.provider.CalendarContract
 import android.util.Log
 import de.jeanlucmakiola.calendula.domain.AccessLevel
@@ -23,26 +24,29 @@ internal fun ColumnReader.toEventDetailCore(
     attendees: List<Attendee>,
     reminders: List<Reminder>,
 ): EventDetail? {
-    val begin = getLong(EventDetailProjection.IDX_DTSTART)
-
-    if (begin < 0L) {
-        Log.w(TAG, "Dropping event with negative dtstart=$begin")
+    // DTSTART is epoch millis in UTC, so a series anchored before 1970 (common
+    // for yearly birthdays/anniversaries synced over CalDAV) is legitimately
+    // negative — only an *absent* DTSTART marks a malformed row worth dropping.
+    // Dropping negatives made every occurrence of such a series un-openable
+    // (the detail loads the ancient series-master DTSTART), see issue #34.
+    if (isNull(EventDetailProjection.IDX_DTSTART)) {
+        Log.w(TAG, "Dropping event with missing dtstart")
         return null
     }
+    val begin = getLong(EventDetailProjection.IDX_DTSTART)
 
     // Recurring events store DURATION instead of DTEND, so the series row's
     // DTEND is null. Keep the event (end == begin); callers that opened a
     // specific occurrence supply the real per-occurrence times from
-    // CalendarContract.Instances. Only a present-but-backwards DTEND is malformed.
+    // CalendarContract.Instances. A present-but-backwards DTEND is malformed,
+    // but dropping the row would make the event un-openable — the same trap as
+    // the pre-1970 DTSTART bug above (issue #34): it would surface as the
+    // generic error screen with no way to open the event and fix it. Clamp to a
+    // zero-length event instead (matching SearchMapper's coerceAtLeast).
     val end = if (isNull(EventDetailProjection.IDX_DTEND)) {
         begin
     } else {
-        val rawEnd = getLong(EventDetailProjection.IDX_DTEND)
-        if (rawEnd < begin) {
-            Log.w(TAG, "Dropping event with dtend=$rawEnd < dtstart=$begin")
-            return null
-        }
-        rawEnd
+        getLong(EventDetailProjection.IDX_DTEND).coerceAtLeast(begin)
     }
 
     // Kept raw (no untitled fallback): the detail screen substitutes its own

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/EventWriteMapper.kt

@@ -43,10 +43,55 @@ internal fun EventForm.toWriteTimes(zone: ZoneId): EventWriteTimes = if (isAllDa
  * DURATION instead of DTEND when an RRULE is set): whole days for all-day
  * events, seconds otherwise.
  */
-internal fun EventWriteTimes.toRfc2445Duration(isAllDay: Boolean): String = if (isAllDay) {
-    "P${(dtEndMillis - dtStartMillis) / MILLIS_PER_DAY}D"
+internal fun EventWriteTimes.toRfc2445Duration(isAllDay: Boolean): String =
+    rfc2445Duration(dtEndMillis - dtStartMillis, isAllDay)
+
+/**
+ * RFC 2445 duration for a [spanMillis]-long event: whole days for all-day
+ * events (the provider's convention), seconds otherwise. Shared by the write
+ * paths that need a DURATION but start from a raw millisecond span (the series
+ * copy and exception replay of a calendar move) rather than [EventWriteTimes].
+ */
+internal fun rfc2445Duration(spanMillis: Long, isAllDay: Boolean): String = if (isAllDay) {
+    "P${spanMillis / MILLIS_PER_DAY}D"
 } else {
-    "P${(dtEndMillis - dtStartMillis) / 1_000L}S"
+    "P${spanMillis / 1_000L}S"
+}
+
+/**
+ * Column values for a brand-new Events row: identity, times (the provider's
+ * invariant — recurring rows carry RRULE+DURATION and no DTEND, one-off rows
+ * carry DTEND), availability/access level and trimmed optional text. Shared by
+ * the user-event and managed-event insert paths, which differ only in the
+ * [uid] they stamp; colour and attendees are user-event concerns the caller
+ * layers on top.
+ */
+internal fun buildEventInsertValues(
+    form: EventForm,
+    uid: String,
+    times: EventWriteTimes,
+): Map<String, Any?> = buildMap {
+    put(
+        CalendarContract.Events.CALENDAR_ID,
+        requireNotNull(form.calendarId) { "EventForm.calendarId is required" },
+    )
+    put(CalendarContract.Events.UID_2445, uid)
+    put(CalendarContract.Events.TITLE, form.title.trim())
+    put(CalendarContract.Events.ALL_DAY, if (form.isAllDay) 1 else 0)
+    put(CalendarContract.Events.DTSTART, times.dtStartMillis)
+    if (form.rrule == null) {
+        put(CalendarContract.Events.DTEND, times.dtEndMillis)
+    } else {
+        put(CalendarContract.Events.RRULE, form.rrule)
+        put(CalendarContract.Events.DURATION, times.toRfc2445Duration(form.isAllDay))
+    }
+    put(CalendarContract.Events.EVENT_TIMEZONE, times.timezone)
+    put(CalendarContract.Events.AVAILABILITY, form.availability.toProviderValue())
+    put(CalendarContract.Events.ACCESS_LEVEL, form.accessLevel.toProviderValue())
+    form.location.trim().takeIf { it.isNotEmpty() }
+        ?.let { put(CalendarContract.Events.EVENT_LOCATION, it) }
+    form.description.trim().takeIf { it.isNotEmpty() }
+        ?.let { put(CalendarContract.Events.DESCRIPTION, it) }
 }
 
 /**
@@ -118,8 +163,14 @@ internal fun buildEventUpdateValues(
  * provider clone the series row and apply these on top. Unlike the series
  * update there is no dirty check — the exception is a fresh row, so every
  * form-backed column is written (empty optionals as explicit NULLs, since the
- * clone starts from the parent's values). An exception is a single event:
- * DTEND, never RRULE/DURATION.
+ * clone starts from the parent's values).
+ *
+ * The occurrence's length travels as DURATION, never DTEND: the provider
+ * rejects DTEND on an exception outright (`CalendarProvider2`:
+ * "Exceptions can't overwrite dtend") and derives the instance end from
+ * DTSTART + DURATION itself, clearing the inherited RRULE in the process. This
+ * matches how AOSP Calendar/Etar write exceptions; sending DTEND is what made
+ * "only this event" fail on-device (Codeberg #16).
  */
 internal fun buildOccurrenceExceptionValues(
     form: EventForm,
@@ -131,7 +182,7 @@ internal fun buildOccurrenceExceptionValues(
     put(CalendarContract.Events.TITLE, form.title.trim())
     put(CalendarContract.Events.ALL_DAY, if (form.isAllDay) 1 else 0)
     put(CalendarContract.Events.DTSTART, times.dtStartMillis)
-    put(CalendarContract.Events.DTEND, times.dtEndMillis)
+    put(CalendarContract.Events.DURATION, times.toRfc2445Duration(form.isAllDay))
     put(CalendarContract.Events.EVENT_TIMEZONE, times.timezone)
     put(CalendarContract.Events.AVAILABILITY, form.availability.toProviderValue())
     put(CalendarContract.Events.ACCESS_LEVEL, form.accessLevel.toProviderValue())
@@ -140,6 +191,121 @@ internal fun buildOccurrenceExceptionValues(
     putAll(eventColorColumns(form.colorKey, form.color))
 }
 
+/**
+ * Raw provider snapshot of a master/one-off Events row, enough to re-insert it
+ * verbatim on another calendar (a calendar move is copy+delete — `CALENDAR_ID`
+ * is sync-adapter-owned and can't be updated in place). Recurring rows carry
+ * [rrule]/[duration] (and any [rdate]/[exdate]) with a null [dtEndMillis];
+ * one-off rows carry [dtEndMillis]. Colour is deliberately absent: a raw
+ * `EVENT_COLOR` or account-scoped `EVENT_COLOR_KEY` may be invalid on the target
+ * account, so the moved copy inherits the target calendar's colour instead.
+ */
+internal data class MasterEventSnapshot(
+    val title: String,
+    val isAllDay: Boolean,
+    val dtStartMillis: Long,
+    val dtEndMillis: Long?,
+    val duration: String?,
+    val rrule: String?,
+    val rdate: String?,
+    val exdate: String?,
+    val timezone: String?,
+    val availability: Int,
+    val accessLevel: Int,
+    val status: Int?,
+    val location: String?,
+    val description: String?,
+)
+
+/**
+ * Column values re-creating [snapshot] as a fresh Events row on
+ * [targetCalendarId], keeping its [uid] so `.ics` backup dedup and sync identity
+ * survive the move. Preserves the recurrence skeleton (DTSTART/RRULE/DURATION,
+ * RDATE/EXDATE) so the series' generated instances — and therefore the
+ * ORIGINAL_INSTANCE_TIME of every copied exception — line up unchanged. The
+ * caller layers the user's field edits on top with a normal series update.
+ */
+internal fun buildMovedMasterValues(
+    snapshot: MasterEventSnapshot,
+    targetCalendarId: Long,
+    uid: String,
+): Map<String, Any?> = buildMap {
+    put(CalendarContract.Events.CALENDAR_ID, targetCalendarId)
+    put(CalendarContract.Events.UID_2445, uid)
+    put(CalendarContract.Events.TITLE, snapshot.title)
+    put(CalendarContract.Events.ALL_DAY, if (snapshot.isAllDay) 1 else 0)
+    put(CalendarContract.Events.DTSTART, snapshot.dtStartMillis)
+    put(CalendarContract.Events.EVENT_TIMEZONE, snapshot.timezone ?: "UTC")
+    if (snapshot.rrule != null) {
+        put(CalendarContract.Events.RRULE, snapshot.rrule)
+        snapshot.rdate?.takeIf { it.isNotBlank() }?.let { put(CalendarContract.Events.RDATE, it) }
+        snapshot.exdate?.takeIf { it.isNotBlank() }?.let { put(CalendarContract.Events.EXDATE, it) }
+        put(CalendarContract.Events.DURATION, snapshot.movedDuration())
+    } else {
+        snapshot.dtEndMillis?.let { put(CalendarContract.Events.DTEND, it) }
+    }
+    put(CalendarContract.Events.AVAILABILITY, snapshot.availability)
+    put(CalendarContract.Events.ACCESS_LEVEL, snapshot.accessLevel)
+    snapshot.status?.let { put(CalendarContract.Events.STATUS, it) }
+    put(CalendarContract.Events.EVENT_LOCATION, snapshot.location?.ifEmpty { null })
+    put(CalendarContract.Events.DESCRIPTION, snapshot.description?.ifEmpty { null })
+}
+
+/** The recurring copy's DURATION: its own if present, else derived from DTEND. */
+private fun MasterEventSnapshot.movedDuration(): String = duration?.takeIf { it.isNotBlank() }
+    ?: rfc2445Duration((dtEndMillis ?: dtStartMillis) - dtStartMillis, isAllDay)
+
+/**
+ * Raw provider snapshot of one exception row of a recurring series (a modified
+ * or cancelled occurrence, `ORIGINAL_ID` = the series). [originalInstanceMillis]
+ * ties it to the occurrence it overrides; a [isCancelled] row only needs that.
+ */
+internal data class ExceptionRowSnapshot(
+    val exceptionEventId: Long,
+    val originalInstanceMillis: Long,
+    val isCancelled: Boolean,
+    val status: Int?,
+    val title: String,
+    val isAllDay: Boolean,
+    val dtStartMillis: Long,
+    val dtEndMillis: Long?,
+    val duration: String?,
+    val timezone: String?,
+    val availability: Int,
+    val accessLevel: Int,
+    val location: String?,
+    val description: String?,
+)
+
+/**
+ * Column values replaying a *modified* occurrence [snapshot] against the moved
+ * series via `CONTENT_EXCEPTION_URI`. Like [buildOccurrenceExceptionValues] the
+ * length travels as DURATION (the provider rejects DTEND on an exception). A
+ * cancelled occurrence is written separately (ORIGINAL_INSTANCE_TIME +
+ * STATUS_CANCELED) — this builder is only for the modified case.
+ */
+internal fun buildCopiedExceptionValues(snapshot: ExceptionRowSnapshot): Map<String, Any?> =
+    buildMap {
+        put(CalendarContract.Events.ORIGINAL_INSTANCE_TIME, snapshot.originalInstanceMillis)
+        put(CalendarContract.Events.TITLE, snapshot.title)
+        put(CalendarContract.Events.ALL_DAY, if (snapshot.isAllDay) 1 else 0)
+        put(CalendarContract.Events.DTSTART, snapshot.dtStartMillis)
+        put(
+            CalendarContract.Events.DURATION,
+            snapshot.duration?.takeIf { it.isNotBlank() }
+                ?: rfc2445Duration(
+                    (snapshot.dtEndMillis ?: snapshot.dtStartMillis) - snapshot.dtStartMillis,
+                    snapshot.isAllDay,
+                ),
+        )
+        put(CalendarContract.Events.EVENT_TIMEZONE, snapshot.timezone ?: "UTC")
+        put(CalendarContract.Events.AVAILABILITY, snapshot.availability)
+        put(CalendarContract.Events.ACCESS_LEVEL, snapshot.accessLevel)
+        put(CalendarContract.Events.EVENT_LOCATION, snapshot.location?.ifEmpty { null })
+        put(CalendarContract.Events.DESCRIPTION, snapshot.description?.ifEmpty { null })
+        snapshot.status?.let { put(CalendarContract.Events.STATUS, it) }
+    }
+
 /**
  * The `EVENT_COLOR` / `EVENT_COLOR_KEY` columns for a colour selection. A
  * [colorKey] writes the key alone (the provider derives `EVENT_COLOR` from the

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/IcsExportMapper.kt

@@ -1,5 +1,6 @@
 package de.jeanlucmakiola.calendula.data.calendar
 
+import de.jeanlucmakiola.floret.time.toKotlinInstantFromEpochMillis
 import de.jeanlucmakiola.calendula.domain.EventStatus
 import de.jeanlucmakiola.calendula.domain.ics.IcsEvent
 import de.jeanlucmakiola.calendula.domain.ics.deriveIcsUid

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/InstanceMapper.kt

@@ -1,5 +1,6 @@
 package de.jeanlucmakiola.calendula.data.calendar
 
+import de.jeanlucmakiola.floret.time.toKotlinInstantFromEpochMillis
 import android.util.Log
 import de.jeanlucmakiola.calendula.domain.EventInstance
 

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/ManagedCalendar.kt

@@ -0,0 +1,24 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
+
+/**
+ * One of the app's special-dates calendars, discovered by the marker stamped in
+ * its `CAL_SYNC2` column — so the mirror can re-adopt its calendars even if the
+ * stored ids in preferences were lost (e.g. an app-data wipe).
+ */
+data class ManagedCalendarRow(val id: Long, val type: SpecialDateType)
+
+/**
+ * A managed event as read back for the sync diff. [uid] is the deterministic
+ * `Events.UID_2445` (`contact-<type>:<lookupKey>@calendula`) the mirror keys on;
+ * [title], [dtStartMillis] and [rrule] are the managed columns compared against
+ * the desired state to decide whether a targeted update is needed.
+ */
+data class ManagedEventRow(
+    val eventId: Long,
+    val uid: String,
+    val title: String,
+    val dtStartMillis: Long,
+    val rrule: String?,
+)

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/Projections.kt

@@ -15,9 +15,17 @@ internal object CalendarProjection {
         // own we stash one in CAL_SYNC1 (synced rows put their sync token here,
         // so the mapper only reads it for local calendars).
         DESCRIPTION_COLUMN,
+        // The special-dates marker (CAL_SYNC2) — the durable identity the app
+        // uses to recognise its own managed calendars, independent of any
+        // stored preference id (which a backup restore / data wipe can lose).
+        MANAGED_MARKER_COLUMN,
     )
 
     const val DESCRIPTION_COLUMN: String = CalendarContract.Calendars.CAL_SYNC1
+    const val MANAGED_MARKER_COLUMN: String = CalendarContract.Calendars.CAL_SYNC2
+
+    /** Namespace prefix of every managed-calendar [MANAGED_MARKER_COLUMN] value. */
+    const val MANAGED_MARKER_PREFIX = "calendula.specialdates"
 
     const val IDX_ID = 0
     const val IDX_DISPLAY_NAME = 1
@@ -27,6 +35,7 @@ internal object CalendarProjection {
     const val IDX_VISIBLE = 5
     const val IDX_ACCESS_LEVEL = 6
     const val IDX_DESCRIPTION = 7
+    const val IDX_MANAGED_MARKER = 8
 }
 
 internal object InstanceProjection {
@@ -139,6 +148,124 @@ internal object EventExportProjection {
     const val IDX_CALENDAR_ID = 13
 }
 
+/**
+ * Master/one-off Events rows matched by a full-text search. Like
+ * [EventExportProjection] it reads the Events table directly (so the search is
+ * unbounded in time), carrying DURATION for recurring rows that have no DTEND.
+ * Colour folds the calendar fallback like [InstanceProjection].
+ */
+internal object SearchProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Events._ID,
+        CalendarContract.Events.CALENDAR_ID,
+        CalendarContract.Events.TITLE,
+        CalendarContract.Events.DTSTART,
+        CalendarContract.Events.DTEND,
+        CalendarContract.Events.DURATION,
+        CalendarContract.Events.ALL_DAY,
+        CalendarContract.Events.EVENT_COLOR,
+        CalendarContract.Events.CALENDAR_COLOR,
+        CalendarContract.Events.EVENT_LOCATION,
+        // Recurrence markers: a non-empty RRULE or RDATE means the result should
+        // display its nearest occurrence, not the series-start DTSTART.
+        CalendarContract.Events.RRULE,
+        CalendarContract.Events.RDATE,
+    )
+
+    const val IDX_ID = 0
+    const val IDX_CALENDAR_ID = 1
+    const val IDX_TITLE = 2
+    const val IDX_DTSTART = 3
+    const val IDX_DTEND = 4
+    const val IDX_DURATION = 5
+    const val IDX_ALL_DAY = 6
+    const val IDX_EVENT_COLOR = 7
+    const val IDX_CALENDAR_COLOR = 8
+    const val IDX_LOCATION = 9
+    const val IDX_RRULE = 10
+    const val IDX_RDATE = 11
+}
+
+/**
+ * The master/one-off Events row of an event about to be moved to another
+ * calendar, read for a verbatim re-insert (see [MasterEventSnapshot]). Carries
+ * the full recurrence skeleton (RRULE/DURATION, RDATE/EXDATE) so the moved copy
+ * generates the same instances, and `UID_2445` so identity survives the move.
+ */
+internal object MoveMasterProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Events.UID_2445,
+        CalendarContract.Events.TITLE,
+        CalendarContract.Events.DTSTART,
+        CalendarContract.Events.DTEND,
+        CalendarContract.Events.DURATION,
+        CalendarContract.Events.RRULE,
+        CalendarContract.Events.RDATE,
+        CalendarContract.Events.EXDATE,
+        CalendarContract.Events.EVENT_TIMEZONE,
+        CalendarContract.Events.ALL_DAY,
+        CalendarContract.Events.AVAILABILITY,
+        CalendarContract.Events.ACCESS_LEVEL,
+        CalendarContract.Events.STATUS,
+        CalendarContract.Events.EVENT_LOCATION,
+        CalendarContract.Events.DESCRIPTION,
+    )
+
+    const val IDX_UID = 0
+    const val IDX_TITLE = 1
+    const val IDX_DTSTART = 2
+    const val IDX_DTEND = 3
+    const val IDX_DURATION = 4
+    const val IDX_RRULE = 5
+    const val IDX_RDATE = 6
+    const val IDX_EXDATE = 7
+    const val IDX_EVENT_TIMEZONE = 8
+    const val IDX_ALL_DAY = 9
+    const val IDX_AVAILABILITY = 10
+    const val IDX_ACCESS_LEVEL = 11
+    const val IDX_STATUS = 12
+    const val IDX_LOCATION = 13
+    const val IDX_DESCRIPTION = 14
+}
+
+/**
+ * The exception rows of a recurring series (`ORIGINAL_ID` = the series), read to
+ * replay them against a moved copy (see [ExceptionRowSnapshot]). Both modified
+ * occurrences and cancellations (`STATUS_CANCELED`) are read; the query filters
+ * `DELETED = 0` so provider tombstones aren't replayed.
+ */
+internal object ExceptionProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Events._ID,
+        CalendarContract.Events.ORIGINAL_INSTANCE_TIME,
+        CalendarContract.Events.STATUS,
+        CalendarContract.Events.TITLE,
+        CalendarContract.Events.ALL_DAY,
+        CalendarContract.Events.DTSTART,
+        CalendarContract.Events.DTEND,
+        CalendarContract.Events.DURATION,
+        CalendarContract.Events.EVENT_TIMEZONE,
+        CalendarContract.Events.AVAILABILITY,
+        CalendarContract.Events.ACCESS_LEVEL,
+        CalendarContract.Events.EVENT_LOCATION,
+        CalendarContract.Events.DESCRIPTION,
+    )
+
+    const val IDX_ID = 0
+    const val IDX_ORIGINAL_INSTANCE_TIME = 1
+    const val IDX_STATUS = 2
+    const val IDX_TITLE = 3
+    const val IDX_ALL_DAY = 4
+    const val IDX_DTSTART = 5
+    const val IDX_DTEND = 6
+    const val IDX_DURATION = 7
+    const val IDX_EVENT_TIMEZONE = 8
+    const val IDX_AVAILABILITY = 9
+    const val IDX_ACCESS_LEVEL = 10
+    const val IDX_LOCATION = 11
+    const val IDX_DESCRIPTION = 12
+}
+
 internal object AttendeeProjection {
     val COLUMNS: Array<String> = arrayOf(
         CalendarContract.Attendees.ATTENDEE_NAME,

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/SearchMapper.kt

@@ -0,0 +1,44 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+import de.jeanlucmakiola.floret.time.toKotlinInstantFromEpochMillis
+import de.jeanlucmakiola.calendula.domain.EventInstance
+import de.jeanlucmakiola.calendula.domain.ics.parseRfc2445DurationMillis
+
+/**
+ * Map an Events-table row (a search hit) to an [EventInstance]. Unlike the
+ * Instances query this reads the series master, so there is no instance id (the
+ * event id stands in as the list key) and recurring rows carry DURATION instead
+ * of DTEND — reconstruct the end the same way the `.ics` export does.
+ */
+internal fun ColumnReader.toSearchResult(): EventInstance? {
+    // A pre-1970 series anchor is a legitimately negative epoch-millis DTSTART
+    // (see EventDetailMapper / issue #34); drop only a genuinely absent one, so
+    // long-running birthdays/anniversaries still surface in search.
+    if (isNull(SearchProjection.IDX_DTSTART)) return null
+    val dtStart = getLong(SearchProjection.IDX_DTSTART)
+    val end = when {
+        !isNull(SearchProjection.IDX_DTEND) -> getLong(SearchProjection.IDX_DTEND)
+        else -> dtStart + parseRfc2445DurationMillis(getString(SearchProjection.IDX_DURATION))
+    }.coerceAtLeast(dtStart)
+
+    val rawTitle = getString(SearchProjection.IDX_TITLE)
+    val title = if (rawTitle.isNullOrEmpty()) Fallbacks.UNTITLED_EVENT else rawTitle
+    val color = if (isNull(SearchProjection.IDX_EVENT_COLOR)) {
+        getInt(SearchProjection.IDX_CALENDAR_COLOR)
+    } else {
+        getInt(SearchProjection.IDX_EVENT_COLOR)
+    }
+    val eventId = getLong(SearchProjection.IDX_ID)
+
+    return EventInstance(
+        instanceId = eventId,
+        eventId = eventId,
+        calendarId = getLong(SearchProjection.IDX_CALENDAR_ID),
+        title = title,
+        start = dtStart.toKotlinInstantFromEpochMillis(),
+        end = end.toKotlinInstantFromEpochMillis(),
+        isAllDay = getInt(SearchProjection.IDX_ALL_DAY) != 0,
+        color = color,
+        location = getString(SearchProjection.IDX_LOCATION),
+    )
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/TimeBridge.kt

@@ -1,7 +0,0 @@
-package de.jeanlucmakiola.calendula.data.calendar
-
-import kotlin.time.Instant
-
-fun Long.toKotlinInstantFromEpochMillis(): Instant = Instant.fromEpochMilliseconds(this)
-
-fun Instant.toEpochMillis(): Long = toEpochMilliseconds()

app/src/main/java/de/jeanlucmakiola/calendula/data/contacts/AndroidSpecialDatesCalendarSpec.kt

@@ -0,0 +1,42 @@
+package de.jeanlucmakiola.calendula.data.contacts
+
+import android.content.Context
+import dagger.hilt.android.qualifiers.ApplicationContext
+import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.data.calendar.CalendarColorPalette
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Resolves the localized calendar names/templates and per-type colours the
+ * mirror creates its calendars with. The colours are picked from the shared
+ * palette so managed calendars look native alongside user calendars.
+ */
+@Singleton
+class AndroidSpecialDatesCalendarSpec @Inject constructor(
+    @ApplicationContext private val context: Context,
+) : SpecialDatesCalendarSpec {
+
+    override fun displayName(type: SpecialDateType): String = context.getString(
+        when (type) {
+            SpecialDateType.Birthday -> R.string.special_dates_calendar_birthday
+            SpecialDateType.Anniversary -> R.string.special_dates_calendar_anniversary
+            SpecialDateType.Custom -> R.string.special_dates_calendar_custom
+        },
+    )
+
+    override fun defaultTitleTemplate(type: SpecialDateType): String = context.getString(
+        when (type) {
+            SpecialDateType.Birthday -> R.string.special_dates_default_title_birthday
+            SpecialDateType.Anniversary -> R.string.special_dates_default_title_anniversary
+            SpecialDateType.Custom -> R.string.special_dates_default_title_custom
+        },
+    )
+
+    override fun color(type: SpecialDateType): Int = when (type) {
+        SpecialDateType.Birthday -> CalendarColorPalette.Purple
+        SpecialDateType.Anniversary -> CalendarColorPalette.Red
+        SpecialDateType.Custom -> CalendarColorPalette.Blue
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/contacts/ContactSpecialDatesDataSource.kt

@@ -0,0 +1,105 @@
+package de.jeanlucmakiola.calendula.data.contacts
+
+import android.Manifest
+import android.content.Context
+import android.content.pm.PackageManager
+import android.provider.ContactsContract
+import android.provider.ContactsContract.CommonDataKinds.Event
+import android.util.Log
+import androidx.core.content.ContextCompat
+import dagger.hilt.android.qualifiers.ApplicationContext
+import de.jeanlucmakiola.calendula.domain.contacts.ContactSpecialDate
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
+import de.jeanlucmakiola.calendula.domain.contacts.managedUid
+import de.jeanlucmakiola.calendula.domain.contacts.parseContactEventDate
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Reads the dated `Event` rows (birthdays, anniversaries, custom dates) of the
+ * device's contacts. Read-only and offline — the one-way source for the
+ * special-dates mirror. Requires `READ_CONTACTS`; returns an empty list when
+ * the permission is absent so the sync can degrade to a stalled state rather
+ * than crash.
+ */
+interface ContactSpecialDatesDataSource {
+    fun hasPermission(): Boolean
+
+    /** All usable contact special-dates, deduplicated per contact and type. */
+    fun readSpecialDates(): List<ContactSpecialDate>
+}
+
+/** Whether `READ_CONTACTS` is granted — the gate for every contacts read. */
+fun Context.hasContactsPermission(): Boolean =
+    ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) ==
+        PackageManager.PERMISSION_GRANTED
+
+/** Map a `ContactsContract` event `TYPE` to our calendar bucket. */
+internal fun specialDateTypeForRawEventType(type: Int): SpecialDateType = when (type) {
+    Event.TYPE_BIRTHDAY -> SpecialDateType.Birthday
+    Event.TYPE_ANNIVERSARY -> SpecialDateType.Anniversary
+    else -> SpecialDateType.Custom
+}
+
+@Singleton
+class AndroidContactSpecialDatesDataSource @Inject constructor(
+    @ApplicationContext private val context: Context,
+) : ContactSpecialDatesDataSource {
+
+    override fun hasPermission(): Boolean = context.hasContactsPermission()
+
+    override fun readSpecialDates(): List<ContactSpecialDate> {
+        if (!hasPermission()) return emptyList()
+        val resolver = context.contentResolver
+        // A contact can carry the same date more than once (multiple raw contacts
+        // under one aggregate); dedup on the mirror's reconciliation key so exact
+        // duplicates collapse while genuinely distinct dates (two custom events on
+        // one contact) are all kept. Ordered by Data._ID so which of two truly
+        // conflicting rows wins is stable across syncs (no event ping-pong).
+        val seen = HashSet<String>()
+        val result = ArrayList<ContactSpecialDate>()
+        runCatching {
+            resolver.query(
+                ContactsContract.Data.CONTENT_URI,
+                PROJECTION,
+                "${ContactsContract.Data.MIMETYPE} = ?",
+                arrayOf(Event.CONTENT_ITEM_TYPE),
+                "${ContactsContract.Data._ID} ASC",
+            )?.use { c ->
+                val idxDate = c.getColumnIndexOrThrow(Event.START_DATE)
+                val idxType = c.getColumnIndexOrThrow(Event.TYPE)
+                val idxLabel = c.getColumnIndexOrThrow(Event.LABEL)
+                val idxLookup = c.getColumnIndexOrThrow(ContactsContract.Data.LOOKUP_KEY)
+                val idxName = c.getColumnIndexOrThrow(ContactsContract.Data.DISPLAY_NAME_PRIMARY)
+                while (c.moveToNext()) {
+                    val lookup = c.getString(idxLookup)?.takeIf { it.isNotEmpty() } ?: continue
+                    val parts = parseContactEventDate(c.getString(idxDate)) ?: continue
+                    val type = specialDateTypeForRawEventType(c.getInt(idxType))
+                    val date = ContactSpecialDate(
+                        lookupKey = lookup,
+                        displayName = c.getString(idxName)?.trim().orEmpty(),
+                        type = type,
+                        month = parts.month,
+                        day = parts.day,
+                        year = parts.year,
+                        label = c.getString(idxLabel)?.takeIf { it.isNotBlank() },
+                    )
+                    if (seen.add(date.managedUid())) result += date
+                }
+            }
+        }.onFailure { Log.w(TAG, "Reading contact special-dates failed", it) }
+        return result
+    }
+
+    private companion object {
+        const val TAG = "ContactSpecialDates"
+
+        val PROJECTION = arrayOf(
+            ContactsContract.Data.LOOKUP_KEY,
+            ContactsContract.Data.DISPLAY_NAME_PRIMARY,
+            Event.START_DATE,
+            Event.TYPE,
+            Event.LABEL,
+        )
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/contacts/SpecialDatesScheduler.kt

@@ -0,0 +1,135 @@
+package de.jeanlucmakiola.calendula.data.contacts
+
+import android.content.Context
+import android.util.Log
+import androidx.work.CoroutineWorker
+import androidx.work.Data
+import androidx.work.ExistingPeriodicWorkPolicy
+import androidx.work.ExistingWorkPolicy
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.PeriodicWorkRequestBuilder
+import androidx.work.WorkManager
+import androidx.work.WorkerParameters
+import dagger.hilt.EntryPoint
+import dagger.hilt.InstallIn
+import dagger.hilt.android.EntryPointAccessors
+import dagger.hilt.components.SingletonComponent
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.data.prefs.SpecialDatesStalledReason
+import kotlinx.coroutines.flow.first
+import java.util.concurrent.TimeUnit
+
+/**
+ * Schedules the contact special-dates mirror. Birthdays change rarely, so this
+ * is deliberately cheap: a **daily** periodic reconcile, plus an immediate run
+ * on enable / "Sync now" and a debounced one when the app is foregrounded. No
+ * ContentObserver — it would need the process alive and buys almost nothing for
+ * once-a-year events. Everything stays offline (local contacts → local calendar).
+ */
+object SpecialDatesScheduler {
+
+    private const val WORK_NAME = "special-dates-sync"
+    private const val WORK_NAME_NOW = "special-dates-sync-now"
+    private const val WORK_NAME_FOREGROUND = "special-dates-sync-foreground"
+    private const val KEY_FOREGROUND = "foreground"
+
+    /** Enqueue (or cancel) the daily periodic reconcile to match [enabled]. */
+    fun apply(context: Context, enabled: Boolean) {
+        val workManager = WorkManager.getInstance(context)
+        if (!enabled) {
+            workManager.cancelUniqueWork(WORK_NAME)
+            workManager.cancelUniqueWork(WORK_NAME_NOW)
+            workManager.cancelUniqueWork(WORK_NAME_FOREGROUND)
+            return
+        }
+        val request = PeriodicWorkRequestBuilder<SpecialDatesSyncWorker>(1, TimeUnit.DAYS)
+            // Delay the first periodic run so it never overlaps an immediate run.
+            .setInitialDelay(1, TimeUnit.DAYS)
+            .build()
+        workManager.enqueueUniquePeriodicWork(WORK_NAME, ExistingPeriodicWorkPolicy.UPDATE, request)
+    }
+
+    /**
+     * Run one reconcile immediately. [foreground] runs (the app resuming) are
+     * debounced inside the worker and use their own work name, so a frequent
+     * foreground resync can never REPLACE — and swallow — a pending enable /
+     * "Sync now" run, which always syncs. The engine serializes the two if they
+     * overlap.
+     */
+    fun runNow(context: Context, foreground: Boolean = false) {
+        val request = OneTimeWorkRequestBuilder<SpecialDatesSyncWorker>()
+            .setInputData(Data.Builder().putBoolean(KEY_FOREGROUND, foreground).build())
+            .build()
+        val name = if (foreground) WORK_NAME_FOREGROUND else WORK_NAME_NOW
+        WorkManager.getInstance(context)
+            .enqueueUniqueWork(name, ExistingWorkPolicy.REPLACE, request)
+    }
+
+    internal const val INPUT_FOREGROUND = KEY_FOREGROUND
+}
+
+/**
+ * Runs the [SpecialDatesSyncEngine]. Pulls its collaborators through a Hilt
+ * [EntryPoint] so it works under WorkManager's default worker factory. Records
+ * the run for the settings status line; a missing permission parks the feature
+ * in a stalled state (surfaced in settings) rather than retrying forever.
+ */
+class SpecialDatesSyncWorker(
+    appContext: Context,
+    params: WorkerParameters,
+) : CoroutineWorker(appContext, params) {
+
+    @EntryPoint
+    @InstallIn(SingletonComponent::class)
+    interface Deps {
+        fun settingsPrefs(): SettingsPrefs
+        fun syncEngine(): SpecialDatesSyncEngine
+    }
+
+    override suspend fun doWork(): Result {
+        val deps = EntryPointAccessors.fromApplication(applicationContext, Deps::class.java)
+        val prefs = deps.settingsPrefs()
+
+        val now = System.currentTimeMillis()
+        // A foreground resume can fire often — skip if we synced recently.
+        val foreground = inputData.getBoolean(SpecialDatesScheduler.INPUT_FOREGROUND, false)
+        if (foreground && now - prefs.specialDatesLastForegroundSync.first() < FOREGROUND_DEBOUNCE_MILLIS) {
+            return Result.success()
+        }
+
+        return try {
+            when (val result = deps.syncEngine().sync()) {
+                // The engine re-checks the toggle, so already-queued work never
+                // revives a disabled feature; don't record a run either.
+                SpecialDatesSyncResult.Disabled -> return Result.success()
+                else -> {
+                    val stalled = if (result == SpecialDatesSyncResult.PermissionMissing) {
+                        SpecialDatesStalledReason.PermissionRevoked
+                    } else {
+                        null
+                    }
+                    prefs.recordSpecialDatesRun(now, stalled)
+                }
+            }
+            if (foreground) prefs.setSpecialDatesLastForegroundSync(now)
+            Result.success()
+        } catch (e: SecurityException) {
+            // A revoked calendar/contacts permission won't fix itself on retry —
+            // park the feature in a stalled state (surfaced in settings) instead
+            // of retrying with backoff forever.
+            Log.w(TAG, "Special-dates sync lacks a required permission", e)
+            prefs.recordSpecialDatesRun(now, SpecialDatesStalledReason.PermissionRevoked)
+            Result.success()
+        } catch (e: Exception) {
+            Log.w(TAG, "Special-dates sync failed", e)
+            Result.retry()
+        }
+    }
+
+    companion object {
+        private const val TAG = "SpecialDatesSync"
+
+        /** Skip a foreground-triggered sync if one ran within this window (4h). */
+        private const val FOREGROUND_DEBOUNCE_MILLIS = 4L * 60 * 60 * 1000
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/contacts/SpecialDatesSyncEngine.kt

@@ -0,0 +1,304 @@
+package de.jeanlucmakiola.calendula.data.contacts
+
+import android.provider.CalendarContract
+import de.jeanlucmakiola.calendula.data.calendar.CalendarDataSource
+import de.jeanlucmakiola.calendula.data.calendar.ManagedEventRow
+import de.jeanlucmakiola.calendula.data.calendar.toWriteTimes
+import de.jeanlucmakiola.floret.reminders.ReminderOverride
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.domain.Availability
+import de.jeanlucmakiola.calendula.domain.EventForm
+import de.jeanlucmakiola.calendula.domain.RecurrenceFreq
+import de.jeanlucmakiola.calendula.domain.SimpleRecurrence
+import de.jeanlucmakiola.calendula.domain.contacts.ContactSpecialDate
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
+import de.jeanlucmakiola.calendula.domain.contacts.anchorDate
+import de.jeanlucmakiola.calendula.domain.contacts.managedUid
+import de.jeanlucmakiola.calendula.domain.contacts.renderSpecialDateTitle
+import de.jeanlucmakiola.calendula.domain.toRRule
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import kotlinx.datetime.LocalDateTime
+import kotlinx.datetime.LocalTime
+import java.time.ZoneId
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/** Outcome of one mirror reconcile, reported back so the worker can record status. */
+enum class SpecialDatesSyncResult { Success, Disabled, PermissionMissing }
+
+/**
+ * Localized, per-type presentation the engine needs but can't derive purely
+ * (calendar display name, colour, and the default title template). Kept behind
+ * an interface so the engine's diff stays unit-testable without Android
+ * resources.
+ */
+interface SpecialDatesCalendarSpec {
+    fun displayName(type: SpecialDateType): String
+    fun color(type: SpecialDateType): Int
+    fun defaultTitleTemplate(type: SpecialDateType): String
+}
+
+/**
+ * The stored title template for [type], falling back to the localized default
+ * when blank/absent — the one resolution rule shared by the sync (what gets
+ * written) and the settings editor (what gets shown).
+ */
+fun SpecialDatesCalendarSpec.resolveTitleTemplate(
+    type: SpecialDateType,
+    stored: Map<SpecialDateType, String>,
+): String = stored[type]?.takeIf { it.isNotBlank() } ?: defaultTitleTemplate(type)
+
+/**
+ * Mirrors contact birthdays/anniversaries/custom dates into local calendars,
+ * one per type. Every reconcile is an idempotent diff keyed on the deterministic
+ * `UID_2445` ([managedEventUid]): new contacts are inserted (seeding user-owned
+ * fields once), changed contacts get a *targeted* managed-column update, and
+ * removed contacts are deleted — so a user's own edits (reminders, location,
+ * notes) are never clobbered. See docs/design/contact-special-dates.md.
+ */
+@Singleton
+class SpecialDatesSyncEngine @Inject constructor(
+    private val contacts: ContactSpecialDatesDataSource,
+    private val calendars: CalendarDataSource,
+    private val prefs: SettingsPrefs,
+    private val spec: SpecialDatesCalendarSpec,
+) {
+
+    // Serializes calendar-lifecycle work: two overlapping syncs (the daily job
+    // racing a "Sync now"/foreground run) would each see no managed calendar and
+    // both create one; a teardown racing an in-flight sync would delete calendars
+    // the sync then recreates. Holding this for the whole of sync()/teardown()
+    // makes those check-then-act sequences atomic, and — because sync() re-reads
+    // the enabled flag inside the lock — a teardown always wins the race.
+    private val lifecycleMutex = Mutex()
+
+    /**
+     * Reconcile every enabled type against the device's contacts. Returns why it
+     * stopped early (disabled / permission gone) or [SpecialDatesSyncResult.Success].
+     */
+    suspend fun sync(): SpecialDatesSyncResult = lifecycleMutex.withLock {
+        if (!prefs.specialDatesEnabled.first()) return SpecialDatesSyncResult.Disabled
+        if (!contacts.hasPermission()) return SpecialDatesSyncResult.PermissionMissing
+
+        val enabledTypes = prefs.specialDatesTypes.first()
+        val calendarByType = reconcileCalendars(enabledTypes)
+
+        val desiredByType = contacts.readSpecialDates().groupBy { it.type }
+        val reminderCtx = readReminderContext()
+        val templates = prefs.specialDatesTitleTemplates.first()
+        val showYear = prefs.specialDatesShowYear.first()
+
+        calendarByType.forEach { (type, calendarId) ->
+            val template = spec.resolveTitleTemplate(type, templates)
+            syncType(
+                calendarId = calendarId,
+                type = type,
+                contactsOfType = desiredByType[type].orEmpty(),
+                template = template,
+                showYear = showYear,
+                reminderCtx = reminderCtx,
+            )
+        }
+        SpecialDatesSyncResult.Success
+    }
+
+    /**
+     * Set the reminder default for a type's managed calendar and apply it to
+     * **all** its existing events too (not just future ones) — for managed
+     * calendars the reminder is a calendar-level setting. Persists the per-calendar
+     * all-day override so new events keep matching. No-op if the calendar for
+     * [type] doesn't exist yet.
+     */
+    suspend fun applyReminders(type: SpecialDateType, override: ReminderOverride) {
+        val calendarId = prefs.specialDatesCalendars.first()[type] ?: return
+        prefs.setCalendarAllDayReminderOverride(calendarId, override)
+        val minutes = when (override) {
+            ReminderOverride.Inherit -> prefs.defaultAllDayReminderMinutes.first()
+            ReminderOverride.None -> emptyList()
+            is ReminderOverride.Minutes -> override.minutes
+        }
+        calendars.applyManagedCalendarReminders(
+            calendarId = calendarId,
+            allDayReminderTimeMinutes = prefs.allDayReminderTimeMinutes.first(),
+            minutes = minutes,
+        )
+    }
+
+    /** Delete every managed calendar and forget its id — used when the feature is turned off. */
+    suspend fun teardown() = lifecycleMutex.withLock {
+        calendars.findManagedCalendars().forEach { calendars.deleteCalendar(it.id) }
+        SpecialDateType.entries.forEach { prefs.setSpecialDatesCalendarId(it, null) }
+    }
+
+    /**
+     * Ensure each enabled type has exactly one managed calendar (adopting an
+     * existing one, or the stored id if it still exists, else creating one) and
+     * that disabled types have none. Returns the calendar id per enabled type.
+     */
+    private suspend fun reconcileCalendars(enabledTypes: Set<SpecialDateType>): Map<SpecialDateType, Long> {
+        val foundByType = calendars.findManagedCalendars()
+            .groupBy({ it.type }, { it.id })
+            .mapValues { it.value.first() }
+        val stored = prefs.specialDatesCalendars.first()
+        val result = LinkedHashMap<SpecialDateType, Long>()
+        for (type in SpecialDateType.entries) {
+            // A stored id counts only if the calendar still exists (the user may
+            // have deleted it in system settings); otherwise adopt a found one.
+            val existingId = stored[type]?.takeIf { id -> foundByType.containsValue(id) }
+                ?: foundByType[type]
+            if (type in enabledTypes) {
+                val id = existingId ?: createCalendar(type)
+                if (stored[type] != id) prefs.setSpecialDatesCalendarId(type, id)
+                result[type] = id
+            } else {
+                if (existingId != null) calendars.deleteCalendar(existingId)
+                if (stored.containsKey(type)) prefs.setSpecialDatesCalendarId(type, null)
+            }
+        }
+        return result
+    }
+
+    private suspend fun createCalendar(type: SpecialDateType): Long {
+        // reconcileCalendars persists the id — the single place ids are recorded.
+        val id = calendars.createManagedCalendar(spec.displayName(type), spec.color(type), type)
+        // Seed a useful all-day reminder default (on the day + a week before), so
+        // birthdays get lead time out of the box. Per-calendar, user-adjustable —
+        // only set when the user hasn't already configured this calendar.
+        if (!prefs.perCalendarAllDayReminderOverride.first().containsKey(id)) {
+            prefs.setCalendarAllDayReminderOverride(
+                id,
+                ReminderOverride.Minutes(DEFAULT_REMINDER_MINUTES),
+            )
+        }
+        return id
+    }
+
+    private suspend fun syncType(
+        calendarId: Long,
+        type: SpecialDateType,
+        contactsOfType: List<ContactSpecialDate>,
+        template: String,
+        showYear: Boolean,
+        reminderCtx: ReminderContext,
+    ) {
+        val built = contactsOfType.map { sd ->
+            buildManagedEvent(calendarId, type, sd, template, showYear, reminderCtx)
+        }
+        val diff = diffManagedEvents(built.map { it.desired }, calendars.queryManagedEvents(calendarId))
+        val formByUid = built.associate { it.desired.uid to it.form }
+        diff.insertUids.forEach { uid ->
+            calendars.insertManagedEvent(formByUid.getValue(uid), uid, reminderCtx.allDayTimeMinutes)
+        }
+        diff.updates.forEach { calendars.updateManagedFields(it.eventId, it.columns) }
+        diff.deleteEventIds.forEach { calendars.deleteEvent(it) }
+    }
+
+    private fun buildManagedEvent(
+        calendarId: Long,
+        type: SpecialDateType,
+        sd: ContactSpecialDate,
+        template: String,
+        showYear: Boolean,
+        reminderCtx: ReminderContext,
+    ): BuiltManagedEvent {
+        val anchor = sd.anchorDate()
+        val start = LocalDateTime(anchor, LocalTime(0, 0))
+        // The source year is static and correct on every occurrence (unlike age).
+        val year = if (showYear) sd.year else null
+        val title = renderSpecialDateTitle(template, sd.displayName, year)
+        val form = EventForm(
+            calendarId = calendarId,
+            title = title,
+            isAllDay = true,
+            start = start,
+            end = start,
+            reminders = reminderCtx.resolveAllDay(calendarId),
+            availability = Availability.Free,
+            rrule = YEARLY_RRULE,
+        )
+        val dtStartMillis = form.toWriteTimes(ZoneId.systemDefault()).dtStartMillis
+        return BuiltManagedEvent(
+            desired = ManagedEventDesired(
+                uid = sd.managedUid(),
+                title = title,
+                dtStartMillis = dtStartMillis,
+                rrule = YEARLY_RRULE,
+            ),
+            form = form,
+        )
+    }
+
+    // Managed events are always all-day, so only the all-day defaults apply.
+    private suspend fun readReminderContext(): ReminderContext = ReminderContext(
+        allDayGlobal = prefs.defaultAllDayReminderMinutes.first(),
+        allDayOverrides = prefs.perCalendarAllDayReminderOverride.first(),
+        allDayTimeMinutes = prefs.allDayReminderTimeMinutes.first(),
+    )
+
+    private data class ReminderContext(
+        val allDayGlobal: List<Int>,
+        val allDayOverrides: Map<Long, List<Int>>,
+        val allDayTimeMinutes: Int,
+    ) {
+        /** Same semantics as `resolveDefaultReminder`: present-empty = explicit none. */
+        fun resolveAllDay(calendarId: Long): List<Int> =
+            allDayOverrides[calendarId] ?: allDayGlobal
+    }
+
+    private data class BuiltManagedEvent(val desired: ManagedEventDesired, val form: EventForm)
+
+    private companion object {
+        /** "On the day" (0) + one week before (7 days), as all-day lead minutes. */
+        val DEFAULT_REMINDER_MINUTES = listOf(0, 7 * 24 * 60)
+        val YEARLY_RRULE = SimpleRecurrence(freq = RecurrenceFreq.Yearly).toRRule()
+    }
+}
+
+/** The managed columns of a desired event, compared against the existing row. */
+internal data class ManagedEventDesired(
+    val uid: String,
+    val title: String,
+    val dtStartMillis: Long,
+    val rrule: String?,
+)
+
+internal data class ManagedFieldUpdate(val eventId: Long, val columns: Map<String, Any?>)
+
+internal data class ManagedDiff(
+    val insertUids: List<String>,
+    val updates: List<ManagedFieldUpdate>,
+    val deleteEventIds: List<Long>,
+)
+
+/**
+ * The idempotent diff at the heart of the mirror, keyed on `UID_2445`:
+ * desired-not-existing → insert, existing-not-desired → delete, and for events
+ * in both only the *changed* managed columns (title/dtstart/rrule) are emitted —
+ * so a re-run with no contact changes produces nothing, and a managed update
+ * never touches user-owned columns or reminder rows. Pure, so it's unit-tested.
+ */
+internal fun diffManagedEvents(
+    desired: List<ManagedEventDesired>,
+    existing: List<ManagedEventRow>,
+): ManagedDiff {
+    val desiredByUid = desired.associateBy { it.uid }
+    val existingByUid = existing.associateBy { it.uid }
+    val insertUids = desired.filter { it.uid !in existingByUid }.map { it.uid }
+    val deleteEventIds = existing.filter { it.uid !in desiredByUid }.map { it.eventId }
+    val updates = buildList {
+        for (d in desired) {
+            val row = existingByUid[d.uid] ?: continue
+            val columns = buildMap<String, Any?> {
+                if (row.title != d.title) put(CalendarContract.Events.TITLE, d.title)
+                if (row.dtStartMillis != d.dtStartMillis) {
+                    put(CalendarContract.Events.DTSTART, d.dtStartMillis)
+                }
+                if (row.rrule != d.rrule) put(CalendarContract.Events.RRULE, d.rrule)
+            }
+            if (columns.isNotEmpty()) add(ManagedFieldUpdate(row.eventId, columns))
+        }
+    }
+    return ManagedDiff(insertUids, updates, deleteEventIds)
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/crash/CrashReporter.kt

@@ -1,188 +0,0 @@
-package de.jeanlucmakiola.calendula.data.crash
-
-import android.content.Context
-import android.content.pm.PackageInfo
-import android.os.Build
-import androidx.core.content.pm.PackageInfoCompat
-import java.io.File
-import java.io.PrintWriter
-import java.io.StringWriter
-import java.time.Instant
-import java.time.ZoneId
-import java.time.format.DateTimeFormatter
-import java.util.Locale
-
-/**
- * Privacy-respecting crash capture (prod-readiness item 10). On an uncaught
- * exception it writes a self-contained report to the app's private storage and
- * then chains to the platform's default handler, so the process still dies
- * normally (and the OS shows its own "stopped" dialog). Nothing is uploaded —
- * the app holds no `INTERNET` permission. The user submits the report later,
- * by hand, as a Gitea issue (see the ui/crash surfaces).
- *
- * The report is built from a fixed [CrashContext] allowlist — app/Android/device
- * version, locale, time, and the stack trace — and **nothing else**: no device
- * identifiers, no account names, no calendar/event content, no logcat. The user
- * is always shown the full text before it leaves the device.
- */
-object CrashReporter {
-
-    /**
-     * Install the handler. Called first thing in `CalendulaApp.onCreate()` so it
-     * also catches crashes during startup. The handler swallows nothing — it
-     * persists, then delegates to the previously-registered handler.
-     */
-    fun install(context: Context) {
-        val appContext = context.applicationContext
-        val previous = Thread.getDefaultUncaughtExceptionHandler()
-        Thread.setDefaultUncaughtExceptionHandler { thread, throwable ->
-            // Capturing must never mask the original crash, so guard every step.
-            runCatching {
-                val now = System.currentTimeMillis()
-                writeReport(appContext, buildCrashReport(CrashContext.from(appContext), throwable, now))
-                recordCrashTime(appContext, now)
-            }
-            previous?.uncaughtException(thread, throwable)
-        }
-    }
-
-    /** The persisted report from the last crash, or null if there is none. */
-    fun pendingReport(context: Context): String? {
-        val file = reportFile(context)
-        return if (file.exists()) runCatching { file.readText() }.getOrNull()?.takeIf { it.isNotBlank() } else null
-    }
-
-    /**
-     * Whether to surface the report unprompted (on the next launch): a report
-     * exists and the user hasn't already waved this one away. Settings reaches
-     * the report via [pendingReport] regardless, so "Not now" only stops the
-     * auto-prompt — it doesn't discard the report.
-     */
-    fun shouldPrompt(context: Context): Boolean =
-        reportFile(context).exists() && !dismissedFile(context).exists()
-
-    /** Stop auto-prompting for the current report without discarding it. */
-    fun dismissPrompt(context: Context) {
-        runCatching { dismissedFile(context).apply { parentFile?.mkdirs() }.writeText("") }
-    }
-
-    /** Drop the persisted report once the user has reported it (or from Settings). */
-    fun clearReport(context: Context) {
-        runCatching { reportFile(context).delete() }
-        runCatching { dismissedFile(context).delete() }
-    }
-
-    /**
-     * Whether the app appears to be in a startup crash-loop: at least
-     * [LOOP_THRESHOLD] crashes inside [LOOP_WINDOW_MS]. In that case the main UI
-     * can't be trusted to start, so the caller routes straight to the standalone
-     * report screen instead of re-entering the crashing graph.
-     */
-    fun isCrashLoop(context: Context): Boolean {
-        val times = readCrashTimes(context)
-        if (times.size < LOOP_THRESHOLD) return false
-        val recent = times.sortedDescending()
-        return recent[0] - recent[LOOP_THRESHOLD - 1] <= LOOP_WINDOW_MS
-    }
-
-    /**
-     * Mark the app as having started successfully, resetting the loop counter so
-     * an ordinary single crash much later never trips loop detection. The
-     * pending report itself is kept — only the timing trail is cleared.
-     */
-    fun markHealthy(context: Context) {
-        runCatching { timesFile(context).delete() }
-    }
-
-    // --- persistence -------------------------------------------------------
-
-    private fun writeReport(context: Context, report: String) {
-        val file = reportFile(context).apply { parentFile?.mkdirs() }
-        file.writeText(report.take(MAX_REPORT_CHARS))
-        // A fresh crash should prompt again, even if the previous one was waved away.
-        runCatching { dismissedFile(context).delete() }
-    }
-
-    private fun recordCrashTime(context: Context, nowMillis: Long) {
-        val kept = (readCrashTimes(context) + nowMillis).takeLast(MAX_TIMES)
-        timesFile(context).apply { parentFile?.mkdirs() }
-            .writeText(kept.joinToString("\n"))
-    }
-
-    private fun readCrashTimes(context: Context): List<Long> {
-        val file = timesFile(context)
-        if (!file.exists()) return emptyList()
-        return runCatching { file.readLines().mapNotNull { it.trim().toLongOrNull() } }.getOrDefault(emptyList())
-    }
-
-    private fun crashDir(context: Context) = File(context.filesDir, CRASH_DIR)
-    private fun reportFile(context: Context) = File(crashDir(context), REPORT_FILE)
-    private fun timesFile(context: Context) = File(crashDir(context), TIMES_FILE)
-    private fun dismissedFile(context: Context) = File(crashDir(context), DISMISSED_FILE)
-
-    private const val CRASH_DIR = "crash"
-    private const val REPORT_FILE = "last_crash.txt"
-    private const val TIMES_FILE = "crash_times.txt"
-    private const val DISMISSED_FILE = "dismissed"
-    private const val MAX_TIMES = 5
-    private const val MAX_REPORT_CHARS = 64 * 1024
-    private const val LOOP_THRESHOLD = 2
-    private const val LOOP_WINDOW_MS = 10_000L
-}
-
-/**
- * The allowlist of non-personal facts that go into a crash report. Built from
- * [Build] and the app's own [PackageInfo]; deliberately holds no identifiers.
- */
-data class CrashContext(
-    val appVersionName: String,
-    val appVersionCode: Long,
-    val sdkInt: Int,
-    val androidRelease: String,
-    val manufacturer: String,
-    val model: String,
-    val locale: String,
-) {
-    companion object {
-        fun from(context: Context): CrashContext {
-            val pkg = runCatching {
-                context.packageManager.getPackageInfo(context.packageName, 0)
-            }.getOrNull()
-            return CrashContext(
-                appVersionName = pkg?.versionName ?: "?",
-                appVersionCode = pkg?.let { PackageInfoCompat.getLongVersionCode(it) } ?: 0L,
-                sdkInt = Build.VERSION.SDK_INT,
-                androidRelease = Build.VERSION.RELEASE ?: "?",
-                manufacturer = Build.MANUFACTURER ?: "?",
-                model = Build.MODEL ?: "?",
-                locale = Locale.getDefault().toLanguageTag(),
-            )
-        }
-    }
-}
-
-/**
- * Render a crash report from the [ctx] allowlist, the [throwable]'s full stack
- * trace, and the crash [nowMillis]. Pure (no Android, no I/O) so it is unit
- * tested. The leading marker doubles as the file's sanity check in
- * [CrashReporter.pendingReport].
- */
-fun buildCrashReport(ctx: CrashContext, throwable: Throwable, nowMillis: Long): String {
-    val trace = StringWriter().also { throwable.printStackTrace(PrintWriter(it)) }.toString().trim()
-    val time = runCatching {
-        Instant.ofEpochMilli(nowMillis).atZone(ZoneId.systemDefault()).format(TIME_FORMAT)
-    }.getOrDefault(nowMillis.toString())
-    return buildString {
-        appendLine("Calendula crash report")
-        appendLine("App version: ${ctx.appVersionName} (${ctx.appVersionCode})")
-        appendLine("Android: ${ctx.androidRelease} (API ${ctx.sdkInt})")
-        appendLine("Device: ${ctx.manufacturer} ${ctx.model}")
-        appendLine("Locale: ${ctx.locale}")
-        appendLine("Time: $time")
-        appendLine()
-        appendLine("Stack trace:")
-        append(trace)
-    }
-}
-
-private val TIME_FORMAT = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")

app/src/main/java/de/jeanlucmakiola/calendula/data/di/DataModule.kt

@@ -14,6 +14,10 @@ import de.jeanlucmakiola.calendula.data.calendar.AndroidCalendarDataSource
 import de.jeanlucmakiola.calendula.data.calendar.CalendarDataSource
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepositoryImpl
+import de.jeanlucmakiola.calendula.data.contacts.AndroidContactSpecialDatesDataSource
+import de.jeanlucmakiola.calendula.data.contacts.AndroidSpecialDatesCalendarSpec
+import de.jeanlucmakiola.calendula.data.contacts.ContactSpecialDatesDataSource
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesCalendarSpec
 import de.jeanlucmakiola.calendula.data.reminders.AndroidReminderAlertStore
 import de.jeanlucmakiola.calendula.data.reminders.ReminderAlertStore
 import kotlinx.coroutines.CoroutineDispatcher
@@ -45,6 +49,18 @@ abstract class DataBindModule {
     abstract fun bindReminderAlertStore(
         impl: AndroidReminderAlertStore,
     ): ReminderAlertStore
+
+    @Binds
+    @Singleton
+    abstract fun bindContactSpecialDatesDataSource(
+        impl: AndroidContactSpecialDatesDataSource,
+    ): ContactSpecialDatesDataSource
+
+    @Binds
+    @Singleton
+    abstract fun bindSpecialDatesCalendarSpec(
+        impl: AndroidSpecialDatesCalendarSpec,
+    ): SpecialDatesCalendarSpec
 }
 
 @Module

app/src/main/java/de/jeanlucmakiola/calendula/data/fonts/CustomFontStore.kt

@@ -0,0 +1,57 @@
+package de.jeanlucmakiola.calendula.data.fonts
+
+import android.content.Context
+import android.net.Uri
+import de.jeanlucmakiola.calendula.domain.FontRole
+import java.io.File
+import java.util.Locale
+import android.graphics.fonts.Font as PlatformFont
+
+/**
+ * Storage for user-loaded custom fonts (issue #19). A font a user picks via the
+ * system file picker is copied into the app's private storage — one file per
+ * [FontRole] — so the selection survives even if the original is later moved or
+ * deleted, and never leaves the app. The chosen file is validated as a real font
+ * before it replaces the previous one, so a bad pick can't wedge the app-wide
+ * typography.
+ */
+object CustomFontStore {
+
+    private fun dir(context: Context): File = File(context.filesDir, "fonts")
+
+    /** The stored font file for [role] (may not exist yet). */
+    fun file(context: Context, role: FontRole): File =
+        File(dir(context), "${role.name.lowercase(Locale.ROOT)}.ttf")
+
+    fun exists(context: Context, role: FontRole): Boolean =
+        file(context, role).let { it.exists() && it.length() > 0 }
+
+    /**
+     * Copy [uri] into per-role storage, first validating that it parses as a
+     * font. Returns true on success; on any failure the previous file is left
+     * untouched and false is returned (the caller keeps the old selection).
+     */
+    fun import(context: Context, role: FontRole, uri: Uri): Boolean {
+        val target = file(context, role)
+        target.parentFile?.mkdirs()
+        val tmp = File(target.parentFile, "${role.name.lowercase(Locale.ROOT)}.tmp")
+        return try {
+            context.contentResolver.openInputStream(uri)?.use { input ->
+                tmp.outputStream().use { output -> input.copyTo(output) }
+            } ?: return false
+            // Font.Builder throws IOException for anything that isn't a valid
+            // font file (API 29+, which is our minSdk) — a cheap, reliable check.
+            PlatformFont.Builder(tmp).build()
+            if (target.exists() && !target.delete()) return false
+            tmp.renameTo(target)
+        } catch (_: Exception) {
+            tmp.delete()
+            false
+        }
+    }
+
+    /** Forget the custom font for [role] (used when switching away from it). */
+    fun clear(context: Context, role: FontRole) {
+        file(context, role).delete()
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/ics/IcsExporter.kt

@@ -3,6 +3,7 @@ package de.jeanlucmakiola.calendula.data.ics
 import android.content.Context
 import android.net.Uri
 import androidx.core.content.FileProvider
+import androidx.documentfile.provider.DocumentFile
 import dagger.hilt.android.qualifiers.ApplicationContext
 import java.io.File
 import java.io.IOException
@@ -28,6 +29,36 @@ class IcsExporter @Inject constructor(
         } ?: throw IOException("Could not open output stream for export (scheme=${uri.scheme})")
     }
 
+    /**
+     * Write [content] to [fileName] inside the persisted SAF tree [folder],
+     * overwriting it if it already exists (the automatic-backup destination).
+     * Requires a persisted write grant on [folder]. Throws on failure.
+     */
+    fun writeToFolder(folder: Uri, fileName: String, content: String) {
+        val dir = DocumentFile.fromTreeUri(context, folder)
+            ?: throw IOException("Backup folder is not accessible")
+        if (!dir.exists() || !dir.canWrite()) {
+            throw IOException("Backup folder is missing or not writable")
+        }
+        // Reuse the canonical file if present and clean up any "name (1).ics"
+        // duplicates SAF may have created if two runs ever raced — so we always
+        // converge on a single overwritten file.
+        val base = fileName.substringBeforeLast('.')
+        val ext = fileName.substringAfterLast('.', "")
+        var target: DocumentFile? = null
+        for (child in dir.listFiles()) {
+            val name = child.name ?: continue
+            when {
+                name == fileName -> target = child
+                name.startsWith("$base (") && name.endsWith(".$ext") -> child.delete()
+            }
+        }
+        val file = target
+            ?: dir.createFile(MIME_CALENDAR, fileName)
+            ?: throw IOException("Could not create backup file in the chosen folder")
+        writeDocument(file.uri, content)
+    }
+
     /**
      * Stage [content] in a private cache file and return a shareable content
      * Uri for an `ACTION_SEND`. [fileName] is the suggested `.ics` name shown to
@@ -42,5 +73,6 @@ class IcsExporter @Inject constructor(
 
     private companion object {
         const val SHARE_DIR = "shared_ics"
+        const val MIME_CALENDAR = "text/calendar"
     }
 }

app/src/main/java/de/jeanlucmakiola/calendula/data/prefs/CalendarPrefs.kt

@@ -39,6 +39,31 @@ class CalendarPrefs @Inject constructor(
         }
     }
 
+    /**
+     * App-side preference for "calendars the user has disabled in this app" — a
+     * heavier level than [hiddenCalendarIds]. A disabled calendar is removed from
+     * every surface (drawer filter, event-form picker, import picker) and its
+     * events never appear; it stays listed only in Settings → Calendars so it can
+     * be re-enabled. Stored exactly like the hidden set; never touches the
+     * system's VISIBLE/SYNC_EVENTS flags, so other calendar apps are unaffected.
+     */
+    val disabledCalendarIds: Flow<Set<Long>> = store.data.map { prefs ->
+        prefs[DISABLED_IDS_KEY].orEmpty()
+            .split(',')
+            .mapNotNull { it.trim().toLongOrNull() }
+            .toSet()
+    }
+
+    suspend fun setDisabledCalendarIds(ids: Set<Long>) {
+        store.edit { prefs ->
+            if (ids.isEmpty()) {
+                prefs.remove(DISABLED_IDS_KEY)
+            } else {
+                prefs[DISABLED_IDS_KEY] = ids.sorted().joinToString(",")
+            }
+        }
+    }
+
     /**
      * The calendar the user last created an event in; preselected in the
      * event form. Null until the first event is created.
@@ -53,6 +78,7 @@ class CalendarPrefs @Inject constructor(
 
     companion object {
         internal val HIDDEN_IDS_KEY = stringPreferencesKey("hidden_calendar_ids")
+        internal val DISABLED_IDS_KEY = stringPreferencesKey("disabled_calendar_ids")
         internal val LAST_USED_CALENDAR_KEY = longPreferencesKey("last_used_calendar_id")
     }
 }

app/src/main/java/de/jeanlucmakiola/calendula/data/prefs/SettingsPrefs.kt

@@ -5,8 +5,23 @@ import androidx.datastore.preferences.core.Preferences
 import androidx.datastore.preferences.core.booleanPreferencesKey
 import androidx.datastore.preferences.core.edit
 import androidx.datastore.preferences.core.intPreferencesKey
+import androidx.datastore.preferences.core.longPreferencesKey
 import androidx.datastore.preferences.core.stringPreferencesKey
+import de.jeanlucmakiola.floret.reminders.ReminderOverride
+import de.jeanlucmakiola.floret.reminders.ReminderOverrideCodec
+import de.jeanlucmakiola.floret.reminders.applyReminderOverride
+import de.jeanlucmakiola.floret.reminders.normalizeReminders
+import de.jeanlucmakiola.floret.reminders.reminderOverrideFor
 import de.jeanlucmakiola.calendula.domain.EventFormField
+import de.jeanlucmakiola.calendula.domain.FontRole
+import de.jeanlucmakiola.calendula.domain.contacts.SpecialDateType
+import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
+import de.jeanlucmakiola.calendula.ui.agenda.parseAgendaRange
+import de.jeanlucmakiola.calendula.ui.agenda.storageValue
+import de.jeanlucmakiola.calendula.ui.common.CalendarView
+import de.jeanlucmakiola.calendula.ui.common.IMPLEMENTED_VIEWS
+import de.jeanlucmakiola.calendula.ui.common.QuickSwitchConfig
+import de.jeanlucmakiola.calendula.ui.theme.FONT_SYSTEM_TOKEN
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.map
 import kotlinx.datetime.DayOfWeek
@@ -18,18 +33,52 @@ import javax.inject.Singleton
 /** Light/dark override. SYSTEM follows the device setting. */
 enum class ThemeMode { SYSTEM, LIGHT, DARK }
 
-/** Week-start override. AUTO derives the first day from the active locale. */
-enum class WeekStartPref { AUTO, MONDAY, SUNDAY }
+/**
+ * Week-start override. [Auto] derives the first day from the active locale;
+ * [Day] pins a specific weekday (any of the seven).
+ */
+sealed interface WeekStartPref {
+    data object Auto : WeekStartPref
+    data class Day(val day: DayOfWeek) : WeekStartPref
+}
 
 /**
- * Resolve the preference to a concrete first-day-of-week. AUTO reads the
- * locale's convention (e.g. Monday in DE, Sunday in en-US).
+ * Clock convention for time-of-day labels. AUTO follows the device's 24-hour
+ * system setting; the others force a 12- or 24-hour clock app-wide.
+ */
+enum class TimeFormatPref { AUTO, TWELVE_HOUR, TWENTY_FOUR_HOUR }
+
+/**
+ * How the Agenda screen treats events that have already finished today: [SHOW]
+ * leaves them as-is (the historical behaviour), [DIM] fades them, [HIDE] drops
+ * them from the list entirely.
+ */
+enum class PastEventDisplay { SHOW, DIM, HIDE }
+
+/** Parse a stored [PastEventDisplay.name]; unknown/null falls back to [default]. */
+fun parsePastEventDisplay(
+    stored: String?,
+    default: PastEventDisplay = PastEventDisplay.SHOW,
+): PastEventDisplay = PastEventDisplay.entries.firstOrNull { it.name == stored } ?: default
+
+/**
+ * Resolve to a concrete 24-hour flag. AUTO defers to [systemIs24Hour] (the
+ * device's `DateFormat.is24HourFormat` value).
+ */
+fun TimeFormatPref.is24Hour(systemIs24Hour: Boolean): Boolean = when (this) {
+    TimeFormatPref.AUTO -> systemIs24Hour
+    TimeFormatPref.TWELVE_HOUR -> false
+    TimeFormatPref.TWENTY_FOUR_HOUR -> true
+}
+
+/**
+ * Resolve the preference to a concrete first-day-of-week. [WeekStartPref.Auto]
+ * reads the locale's convention (e.g. Monday in DE, Sunday in en-US).
  */
 fun WeekStartPref.resolveFirstDay(locale: Locale): DayOfWeek = when (this) {
-    WeekStartPref.MONDAY -> DayOfWeek.MONDAY
-    WeekStartPref.SUNDAY -> DayOfWeek.SUNDAY
+    is WeekStartPref.Day -> day
     // java.time.DayOfWeek.value is ISO 1..7 (Mon..Sun) — same numbering kotlinx uses.
-    WeekStartPref.AUTO -> DayOfWeek(WeekFields.of(locale).firstDayOfWeek.value)
+    WeekStartPref.Auto -> DayOfWeek(WeekFields.of(locale).firstDayOfWeek.value)
 }
 
 /**
@@ -54,7 +103,7 @@ class SettingsPrefs @Inject constructor(
     }
 
     val weekStart: Flow<WeekStartPref> = store.data.map { prefs ->
-        prefs[WEEK_START_KEY].toEnum(WeekStartPref.AUTO)
+        parseWeekStart(prefs[WEEK_START_KEY])
     }
 
     suspend fun setThemeMode(mode: ThemeMode) {
@@ -65,8 +114,197 @@ class SettingsPrefs @Inject constructor(
         store.edit { it[DYNAMIC_COLOR_KEY] = enabled }
     }
 
+    /**
+     * Custom-font tokens per Material typeface role (issue #19). Stored as opaque
+     * strings — "system", "custom", or a bundled font's token — resolved to a
+     * FontFamily at the theme layer; an unknown token degrades to the default.
+     */
+    val brandFont: Flow<String> = store.data.map { prefs ->
+        prefs[BRAND_FONT_KEY] ?: FONT_SYSTEM_TOKEN
+    }
+
+    val plainFont: Flow<String> = store.data.map { prefs ->
+        prefs[PLAIN_FONT_KEY] ?: FONT_SYSTEM_TOKEN
+    }
+
+    suspend fun setBrandFont(token: String) {
+        store.edit { it[BRAND_FONT_KEY] = token }
+    }
+
+    suspend fun setPlainFont(token: String) {
+        store.edit { it[PLAIN_FONT_KEY] = token }
+    }
+
+    /**
+     * A per-role bump counter for the user-loaded custom font. Re-importing
+     * overwrites the same file under the same "custom" token, so the token alone
+     * can't signal the change; this stamp — carried into AppFontSettings — breaks
+     * value equality so the resolved FontFamily (and its previews) refresh. A
+     * missing key is 0 (existing installs); the first import bumps it to 1.
+     */
+    val brandFontStamp: Flow<Int> = store.data.map { prefs -> prefs[BRAND_FONT_STAMP_KEY] ?: 0 }
+
+    val plainFontStamp: Flow<Int> = store.data.map { prefs -> prefs[PLAIN_FONT_STAMP_KEY] ?: 0 }
+
+    /** Bump [role]'s custom-font stamp after a re-import so equality-keyed caches refresh. */
+    suspend fun bumpCustomFontStamp(role: FontRole) {
+        val key = when (role) {
+            FontRole.BRAND -> BRAND_FONT_STAMP_KEY
+            FontRole.PLAIN -> PLAIN_FONT_STAMP_KEY
+        }
+        store.edit { it[key] = (it[key] ?: 0) + 1 }
+    }
+
     suspend fun setWeekStart(pref: WeekStartPref) {
-        store.edit { it[WEEK_START_KEY] = pref.name }
+        store.edit { it[WEEK_START_KEY] = pref.storageValue() }
+    }
+
+    /** Clock convention for time-of-day labels (v2.11). Defaults to AUTO (system). */
+    val timeFormat: Flow<TimeFormatPref> = store.data.map { prefs ->
+        prefs[TIME_FORMAT_KEY].toEnum(TimeFormatPref.AUTO)
+    }
+
+    suspend fun setTimeFormat(pref: TimeFormatPref) {
+        store.edit { it[TIME_FORMAT_KEY] = pref.name }
+    }
+
+    /**
+     * Whether the week/day timeline draws a faint separator line at each hour
+     * (v2.11). Defaults to OFF — the historical clean look; users opt in.
+     */
+    val showHourLines: Flow<Boolean> = store.data.map { prefs ->
+        prefs[SHOW_HOUR_LINES_KEY] ?: false
+    }
+
+    suspend fun setShowHourLines(enabled: Boolean) {
+        store.edit { it[SHOW_HOUR_LINES_KEY] = enabled }
+    }
+
+    /**
+     * How the Agenda screen treats events that already ended today. Defaults to
+     * [PastEventDisplay.SHOW] — the historical behaviour; users opt into dimming
+     * or hiding.
+     */
+    val pastEventDisplay: Flow<PastEventDisplay> = store.data.map { prefs ->
+        prefs[PAST_EVENT_DISPLAY_KEY].toEnum(PastEventDisplay.SHOW)
+    }
+
+    suspend fun setPastEventDisplay(mode: PastEventDisplay) {
+        store.edit { it[PAST_EVENT_DISPLAY_KEY] = mode.name }
+    }
+
+    /**
+     * Whether the month/week grids fade events that have already finished.
+     * Defaults to OFF — independent of the Agenda's [pastEventDisplay].
+     */
+    val dimCompletedEvents: Flow<Boolean> = store.data.map { prefs ->
+        prefs[DIM_COMPLETED_EVENTS_KEY] ?: false
+    }
+
+    suspend fun setDimCompletedEvents(enabled: Boolean) {
+        store.edit { it[DIM_COMPLETED_EVENTS_KEY] = enabled }
+    }
+
+    /**
+     * Whether the Month grid shows the calendar-week (ISO) number in a left
+     * gutter (#25). Defaults to OFF — users opt in, since it narrows the day
+     * cells slightly. The Week view shows its number unconditionally.
+     */
+    val showWeekNumbers: Flow<Boolean> = store.data.map { prefs ->
+        prefs[SHOW_WEEK_NUMBERS_KEY] ?: false
+    }
+
+    suspend fun setShowWeekNumbers(enabled: Boolean) {
+        store.edit { it[SHOW_WEEK_NUMBERS_KEY] = enabled }
+    }
+
+    /**
+     * How far ahead the in-app Agenda screen shows events (v2.11). Defaults to
+     * [AgendaRange.Month] — a month of upcoming events. Independent of the
+     * widget's [agendaWidgetRange].
+     */
+    val agendaScreenRange: Flow<AgendaRange> = store.data.map { prefs ->
+        parseAgendaRange(prefs[AGENDA_SCREEN_RANGE_KEY], AgendaRange.Month)
+    }
+
+    suspend fun setAgendaScreenRange(range: AgendaRange) {
+        store.edit { it[AGENDA_SCREEN_RANGE_KEY] = range.storageValue() }
+    }
+
+    /** How far ahead the agenda **widget** shows events (v2.11). Defaults to Month. */
+    val agendaWidgetRange: Flow<AgendaRange> = store.data.map { prefs ->
+        parseAgendaRange(prefs[AGENDA_WIDGET_RANGE_KEY], AgendaRange.Month)
+    }
+
+    suspend fun setAgendaWidgetRange(range: AgendaRange) {
+        store.edit { it[AGENDA_WIDGET_RANGE_KEY] = range.storageValue() }
+    }
+
+    /**
+     * Whether the agenda shows its top range bar — the "showing …" header and
+     * the session range switcher (v2.11). Default ON.
+     */
+    val agendaShowRangeBar: Flow<Boolean> = store.data.map { prefs ->
+        prefs[AGENDA_SHOW_RANGE_BAR_KEY] ?: true
+    }
+
+    suspend fun setAgendaShowRangeBar(enabled: Boolean) {
+        store.edit { it[AGENDA_SHOW_RANGE_BAR_KEY] = enabled }
+    }
+
+    /**
+     * The calendar view the app opens on (M1). Defaults to [CalendarView.Week] —
+     * the historical hard-coded startup view — so existing users see no change
+     * until they pick another. Also the bottom of the in-app view back stack, so
+     * back from any other view returns here before exiting.
+     */
+    val defaultView: Flow<CalendarView> = store.data.map { prefs ->
+        prefs[DEFAULT_VIEW_KEY].toEnum(CalendarView.Week)
+    }
+
+    suspend fun setDefaultView(view: CalendarView) {
+        store.edit { it[DEFAULT_VIEW_KEY] = view.name }
+    }
+
+    /**
+     * Quick-switch button customisation (#24): the ordered full view list plus
+     * which views are enabled in the cycle. Stored comma-joined by enum name, a
+     * "!" prefix marking a disabled view (e.g. "Month,Week,!Day,Agenda"). Missing
+     * views are appended enabled and unknown names dropped, so a future view
+     * defaults into the cycle. An absent key means [QuickSwitchConfig.Default].
+     */
+    val quickSwitchConfig: Flow<QuickSwitchConfig> = store.data.map { prefs ->
+        parseQuickSwitch(prefs[QUICK_SWITCH_VIEWS_KEY])
+    }
+
+    suspend fun setQuickSwitchConfig(config: QuickSwitchConfig) {
+        store.edit { it[QUICK_SWITCH_VIEWS_KEY] = serializeQuickSwitch(config) }
+    }
+
+    /**
+     * Atomic read-modify-write of the quick-switch config: [transform] sees the
+     * value currently stored, parsed inside the edit block, not the async-echoed
+     * UI snapshot. Two rapid intents (a toggle then a drag) therefore compose
+     * instead of each re-serialising a stale copy of the other field over it.
+     */
+    suspend fun updateQuickSwitch(transform: (QuickSwitchConfig) -> QuickSwitchConfig) {
+        store.edit { prefs ->
+            val current = parseQuickSwitch(prefs[QUICK_SWITCH_VIEWS_KEY])
+            prefs[QUICK_SWITCH_VIEWS_KEY] = serializeQuickSwitch(transform(current))
+        }
+    }
+
+    /**
+     * Navigation-drawer view order (#24). Comma-joined enum names; missing views
+     * are appended in default order and unknown names dropped. Absent key means
+     * [IMPLEMENTED_VIEWS] (the historical fixed order).
+     */
+    val drawerViewOrder: Flow<List<CalendarView>> = store.data.map { prefs ->
+        parseViewOrder(prefs[DRAWER_VIEW_ORDER_KEY])
+    }
+
+    suspend fun setDrawerViewOrder(order: List<CalendarView>) {
+        store.edit { it[DRAWER_VIEW_ORDER_KEY] = order.joinToString(",") { view -> view.name } }
     }
 
     /**
@@ -87,6 +325,20 @@ class SettingsPrefs @Inject constructor(
         }
     }
 
+    /**
+     * Whether opening the new-event form focuses the title field and raises the
+     * keyboard straight away (issue #10). Default ON — a new event almost always
+     * gets a title, so this saves a tap; users who set the time/calendar first
+     * can turn it off. Only the create form auto-focuses — editing never does.
+     */
+    val autofocusEventTitle: Flow<Boolean> = store.data.map { prefs ->
+        prefs[AUTOFOCUS_EVENT_TITLE_KEY] ?: true
+    }
+
+    suspend fun setAutofocusEventTitle(enabled: Boolean) {
+        store.edit { it[AUTOFOCUS_EVENT_TITLE_KEY] = enabled }
+    }
+
     /**
      * Whether Calendula posts reminder notifications (v1.4). Defaults to ON —
      * for users whose only calendar app this is, reminders are essential; the
@@ -129,35 +381,36 @@ class SettingsPrefs @Inject constructor(
     }
 
     /**
-     * The default reminder lead time (minutes before start) prefilled on new
-     * **timed** events. `null` = no default reminder — the prior behaviour, kept
-     * as the factory default so existing users aren't surprised by reminders they
-     * never asked for. Stored as a string so "none" is distinct from a numeric
-     * value (and from an unset key, which is also "none"). Per-calendar overrides
-     * in [perCalendarReminderOverride] take precedence; all-day events instead use
+     * The default reminder lead times (minutes before start) prefilled on new
+     * **timed** events. The empty list = no default reminder — the prior
+     * behaviour, kept as the factory default so existing users aren't surprised by
+     * reminders they never asked for. Stored as a comma-joined list of minutes, or
+     * "none"/empty for no reminder (also the unset state). A legacy single value
+     * ("30") parses transparently to a one-element list. Per-calendar overrides in
+     * [perCalendarReminderOverride] take precedence; all-day events instead use
      * [defaultAllDayReminderMinutes]. Resolve with [resolveDefaultReminder].
      */
-    val defaultReminderMinutes: Flow<Int?> = store.data.map { prefs ->
-        prefs[DEFAULT_REMINDER_KEY].toReminderMinutes()
+    val defaultReminderMinutes: Flow<List<Int>> = store.data.map { prefs ->
+        prefs[DEFAULT_REMINDER_KEY].toReminderList()
     }
 
-    suspend fun setDefaultReminderMinutes(minutes: Int?) {
-        store.edit { it[DEFAULT_REMINDER_KEY] = minutes?.toString() ?: NONE }
+    suspend fun setDefaultReminderMinutes(minutes: List<Int>) {
+        store.edit { it[DEFAULT_REMINDER_KEY] = minutes.toStoredReminders() }
     }
 
     /**
-     * The default reminder lead time prefilled on new **all-day** events, in
+     * The default reminder lead times prefilled on new **all-day** events, in
      * minutes before the start of the day. All-day events want day-scale lead
      * times ("1 day before"), so they have their own default rather than reusing
-     * the timed one. `null` = no default. Per-calendar overrides do **not** apply
-     * to all-day events — they always use this global value.
+     * the timed one. Empty list = no default. Per-calendar overrides do **not**
+     * apply to all-day events — they always use this global value.
      */
-    val defaultAllDayReminderMinutes: Flow<Int?> = store.data.map { prefs ->
-        prefs[DEFAULT_ALLDAY_REMINDER_KEY].toReminderMinutes()
+    val defaultAllDayReminderMinutes: Flow<List<Int>> = store.data.map { prefs ->
+        prefs[DEFAULT_ALLDAY_REMINDER_KEY].toReminderList()
     }
 
-    suspend fun setDefaultAllDayReminderMinutes(minutes: Int?) {
-        store.edit { it[DEFAULT_ALLDAY_REMINDER_KEY] = minutes?.toString() ?: NONE }
+    suspend fun setDefaultAllDayReminderMinutes(minutes: List<Int>) {
+        store.edit { it[DEFAULT_ALLDAY_REMINDER_KEY] = minutes.toStoredReminders() }
     }
 
     /**
@@ -178,23 +431,37 @@ class SettingsPrefs @Inject constructor(
     }
 
     /**
-     * Per-calendar overrides of [defaultReminderMinutes] for **timed** events,
-     * keyed by calendar id. A calendar **present** in the map overrides the global
-     * timed default for its new events: a `null` value means "no reminder", an int
-     * means that lead time. A calendar **absent** from the map inherits the global
-     * default. Serialised as `id=value;id=value`, with `none` for an explicit
-     * no-reminder override. (All-day events ignore this and use
-     * [defaultAllDayReminderMinutes].)
+     * How long the notification "Snooze" action defers a reminder, in minutes.
+     * Tapping Snooze cancels the notification and re-posts it after this delay
+     * via an exact alarm (the calendar provider won't re-fire). Default 10 min;
+     * clamped to at least 1.
      */
-    val perCalendarReminderOverride: Flow<Map<Long, Int?>> = store.data.map { prefs ->
-        parseReminderOverrides(prefs[CALENDAR_REMINDER_OVERRIDE_KEY])
+    val snoozeMinutes: Flow<Int> = store.data.map { prefs ->
+        (prefs[SNOOZE_MINUTES_KEY] ?: DEFAULT_SNOOZE_MINUTES).coerceAtLeast(1)
     }
 
-    suspend fun setCalendarReminderOverride(calendarId: Long, override: CalendarReminderOverride) {
+    suspend fun setSnoozeMinutes(minutes: Int) {
+        store.edit { it[SNOOZE_MINUTES_KEY] = minutes.coerceAtLeast(1) }
+    }
+
+    /**
+     * Per-calendar overrides of [defaultReminderMinutes] for **timed** events,
+     * keyed by calendar id. A calendar **present** in the map overrides the global
+     * timed default for its new events: an **empty** list means "no reminder", a
+     * non-empty list means those lead times. A calendar **absent** from the map
+     * inherits the global default. Serialised as `id=value;id=value`, where a value
+     * is a comma-joined minute list or `none` for an explicit no-reminder override.
+     * (All-day events ignore this and use [defaultAllDayReminderMinutes].)
+     */
+    val perCalendarReminderOverride: Flow<Map<Long, List<Int>>> = store.data.map { prefs ->
+        reminderOverrideCodec.parse(prefs[CALENDAR_REMINDER_OVERRIDE_KEY])
+    }
+
+    suspend fun setCalendarReminderOverride(calendarId: Long, override: ReminderOverride) {
         store.edit { prefs ->
-            val current = parseReminderOverrides(prefs[CALENDAR_REMINDER_OVERRIDE_KEY]).toMutableMap()
-            current.applyOverride(calendarId, override)
-            prefs[CALENDAR_REMINDER_OVERRIDE_KEY] = serializeReminderOverrides(current)
+            val current = reminderOverrideCodec.parse(prefs[CALENDAR_REMINDER_OVERRIDE_KEY]).toMutableMap()
+            current.applyReminderOverride(calendarId, override)
+            prefs[CALENDAR_REMINDER_OVERRIDE_KEY] = reminderOverrideCodec.serialize(current)
         }
     }
 
@@ -203,22 +470,157 @@ class SettingsPrefs @Inject constructor(
      * events, with the same semantics as [perCalendarReminderOverride] (absent =
      * inherit the global all-day default; present null = no reminder).
      */
-    val perCalendarAllDayReminderOverride: Flow<Map<Long, Int?>> = store.data.map { prefs ->
-        parseReminderOverrides(prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY])
+    val perCalendarAllDayReminderOverride: Flow<Map<Long, List<Int>>> = store.data.map { prefs ->
+        reminderOverrideCodec.parse(prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY])
     }
 
     suspend fun setCalendarAllDayReminderOverride(
         calendarId: Long,
-        override: CalendarReminderOverride,
+        override: ReminderOverride,
     ) {
         store.edit { prefs ->
             val current =
-                parseReminderOverrides(prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY]).toMutableMap()
-            current.applyOverride(calendarId, override)
-            prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY] = serializeReminderOverrides(current)
+                reminderOverrideCodec.parse(prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY]).toMutableMap()
+            current.applyReminderOverride(calendarId, override)
+            prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY] = reminderOverrideCodec.serialize(current)
         }
     }
 
+    // --- Automatic backup (issue #8) ------------------------------------
+
+    /** Whether periodic automatic `.ics` export of local calendars is on. Default OFF. */
+    val autoBackupEnabled: Flow<Boolean> = store.data.map { it[AUTO_BACKUP_ENABLED_KEY] ?: false }
+
+    suspend fun setAutoBackupEnabled(enabled: Boolean) {
+        store.edit { it[AUTO_BACKUP_ENABLED_KEY] = enabled }
+    }
+
+    /** Export interval in minutes. Default daily; floored at [MIN_BACKUP_INTERVAL]. */
+    val autoBackupIntervalMinutes: Flow<Long> = store.data.map { prefs ->
+        (prefs[AUTO_BACKUP_INTERVAL_KEY] ?: DEFAULT_BACKUP_INTERVAL).coerceAtLeast(MIN_BACKUP_INTERVAL)
+    }
+
+    suspend fun setAutoBackupIntervalMinutes(minutes: Long) {
+        store.edit { it[AUTO_BACKUP_INTERVAL_KEY] = minutes.coerceAtLeast(MIN_BACKUP_INTERVAL) }
+    }
+
+    /** Persisted SAF tree Uri of the destination folder, or null if unset. */
+    val autoBackupFolderUri: Flow<String?> = store.data.map { it[AUTO_BACKUP_FOLDER_KEY] }
+
+    suspend fun setAutoBackupFolderUri(uri: String?) {
+        store.edit { prefs ->
+            if (uri == null) prefs.remove(AUTO_BACKUP_FOLDER_KEY) else prefs[AUTO_BACKUP_FOLDER_KEY] = uri
+        }
+    }
+
+    /** Outcome of the last automatic run, for the settings status line. */
+    val autoBackupStatus: Flow<BackupStatus> = store.data.map { prefs ->
+        BackupStatus(
+            lastRun = prefs[AUTO_BACKUP_LAST_RUN_KEY] ?: 0L,
+            lastSuccess = prefs[AUTO_BACKUP_LAST_SUCCESS_KEY] ?: true,
+            consecutiveFailures = prefs[AUTO_BACKUP_FAILURES_KEY] ?: 0,
+        )
+    }
+
+    /** Record an automatic run's outcome; resets the failure streak on success. */
+    suspend fun recordAutoBackupRun(success: Boolean, atMillis: Long) {
+        store.edit { prefs ->
+            prefs[AUTO_BACKUP_LAST_RUN_KEY] = atMillis
+            prefs[AUTO_BACKUP_LAST_SUCCESS_KEY] = success
+            val failures = prefs[AUTO_BACKUP_FAILURES_KEY] ?: 0
+            prefs[AUTO_BACKUP_FAILURES_KEY] = if (success) 0 else failures + 1
+        }
+    }
+
+    // --- Contact special dates (issue #15) ------------------------------
+
+    /** Master switch for the contact special-dates mirror. Default OFF (opt-in). */
+    val specialDatesEnabled: Flow<Boolean> = store.data.map { it[SPECIAL_DATES_ENABLED_KEY] ?: false }
+
+    suspend fun setSpecialDatesEnabled(enabled: Boolean) {
+        store.edit { it[SPECIAL_DATES_ENABLED_KEY] = enabled }
+    }
+
+    /** The date types the user wants mirrored (default: all three). */
+    val specialDatesTypes: Flow<Set<SpecialDateType>> = store.data.map { prefs ->
+        SpecialDateType.entries.filterTo(mutableSetOf()) { prefs[typeEnabledKey(it)] ?: true }
+    }
+
+    suspend fun setSpecialDateTypeEnabled(type: SpecialDateType, enabled: Boolean) {
+        store.edit { it[typeEnabledKey(type)] = enabled }
+    }
+
+    /** The managed calendar id per type, for the ones that currently exist. */
+    val specialDatesCalendars: Flow<Map<SpecialDateType, Long>> = store.data.map { prefs ->
+        SpecialDateType.entries.mapNotNull { type ->
+            prefs[calendarIdKey(type)]?.let { type to it }
+        }.toMap()
+    }
+
+    /** Every managed calendar id — the editor locks title/date/recurrence for their events. */
+    val managedCalendarIds: Flow<Set<Long>> = specialDatesCalendars.map { it.values.toSet() }
+
+    suspend fun setSpecialDatesCalendarId(type: SpecialDateType, calendarId: Long?) {
+        store.edit { prefs ->
+            if (calendarId == null) prefs.remove(calendarIdKey(type)) else prefs[calendarIdKey(type)] = calendarId
+        }
+    }
+
+    /**
+     * The title template per type ("{name}'s birthday"); an empty string means
+     * unset, so the settings screen can seed the localized default. `{name}` is
+     * the contact name, `{age}` the age at the upcoming date (empty when the
+     * birth year is unknown or [specialDatesShowAge] is off).
+     */
+    val specialDatesTitleTemplates: Flow<Map<SpecialDateType, String>> = store.data.map { prefs ->
+        SpecialDateType.entries.associateWith { prefs[titleTemplateKey(it)].orEmpty() }
+    }
+
+    suspend fun setSpecialDatesTitleTemplate(type: SpecialDateType, template: String) {
+        store.edit { it[titleTemplateKey(type)] = template }
+    }
+
+    /** Whether `{year}` resolves in the title (only meaningful when the year is known). Default ON. */
+    val specialDatesShowYear: Flow<Boolean> = store.data.map { it[SPECIAL_DATES_SHOW_YEAR_KEY] ?: true }
+
+    suspend fun setSpecialDatesShowYear(enabled: Boolean) {
+        store.edit { it[SPECIAL_DATES_SHOW_YEAR_KEY] = enabled }
+    }
+
+    /** Outcome of the last mirror sync, for the settings status line. */
+    val specialDatesStatus: Flow<SpecialDatesStatus> = store.data.map { prefs ->
+        SpecialDatesStatus(
+            lastRun = prefs[SPECIAL_DATES_LAST_RUN_KEY] ?: 0L,
+            stalled = prefs[SPECIAL_DATES_STALLED_KEY]
+                ?.let { name -> SpecialDatesStalledReason.entries.firstOrNull { it.name == name } },
+        )
+    }
+
+    /** Record a sync outcome; [stalled] non-null marks the feature paused (e.g. permission revoked). */
+    suspend fun recordSpecialDatesRun(atMillis: Long, stalled: SpecialDatesStalledReason?) {
+        store.edit { prefs ->
+            prefs[SPECIAL_DATES_LAST_RUN_KEY] = atMillis
+            if (stalled == null) prefs.remove(SPECIAL_DATES_STALLED_KEY) else prefs[SPECIAL_DATES_STALLED_KEY] = stalled.name
+        }
+    }
+
+    /** Epoch millis of the last foreground-triggered sync, to debounce ON_RESUME. */
+    val specialDatesLastForegroundSync: Flow<Long> =
+        store.data.map { it[SPECIAL_DATES_LAST_FG_SYNC_KEY] ?: 0L }
+
+    suspend fun setSpecialDatesLastForegroundSync(atMillis: Long) {
+        store.edit { it[SPECIAL_DATES_LAST_FG_SYNC_KEY] = atMillis }
+    }
+
+    private fun typeEnabledKey(type: SpecialDateType) =
+        booleanPreferencesKey("special_dates_type_${type.name}")
+
+    private fun calendarIdKey(type: SpecialDateType) =
+        longPreferencesKey("special_dates_calendar_${type.name}")
+
+    private fun titleTemplateKey(type: SpecialDateType) =
+        stringPreferencesKey("special_dates_title_${type.name}")
+
     private fun parseFormFields(stored: String?): Set<EventFormField> = when (stored) {
         null -> DEFAULT_FORM_FIELDS
         else -> stored.split(',')
@@ -226,11 +628,61 @@ class SettingsPrefs @Inject constructor(
             .toSet()
     }
 
+    /** Parse a plain comma-joined view order, completed to every implemented view. */
+    private fun parseViewOrder(stored: String?): List<CalendarView> =
+        completeViewOrder(
+            stored?.split(',').orEmpty()
+                .mapNotNull { name -> CalendarView.entries.firstOrNull { it.name == name.trim() } },
+        )
+
+    /** Parse the quick-switch config; "!"-prefixed names are disabled. */
+    private fun parseQuickSwitch(stored: String?): QuickSwitchConfig {
+        if (stored == null) return QuickSwitchConfig.Default
+        val parsed = stored.split(',').mapNotNull { raw ->
+            val token = raw.trim()
+            val disabled = token.startsWith("!")
+            val name = if (disabled) token.drop(1) else token
+            CalendarView.entries.firstOrNull { it.name == name }?.let { it to disabled }
+        }
+        val order = completeViewOrder(parsed.map { it.first })
+        // Only views explicitly stored disabled are excluded; anything appended
+        // (a view added in a later release) defaults into the cycle.
+        val disabled = parsed.filter { it.second }.map { it.first }.toSet()
+        return QuickSwitchConfig(order, order.filterNot { it in disabled }.toSet())
+    }
+
+    private fun serializeQuickSwitch(config: QuickSwitchConfig): String =
+        completeViewOrder(config.order).joinToString(",") { view ->
+            if (view in config.enabled) view.name else "!${view.name}"
+        }
+
+    /** Keep the given order (de-duplicated), then append any views it omits. */
+    private fun completeViewOrder(seen: List<CalendarView>): List<CalendarView> {
+        val ordered = seen.distinct()
+        return ordered + IMPLEMENTED_VIEWS.filterNot { it in ordered }
+    }
+
     companion object {
         internal val THEME_MODE_KEY = stringPreferencesKey("theme_mode")
         internal val DYNAMIC_COLOR_KEY = booleanPreferencesKey("dynamic_color")
+        internal val BRAND_FONT_KEY = stringPreferencesKey("brand_font")
+        internal val PLAIN_FONT_KEY = stringPreferencesKey("plain_font")
+        internal val BRAND_FONT_STAMP_KEY = intPreferencesKey("brand_font_stamp")
+        internal val PLAIN_FONT_STAMP_KEY = intPreferencesKey("plain_font_stamp")
         internal val WEEK_START_KEY = stringPreferencesKey("week_start")
+        internal val AGENDA_SCREEN_RANGE_KEY = stringPreferencesKey("agenda_screen_range")
+        internal val AGENDA_WIDGET_RANGE_KEY = stringPreferencesKey("agenda_widget_range")
+        internal val AGENDA_SHOW_RANGE_BAR_KEY = booleanPreferencesKey("agenda_show_range_bar")
+        internal val TIME_FORMAT_KEY = stringPreferencesKey("time_format")
+        internal val SHOW_HOUR_LINES_KEY = booleanPreferencesKey("show_hour_lines")
+        internal val PAST_EVENT_DISPLAY_KEY = stringPreferencesKey("agenda_past_event_display")
+        internal val DIM_COMPLETED_EVENTS_KEY = booleanPreferencesKey("dim_completed_events")
+        internal val SHOW_WEEK_NUMBERS_KEY = booleanPreferencesKey("show_week_numbers")
+        internal val DEFAULT_VIEW_KEY = stringPreferencesKey("default_view")
+        internal val QUICK_SWITCH_VIEWS_KEY = stringPreferencesKey("quick_switch_views")
+        internal val DRAWER_VIEW_ORDER_KEY = stringPreferencesKey("drawer_view_order")
         internal val FORM_FIELDS_KEY = stringPreferencesKey("event_form_default_fields")
+        internal val AUTOFOCUS_EVENT_TITLE_KEY = booleanPreferencesKey("autofocus_event_title")
         internal val REMINDERS_ENABLED_KEY = booleanPreferencesKey("reminders_enabled")
         internal val REMINDER_ONBOARDING_KEY = booleanPreferencesKey("reminder_onboarding_done")
         internal val ALLOW_COLOR_UNSUPPORTED_KEY =
@@ -243,82 +695,128 @@ class SettingsPrefs @Inject constructor(
         /** 09:00 as minutes from midnight; the default all-day reminder fire time. */
         internal const val DEFAULT_ALLDAY_REMINDER_TIME = 540
         private const val MINUTES_PER_DAY = 1_440
+        internal val SNOOZE_MINUTES_KEY = intPreferencesKey("snooze_minutes")
+        /** Default snooze delay for the notification "Snooze" action. */
+        const val DEFAULT_SNOOZE_MINUTES = 10
         internal val CALENDAR_REMINDER_OVERRIDE_KEY =
             stringPreferencesKey("per_calendar_reminder_override")
         internal val CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY =
             stringPreferencesKey("per_calendar_allday_reminder_override")
         internal val DEFAULT_FORM_FIELDS =
             setOf(EventFormField.Location, EventFormField.Description)
+        internal val AUTO_BACKUP_ENABLED_KEY = booleanPreferencesKey("auto_backup_enabled")
+        internal val AUTO_BACKUP_INTERVAL_KEY = longPreferencesKey("auto_backup_interval_minutes")
+        internal val AUTO_BACKUP_FOLDER_KEY = stringPreferencesKey("auto_backup_folder_uri")
+        internal val AUTO_BACKUP_LAST_RUN_KEY = longPreferencesKey("auto_backup_last_run")
+        internal val AUTO_BACKUP_LAST_SUCCESS_KEY = booleanPreferencesKey("auto_backup_last_success")
+        internal val AUTO_BACKUP_FAILURES_KEY = intPreferencesKey("auto_backup_failures")
+        /** Default automatic-backup interval: daily. */
+        const val DEFAULT_BACKUP_INTERVAL = 1_440L
+        /** Floor for the automatic-backup interval (also above WorkManager's 15-min limit). */
+        const val MIN_BACKUP_INTERVAL = 30L
+
+        internal val SPECIAL_DATES_ENABLED_KEY = booleanPreferencesKey("special_dates_enabled")
+        internal val SPECIAL_DATES_SHOW_YEAR_KEY = booleanPreferencesKey("special_dates_show_year")
+        internal val SPECIAL_DATES_LAST_RUN_KEY = longPreferencesKey("special_dates_last_run")
+        internal val SPECIAL_DATES_STALLED_KEY = stringPreferencesKey("special_dates_stalled_reason")
+        internal val SPECIAL_DATES_LAST_FG_SYNC_KEY =
+            longPreferencesKey("special_dates_last_foreground_sync")
     }
 }
 
-/** A calendar's reminder-default override (see [SettingsPrefs.perCalendarReminderOverride]). */
-sealed interface CalendarReminderOverride {
-    /** No override — the calendar uses the global default. */
-    data object Inherit : CalendarReminderOverride
-    /** Explicit "no reminder" for this calendar, regardless of the global default. */
-    data object None : CalendarReminderOverride
-    /** A specific lead time in minutes before the event start. */
-    data class Minutes(val minutes: Int) : CalendarReminderOverride
+/** Snapshot of the special-dates mirror's last outcome (see [SettingsPrefs.specialDatesStatus]). */
+data class SpecialDatesStatus(
+    /** Epoch millis of the last sync, or 0 if it has never run. */
+    val lastRun: Long,
+    /** Non-null when the mirror is paused and why; null when healthy. */
+    val stalled: SpecialDatesStalledReason?,
+)
+
+/** Why the special-dates mirror is paused. */
+enum class SpecialDatesStalledReason {
+    /** READ_CONTACTS was revoked in system settings after the feature was enabled. */
+    PermissionRevoked,
 }
 
+/** Snapshot of the automatic backup's last outcome (see [SettingsPrefs.autoBackupStatus]). */
+data class BackupStatus(
+    /** Epoch millis of the last run, or 0 if it has never run. */
+    val lastRun: Long,
+    val lastSuccess: Boolean,
+    val consecutiveFailures: Int,
+)
+
 /**
- * The lead time to prefill on a new event: the matching per-calendar override
+ * The lead times to prefill on a new event: the matching per-calendar override
  * if [calendarId] has one for this event kind, otherwise the global default for
  * that kind. All-day events consult [allDayOverrides] / [allDayGlobal]; timed
- * events consult [timedOverrides] / [timedGlobal]. `null` = no reminder. Pure so
- * it can be unit-tested.
+ * events consult [timedOverrides] / [timedGlobal]. The empty list = no reminder.
+ * Pure so it can be unit-tested.
  */
 fun resolveDefaultReminder(
-    timedGlobal: Int?,
-    allDayGlobal: Int?,
-    timedOverrides: Map<Long, Int?>,
-    allDayOverrides: Map<Long, Int?>,
+    timedGlobal: List<Int>,
+    allDayGlobal: List<Int>,
+    timedOverrides: Map<Long, List<Int>>,
+    allDayOverrides: Map<Long, List<Int>>,
     calendarId: Long?,
     isAllDay: Boolean,
-): Int? {
+): List<Int> {
     val overrides = if (isAllDay) allDayOverrides else timedOverrides
     val global = if (isAllDay) allDayGlobal else timedGlobal
     return if (calendarId != null && overrides.containsKey(calendarId)) {
-        overrides[calendarId]
+        overrides.getValue(calendarId)
     } else {
         global
     }
 }
 
-/** Apply a [CalendarReminderOverride] to an override map ([Inherit] removes the key). */
-private fun MutableMap<Long, Int?>.applyOverride(
-    calendarId: Long,
-    override: CalendarReminderOverride,
-) {
-    when (override) {
-        CalendarReminderOverride.Inherit -> remove(calendarId)
-        CalendarReminderOverride.None -> put(calendarId, null)
-        is CalendarReminderOverride.Minutes -> put(calendarId, override.minutes)
+/** Sentinel stored for [WeekStartPref.Auto]; days store their [DayOfWeek.name]. */
+private const val WEEK_START_AUTO = "AUTO"
+
+private fun WeekStartPref.storageValue(): String = when (this) {
+    WeekStartPref.Auto -> WEEK_START_AUTO
+    is WeekStartPref.Day -> day.name
 }
+
+/**
+ * Parse the stored week-start value. "AUTO"/null/garbage → [WeekStartPref.Auto];
+ * a [DayOfWeek] name → [WeekStartPref.Day]. The legacy "MONDAY"/"SUNDAY" enum
+ * values migrate transparently, since both are valid day names.
+ */
+private fun parseWeekStart(stored: String?): WeekStartPref = when (stored) {
+    null, WEEK_START_AUTO -> WeekStartPref.Auto
+    else -> DayOfWeek.entries.firstOrNull { it.name == stored }
+        ?.let { WeekStartPref.Day(it) } ?: WeekStartPref.Auto
 }
 
 private const val NONE = "none"
 private const val ENTRY_SEP = ";"
 private const val KEY_VALUE_SEP = "="
+private const val LIST_SEP = ","
 
-private fun String?.toReminderMinutes(): Int? = when (this) {
-    null, "", NONE -> null
-    else -> toIntOrNull()
+/**
+ * The per-calendar override map codec, in Calendula's stored dialect
+ * (`id=minutes` entries joined by `;`, minutes comma-joined, `none` for an
+ * explicit no-reminder). The model and codec live in floret-kit; the dialect
+ * (fixed at release) stays here.
+ */
+private val reminderOverrideCodec =
+    ReminderOverrideCodec(entrySep = ENTRY_SEP, keyValueSep = KEY_VALUE_SEP, listSep = LIST_SEP, noneToken = NONE)
+
+/**
+ * Parse a stored reminder value into lead times. `null`/empty/"none" → empty
+ * list; a comma-joined list → its minutes; a legacy single value ("30") → a
+ * one-element list. Non-numeric parts are dropped defensively.
+ */
+private fun String?.toReminderList(): List<Int> = when {
+    this == null || isEmpty() || this == NONE -> emptyList()
+    else -> split(LIST_SEP).mapNotNull { it.trim().toIntOrNull() }.normalizeReminders()
 }
 
-private fun parseReminderOverrides(stored: String?): Map<Long, Int?> {
-    if (stored.isNullOrBlank()) return emptyMap()
-    return stored.split(ENTRY_SEP).mapNotNull { entry ->
-        val parts = entry.split(KEY_VALUE_SEP).takeIf { it.size == 2 } ?: return@mapNotNull null
-        val id = parts[0].toLongOrNull() ?: return@mapNotNull null
-        val value = if (parts[1] == NONE) null else parts[1].toIntOrNull() ?: return@mapNotNull null
-        id to value
-    }.toMap()
-}
+/** Serialise lead times for storage: "none" when empty, else comma-joined. */
+private fun List<Int>.toStoredReminders(): String =
+    if (isEmpty()) NONE else normalizeReminders().joinToString(LIST_SEP) { it.toString() }
 
-private fun serializeReminderOverrides(map: Map<Long, Int?>): String =
-    map.entries.joinToString(ENTRY_SEP) { (id, minutes) -> "$id$KEY_VALUE_SEP${minutes ?: NONE}" }
 
 private inline fun <reified E : Enum<E>> String?.toEnum(default: E): E =
     this?.let { stored -> enumValues<E>().firstOrNull { it.name == stored } } ?: default

app/src/main/java/de/jeanlucmakiola/calendula/data/reminders/EventReminderReceiver.kt

@@ -8,6 +8,7 @@ import android.content.pm.PackageManager
 import android.provider.CalendarContract
 import androidx.core.content.ContextCompat
 import dagger.hilt.android.AndroidEntryPoint
+import de.jeanlucmakiola.calendula.data.prefs.CalendarPrefs
 import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -16,6 +17,29 @@ import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
 import javax.inject.Inject
 
+/**
+ * True when [this] alert belongs to a calendar the user disabled in-app, so its
+ * reminder must be suppressed (mirroring the event filtering in
+ * CalendarRepositoryImpl). Alerts whose calendar is unknown (id 0L — e.g. a
+ * pre-upgrade snooze PendingIntent minted before EXTRA_CALENDAR_ID existed) are
+ * never treated as disabled. This is the one predicate the disabled-calendar
+ * gate is built from: [postableAlerts] here and the choke point in
+ * [ReminderNotifier.post] both use it.
+ */
+internal fun ReminderAlert.isForDisabledCalendar(disabledCalendarIds: Set<Long>): Boolean =
+    calendarId != 0L && calendarId in disabledCalendarIds
+
+/**
+ * The due alerts that should actually surface as notifications: everything
+ * except alerts whose calendar the user has disabled in-app. The caller still
+ * marks the full due set fired, so suppressed alerts are not re-broadcast by the
+ * provider.
+ */
+internal fun postableAlerts(
+    due: List<ReminderAlert>,
+    disabledCalendarIds: Set<Long>,
+): List<ReminderAlert> = due.filterNot { it.isForDisabledCalendar(disabledCalendarIds) }
+
 /**
  * Becomes the app that turns the calendar provider's reminder alarms into
  * visible notifications (the Etar model — the provider broadcasts
@@ -32,6 +56,8 @@ class EventReminderReceiver : BroadcastReceiver() {
     @Inject lateinit var alertStore: ReminderAlertStore
     @Inject lateinit var notifier: ReminderNotifier
     @Inject lateinit var settingsPrefs: SettingsPrefs
+    @Inject lateinit var calendarPrefs: CalendarPrefs
+    @Inject lateinit var suppressedStore: SuppressedReminderStore
 
     override fun onReceive(context: Context, intent: Intent) {
         if (intent.action != CalendarContract.ACTION_EVENT_REMINDER) return
@@ -46,8 +72,17 @@ class EventReminderReceiver : BroadcastReceiver() {
                 if (settingsPrefs.remindersEnabled.first()) {
                     val now = System.currentTimeMillis()
                     val due = alertStore.dueAlerts(now)
-                    due.forEach(notifier::post)
+                    val disabled = calendarPrefs.disabledCalendarIds.first()
+                    val postable = postableAlerts(due, disabled)
+                    // Suppress reminders for disabled calendars, but still mark
+                    // every due alert fired so the provider stops re-broadcasting
+                    // the suppressed ones. Stash those suppressed alerts so
+                    // re-enabling their calendar can recover them (they would
+                    // otherwise stay STATE_FIRED forever with no re-scan).
+                    postable.forEach { notifier.post(it) }
                     alertStore.markFired(due.map { it.alertId }, now)
+                    suppressedStore.stash(due - postable.toSet(), now)
+                    suppressedStore.purgeExpired(now)
                 }
             } finally {
                 pendingResult.finish()

app/src/main/java/de/jeanlucmakiola/calendula/data/reminders/ReminderActionReceiver.kt

@@ -0,0 +1,127 @@
+package de.jeanlucmakiola.calendula.data.reminders
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import dagger.hilt.android.AndroidEntryPoint
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Handles the "Snooze" and "Dismiss" actions on a reminder notification, plus
+ * the internal re-show when a snooze elapses. All three are app-internal
+ * intents (notification action buttons and our own [ReminderSnoozeScheduler]
+ * alarm), so the receiver is not exported.
+ *
+ * - **Dismiss** just cancels the notification — the `CalendarAlerts` row is
+ *   already fired, so nothing re-posts it.
+ * - **Snooze** cancels the notification and schedules an exact alarm to re-show
+ *   it after the user's snooze delay.
+ * - **Show** (the alarm) re-posts the same notification, so the user can snooze
+ *   or dismiss it again.
+ */
+@AndroidEntryPoint
+class ReminderActionReceiver : BroadcastReceiver() {
+
+    @Inject lateinit var notifier: ReminderNotifier
+    @Inject lateinit var scheduler: ReminderSnoozeScheduler
+    @Inject lateinit var settingsPrefs: SettingsPrefs
+
+    override fun onReceive(context: Context, intent: Intent) {
+        val alert = alertFrom(intent) ?: return
+        when (intent.action) {
+            ACTION_DISMISS -> notifier.cancel(alert)
+
+            ACTION_SNOOZE -> {
+                // Cancel now so the notification doesn't linger until the alarm;
+                // the snooze delay read is the only async work.
+                notifier.cancel(alert)
+                val pendingResult = goAsync()
+                CoroutineScope(SupervisorJob() + Dispatchers.IO).launch {
+                    try {
+                        val minutes = settingsPrefs.snoozeMinutes.first()
+                        val triggerAt = System.currentTimeMillis() + minutes * 60_000L
+                        scheduler.schedule(alert, triggerAt)
+                    } finally {
+                        pendingResult.finish()
+                    }
+                }
+            }
+
+            ACTION_SHOW -> {
+                val pendingResult = goAsync()
+                CoroutineScope(SupervisorJob() + Dispatchers.IO).launch {
+                    try {
+                        if (settingsPrefs.remindersEnabled.first() && notifier.canPost()) {
+                            notifier.post(alert)
+                        }
+                    } finally {
+                        pendingResult.finish()
+                    }
+                }
+            }
+        }
+    }
+
+    companion object {
+        const val ACTION_SNOOZE = "de.jeanlucmakiola.calendula.reminders.SNOOZE"
+        const val ACTION_DISMISS = "de.jeanlucmakiola.calendula.reminders.DISMISS"
+        const val ACTION_SHOW = "de.jeanlucmakiola.calendula.reminders.SHOW"
+
+        private const val EXTRA_ALERT_ID = "alert_id"
+        private const val EXTRA_EVENT_ID = "event_id"
+        private const val EXTRA_CALENDAR_ID = "calendar_id"
+        private const val EXTRA_BEGIN = "begin"
+        private const val EXTRA_END = "end"
+        private const val EXTRA_TITLE = "title"
+        private const val EXTRA_LOCATION = "location"
+        private const val EXTRA_ALL_DAY = "all_day"
+
+        /** An explicit intent to this receiver carrying [alert] as extras. */
+        fun intent(context: Context, action: String, alert: ReminderAlert): Intent =
+            Intent(context, ReminderActionReceiver::class.java).apply {
+                this.action = action
+                putExtra(EXTRA_ALERT_ID, alert.alertId)
+                putExtra(EXTRA_EVENT_ID, alert.eventId)
+                putExtra(EXTRA_CALENDAR_ID, alert.calendarId)
+                putExtra(EXTRA_BEGIN, alert.beginMillis)
+                putExtra(EXTRA_END, alert.endMillis)
+                putExtra(EXTRA_TITLE, alert.title)
+                putExtra(EXTRA_LOCATION, alert.location)
+                putExtra(EXTRA_ALL_DAY, alert.isAllDay)
+            }
+
+        /**
+         * A stable request code per (alert, action) so the three PendingIntents
+         * of one notification stay distinct and don't clobber each other.
+         */
+        fun requestCode(alert: ReminderAlert, action: String): Int {
+            val actionOffset = when (action) {
+                ACTION_SNOOZE -> 1
+                ACTION_DISMISS -> 2
+                ACTION_SHOW -> 3
+                else -> 0
+            }
+            return alert.alertId.toInt() * 8 + actionOffset
+        }
+
+        private fun alertFrom(intent: Intent): ReminderAlert? {
+            if (!intent.hasExtra(EXTRA_ALERT_ID)) return null
+            return ReminderAlert(
+                alertId = intent.getLongExtra(EXTRA_ALERT_ID, 0L),
+                eventId = intent.getLongExtra(EXTRA_EVENT_ID, 0L),
+                calendarId = intent.getLongExtra(EXTRA_CALENDAR_ID, 0L),
+                beginMillis = intent.getLongExtra(EXTRA_BEGIN, 0L),
+                endMillis = intent.getLongExtra(EXTRA_END, 0L),
+                title = intent.getStringExtra(EXTRA_TITLE).orEmpty(),
+                location = intent.getStringExtra(EXTRA_LOCATION),
+                isAllDay = intent.getBooleanExtra(EXTRA_ALL_DAY, false),
+            )
+        }
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/reminders/ReminderAlertStore.kt

@@ -16,6 +16,7 @@ import javax.inject.Singleton
 data class ReminderAlert(
     val alertId: Long,
     val eventId: Long,
+    val calendarId: Long,
     val beginMillis: Long,
     val endMillis: Long,
     /** Raw event title; may be blank — the notifier substitutes "(no title)". */
@@ -66,11 +67,12 @@ class AndroidReminderAlertStore @Inject constructor(
                     ReminderAlert(
                         alertId = c.getLong(0),
                         eventId = c.getLong(1),
-                        beginMillis = c.getLong(2),
-                        endMillis = c.getLong(3),
-                        title = c.getString(4).orEmpty(),
-                        location = c.getString(5)?.takeIf { it.isNotBlank() },
-                        isAllDay = c.getInt(6) == 1,
+                        calendarId = c.getLong(2),
+                        beginMillis = c.getLong(3),
+                        endMillis = c.getLong(4),
+                        title = c.getString(5).orEmpty(),
+                        location = c.getString(6)?.takeIf { it.isNotBlank() },
+                        isAllDay = c.getInt(7) == 1,
                     ),
                 )
             }
@@ -102,6 +104,7 @@ class AndroidReminderAlertStore @Inject constructor(
         val PROJECTION = arrayOf(
             CalendarContract.CalendarAlerts._ID,
             CalendarContract.CalendarAlerts.EVENT_ID,
+            CalendarContract.CalendarAlerts.CALENDAR_ID,
             CalendarContract.CalendarAlerts.BEGIN,
             CalendarContract.CalendarAlerts.END,
             CalendarContract.CalendarAlerts.TITLE,

app/src/main/java/de/jeanlucmakiola/calendula/data/reminders/ReminderNotifier.kt

@@ -14,6 +14,10 @@ import androidx.core.content.ContextCompat
 import dagger.hilt.android.qualifiers.ApplicationContext
 import de.jeanlucmakiola.calendula.MainActivity
 import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.data.prefs.CalendarPrefs
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.data.prefs.is24Hour
+import kotlinx.coroutines.flow.first
 import java.time.ZoneId
 import java.util.Locale
 import javax.inject.Inject
@@ -29,6 +33,8 @@ import javax.inject.Singleton
 @Singleton
 class ReminderNotifier @Inject constructor(
     @ApplicationContext private val context: Context,
+    private val settingsPrefs: SettingsPrefs,
+    private val calendarPrefs: CalendarPrefs,
 ) {
 
     /** False when the user declined `POST_NOTIFICATIONS` or muted the app. */
@@ -39,15 +45,23 @@ class ReminderNotifier @Inject constructor(
         return granted && NotificationManagerCompat.from(context).areNotificationsEnabled()
     }
 
-    fun post(alert: ReminderAlert) {
+    suspend fun post(alert: ReminderAlert) {
+        // The single choke point for the disabled-calendar gate: it covers both
+        // the provider broadcast (EventReminderReceiver) and a snoozed re-show
+        // (ReminderActionReceiver), so a calendar disabled after a snooze no
+        // longer notifies — without either receiver duplicating the check.
+        if (alert.isForDisabledCalendar(calendarPrefs.disabledCalendarIds.first())) return
         ensureChannel()
         val title = alert.title.ifBlank { context.getString(R.string.event_untitled) }
+        val is24Hour = settingsPrefs.timeFormat.first()
+            .is24Hour(android.text.format.DateFormat.is24HourFormat(context))
         val time = reminderTimeText(
             beginMillis = alert.beginMillis,
             endMillis = alert.endMillis,
             isAllDay = alert.isAllDay,
             zone = ZoneId.systemDefault(),
             locale = Locale.getDefault(),
+            is24Hour = is24Hour,
         )
         val text = listOfNotNull(time, alert.location).joinToString(" · ")
         val notification = NotificationCompat.Builder(context, CHANNEL_ID)
@@ -61,6 +75,16 @@ class ReminderNotifier @Inject constructor(
             .setAutoCancel(true)
             .setOnlyAlertOnce(true)
             .setContentIntent(detailIntent(alert))
+            .addAction(
+                R.drawable.ic_notification_snooze,
+                context.getString(R.string.reminder_action_snooze),
+                actionIntent(alert, ReminderActionReceiver.ACTION_SNOOZE),
+            )
+            .addAction(
+                R.drawable.ic_notification_dismiss,
+                context.getString(R.string.reminder_action_dismiss),
+                actionIntent(alert, ReminderActionReceiver.ACTION_DISMISS),
+            )
             .build()
         try {
             NotificationManagerCompat.from(context)
@@ -71,6 +95,19 @@ class ReminderNotifier @Inject constructor(
         }
     }
 
+    /** Remove a posted reminder (snooze re-shows it later; dismiss is final). */
+    fun cancel(alert: ReminderAlert) {
+        NotificationManagerCompat.from(context).cancel(alert.alertId.toString(), NOTIFICATION_ID)
+    }
+
+    private fun actionIntent(alert: ReminderAlert, action: String): PendingIntent =
+        PendingIntent.getBroadcast(
+            context,
+            ReminderActionReceiver.requestCode(alert, action),
+            ReminderActionReceiver.intent(context, action, alert),
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
+        )
+
     private fun detailIntent(alert: ReminderAlert): PendingIntent = PendingIntent.getActivity(
         context,
         /* requestCode = */ alert.alertId.toInt(),

app/src/main/java/de/jeanlucmakiola/calendula/data/reminders/ReminderSnoozeScheduler.kt

@@ -0,0 +1,55 @@
+package de.jeanlucmakiola.calendula.data.reminders
+
+import android.app.AlarmManager
+import android.app.PendingIntent
+import android.content.Context
+import android.os.Build
+import androidx.core.content.getSystemService
+import dagger.hilt.android.qualifiers.ApplicationContext
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Schedules a one-off exact alarm that re-shows a snoozed reminder.
+ *
+ * The app otherwise relies entirely on the calendar provider's `EVENT_REMINDER`
+ * broadcast (the Etar model), but a snoozed reminder has no provider backing —
+ * its `CalendarAlerts` row is already fired — so we must re-fire it ourselves.
+ * A snooze that lands late is a broken snooze, hence an *exact* alarm; we fall
+ * back to an inexact allow-while-idle alarm only if the OS withholds the
+ * exact-alarm capability (API 31–32 where the user revoked it).
+ */
+@Singleton
+class ReminderSnoozeScheduler @Inject constructor(
+    @ApplicationContext private val context: Context,
+) {
+
+    fun schedule(alert: ReminderAlert, triggerAtMillis: Long) {
+        val alarmManager = context.getSystemService<AlarmManager>() ?: return
+        val pendingIntent = PendingIntent.getBroadcast(
+            context,
+            ReminderActionReceiver.requestCode(alert, ReminderActionReceiver.ACTION_SHOW),
+            ReminderActionReceiver.intent(context, ReminderActionReceiver.ACTION_SHOW, alert),
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
+        )
+        if (canScheduleExact(alarmManager)) {
+            alarmManager.setExactAndAllowWhileIdle(
+                AlarmManager.RTC_WAKEUP, triggerAtMillis, pendingIntent,
+            )
+        } else {
+            // Exact alarms revoked (API 31–32): an inexact wake is the honest
+            // best we can do without nagging for SCHEDULE_EXACT_ALARM.
+            alarmManager.setAndAllowWhileIdle(
+                AlarmManager.RTC_WAKEUP, triggerAtMillis, pendingIntent,
+            )
+        }
+    }
+
+    /**
+     * True on API < 31 (no restriction), and on 31+ when the exact-alarm
+     * capability is held — auto-granted via `USE_EXACT_ALARM` on API 33+
+     * (Calendula is a calendar app), user-revocable on 31–32.
+     */
+    private fun canScheduleExact(alarmManager: AlarmManager): Boolean =
+        Build.VERSION.SDK_INT < Build.VERSION_CODES.S || alarmManager.canScheduleExactAlarms()
+}

app/src/main/java/de/jeanlucmakiola/calendula/data/reminders/ReminderTimeText.kt

@@ -1,5 +1,6 @@
 package de.jeanlucmakiola.calendula.data.reminders
 
+import de.jeanlucmakiola.calendula.ui.common.timeOfDayFormatter
 import java.time.Instant
 import java.time.ZoneId
 import java.time.ZoneOffset
@@ -25,6 +26,7 @@ fun reminderTimeText(
     isAllDay: Boolean,
     zone: ZoneId,
     locale: Locale,
+    is24Hour: Boolean,
 ): String {
     if (isAllDay) {
         val dateFormat = DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).withLocale(locale)
@@ -40,16 +42,18 @@ fun reminderTimeText(
         }
     }
 
-    val timeFormat = DateTimeFormatter.ofLocalizedTime(FormatStyle.SHORT).withLocale(locale)
+    val timeFormat = timeOfDayFormatter(is24Hour, locale)
     val begin = Instant.ofEpochMilli(beginMillis).atZone(zone)
     val end = Instant.ofEpochMilli(endMillis).atZone(zone)
     return if (begin.toLocalDate() == end.toLocalDate()) {
         timeFormat.format(begin) + RANGE + timeFormat.format(end)
     } else {
-        val dateTimeFormat = DateTimeFormatter
-            .ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT)
-            .withLocale(locale)
-        dateTimeFormat.format(begin) + RANGE + dateTimeFormat.format(end)
+        // Cross-day: medium date + the chosen short time, joined per side. Built
+        // from the two formatters (not ofLocalizedDateTime) so the 12/24h choice
+        // applies to the time portion too.
+        val dateFormat = DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).withLocale(locale)
+        val dateTime = { z: java.time.ZonedDateTime -> "${dateFormat.format(z)}, ${timeFormat.format(z)}" }
+        dateTime(begin) + RANGE + dateTime(end)
     }
 }
 

app/src/main/java/de/jeanlucmakiola/calendula/data/reminders/SuppressedReminderStore.kt

@@ -0,0 +1,130 @@
+package de.jeanlucmakiola.calendula.data.reminders
+
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.MutablePreferences
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringSetPreferencesKey
+import java.util.Base64
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Still relevant while the event has not ended: a reminder for an event that is
+ * already over is pointless to re-surface. Falls back to the begin time when the
+ * end is unknown (0L). Used both to decide what to re-post and to purge the stash.
+ */
+internal fun ReminderAlert.isRelevantAt(nowMillis: Long): Boolean =
+    (endMillis.takeIf { it > 0L } ?: beginMillis) >= nowMillis
+
+/**
+ * Local stash of reminder alerts that fired while their calendar was disabled
+ * in-app. [EventReminderReceiver] marks every due alert `STATE_FIRED` regardless
+ * (so the provider stops re-broadcasting the suppressed ones), which would
+ * otherwise lose those reminders forever — there is no re-scan. Stashing lets
+ * [de.jeanlucmakiola.calendula.ui.calendars.CalendarsViewModel] re-post them if
+ * the user re-enables the calendar before the event is over.
+ *
+ * Persisted in the shared preferences DataStore as a set of self-describing
+ * strings (one per alert); the stash never reaches a screen, so there is no
+ * domain model. Entries whose event has already ended are dropped on the next
+ * stash/recover/purge, so the stash only ever holds a handful of pending alerts.
+ */
+@Singleton
+class SuppressedReminderStore @Inject constructor(
+    private val store: DataStore<Preferences>,
+) {
+
+    /** Add [alerts] to the stash, replacing any existing entry with the same id. */
+    suspend fun stash(alerts: List<ReminderAlert>, nowMillis: Long) {
+        if (alerts.isEmpty()) return
+        store.edit { prefs ->
+            val byId = decodeAll(prefs).associateByTo(mutableMapOf()) { it.alertId }
+            alerts.forEach { byId[it.alertId] = it }
+            prefs.putStash(byId.values.filter { it.isRelevantAt(nowMillis) })
+        }
+    }
+
+    /**
+     * Remove and return the still-relevant stashed alerts belonging to any of
+     * [calendarIds]; drops expired entries for every calendar in passing.
+     */
+    suspend fun recoverFor(calendarIds: Set<Long>, nowMillis: Long): List<ReminderAlert> {
+        val recovered = mutableListOf<ReminderAlert>()
+        store.edit { prefs ->
+            val kept = decodeAll(prefs).filter { alert ->
+                when {
+                    !alert.isRelevantAt(nowMillis) -> false // expired: drop
+                    alert.calendarId in calendarIds -> { recovered += alert; false }
+                    else -> true
+                }
+            }
+            prefs.putStash(kept)
+        }
+        return recovered
+    }
+
+    /** Drop entries whose event has already ended — cheap opportunistic cleanup. */
+    suspend fun purgeExpired(nowMillis: Long) {
+        store.edit { prefs ->
+            prefs.putStash(decodeAll(prefs).filter { it.isRelevantAt(nowMillis) })
+        }
+    }
+
+    private fun decodeAll(prefs: Preferences): List<ReminderAlert> =
+        prefs[KEY].orEmpty().mapNotNull { decodeStashEntry(it) }
+
+    private fun MutablePreferences.putStash(alerts: List<ReminderAlert>) {
+        val encoded = alerts.map { encodeStashEntry(it) }.toSet()
+        if (encoded.isEmpty()) remove(KEY) else set(KEY, encoded)
+    }
+
+    private companion object {
+        val KEY = stringSetPreferencesKey("suppressed_reminders")
+    }
+}
+
+// One stash entry as a delimited string. The '|' separator is safe because every
+// free-text field is Base64-encoded first (that alphabet never contains '|'), and
+// a null location is stored as a distinct sentinel that Base64 also never yields.
+private const val FIELD_SEP = "|"
+private const val NULL_LOCATION = "-"
+
+internal fun encodeStashEntry(alert: ReminderAlert): String = listOf(
+    alert.alertId.toString(),
+    alert.eventId.toString(),
+    alert.calendarId.toString(),
+    alert.beginMillis.toString(),
+    alert.endMillis.toString(),
+    if (alert.isAllDay) "1" else "0",
+    alert.title.toBase64(),
+    alert.location?.toBase64() ?: NULL_LOCATION,
+).joinToString(FIELD_SEP)
+
+/** Reverse of [encodeStashEntry]; returns null for a malformed entry (dropped). */
+internal fun decodeStashEntry(raw: String): ReminderAlert? {
+    val parts = raw.split(FIELD_SEP)
+    if (parts.size != 8) return null
+    return try {
+        ReminderAlert(
+            alertId = parts[0].toLong(),
+            eventId = parts[1].toLong(),
+            calendarId = parts[2].toLong(),
+            beginMillis = parts[3].toLong(),
+            endMillis = parts[4].toLong(),
+            title = parts[6].fromBase64(),
+            location = parts[7].takeIf { it != NULL_LOCATION }?.fromBase64(),
+            isAllDay = parts[5] == "1",
+        )
+    } catch (e: NumberFormatException) {
+        null
+    } catch (e: IllegalArgumentException) { // bad Base64
+        null
+    }
+}
+
+private fun String.toBase64(): String =
+    Base64.getEncoder().encodeToString(toByteArray(Charsets.UTF_8))
+
+private fun String.fromBase64(): String =
+    String(Base64.getDecoder().decode(this), Charsets.UTF_8)

app/src/main/java/de/jeanlucmakiola/calendula/domain/EventForm.kt

@@ -41,6 +41,27 @@ data class EventForm(
      */
     val colorKey: String? = null,
     val color: Int? = null,
+    /**
+     * Guests the user has added/kept on the event. Calendula only writes these
+     * `Attendees` rows — it has no INTERNET and never sends an invitation
+     * itself; whether a guest is notified is decided downstream by the
+     * calendar's backend (local: no one; CalDAV/Google: the server/account).
+     * Read-only rows the form doesn't model (the organizer, resources) are
+     * preserved by the data layer, not carried here.
+     */
+    val attendees: List<EventAttendee> = emptyList(),
+)
+
+/**
+ * One editable guest: the user controls the [email] (the identity we dedup and
+ * write on), an optional display [name], and whether they're [optional] rather
+ * than required. Response status and the organizer/resource distinction are not
+ * user-editable, so they aren't modelled here.
+ */
+data class EventAttendee(
+    val email: String,
+    val name: String = "",
+    val optional: Boolean = false,
 )
 
 /**
@@ -55,6 +76,7 @@ enum class EventFormField {
     Availability,
     Visibility,
     Color,
+    Attendees,
 }
 
 enum class EventFormProblem {
@@ -108,6 +130,24 @@ fun EventDetail.toEditForm(beginMillis: Long, endMillis: Long, zone: TimeZone):
         // calendar's colour.
         colorKey = eventColorKey,
         color = eventColor,
+        // Only editable guests ride in the form: drop the organizer and
+        // resource rows (not user-editable) and any without an email (we key
+        // edits and dedup on the address). The data layer preserves the rows we
+        // don't carry here, so they're never clobbered on save.
+        attendees = attendees
+            .filter {
+                it.relationship != AttendeeRelationship.Organizer &&
+                    it.type != AttendeeType.Resource
+            }
+            .mapNotNull { a ->
+                a.email?.takeIf { it.isNotBlank() }?.let { email ->
+                    EventAttendee(
+                        email = email,
+                        name = a.name,
+                        optional = a.type == AttendeeType.Optional,
+                    )
+                }
+            },
     )
 }
 
@@ -117,9 +157,10 @@ fun EventDetail.toEditForm(beginMillis: Long, endMillis: Long, zone: TimeZone):
  * while the form was open. The raw row times ride along because
  * [toEditForm] derives the form's times from the *tapped occurrence*, so
  * re-deriving with the same occurrence would mask an externally moved
- * event. Not covered (the form can't write them, and the dirty-checked
- * write can't clobber them): attendees, status, the user's own response,
- * reminder methods, and a recurring event's duration.
+ * event. Guests are covered (the form writes editable attendees), so an
+ * external attendee change now also trips the conflict check. Still not
+ * covered: status, the user's own response, reminder methods, the
+ * organizer/resource rows, and a recurring event's duration.
  */
 data class EditSnapshot(
     val form: EventForm,
@@ -148,6 +189,7 @@ fun EventForm.populatedFields(): Set<EventFormField> = buildSet {
     if (availability != Availability.Busy) add(EventFormField.Availability)
     if (accessLevel != AccessLevel.Default) add(EventFormField.Visibility)
     if (colorKey != null || color != null) add(EventFormField.Color)
+    if (attendees.isNotEmpty()) add(EventFormField.Attendees)
 }
 
 fun EventForm.problems(): Set<EventFormProblem> = buildSet {

app/src/main/java/de/jeanlucmakiola/calendula/domain/FontRole.kt

@@ -0,0 +1,8 @@
+package de.jeanlucmakiola.calendula.domain
+
+/**
+ * The two Material 3 typeface roles a user can set independently (issue #19):
+ * [BRAND] drives the display/headline styles (expression), [PLAIN] the
+ * title/body/label styles (readability). Each defaults to the system typeface.
+ */
+enum class FontRole { BRAND, PLAIN }

app/src/main/java/de/jeanlucmakiola/calendula/domain/InsertEventForm.kt

@@ -0,0 +1,76 @@
+package de.jeanlucmakiola.calendula.domain
+
+import kotlinx.datetime.LocalDate
+import kotlinx.datetime.LocalDateTime
+import kotlinx.datetime.LocalTime
+import kotlinx.datetime.TimeZone
+import kotlinx.datetime.toInstant
+import kotlinx.datetime.toLocalDateTime
+import kotlin.time.Duration.Companion.hours
+import kotlin.time.Instant
+
+/**
+ * Build a prefilled [EventForm] from an `ACTION_INSERT` intent's extras (issue
+ * #30). External apps and widgets (e.g. the Todo Agenda widget) launch the
+ * calendar this way to create a new event, passing the fields as
+ * [android.provider.CalendarContract] extras. Any field the intent omits falls
+ * back to the same defaults the in-app "new event" uses — a timed start at the
+ * next full hour and a one-hour duration. [EventForm.calendarId] is left null so
+ * it resolves to the last-used / first-writable calendar, exactly like the
+ * `.ics` single-event and plain new-event paths.
+ *
+ * Pure (no Android types) so it is unit-testable; the intent parsing that reads
+ * the extras lives in `MainActivity.insertFormOrNull`.
+ */
+fun buildInsertEventForm(
+    beginMillis: Long?,
+    endMillis: Long?,
+    isAllDay: Boolean,
+    title: String?,
+    description: String?,
+    location: String?,
+    rrule: String?,
+    zone: TimeZone,
+    now: Instant,
+): EventForm {
+    val (start, end) = if (isAllDay) {
+        // All-day provider times are UTC midnights with an exclusive end; show
+        // the last covered day and keep placeholder wall-clock times in case the
+        // user switches the event to timed (mirrors EventDetail.toEditForm).
+        val startDate = beginMillis
+            ?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(TimeZone.UTC).date }
+            ?: now.toLocalDateTime(zone).date
+        val endDate = endMillis
+            ?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(TimeZone.UTC).date }
+            ?.let { exclusive -> maxOf(startDate, LocalDate.fromEpochDays(exclusive.toEpochDays() - 1)) }
+            ?: startDate
+        LocalDateTime(startDate, LocalTime(9, 0)) to LocalDateTime(endDate, LocalTime(10, 0))
+    } else {
+        val startTime = beginMillis
+            ?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(zone) }
+            ?: nextFullHour(now, zone)
+        val endTime = endMillis
+            ?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(zone) }
+            ?.takeIf { it >= startTime }
+            ?: (startTime.toInstant(zone) + 1.hours).toLocalDateTime(zone)
+        startTime to endTime
+    }
+    return EventForm(
+        calendarId = null,
+        title = title.orEmpty(),
+        isAllDay = isAllDay,
+        start = start,
+        end = end,
+        location = location.orEmpty(),
+        description = description.orEmpty(),
+        // Bare RRULE value (Events.RRULE convention); tolerate a leading "RRULE:"
+        // some callers include.
+        rrule = rrule?.removePrefix("RRULE:")?.takeIf { it.isNotBlank() },
+    )
+}
+
+private fun nextFullHour(now: Instant, zone: TimeZone): LocalDateTime {
+    val hourMillis = 3_600_000L
+    val rounded = (now.toEpochMilliseconds() / hourMillis + 1) * hourMillis
+    return Instant.fromEpochMilliseconds(rounded).toLocalDateTime(zone)
+}

app/src/main/java/de/jeanlucmakiola/calendula/domain/Models.kt

@@ -26,6 +26,14 @@ data class CalendarSource(
      * owns for its own calendars). Always null for synced calendars.
      */
     val description: String? = null,
+    /**
+     * A special-dates mirror calendar the app manages (birthdays/anniversaries
+     * from contacts). Its events' title/date/recurrence are owned by the sync,
+     * so it's hidden from the new-event calendar picker and its events lock those
+     * fields in the editor. Recognised by a durable provider marker, so it holds
+     * even after a backup restore clears the app's stored ids.
+     */
+    val isManaged: Boolean = false,
 )
 
 data class EventInstance(
@@ -40,6 +48,14 @@ data class EventInstance(
     val location: String?,
 )
 
+/**
+ * Whether this event has finished relative to [now] — its end is at or before
+ * the current instant. An in-progress event (already started but not yet ended)
+ * is *not* considered ended. All-day events end at the exclusive next-midnight,
+ * so they only count as ended once their day is fully over.
+ */
+fun EventInstance.hasEnded(now: Instant): Boolean = end <= now
+
 data class EventDetail(
     val instance: EventInstance,
     val description: String?,

app/src/main/java/de/jeanlucmakiola/calendula/domain/contacts/ContactSpecialDate.kt

@@ -0,0 +1,122 @@
+package de.jeanlucmakiola.calendula.domain.contacts
+
+import java.time.LocalDate
+
+/**
+ * The kinds of contact "special date" Calendula mirrors into local calendars.
+ * Each kind gets its own local calendar, so it inherits per-calendar colour,
+ * visibility and reminder defaults for free. See
+ * docs/design/contact-special-dates.md.
+ */
+enum class SpecialDateType {
+    Birthday,
+    Anniversary,
+
+    /** Everything else — a contact "Event" that is neither birthday nor anniversary. */
+    Custom,
+}
+
+/**
+ * One dated event read from a device contact (a `ContactsContract` `Event`
+ * row). The [lookupKey] is the stable contact identity used to reconcile the
+ * mirror without duplicating; [year] is null when the contact stored the date
+ * without one (`--MM-dd`), in which case age can't be shown.
+ */
+data class ContactSpecialDate(
+    val lookupKey: String,
+    val displayName: String,
+    val type: SpecialDateType,
+    val month: Int,
+    val day: Int,
+    val year: Int?,
+    /** The contact's custom label for a [SpecialDateType.Custom] date, if any. */
+    val label: String? = null,
+)
+
+/** The parsed month/day (+ optional year) of a contact date. */
+data class ContactDateParts(val year: Int?, val month: Int, val day: Int)
+
+/**
+ * A fixed leap year to validate and anchor year-less dates against, so that a
+ * `--02-29` birthday is representable (and, once anchored, only recurs in leap
+ * years — matching how the calendar provider expands a yearly Feb-29 series).
+ */
+const val YEARLESS_ANCHOR_YEAR = 1972
+
+/**
+ * Parse a `ContactsContract.CommonDataKinds.Event.START_DATE` value into its
+ * calendar parts, or null if it isn't a usable date. Handles the three shapes
+ * seen in the wild:
+ * - full `yyyy-MM-dd` (year known),
+ * - year-less `--MM-dd` (year null),
+ * - compact `yyyyMMdd`.
+ *
+ * A date that names an impossible day (e.g. `1999-02-29`) is rejected. Pure, so
+ * it's unit-tested without a device.
+ */
+fun parseContactEventDate(raw: String?): ContactDateParts? {
+    val s = raw?.trim().orEmpty()
+    if (s.isEmpty()) return null
+
+    // Year-less: "--MM-dd" or "--MMdd".
+    if (s.startsWith("--")) {
+        val (m, d) = parseMonthDay(s.substring(2)) ?: return null
+        return validated(null, m, d)
+    }
+
+    if (s.contains('-')) {
+        val parts = s.split('-').filter { it.isNotEmpty() }
+        return when (parts.size) {
+            // "yyyy-MM-dd" — but a leading '-' would have dropped the empty
+            // first part, so require the first token to look like a year.
+            3 -> if (s.startsWith('-')) null else validated(
+                year = parts[0].toIntOrNull() ?: return null,
+                month = parts[1].toIntOrNull() ?: return null,
+                day = parts[2].toIntOrNull() ?: return null,
+            )
+            // Year-less "MM-dd" without the "--" prefix.
+            2 -> validated(
+                year = null,
+                month = parts[0].toIntOrNull() ?: return null,
+                day = parts[1].toIntOrNull() ?: return null,
+            )
+            else -> null
+        }
+    }
+
+    // Compact "yyyyMMdd".
+    if (s.length == 8 && s.all { it.isDigit() }) {
+        return validated(
+            year = s.substring(0, 4).toInt(),
+            month = s.substring(4, 6).toInt(),
+            day = s.substring(6, 8).toInt(),
+        )
+    }
+
+    return null
+}
+
+/** "MM-dd" or compact "MMdd". */
+private fun parseMonthDay(rest: String): Pair<Int, Int>? {
+    if (rest.contains('-')) {
+        val p = rest.split('-').filter { it.isNotEmpty() }
+        if (p.size != 2) return null
+        return (p[0].toIntOrNull() ?: return null) to (p[1].toIntOrNull() ?: return null)
+    }
+    if (rest.length == 4 && rest.all { it.isDigit() }) {
+        return rest.substring(0, 2).toInt() to rest.substring(2, 4).toInt()
+    }
+    return null
+}
+
+/**
+ * Confirm month/day form a real calendar date (validated against the actual
+ * year when known, otherwise the leap anchor so `02-29` survives).
+ */
+private fun validated(year: Int?, month: Int, day: Int): ContactDateParts? {
+    if (month !in 1..12 || day !in 1..31) return null
+    val checkYear = year ?: YEARLESS_ANCHOR_YEAR
+    return runCatching { LocalDate.of(checkYear, month, day) }
+        .map { ContactDateParts(year, month, day) }
+        .getOrNull()
+}

app/src/main/java/de/jeanlucmakiola/calendula/domain/contacts/SpecialDateFormatting.kt

@@ -0,0 +1,65 @@
+package de.jeanlucmakiola.calendula.domain.contacts
+
+import kotlinx.datetime.LocalDate
+
+/**
+ * Prefix of every managed-event `UID_2445`. Distinguishes mirror events from
+ * user-created ones (which carry a random `<uuid>@calendula` UID), so the sync
+ * only ever reconciles — and never deletes — events it actually owns.
+ */
+const val MANAGED_UID_PREFIX = "contact-"
+
+/**
+ * The deterministic `Events.UID_2445` that ties a mirrored event to its source
+ * contact date. Stable across syncs (the reconciliation key), namespaced by
+ * type so the same contact's birthday and anniversary never collide, and — when
+ * a [discriminator] is given — by it too, so two Custom dates on one contact
+ * (e.g. "Wedding" and "Graduation") get distinct events instead of clobbering
+ * each other.
+ */
+fun managedEventUid(type: SpecialDateType, lookupKey: String, discriminator: String? = null): String {
+    val disc = discriminator?.takeIf { it.isNotBlank() }?.let { ":$it" }.orEmpty()
+    return "$MANAGED_UID_PREFIX${type.name.lowercase()}:$lookupKey$disc@calendula"
+}
+
+/**
+ * The reconciliation key for this date's mirrored event. Birthdays/anniversaries
+ * are one-per-contact, so they key on the contact alone; a [SpecialDateType.Custom]
+ * date adds a discriminator (its label, else its month-day) so distinct custom
+ * dates on one contact don't collapse into a single event.
+ */
+fun ContactSpecialDate.managedUid(): String =
+    managedEventUid(type, lookupKey, customDiscriminator())
+
+private fun ContactSpecialDate.customDiscriminator(): String? =
+    if (type == SpecialDateType.Custom) {
+        label?.trim()?.lowercase()?.ifBlank { null } ?: "%02d-%02d".format(month, day)
+    } else {
+        null
+    }
+
+/**
+ * The all-day date the recurring `FREQ=YEARLY` series is anchored at: the real
+ * date when the year is known (so age can be derived), otherwise the month/day
+ * on a fixed leap anchor year so a `--02-29` date stays representable and the
+ * anchor never drifts between syncs.
+ */
+fun ContactSpecialDate.anchorDate(): LocalDate =
+    LocalDate(year ?: YEARLESS_ANCHOR_YEAR, month, day)
+
+/**
+ * Render a title [template] for a contact, substituting `{name}` and `{year}`
+ * (the source year — a birthday's birth year or an anniversary's start year;
+ * empty when [year] is null). Unlike an age, the year is static and correct on
+ * every occurrence of the yearly event. Collapses the whitespace an empty
+ * `{year}` may leave behind, so "{name}'s birthday ({year})" degrades cleanly to
+ * "Jane's birthday" when no year is known.
+ */
+fun renderSpecialDateTitle(template: String, name: String, year: Int?): String =
+    template
+        .replace("{name}", name)
+        .replace("{year}", year?.toString().orEmpty())
+        // Drop an empty "()" left by an unresolved {year}, then tidy spacing.
+        .replace(Regex("""\(\s*\)"""), "")
+        .replace(Regex("""\s+"""), " ")
+        .trim()

app/src/main/java/de/jeanlucmakiola/calendula/qs/NewEventTileService.kt

@@ -0,0 +1,43 @@
+package de.jeanlucmakiola.calendula.qs
+
+import android.app.PendingIntent
+import android.os.Build
+import android.service.quicksettings.TileService
+import de.jeanlucmakiola.calendula.MainActivity
+import kotlinx.datetime.TimeZone
+import kotlinx.datetime.toLocalDateTime
+import kotlin.time.Clock
+
+/**
+ * Quick Settings tile: tapping it opens the create-event form on today — the
+ * same action as the launcher "New event" shortcut and the agenda widget's "+".
+ * A stateless action tile, so there is no on/off state to keep in sync.
+ */
+class NewEventTileService : TileService() {
+
+    // The pre-34 branch intentionally uses the deprecated Intent overload: it is
+    // the only form available below UpsideDownCake, and is reached only there.
+    @Suppress("DEPRECATION", "StartActivityAndCollapseDeprecated")
+    override fun onClick() {
+        super.onClick()
+        val today = Clock.System.now()
+            .toLocalDateTime(TimeZone.currentSystemDefault()).date
+        val intent = MainActivity.openCreateIntent(this, today)
+        // Launch only once the device is unlocked: creating an event behind the
+        // keyguard makes no sense, and the shade can't start an activity over a
+        // locked screen anyway.
+        unlockAndRun {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
+                val pending = PendingIntent.getActivity(
+                    this,
+                    0,
+                    intent,
+                    PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT,
+                )
+                startActivityAndCollapse(pending)
+            } else {
+                startActivityAndCollapse(intent)
+            }
+        }
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/CalendarHost.kt

@@ -1,5 +1,7 @@
 package de.jeanlucmakiola.calendula.ui
 
+import androidx.activity.compose.BackHandler
+import androidx.compose.animation.AnimatedContent
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
@@ -12,20 +14,28 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.listSaver
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.domain.EventForm
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.ui.agenda.AgendaScreen
 import de.jeanlucmakiola.calendula.ui.calendars.CalendarsScreen
+import de.jeanlucmakiola.floret.identity.fadeThrough
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
+import de.jeanlucmakiola.calendula.ui.common.drillToDay
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarSlideSpec
+import de.jeanlucmakiola.calendula.ui.common.selectView
+import de.jeanlucmakiola.calendula.ui.common.viewBaseStack
 import de.jeanlucmakiola.calendula.ui.day.DayScreen
 import de.jeanlucmakiola.calendula.ui.detail.EventDetailScreen
 import de.jeanlucmakiola.calendula.ui.edit.EventEditScreen
 import de.jeanlucmakiola.calendula.ui.imports.ImportScreen
 import de.jeanlucmakiola.calendula.ui.month.MonthScreen
+import de.jeanlucmakiola.calendula.ui.search.SearchScreen
 import de.jeanlucmakiola.calendula.ui.settings.SettingsScreen
 import de.jeanlucmakiola.calendula.ui.week.WeekScreen
 import kotlinx.datetime.LocalDate
@@ -34,14 +44,24 @@ import kotlinx.datetime.toLocalDateTime
 import kotlin.time.Clock
 
 /**
- * Holds the active top-level view (spec M1) and swaps between the calendar
+ * Holds the top-level view back stack (spec M1) and swaps between the calendar
  * screens. Each screen owns its own ViewModel and date anchor; the view-switcher
  * pill in their top bars writes back here via [onSelectView].
  *
+ * The stack's bottom is the user's [CalendarHostViewModel.defaultView] home view.
+ * A lateral switch (pill / drawer) builds a visit history so back retraces it
+ * (see [selectView]); a widget launch resets the stack to its own view; a date
+ * tap drills the day view on top. Pressing back pops one level, and the
+ * base-level [BackHandler] hands off to the system to exit once only the home
+ * view remains. So back from a widget-opened screen returns to that widget's
+ * view, then home; and back through pill switches walks the views in reverse.
+ *
  * [requestedDetailKey] is an externally requested occurrence (a tapped
  * reminder notification routed through MainActivity): it opens the detail
  * overlay exactly like an event tap and is cleared via [onDetailKeyConsumed]
- * so a later recomposition can't re-open it.
+ * so a later recomposition can't re-open it. (A widget event tap instead arrives
+ * as [WidgetNavRequest.OpenEvent], which also roots the back stack in the
+ * widget's view.)
  */
 @Composable
 fun CalendarHost(
@@ -52,15 +72,31 @@ fun CalendarHost(
     onWidgetNavConsumed: () -> Unit = {},
     requestedImportUri: android.net.Uri? = null,
     onImportConsumed: () -> Unit = {},
+    requestedInsertForm: EventForm? = null,
+    onInsertConsumed: () -> Unit = {},
+    viewModel: CalendarHostViewModel = hiltViewModel(),
 ) {
-    var view by rememberSaveable { mutableStateOf(CalendarView.Week) }
-    val onSelectView: (CalendarView) -> Unit = { view = it }
+    // Wait for the persisted default view before seeding the stack, so the app
+    // opens straight on the user's choice instead of flashing a placeholder and
+    // correcting it. Brief blank first frame, matching the onboarding gate above.
+    val defaultView = viewModel.defaultView.collectAsStateWithLifecycle().value ?: return
+
+    // View customisation (#24): the quick-switch cycle and drawer order. Both have
+    // sensible non-empty initial values, so they're ready before the first frame.
+    val quickSwitchViews = viewModel.quickSwitchViews.collectAsStateWithLifecycle().value
+    val drawerViewOrder = viewModel.drawerViewOrder.collectAsStateWithLifecycle().value
+
+    var viewStack by rememberSaveable(stateSaver = viewStackSaver) {
+        mutableStateOf(listOf(defaultView))
+    }
+    val view = viewStack.last()
+    val onSelectView: (CalendarView) -> Unit = { viewStack = viewStack.selectView(it) }
 
     // Tapping a day in the month grid opens the day view anchored to that date.
     var pendingDayIso by rememberSaveable { mutableStateOf<String?>(null) }
     val onOpenDay: (LocalDate) -> Unit = { date ->
         pendingDayIso = date.toString()
-        view = CalendarView.Day
+        viewStack = viewStack.drillToDay()
     }
 
     // The event-detail screen (S4) is a full-screen destination hoisted here so
@@ -97,6 +133,12 @@ fun CalendarHost(
     var showSettings by rememberSaveable { mutableStateOf(false) }
     val onOpenSettings = { showSettings = true }
 
+    // Full-text search — its own overlay, opened from each calendar screen's
+    // top bar. Sits below the detail/edit overlays so tapping a result reveals
+    // the detail on top and backing out returns to the results.
+    var showSearch by rememberSaveable { mutableStateOf(false) }
+    val onOpenSearch = { showSearch = true }
+
     // Calendar manager (reached from Settings) — its own overlay so it slides
     // over Settings and survives view switches.
     var showCalendars by rememberSaveable { mutableStateOf(false) }
@@ -130,23 +172,86 @@ fun CalendarHost(
     // picker (many). A plain conditional overlay (no slide) — it's transient.
     var importUri by remember { mutableStateOf<android.net.Uri?>(null) }
     var importForm by remember { mutableStateOf<EventForm?>(null) }
+    // A restore (in-app "Restore from .ics" button) always runs the full import
+    // flow — picker + summary — even for a single-event file, because the intent
+    // is "restore a backup", not "add this one event". An externally opened .ics
+    // keeps routing a single event straight into the prefilled create form.
+    var importForceMany by remember { mutableStateOf(false) }
     LaunchedEffect(requestedImportUri) {
         if (requestedImportUri != null) {
             importUri = requestedImportUri
+            importForceMany = false
             onImportConsumed()
         }
     }
+    // An external ACTION_INSERT launch (another app/widget creating an event,
+    // issue #30) arrives already prefilled — open it in the same create form the
+    // single-event .ics path uses. [importForm] is the topmost overlay, so it
+    // reveals on top of whatever was open without extra dismissal.
+    LaunchedEffect(requestedInsertForm) {
+        if (requestedInsertForm != null) {
+            importForm = requestedInsertForm
+            onInsertConsumed()
+        }
+    }
 
-    // A home-screen widget launch asks to open a date (→ day view) or start a
-    // create. Handled once and cleared, mirroring [requestedDetailKey].
+    // Close every overlay that can sit over the calendar, so an externally
+    // requested destination (a widget/shortcut/QS-tile launch) is revealed on
+    // top instead of underneath whatever the user had open.
+    fun dismissCoveringOverlays() {
+        showSettings = false
+        showCalendars = false
+        detailKey = null
+        editKey = null
+        importUri = null
+        importForm = null
+    }
+
+    // A home-screen widget launch asks to open a date (→ day view), open an
+    // event's detail, or start a create. Handled once and cleared, mirroring
+    // [requestedDetailKey]. Date/event opens root the stack in the widget's own
+    // view so backing out returns there (then home), not to the default.
     LaunchedEffect(widgetNavRequest) {
         when (val req = widgetNavRequest) {
             is WidgetNavRequest.OpenDate -> {
+                // Drill the day view in over the widget's view: drop any overlay
+                // that would cover it, so the open doesn't land under Settings/form.
+                dismissCoveringOverlays()
+                createDateIso = null
                 pendingDayIso = req.dateIso
-                view = CalendarView.Day
+                // No widget source (an external date tap) roots over the default
+                // home view, so backing out of the day returns home then exits.
+                viewStack = viewBaseStack(defaultView, req.source ?: defaultView).drillToDay()
+                onWidgetNavConsumed()
+            }
+            is WidgetNavRequest.OpenEvent -> {
+                // Root the stack in the widget's view, then open the occurrence
+                // detail over it (same key shape as a tapped event / reminder).
+                dismissCoveringOverlays()
+                createDateIso = null
+                viewStack = viewBaseStack(defaultView, req.source)
+                val key = longArrayOf(req.eventId, req.beginMillis, req.endMillis)
+                heldKey = key
+                detailKey = key
+                onWidgetNavConsumed()
+            }
+            is WidgetNavRequest.OpenView -> {
+                // A widget header tap: land on a top-level view with no date
+                // drill-in. Reveal it by dropping any covering overlay, then root
+                // the stack on the target (null → the default home) over the
+                // default home — so backing out returns to the default, then exits.
+                dismissCoveringOverlays()
+                createDateIso = null
+                pendingDayIso = null
+                viewStack = viewBaseStack(defaultView, req.view ?: defaultView)
                 onWidgetNavConsumed()
             }
             is WidgetNavRequest.Create -> {
+                // External "new event" entries (QS tile / launcher shortcut /
+                // widget) must land on top of whatever is open — the form overlay
+                // sits below Settings/calendars in the Box, so without this it
+                // would open hidden underneath them.
+                dismissCoveringOverlays()
                 val iso = req.dateIso ?: Clock.System.now()
                     .toLocalDateTime(TimeZone.currentSystemDefault()).date.toString()
                 heldCreateIso = iso
@@ -161,36 +266,83 @@ fun CalendarHost(
 
     val slideSpec = rememberCalendarSlideSpec()
 
+    // Base-level back: pop the view stack while no overlay covers it (each overlay
+    // owns its own BackHandler and takes precedence). Disabled at the home view,
+    // so back there falls through to the system and exits the app.
+    val anyOverlayVisible = showSearch || detailKey != null || createDateIso != null ||
+        editKey != null || showSettings || showCalendars || importUri != null ||
+        importForm != null
+    BackHandler(enabled = !anyOverlayVisible && viewStack.size > 1) {
+        viewStack = viewStack.dropLast(1)
+    }
+
     Box(modifier = modifier.fillMaxSize()) {
-        when (view) {
+        // Switching between the peer views (month/week/day/agenda) is lateral
+        // navigation, so it fades through rather than sliding — paging *within* a
+        // view keeps the directional slide. AnimatedContent keyed on the view type.
+        val viewSwitch = fadeThrough()
+        AnimatedContent(
+            targetState = view,
+            transitionSpec = { viewSwitch },
+            label = "view-switch",
+        ) { currentView ->
+            when (currentView) {
                 CalendarView.Week -> WeekScreen(
-                selectedView = view,
+                    selectedView = currentView,
                     onSelectView = onSelectView,
+                    onOpenDay = onOpenDay,
                     onEventClick = onEventClick,
                     onOpenSettings = onOpenSettings,
+                    onOpenSearch = onOpenSearch,
                     onCreateEvent = onCreateEvent,
+                    quickSwitchViews = quickSwitchViews,
+                    drawerViewOrder = drawerViewOrder,
                 )
                 CalendarView.Day -> DayScreen(
-                selectedView = view,
+                    selectedView = currentView,
                     onSelectView = onSelectView,
                     onEventClick = onEventClick,
                     onOpenSettings = onOpenSettings,
+                    onOpenSearch = onOpenSearch,
                     onCreateEvent = onCreateEvent,
                     initialDateIso = pendingDayIso,
+                    quickSwitchViews = quickSwitchViews,
+                    drawerViewOrder = drawerViewOrder,
                 )
                 CalendarView.Month -> MonthScreen(
-                selectedView = view,
+                    selectedView = currentView,
                     onSelectView = onSelectView,
                     onOpenDay = onOpenDay,
                     onOpenSettings = onOpenSettings,
+                    onOpenSearch = onOpenSearch,
                     onCreateEvent = onCreateEvent,
+                    quickSwitchViews = quickSwitchViews,
+                    drawerViewOrder = drawerViewOrder,
                 )
                 CalendarView.Agenda -> AgendaScreen(
-                selectedView = view,
+                    selectedView = currentView,
                     onSelectView = onSelectView,
+                    onOpenDay = onOpenDay,
                     onEventClick = onEventClick,
                     onOpenSettings = onOpenSettings,
+                    onOpenSearch = onOpenSearch,
                     onCreateEvent = onCreateEvent,
+                    quickSwitchViews = quickSwitchViews,
+                    drawerViewOrder = drawerViewOrder,
+                )
+            }
+        }
+
+        // Search overlay — below detail/edit in the Box so a tapped result's
+        // detail screen draws on top, and closing it returns to the results.
+        AnimatedVisibility(
+            visible = showSearch,
+            enter = slideInHorizontally(slideSpec) { it } + fadeIn(),
+            exit = slideOutHorizontally(slideSpec) { it } + fadeOut(),
+        ) {
+            SearchScreen(
+                onBack = { showSearch = false },
+                onEventClick = onEventClick,
             )
         }
 
@@ -268,7 +420,10 @@ fun CalendarHost(
             enter = slideInHorizontally(slideSpec) { it } + fadeIn(),
             exit = slideOutHorizontally(slideSpec) { it } + fadeOut(),
         ) {
-            CalendarsScreen(onBack = { showCalendars = false })
+            CalendarsScreen(
+                onBack = { showCalendars = false },
+                onImport = { importUri = it; importForceMany = true },
+            )
         }
 
         // Import flow for an opened/received .ics file. A single event routes
@@ -276,6 +431,7 @@ fun CalendarHost(
         importUri?.let { uri ->
             ImportScreen(
                 uri = uri,
+                forceMany = importForceMany,
                 onClose = { importUri = null },
                 onOpenSingle = { form ->
                     importUri = null
@@ -293,3 +449,9 @@ fun CalendarHost(
         }
     }
 }
+
+/** Persists the view back stack across config change / process death by ordinal. */
+private val viewStackSaver = listSaver<List<CalendarView>, Int>(
+    save = { stack -> stack.map(CalendarView::ordinal) },
+    restore = { ordinals -> ordinals.map { CalendarView.entries[it] } },
+)

app/src/main/java/de/jeanlucmakiola/calendula/ui/CalendarHostViewModel.kt

@@ -0,0 +1,48 @@
+package de.jeanlucmakiola.calendula.ui
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.ui.common.CalendarView
+import de.jeanlucmakiola.calendula.ui.common.IMPLEMENTED_VIEWS
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.stateIn
+import javax.inject.Inject
+
+/**
+ * Supplies [CalendarHost] with the user's default startup view (M1). Held as a
+ * nullable [StateFlow] so the host can wait for DataStore's first emission before
+ * seeding its view back stack — rendering nothing for that first frame rather
+ * than flashing the old hard-coded Week view and then correcting it.
+ */
+@HiltViewModel
+class CalendarHostViewModel @Inject constructor(
+    prefs: SettingsPrefs,
+) : ViewModel() {
+
+    val defaultView: StateFlow<CalendarView?> = prefs.defaultView.stateIn(
+        scope = viewModelScope,
+        started = SharingStarted.WhileSubscribed(5_000L),
+        initialValue = null,
+    )
+
+    /** Views the top-bar quick-switch pill cycles through, in the user's order (#24). */
+    val quickSwitchViews: StateFlow<List<CalendarView>> = prefs.quickSwitchConfig
+        .map { it.cycle }
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5_000L),
+            initialValue = IMPLEMENTED_VIEWS,
+        )
+
+    /** Order of the views in the navigation drawer (#24); every view always shown. */
+    val drawerViewOrder: StateFlow<List<CalendarView>> = prefs.drawerViewOrder
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5_000L),
+            initialValue = IMPLEMENTED_VIEWS,
+        )
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/RootScreen.kt

@@ -2,6 +2,9 @@ package de.jeanlucmakiola.calendula.ui
 
 import android.Manifest
 import android.content.pm.PackageManager
+import androidx.compose.animation.Crossfade
+import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.mutableStateOf
@@ -16,10 +19,13 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.core.content.ContextCompat
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.LifecycleEventObserver
+import de.jeanlucmakiola.calendula.data.contacts.SpecialDatesScheduler
+import de.jeanlucmakiola.calendula.data.contacts.hasContactsPermission
 import de.jeanlucmakiola.calendula.ui.permission.PermissionScreen
 import de.jeanlucmakiola.calendula.ui.permission.ReminderOnboardingScreen
 import de.jeanlucmakiola.calendula.ui.permission.ReminderOnboardingViewModel
 
+@OptIn(ExperimentalMaterial3ExpressiveApi::class)
 @Composable
 fun RootScreen(
     modifier: Modifier = Modifier,
@@ -29,6 +35,8 @@ fun RootScreen(
     onWidgetNavConsumed: () -> Unit = {},
     requestedImportUri: android.net.Uri? = null,
     onImportConsumed: () -> Unit = {},
+    requestedInsertForm: de.jeanlucmakiola.calendula.domain.EventForm? = null,
+    onInsertConsumed: () -> Unit = {},
 ) {
     val context = LocalContext.current
     var hasPermission by remember {
@@ -45,19 +53,31 @@ fun RootScreen(
                 hasPermission = ContextCompat.checkSelfPermission(
                     context, Manifest.permission.READ_CALENDAR
                 ) == PackageManager.PERMISSION_GRANTED
+                // Refresh the contact special-dates mirror on foreground (the
+                // worker is debounced and no-ops when the feature is off). Gated
+                // on the permission so users without the opt-in never enqueue it.
+                if (context.hasContactsPermission()) {
+                    SpecialDatesScheduler.runNow(context, foreground = true)
+                }
             }
         }
         lifecycle.addObserver(obs)
         onDispose { lifecycle.removeObserver(obs) }
     }
 
-    if (hasPermission) {
+    // Cross-fade the one-time onboarding gates so granting permission / finishing
+    // onboarding eases into the next screen instead of snapping. A fade carries no
+    // spatial motion, so it stays appropriate under "remove animations" too.
+    val gateSpec = MaterialTheme.motionScheme.fastEffectsSpec<Float>()
+    Crossfade(targetState = hasPermission, animationSpec = gateSpec, label = "permissionGate") { granted ->
+        if (granted) {
             // Second onboarding gate (v1.4, one-time): reminder notifications.
             // Null until DataStore's first emission — render nothing for that
             // frame instead of flashing the wrong screen.
             val reminderOnboarding: ReminderOnboardingViewModel = hiltViewModel()
             val onboardingDone by reminderOnboarding.onboardingDone.collectAsStateWithLifecycle()
-        when (onboardingDone) {
+            Crossfade(targetState = onboardingDone, animationSpec = gateSpec, label = "onboardingGate") { done ->
+                when (done) {
                     true -> CalendarHost(
                         modifier = modifier,
                         requestedDetailKey = requestedDetailKey,
@@ -66,6 +86,8 @@ fun RootScreen(
                         onWidgetNavConsumed = onWidgetNavConsumed,
                         requestedImportUri = requestedImportUri,
                         onImportConsumed = onImportConsumed,
+                        requestedInsertForm = requestedInsertForm,
+                        onInsertConsumed = onInsertConsumed,
                     )
                     false -> ReminderOnboardingScreen(
                         onFinished = reminderOnboarding::finish,
@@ -73,6 +95,7 @@ fun RootScreen(
                     )
                     null -> {}
                 }
+            }
         } else {
             PermissionScreen(
                 onGranted = { hasPermission = true },
@@ -80,3 +103,4 @@ fun RootScreen(
             )
         }
     }
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/WidgetNavRequest.kt

@@ -1,15 +1,43 @@
 package de.jeanlucmakiola.calendula.ui
 
+import de.jeanlucmakiola.calendula.ui.common.CalendarView
+
 /**
  * A navigation a home-screen widget asked the app to perform when launched.
  * Parsed from the launch intent in MainActivity and consumed once by
- * [CalendarHost] (event taps reuse the existing reminder detail-key channel, so
- * they are not modelled here).
+ * [CalendarHost]. Every request carries the [source] view of the widget it came
+ * from (the agenda widget → [CalendarView.Agenda], the month widget →
+ * [CalendarView.Month]) so the in-app back stack roots itself in that view:
+ * backing out of the opened date/event returns to the widget's own view, not the
+ * default home. (Reminder notifications are not widgets — they keep the separate
+ * detail-key channel and leave the base view untouched.)
  */
 sealed interface WidgetNavRequest {
-    /** Open the day view anchored on [dateIso] (an ISO `yyyy-MM-dd` date). */
-    data class OpenDate(val dateIso: String) : WidgetNavRequest
+    /**
+     * Open the day view anchored on [dateIso] (an ISO `yyyy-MM-dd` date), over
+     * [source]. A null [source] means the request came from outside the app (a
+     * launcher/clock date tap, issue #9) rather than a widget, so it roots over
+     * the default home view instead of a widget's view.
+     */
+    data class OpenDate(val dateIso: String, val source: CalendarView?) : WidgetNavRequest
+
+    /** Open one occurrence's detail (an agenda-widget event tap), over [source]. */
+    data class OpenEvent(
+        val eventId: Long,
+        val beginMillis: Long,
+        val endMillis: Long,
+        val source: CalendarView,
+    ) : WidgetNavRequest
 
     /** Open the create-event form prefilled for [dateIso] (today when null). */
     data class Create(val dateIso: String?) : WidgetNavRequest
+
+    /**
+     * Open the app rooted on a top-level [view] with no date drill-in — a widget
+     * header tap. A null [view] means "the user's default home view" (the agenda
+     * widget's "Upcoming" title, issue #20); a concrete view roots there over the
+     * default home (the month widget's month/year title → [CalendarView.Month],
+     * issue #18), so backing out returns to the default view, then exits.
+     */
+    data class OpenView(val view: CalendarView?) : WidgetNavRequest
 }

app/src/main/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaRange.kt

@@ -0,0 +1,111 @@
+package de.jeanlucmakiola.calendula.ui.agenda
+
+import kotlinx.datetime.DayOfWeek
+import kotlinx.datetime.LocalDate
+import java.time.YearMonth
+import java.time.format.DateTimeFormatter
+import java.time.format.FormatStyle
+import java.util.Locale
+
+/**
+ * How far ahead the agenda (screen or widget) shows events, starting at today.
+ *
+ * Two flavours:
+ * - **Rolling** windows of a fixed length: [Day] (today), [Week] (7 days),
+ *   [Month] (30 days), [Custom] (1–365 days). These never degenerate.
+ * - **Calendar-aligned** windows that end at a period boundary: [ThisWeek] runs
+ *   through the end of the current week (respecting the week-start preference —
+ *   a Monday start means "everything before next Monday"); [ThisMonth] runs
+ *   through the last day of the current month. These shrink as the period ends.
+ */
+sealed interface AgendaRange {
+    data object Day : AgendaRange
+    data object Week : AgendaRange
+    data object Month : AgendaRange
+    data object ThisWeek : AgendaRange
+    data object ThisMonth : AgendaRange
+    data class Custom(val days: Int) : AgendaRange
+
+    companion object {
+        /** Allowed bounds for a [Custom] day count. */
+        const val MIN_CUSTOM_DAYS = 1
+        const val MAX_CUSTOM_DAYS = 365
+    }
+}
+
+private const val DAYS_PER_WEEK = 7
+
+/**
+ * Inclusive number of days the window spans, starting at (and including)
+ * [anchor]. The calendar-aligned ranges depend on the anchor day and, for
+ * [AgendaRange.ThisWeek], the [weekStart] preference.
+ */
+fun AgendaRange.dayCount(anchor: LocalDate, weekStart: DayOfWeek): Int = when (this) {
+    AgendaRange.Day -> 1
+    AgendaRange.Week -> DAYS_PER_WEEK
+    AgendaRange.Month -> 30
+    AgendaRange.ThisWeek -> {
+        // Days elapsed since the week's first day (0 when today *is* the start),
+        // so the window is the rest of the week through the day before it repeats.
+        val sinceWeekStart = ((anchor.dayOfWeek.ordinal - weekStart.ordinal) + DAYS_PER_WEEK) % DAYS_PER_WEEK
+        DAYS_PER_WEEK - sinceWeekStart
+    }
+    AgendaRange.ThisMonth -> {
+        val daysInMonth = YearMonth.of(anchor.year, anchor.month.ordinal + 1).lengthOfMonth()
+        daysInMonth - anchor.day + 1
+    }
+    is AgendaRange.Custom -> days.coerceIn(AgendaRange.MIN_CUSTOM_DAYS, AgendaRange.MAX_CUSTOM_DAYS)
+}
+
+/** Stored representation: a fixed token, or `CUSTOM:<days>`. */
+fun AgendaRange.storageValue(): String = when (this) {
+    AgendaRange.Day -> "DAY"
+    AgendaRange.Week -> "WEEK"
+    AgendaRange.Month -> "MONTH"
+    AgendaRange.ThisWeek -> "THIS_WEEK"
+    AgendaRange.ThisMonth -> "THIS_MONTH"
+    is AgendaRange.Custom -> "$CUSTOM_PREFIX$days"
+}
+
+/** Parse a stored value; unknown/garbage falls back to [default]. */
+fun parseAgendaRange(stored: String?, default: AgendaRange): AgendaRange = when {
+    stored == "DAY" -> AgendaRange.Day
+    stored == "WEEK" -> AgendaRange.Week
+    stored == "MONTH" -> AgendaRange.Month
+    stored == "THIS_WEEK" -> AgendaRange.ThisWeek
+    stored == "THIS_MONTH" -> AgendaRange.ThisMonth
+    stored != null && stored.startsWith(CUSTOM_PREFIX) -> {
+        val days = stored.removePrefix(CUSTOM_PREFIX).toIntOrNull()
+        if (days != null) {
+            AgendaRange.Custom(days.coerceIn(AgendaRange.MIN_CUSTOM_DAYS, AgendaRange.MAX_CUSTOM_DAYS))
+        } else {
+            default
+        }
+    }
+    else -> default
+}
+
+/**
+ * The concrete span the range covers, starting at [start] through [end]
+ * (inclusive), for a human-readable header:
+ * - [AgendaRange.Day] → a single medium date ("27 Jun 2026")
+ * - [AgendaRange.ThisMonth] → month and year ("June 2026")
+ * - everything else → "start – end" ("27 Jun – 3 Jul 2026")
+ */
+fun agendaRangeWindowSummary(
+    range: AgendaRange,
+    start: LocalDate,
+    end: LocalDate,
+    locale: Locale,
+): String {
+    val javaStart = java.time.LocalDate.of(start.year, start.month.ordinal + 1, start.day)
+    val javaEnd = java.time.LocalDate.of(end.year, end.month.ordinal + 1, end.day)
+    val medium = DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).withLocale(locale)
+    return when (range) {
+        AgendaRange.Day -> medium.format(javaStart)
+        AgendaRange.ThisMonth -> DateTimeFormatter.ofPattern("LLLL yyyy", locale).format(javaStart)
+        else -> "${DateTimeFormatter.ofPattern("d MMM", locale).format(javaStart)} – ${medium.format(javaEnd)}"
+    }
+}
+
+private const val CUSTOM_PREFIX = "CUSTOM:"

app/src/main/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaScreen.kt

@@ -2,23 +2,28 @@ package de.jeanlucmakiola.calendula.ui.agenda
 
 import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.EventAvailable
+import androidx.compose.material.icons.filled.Coffee
+import androidx.compose.material.icons.filled.DateRange
 import androidx.compose.material.icons.filled.Menu
+import androidx.compose.material.icons.filled.Search
 import androidx.compose.material3.DrawerValue
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
@@ -34,9 +39,13 @@ import androidx.compose.material3.TopAppBarScrollBehavior
 import androidx.compose.material3.rememberDrawerState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.input.nestedscroll.nestedScroll
 import androidx.compose.ui.res.stringResource
@@ -45,17 +54,28 @@ import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.data.prefs.PastEventDisplay
 import de.jeanlucmakiola.calendula.domain.EventInstance
+import de.jeanlucmakiola.calendula.domain.hasEnded
+import de.jeanlucmakiola.calendula.ui.common.AgendaRangePicker
+import de.jeanlucmakiola.calendula.ui.common.agendaRangeLabel
+import de.jeanlucmakiola.floret.identity.animateItemMotion
 import de.jeanlucmakiola.calendula.ui.common.CalendarDrawer
 import de.jeanlucmakiola.calendula.ui.common.CalendarFabColumn
 import de.jeanlucmakiola.calendula.ui.common.CalendarFailure
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
-import de.jeanlucmakiola.calendula.ui.common.GroupedRow
-import de.jeanlucmakiola.calendula.ui.common.Position
+import de.jeanlucmakiola.calendula.ui.common.IMPLEMENTED_VIEWS
+import de.jeanlucmakiola.calendula.ui.common.EventDimAlpha
+import de.jeanlucmakiola.floret.components.GroupedRow
+import de.jeanlucmakiola.floret.components.Position
 import de.jeanlucmakiola.calendula.ui.common.ViewSwitcherPill
 import de.jeanlucmakiola.calendula.ui.common.next
-import de.jeanlucmakiola.calendula.ui.common.pastelize
-import de.jeanlucmakiola.calendula.ui.common.positionOf
+import de.jeanlucmakiola.floret.components.pastelize
+import de.jeanlucmakiola.floret.components.positionOf
+import de.jeanlucmakiola.calendula.ui.common.rememberCurrentMinute
+import de.jeanlucmakiola.calendula.ui.common.currentLocale
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
+import de.jeanlucmakiola.calendula.ui.common.formatTimeOfDay
 import kotlinx.coroutines.launch
 import kotlinx.datetime.DateTimeUnit
 import kotlinx.datetime.LocalDate
@@ -73,23 +93,30 @@ private val zone = TimeZone.currentSystemDefault()
 fun AgendaScreen(
     selectedView: CalendarView,
     onSelectView: (CalendarView) -> Unit,
+    onOpenDay: (LocalDate) -> Unit,
     onEventClick: (EventInstance) -> Unit,
     onOpenSettings: () -> Unit,
+    onOpenSearch: () -> Unit,
     onCreateEvent: (LocalDate, Int?) -> Unit,
+    quickSwitchViews: List<CalendarView> = IMPLEMENTED_VIEWS,
+    drawerViewOrder: List<CalendarView> = IMPLEMENTED_VIEWS,
     modifier: Modifier = Modifier,
     viewModel: AgendaViewModel = hiltViewModel(),
 ) {
     val state by viewModel.state.collectAsStateWithLifecycle()
     val anchor by viewModel.anchor.collectAsStateWithLifecycle()
+    val pastDisplay by viewModel.pastEventDisplay.collectAsStateWithLifecycle()
 
     val scrollBehavior = TopAppBarDefaults.pinnedScrollBehavior()
     val drawerState = rememberDrawerState(DrawerValue.Closed)
     val scope = rememberCoroutineScope()
+    var showRangePicker by remember { mutableStateOf(false) }
 
     val isOnToday = when (val s = state) {
         is AgendaUiState.Success -> s.anchor == s.today
         else -> true
     }
+    val successState = state as? AgendaUiState.Success
 
     ModalNavigationDrawer(
         drawerState = drawerState,
@@ -97,6 +124,7 @@ fun AgendaScreen(
             CalendarDrawer(
                 currentView = selectedView,
                 currentDate = anchor,
+                viewOrder = drawerViewOrder,
                 onSelectView = { view ->
                     onSelectView(view)
                     scope.launch { drawerState.close() }
@@ -117,8 +145,9 @@ fun AgendaScreen(
             topBar = {
                 AgendaTopBar(
                     selectedView = selectedView,
-                    onCycleView = { onSelectView(selectedView.next()) },
+                    onCycleView = { onSelectView(selectedView.next(quickSwitchViews)) },
                     onOpenDrawer = { scope.launch { drawerState.open() } },
+                    onOpenSearch = onOpenSearch,
                     scrollBehavior = scrollBehavior,
                 )
             },
@@ -131,23 +160,138 @@ fun AgendaScreen(
                 )
             },
         ) { innerPadding ->
-            AgendaContent(
-                state = state,
-                onRetry = viewModel::goToToday,
-                onEventClick = onEventClick,
+            Column(
                 modifier = Modifier
-                    .padding(innerPadding)
-                    .fillMaxSize(),
+                    .fillMaxSize()
+                    .padding(innerPadding),
+            ) {
+                // One bar at the top: the "showing …" header on the left and the
+                // session range switcher on the right (one settings toggle).
+                successState?.takeIf { it.showRangeBar }?.let { s ->
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(start = 28.dp, end = 16.dp, top = 8.dp, bottom = 8.dp),
+                    ) {
+                        AgendaRangeBanner(
+                            range = s.range,
+                            start = s.anchor,
+                            end = s.rangeEnd,
+                            modifier = Modifier.weight(1f),
+                        )
+                        AgendaRangePill(
+                            range = s.range,
+                            isOverride = s.rangeIsOverride,
+                            onClick = { showRangePicker = true },
                         )
                     }
                 }
+                AgendaContent(
+                    state = state,
+                    pastDisplay = pastDisplay,
+                    onRetry = viewModel::goToToday,
+                    onEventClick = onEventClick,
+                    onOpenDay = onOpenDay,
+                    modifier = Modifier
+                        .weight(1f)
+                        .fillMaxWidth(),
+                )
+            }
+        }
+    }
+
+    if (showRangePicker) {
+        AgendaRangePicker(
+            title = stringResource(R.string.settings_agenda_range),
+            description = stringResource(R.string.agenda_range_override_hint),
+            selected = successState?.range ?: AgendaRange.Month,
+            onSelect = viewModel::setRangeOverride,
+            onDismiss = { showRangePicker = false },
+        )
+    }
+}
+
+/**
+ * A compact tonal pill showing the agenda's current range. Tapping it opens the
+ * range picker as a session-only override. Filled with the primary container
+ * while an override is active, so the temporary state is obvious.
+ */
+@Composable
+private fun AgendaRangePill(
+    range: AgendaRange,
+    isOverride: Boolean,
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    val container = if (isOverride) {
+        MaterialTheme.colorScheme.primaryContainer
+    } else {
+        MaterialTheme.colorScheme.surfaceContainerHigh
+    }
+    val content = if (isOverride) {
+        MaterialTheme.colorScheme.onPrimaryContainer
+    } else {
+        MaterialTheme.colorScheme.onSurfaceVariant
+    }
+    Surface(
+        color = container,
+        contentColor = content,
+        shape = RoundedCornerShape(50),
+        modifier = modifier.clickable(onClick = onClick),
+    ) {
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier.padding(horizontal = 16.dp, vertical = 10.dp),
+        ) {
+            Icon(
+                imageVector = Icons.Filled.DateRange,
+                contentDescription = null,
+                modifier = Modifier.size(18.dp),
+            )
+            Spacer(Modifier.width(8.dp))
+            Text(
+                text = agendaRangeLabel(range),
+                style = MaterialTheme.typography.labelLarge,
+            )
+        }
+    }
+}
+
+/**
+ * A header naming the concrete window currently shown, e.g. "Showing all events
+ * for · Today, 27 Jun 2026" / "This week, 27 Jun – 3 Jul" / "This month, June 2026".
+ */
+@Composable
+private fun AgendaRangeBanner(
+    range: AgendaRange,
+    start: LocalDate,
+    end: LocalDate,
+    modifier: Modifier = Modifier,
+) {
+    val locale = currentLocale()
+    val window = agendaRangeWindowSummary(range, start, end, locale)
+    Column(modifier = modifier) {
+        Text(
+            text = stringResource(R.string.agenda_range_showing_label),
+            style = MaterialTheme.typography.labelMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Text(
+            text = "${agendaRangeLabel(range)}, $window",
+            style = MaterialTheme.typography.titleMedium,
+            color = MaterialTheme.colorScheme.onSurface,
+        )
+    }
 }
 
 @Composable
 private fun AgendaContent(
     state: AgendaUiState,
+    pastDisplay: PastEventDisplay,
     onRetry: () -> Unit,
     onEventClick: (EventInstance) -> Unit,
+    onOpenDay: (LocalDate) -> Unit,
     modifier: Modifier = Modifier,
 ) {
     when (state) {
@@ -155,11 +299,32 @@ private fun AgendaContent(
         is AgendaUiState.Failure -> Box(modifier) {
             CalendarFailure(reason = state.reason, onRetry = onRetry)
         }
-        is AgendaUiState.Success ->
-            if (state.days.isEmpty()) {
+        is AgendaUiState.Success -> {
+            val now by rememberCurrentMinute()
+            // Hiding drops finished events — and any day they leave empty; dimming
+            // keeps them but fades the row. Recomputed each minute so events fall
+            // away (or fade) as they end while the screen stays open.
+            val days = if (pastDisplay == PastEventDisplay.HIDE) {
+                state.days.mapNotNull { day ->
+                    val remaining = day.events.filterNot { it.hasEnded(now) }
+                    if (remaining.isEmpty()) null else day.copy(events = remaining)
+                }
+            } else {
+                state.days
+            }
+            if (days.isEmpty()) {
                 AgendaEmpty(modifier)
             } else {
-                AgendaList(state = state, onEventClick = onEventClick, modifier = modifier)
+                AgendaList(
+                    days = days,
+                    today = state.today,
+                    dimPast = pastDisplay == PastEventDisplay.DIM,
+                    now = now,
+                    onEventClick = onEventClick,
+                    onOpenDay = onOpenDay,
+                    modifier = modifier,
+                )
+            }
         }
     }
 }
@@ -167,8 +332,12 @@ private fun AgendaContent(
 @OptIn(ExperimentalFoundationApi::class)
 @Composable
 private fun AgendaList(
-    state: AgendaUiState.Success,
+    days: List<AgendaDay>,
+    today: LocalDate,
+    dimPast: Boolean,
+    now: Instant,
     onEventClick: (EventInstance) -> Unit,
+    onOpenDay: (LocalDate) -> Unit,
     modifier: Modifier = Modifier,
 ) {
     LazyColumn(
@@ -176,9 +345,9 @@ private fun AgendaList(
         // Bottom inset clears the FAB stack so the last row stays tappable.
         contentPadding = PaddingValues(top = 8.dp, bottom = 96.dp),
     ) {
-        state.days.forEach { day ->
+        days.forEach { day ->
             stickyHeader(key = "header-${day.date}") {
-                AgendaDayHeader(date = day.date, today = state.today)
+                AgendaDayHeader(date = day.date, today = today, onOpenDay = onOpenDay)
             }
             itemsIndexed(
                 items = day.events,
@@ -187,6 +356,8 @@ private fun AgendaList(
                 AgendaEventRow(
                     event = event,
                     position = positionOf(index, day.events.size),
+                    dimmed = dimPast && event.hasEnded(now),
+                    modifier = animateItemMotion(),
                     onClick = { onEventClick(event) },
                 )
             }
@@ -196,10 +367,16 @@ private fun AgendaList(
 }
 
 @Composable
-private fun AgendaDayHeader(date: LocalDate, today: LocalDate) {
+private fun AgendaDayHeader(
+    date: LocalDate,
+    today: LocalDate,
+    onOpenDay: (LocalDate) -> Unit,
+) {
     Surface(
         color = MaterialTheme.colorScheme.surface,
-        modifier = Modifier.fillMaxWidth(),
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { onOpenDay(date) },
     ) {
         Text(
             text = agendaDayLabel(date, today),
@@ -218,11 +395,14 @@ private fun AgendaDayHeader(date: LocalDate, today: LocalDate) {
 private fun AgendaEventRow(
     event: EventInstance,
     position: Position,
+    dimmed: Boolean,
+    modifier: Modifier = Modifier,
     onClick: () -> Unit,
 ) {
     val dark = isSystemInDarkTheme()
     val title = event.title.ifBlank { stringResource(R.string.event_untitled) }
     GroupedRow(
+        modifier = if (dimmed) modifier.alpha(EventDimAlpha) else modifier,
         title = title,
         summary = agendaTimeSummary(event),
         position = position,
@@ -247,7 +427,7 @@ private fun AgendaEmpty(modifier: Modifier = Modifier) {
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
         Icon(
-            imageVector = Icons.Filled.EventAvailable,
+            imageVector = Icons.Filled.Coffee,
             contentDescription = null,
             tint = MaterialTheme.colorScheme.onSurfaceVariant,
             modifier = Modifier.size(48.dp),
@@ -258,13 +438,6 @@ private fun AgendaEmpty(modifier: Modifier = Modifier) {
             style = MaterialTheme.typography.titleMedium,
             textAlign = TextAlign.Center,
         )
-        Spacer(Modifier.height(4.dp))
-        Text(
-            text = stringResource(R.string.agenda_empty_subtitle),
-            style = MaterialTheme.typography.bodyMedium,
-            color = MaterialTheme.colorScheme.onSurfaceVariant,
-            textAlign = TextAlign.Center,
-        )
     }
 }
 
@@ -274,6 +447,7 @@ private fun AgendaTopBar(
     selectedView: CalendarView,
     onCycleView: () -> Unit,
     onOpenDrawer: () -> Unit,
+    onOpenSearch: () -> Unit,
     scrollBehavior: TopAppBarScrollBehavior,
 ) {
     TopAppBar(
@@ -292,6 +466,12 @@ private fun AgendaTopBar(
             }
         },
         actions = {
+            IconButton(onClick = onOpenSearch) {
+                Icon(
+                    imageVector = Icons.Default.Search,
+                    contentDescription = stringResource(R.string.search_action),
+                )
+            }
             ViewSwitcherPill(
                 current = selectedView,
                 onCycle = onCycleView,
@@ -324,15 +504,17 @@ private fun agendaTimeSummary(event: EventInstance): String {
     val time = if (event.isAllDay) {
         stringResource(R.string.event_detail_all_day)
     } else {
-        "${formatTime(event.start)} – ${formatTime(event.end)}"
+        val is24Hour = LocalUse24HourFormat.current
+        val locale = currentLocale()
+        "${formatTime(event.start, is24Hour, locale)} – ${formatTime(event.end, is24Hour, locale)}"
     }
     val location = event.location?.takeIf { it.isNotBlank() }
     return if (location != null) "$time · $location" else time
 }
 
-private fun formatTime(instant: Instant): String {
+private fun formatTime(instant: Instant, is24Hour: Boolean, locale: Locale): String {
     val t = instant.toLocalDateTime(zone).time
-    return "%02d:%02d".format(t.hour, t.minute)
+    return formatTimeOfDay(t.hour, t.minute, is24Hour, locale)
 }
 
 private fun formatAgendaDate(date: LocalDate): String {

app/src/main/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaUiState.kt

@@ -53,5 +53,13 @@ sealed interface AgendaUiState {
         val anchor: LocalDate,
         val today: LocalDate,
         val days: List<AgendaDay>,
+        /** The range currently in effect — the saved default or a session override. */
+        val range: AgendaRange,
+        /** True when [range] is a temporary in-view override of the saved default. */
+        val rangeIsOverride: Boolean,
+        /** Last day the current [range] covers (inclusive), for the range header. */
+        val rangeEnd: LocalDate,
+        /** Whether to show the top range bar — header + switcher (toggle, on by default). */
+        val showRangeBar: Boolean,
     ) : AgendaUiState
 }

app/src/main/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaViewModel.kt

@@ -5,6 +5,9 @@ import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
 import de.jeanlucmakiola.calendula.data.di.IoDispatcher
+import de.jeanlucmakiola.calendula.data.prefs.PastEventDisplay
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.data.prefs.resolveFirstDay
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.FailureReason
@@ -17,10 +20,13 @@ import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.flatMapLatest
 import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.datetime.DateTimeUnit
+import kotlinx.datetime.DayOfWeek
 import kotlinx.datetime.LocalDate
 import kotlinx.datetime.TimeZone
+import java.util.Locale
 import kotlinx.datetime.atStartOfDayIn
 import kotlinx.datetime.atTime
 import kotlinx.datetime.plus
@@ -30,16 +36,36 @@ import kotlin.time.Clock
 import kotlin.time.Instant
 import javax.inject.Inject
 
-/** How far ahead the agenda loads events from its anchor day. */
-internal const val AGENDA_WINDOW_DAYS = 60
-
 @OptIn(ExperimentalCoroutinesApi::class)
 @HiltViewModel
 class AgendaViewModel @Inject constructor(
     private val repository: CalendarRepository,
+    settingsPrefs: SettingsPrefs,
     @IoDispatcher private val io: CoroutineDispatcher,
 ) : ViewModel() {
 
+    // The saved agenda range plus the range-bar visibility toggle.
+    private val agendaSettings = combine(
+        settingsPrefs.agendaScreenRange,
+        settingsPrefs.agendaShowRangeBar,
+    ) { range, showBar -> AgendaSettings(range, showBar) }
+
+    // First day of the week, for the calendar-aligned "this week" range.
+    private val weekStartDay = settingsPrefs.weekStart
+        .map { it.resolveFirstDay(Locale.getDefault()) }
+
+    /**
+     * How to treat events that already ended today (show / dim / hide). A display
+     * concern only, so it rides alongside the data state rather than re-querying;
+     * the screen combines it with a per-minute "now" to fade or drop past rows.
+     */
+    val pastEventDisplay: StateFlow<PastEventDisplay> = settingsPrefs.pastEventDisplay
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5_000L),
+            initialValue = PastEventDisplay.SHOW,
+        )
+
     private val zone = TimeZone.currentSystemDefault()
 
     private val todayDate: LocalDate
@@ -48,14 +74,32 @@ class AgendaViewModel @Inject constructor(
     private val _anchor = MutableStateFlow(todayDate)
     val anchor: StateFlow<LocalDate> = _anchor
 
-    val state: StateFlow<AgendaUiState> = _anchor
-        .flatMapLatest { anchor ->
-            val range = agendaRange(anchor, AGENDA_WINDOW_DAYS, zone)
+    // A transient, in-view override of the saved agenda range. Held in memory
+    // (not persisted), so it survives view switches and rotation within the
+    // session but resets to the saved default when the app is relaunched.
+    private val _rangeOverride = MutableStateFlow<AgendaRange?>(null)
+
+    val state: StateFlow<AgendaUiState> =
+        combine(_anchor, agendaSettings, _rangeOverride, weekStartDay) { anchor, settings, override, weekStart ->
+            AgendaParams(
+                anchor = anchor,
+                range = override ?: settings.range,
+                rangeIsOverride = override != null && override != settings.range,
+                weekStart = weekStart,
+                showRangeBar = settings.showBar,
+            )
+        }
+        .flatMapLatest { params ->
+            val window = agendaRange(
+                params.anchor,
+                params.range.dayCount(params.anchor, params.weekStart) - 1,
+                zone,
+            )
             combine(
                 repository.calendars(),
-                repository.instances(range),
+                repository.instances(window),
             ) { calendars, instances ->
-                buildState(anchor, calendars, instances)
+                buildState(params, calendars, instances)
             }
         }
         .catch { emit(AgendaUiState.Failure(FailureReason.ProviderUnavailable)) }
@@ -75,16 +119,47 @@ class AgendaViewModel @Inject constructor(
         _anchor.value = date
     }
 
+    /** Temporarily override the agenda range for this session (the bottom-left pill). */
+    fun setRangeOverride(range: AgendaRange) {
+        _rangeOverride.value = range
+    }
+
+    private data class AgendaSettings(
+        val range: AgendaRange,
+        val showBar: Boolean,
+    )
+
+    private data class AgendaParams(
+        val anchor: LocalDate,
+        val range: AgendaRange,
+        val rangeIsOverride: Boolean,
+        val weekStart: DayOfWeek,
+        val showRangeBar: Boolean,
+    )
+
     private fun buildState(
-        anchor: LocalDate,
+        params: AgendaParams,
         calendars: List<CalendarSource>,
         instances: List<EventInstance>,
     ): AgendaUiState {
         if (calendars.isEmpty()) {
             return AgendaUiState.Failure(FailureReason.NoCalendarsConfigured)
         }
+        val anchor = params.anchor
         val days = groupAgendaDays(anchor, instances, zone)
-        return AgendaUiState.Success(anchor = anchor, today = todayDate, days = days)
+        val rangeEnd = anchor.plus(
+            params.range.dayCount(anchor, params.weekStart) - 1,
+            DateTimeUnit.DAY,
+        )
+        return AgendaUiState.Success(
+            anchor = anchor,
+            today = todayDate,
+            days = days,
+            range = params.range,
+            rangeIsOverride = params.rangeIsOverride,
+            rangeEnd = rangeEnd,
+            showRangeBar = params.showRangeBar,
+        )
     }
 }
 

app/src/main/java/de/jeanlucmakiola/calendula/ui/calendars/CalendarsScreen.kt

@@ -4,14 +4,16 @@ import android.accounts.AccountManager
 import android.content.Context
 import android.content.Intent
 import android.provider.Settings
-import androidx.activity.compose.BackHandler
+import android.text.format.DateUtils
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.foundation.background
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ColumnScope
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -21,31 +23,40 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.rememberScrollState
-import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.automirrored.filled.Notes
+import androidx.compose.material.icons.automirrored.filled.OpenInNew
 import androidx.compose.material.icons.filled.Add
 import androidx.compose.material.icons.filled.CalendarMonth
 import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.Cloud
 import androidx.compose.material.icons.filled.Delete
-import androidx.compose.material.icons.filled.Edit
 import androidx.compose.material.icons.filled.FileDownload
-import androidx.compose.material.icons.filled.OpenInNew
+import androidx.compose.material.icons.filled.FileUpload
+import androidx.compose.material.icons.filled.MoreVert
 import androidx.compose.material.icons.filled.Palette
+import androidx.compose.material.icons.filled.PhoneAndroid
+import androidx.compose.material.icons.filled.Schedule
+import androidx.compose.material.icons.filled.Visibility
+import androidx.compose.material.icons.filled.VisibilityOff
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
+import androidx.compose.material3.Checkbox
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.SnackbarHost
 import androidx.compose.material3.SnackbarHostState
 import androidx.compose.material3.Surface
+import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.material3.TopAppBar
@@ -55,36 +66,64 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.listSaver
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.pluralStringResource
+import androidx.compose.ui.res.stringArrayResource
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.semantics.contentDescription
+import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.unit.dp
+import androidx.core.net.toUri
+import androidx.documentfile.provider.DocumentFile
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.data.prefs.BackupStatus
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
 import de.jeanlucmakiola.calendula.domain.CalendarSource
-import de.jeanlucmakiola.calendula.ui.common.CALENDAR_COLOR_PALETTE
+import de.jeanlucmakiola.calendula.data.calendar.CalendarColorPalette
 import de.jeanlucmakiola.calendula.ui.common.CalendarColorChip
-import de.jeanlucmakiola.calendula.ui.common.CollapsingScaffold
+import de.jeanlucmakiola.calendula.ui.common.LeadingAvatar
+import de.jeanlucmakiola.calendula.ui.common.SourceLogo
+import de.jeanlucmakiola.calendula.ui.common.curatedSourcePackage
+import de.jeanlucmakiola.floret.components.CollapsingScaffold
+import de.jeanlucmakiola.floret.components.DialogAmountField
+import de.jeanlucmakiola.floret.components.DialogUnitDropdown
+import de.jeanlucmakiola.floret.components.FullScreenPicker
+import de.jeanlucmakiola.floret.components.positionOf
+import de.jeanlucmakiola.floret.identity.collapseExit
+import de.jeanlucmakiola.floret.identity.expandEnter
+import de.jeanlucmakiola.floret.identity.predictiveBack
 import de.jeanlucmakiola.calendula.ui.common.ColorSwatchRow
-import de.jeanlucmakiola.calendula.ui.common.GroupedRow
-import de.jeanlucmakiola.calendula.ui.common.InlineTextField
-import de.jeanlucmakiola.calendula.ui.common.Position
-import de.jeanlucmakiola.calendula.ui.common.pastelize
-import de.jeanlucmakiola.calendula.ui.common.positionOf
+import de.jeanlucmakiola.floret.components.GroupedRow
+import de.jeanlucmakiola.floret.components.InlineTextField
+import de.jeanlucmakiola.floret.components.Position
+import de.jeanlucmakiola.floret.components.pastelize
 import java.time.LocalDate
 
 /** Sentinel [editorId] meaning "the editor is composing a new calendar". */
 private const val NEW_CALENDAR_ID = Long.MIN_VALUE
 
+// SAF mime filter for the restore picker. `.ics` files reach us under several
+// mimes depending on the source app (our own export uses text/calendar; others
+// hand them out as octet-stream or text/plain), so accept the common set rather
+// than hide valid backups behind an over-tight filter.
+private val RESTORE_MIME_TYPES = arrayOf(
+    "text/calendar",
+    "application/octet-stream",
+    "text/plain",
+)
+
 /**
  * Calendar manager (reached from Settings). Lists the app's own device-only
  * calendars with create / rename / recolor / delete (via a full-screen editor),
@@ -95,11 +134,14 @@ private const val NEW_CALENDAR_ID = Long.MIN_VALUE
 @Composable
 fun CalendarsScreen(
     onBack: () -> Unit,
+    onImport: (android.net.Uri) -> Unit,
     viewModel: CalendarsViewModel = hiltViewModel(),
 ) {
     val calendars by viewModel.calendars.collectAsStateWithLifecycle()
+    val disabledIds by viewModel.disabledCalendarIds.collectAsStateWithLifecycle()
     val error by viewModel.error.collectAsStateWithLifecycle()
     val backupResult by viewModel.backupResult.collectAsStateWithLifecycle()
+    val autoBackup by viewModel.autoBackup.collectAsStateWithLifecycle()
 
     // null = list; NEW_CALENDAR_ID = create; any other id = edit that calendar.
     // [editorSession] bumps on every open so the editor's field state resets for
@@ -113,7 +155,7 @@ fun CalendarsScreen(
             sessionKey = editorSession,
             isNew = editorId == NEW_CALENDAR_ID,
             initialName = editing?.displayName.orEmpty(),
-            initialColor = editing?.color ?: CALENDAR_COLOR_PALETTE.first(),
+            initialColor = editing?.color ?: CalendarColorPalette.all.first(),
             initialDescription = editing?.description.orEmpty(),
             onSave = { name, color, description ->
                 val id = editorId
@@ -134,14 +176,22 @@ fun CalendarsScreen(
         CalendarsList(
             local = calendars.filter { it.isLocal },
             synced = calendars.filterNot { it.isLocal },
+            disabledIds = disabledIds,
             error = error,
             onConsumeError = viewModel::consumeError,
             backupResult = backupResult,
             onExportBackup = viewModel::exportBackup,
+            onImport = onImport,
             onConsumeBackupResult = viewModel::consumeBackupResult,
+            autoBackup = autoBackup,
+            onSetAutoBackupEnabled = viewModel::setAutoBackupEnabled,
+            onSetAutoBackupInterval = viewModel::setAutoBackupIntervalMinutes,
+            onSetAutoBackupFolder = viewModel::setAutoBackupFolder,
             onBack = onBack,
             onAdd = { editorSession++; editorId = NEW_CALENDAR_ID },
             onEdit = { calendar -> editorSession++; editorId = calendar.id },
+            onSetDisabled = viewModel::setDisabled,
+            onSetAccountDisabled = viewModel::setAccountDisabled,
         )
     }
 }
@@ -150,17 +200,29 @@ fun CalendarsScreen(
 private fun CalendarsList(
     local: List<CalendarSource>,
     synced: List<CalendarSource>,
+    disabledIds: Set<Long>,
     error: Boolean,
     onConsumeError: () -> Unit,
     backupResult: BackupResult?,
-    onExportBackup: (android.net.Uri) -> Unit,
+    onExportBackup: (android.net.Uri, Set<Long>?) -> Unit,
+    onImport: (android.net.Uri) -> Unit,
     onConsumeBackupResult: () -> Unit,
+    autoBackup: AutoBackupUiState,
+    onSetAutoBackupEnabled: (Boolean) -> Unit,
+    onSetAutoBackupInterval: (Long) -> Unit,
+    onSetAutoBackupFolder: (android.net.Uri) -> Unit,
     onBack: () -> Unit,
     onAdd: () -> Unit,
     onEdit: (CalendarSource) -> Unit,
+    onSetDisabled: (Long, Boolean) -> Unit,
+    onSetAccountDisabled: (Collection<Long>, Boolean) -> Unit,
 ) {
     val context = LocalContext.current
     val snackbarHostState = remember { SnackbarHostState() }
+    // Accounts the user has folded shut; empty = all expanded (keeps every
+    // calendar visible by default, the section is collapsible for tidiness).
+    var collapsedAccounts by remember { mutableStateOf(emptySet<String>()) }
+    var localExpanded by remember { mutableStateOf(true) }
     val writeErrorText = stringResource(R.string.calendars_write_error)
 
     LaunchedEffect(error) {
@@ -171,10 +233,26 @@ private fun CalendarsList(
     }
 
     // SAF "create document" target for the backup file. The picked Uri is handed
-    // to the VM to stream the .ics into.
+    // to the VM to stream the .ics into. This launcher exports everything
+    // eligible (null); the per-calendar selector owns its own launcher.
     val createBackup = rememberLauncherForActivityResult(
         contract = ActivityResultContracts.CreateDocument("text/calendar"),
-    ) { uri -> uri?.let(onExportBackup) }
+    ) { uri -> uri?.let { onExportBackup(it, null) } }
+    var showExportPicker by rememberSaveable { mutableStateOf(false) }
+
+    // SAF "open document" picker for restoring events from a .ics file. The
+    // picked Uri is handed up to the host, which runs it through the same import
+    // flow as an externally opened .ics (parse, dedup by UID, target picker).
+    val openBackup = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.OpenDocument(),
+    ) { uri -> uri?.let(onImport) }
+
+    // SAF folder picker for the automatic-backup destination; the VM persists the
+    // write grant so background runs can keep writing to it.
+    val pickFolder = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.OpenDocumentTree(),
+    ) { uri -> uri?.let(onSetAutoBackupFolder) }
+    var showInterval by remember { mutableStateOf(false) }
 
     val backupFailedText = stringResource(R.string.calendars_backup_failed)
     LaunchedEffect(backupResult) {
@@ -199,83 +277,276 @@ private fun CalendarsList(
         title = stringResource(R.string.calendars_title),
         onBack = onBack,
         snackbarHost = { SnackbarHost(snackbarHostState) },
+        predictiveBack = true,
+    ) {
+        // What the per-calendar / per-account switches below actually do.
+        HintText(stringResource(R.string.calendars_disable_hint))
+
+        // Local (device-only) calendars — one collapsible group. The header's
+        // "+" adds a calendar; the switch enables/disables them all at once;
+        // tapping a calendar row opens its editor.
+        val localDisabled = local.isNotEmpty() && local.all { it.id in disabledIds }
+        CalendarGroup(
+            title = stringResource(R.string.calendars_local_header),
+            expanded = localExpanded,
+            bodyHasRows = local.isNotEmpty(),
+            headerDisabled = localDisabled,
+            leading = { Box(dimIf(localDisabled)) { LeadingAvatar(Icons.Default.PhoneAndroid) } },
+            manageIcon = Icons.Default.Add,
+            manageLabel = stringResource(R.string.calendars_add),
+            onManage = onAdd,
+            onToggleExpand = { localExpanded = !localExpanded },
+            showToggleAll = local.isNotEmpty(),
+            allEnabled = local.none { it.id in disabledIds },
+            onToggleAll = { enabled -> onSetAccountDisabled(local.map { it.id }, !enabled) },
         ) {
-        // Local (device-only) calendars — the calendars the app owns. The
-        // "Add calendar" entry closes the group as its final row.
-        SectionHeader(stringResource(R.string.calendars_local_header))
             if (local.isEmpty()) {
                 HintText(stringResource(R.string.calendars_local_empty))
-        }
-        val localCount = local.size + 1
+            } else {
                 local.forEachIndexed { index, calendar ->
+                    val disabled = calendar.id in disabledIds
                     GroupedRow(
                         title = calendar.displayName,
                         summary = calendar.description,
-                position = positionOf(index, localCount),
-                leading = { CalendarColorChip(calendar.color) },
+                        position = if (index == local.lastIndex) Position.Bottom else Position.Middle,
+                        container = MaterialTheme.colorScheme.surfaceContainerHighest,
+                        dimmed = disabled,
+                        leading = { CalendarColorChip(calendar.color, dimIf(disabled)) },
                         trailing = {
-                    Icon(
-                        Icons.Default.Edit,
-                        contentDescription = stringResource(R.string.calendars_edit_title),
-                        tint = MaterialTheme.colorScheme.onSurfaceVariant,
-                        modifier = Modifier.size(20.dp),
+                            EnableSwitch(
+                                calendarName = calendar.displayName,
+                                enabled = !disabled,
+                                onToggle = { enabled -> onSetDisabled(calendar.id, !enabled) },
                             )
                         },
                         onClick = { onEdit(calendar) },
                     )
                 }
-        GroupedRow(
-            title = stringResource(R.string.calendars_add),
-            position = positionOf(local.size, localCount),
-            leading = { AddAvatar() },
-            onClick = onAdd,
-        )
+            }
+        }
 
         // Backup — local calendars have no sync, so a .ics export is their only
-        // safety net. Offered only when there is something to back up.
-        if (local.isNotEmpty()) {
+        // safety net. Offered only when there is something exportable: the user's
+        // own local calendars (managed special-dates mirrors don't count).
+        val exportable = local.filter { it.canModifyContents && !it.isManaged }
+        // Restore/import can target any writable, non-managed calendar (local or
+        // synced), so its availability is broader than export's.
+        val canImport = (local + synced).any { it.canModifyContents && !it.isManaged }
+        if (exportable.isNotEmpty()) {
             Spacer(Modifier.height(16.dp))
             SectionHeader(stringResource(R.string.calendars_backup_header))
             HintText(stringResource(R.string.calendars_backup_hint))
+            // One connected card: the one-time export on top, then automatic
+            // backup (and its folder/interval rows when on).
             GroupedRow(
                 title = stringResource(R.string.calendars_backup_action),
-                position = Position.Alone,
+                position = Position.Top,
                 leading = { LeadingAvatar(Icons.Default.FileDownload) },
                 onClick = {
+                    // With more than one exportable calendar, let the user choose
+                    // which to include; a single one exports straight away.
+                    if (exportable.size == 1) {
                         runCatching { createBackup.launch("calendula-backup-${LocalDate.now()}.ics") }
+                    } else {
+                        showExportPicker = true
+                    }
                 },
             )
+            GroupedRow(
+                title = stringResource(R.string.calendars_restore_action),
+                summary = stringResource(R.string.calendars_restore_hint),
+                position = Position.Middle,
+                leading = { LeadingAvatar(Icons.Default.FileUpload) },
+                onClick = {
+                    runCatching { openBackup.launch(RESTORE_MIME_TYPES) }
+                },
+            )
+            GroupedRow(
+                title = stringResource(R.string.calendars_auto_backup),
+                summary = stringResource(R.string.calendars_auto_backup_hint),
+                position = if (autoBackup.enabled) Position.Middle else Position.Bottom,
+                leading = { LeadingAvatar(Icons.Default.Schedule) },
+                trailing = {
+                    Switch(checked = autoBackup.enabled, onCheckedChange = onSetAutoBackupEnabled)
+                },
+                onClick = { onSetAutoBackupEnabled(!autoBackup.enabled) },
+            )
+            if (autoBackup.enabled) {
+                GroupedRow(
+                    title = stringResource(R.string.calendars_auto_backup_folder),
+                    summary = rememberFolderName(autoBackup.folderUri)
+                        ?: stringResource(R.string.calendars_auto_backup_folder_unset),
+                    position = Position.Middle,
+                    onClick = { runCatching { pickFolder.launch(null) } },
+                )
+                GroupedRow(
+                    title = stringResource(R.string.calendars_auto_backup_interval),
+                    summary = backupIntervalLabel(autoBackup.intervalMinutes),
+                    position = Position.Bottom,
+                    onClick = { showInterval = true },
+                )
+                HintText(backupStatusText(autoBackup.status))
+            }
+        } else if (canImport) {
+            // Nothing to back up (no writable local calendar), but events can
+            // still be restored into a writable calendar — offer restore on its
+            // own so it isn't hidden behind export eligibility.
+            Spacer(Modifier.height(16.dp))
+            SectionHeader(stringResource(R.string.calendars_restore_header))
+            HintText(stringResource(R.string.calendars_restore_hint))
+            GroupedRow(
+                title = stringResource(R.string.calendars_restore_action),
+                position = Position.Alone,
+                leading = { LeadingAvatar(Icons.Default.FileUpload) },
+                onClick = { runCatching { openBackup.launch(RESTORE_MIME_TYPES) } },
+            )
         }
 
         Spacer(Modifier.height(16.dp))
 
-        // Synced calendars — read-only, grouped by account, each with a
-        // per-account "manage in source app" link.
+        // Synced calendars — read-only, grouped by account. Each account is a
+        // collapsible group whose header opens the source app (icon) and toggles
+        // all of its calendars at once (switch).
         SectionHeader(stringResource(R.string.calendars_synced_header))
         HintText(stringResource(R.string.calendars_synced_hint))
         synced
             .groupBy { it.accountName.ifBlank { it.accountType } }
             .forEach { (account, cals) ->
-                AccountHeader(account = account, accountType = cals.first().accountType)
+                val expanded = account !in collapsedAccounts
+                val accountType = cals.first().accountType
+                val accountDisabled = cals.all { it.id in disabledIds }
+                Spacer(Modifier.height(16.dp))
+                CalendarGroup(
+                    title = account,
+                    expanded = expanded,
+                    bodyHasRows = true,
+                    headerDisabled = accountDisabled,
+                    leading = { Box(dimIf(accountDisabled)) { SourceLogo(accountType) } },
+                    manageIcon = Icons.AutoMirrored.Filled.OpenInNew,
+                    manageLabel = stringResource(R.string.calendars_manage_in_app),
+                    onManage = {
+                        runCatching { context.startActivity(sourceAppIntent(context, accountType)) }
+                    },
+                    onToggleExpand = {
+                        collapsedAccounts = if (expanded) {
+                            collapsedAccounts + account
+                        } else {
+                            collapsedAccounts - account
+                        }
+                    },
+                    showToggleAll = true,
+                    allEnabled = cals.none { it.id in disabledIds },
+                    onToggleAll = { enabled -> onSetAccountDisabled(cals.map { it.id }, !enabled) },
+                ) {
                     cals.forEachIndexed { index, calendar ->
+                        val disabled = calendar.id in disabledIds
                         GroupedRow(
                             title = calendar.displayName,
-                        position = positionOf(index, cals.size),
-                        leading = { CalendarColorChip(calendar.color) },
+                            position = if (index == cals.lastIndex) Position.Bottom else Position.Middle,
+                            container = MaterialTheme.colorScheme.surfaceContainerHighest,
+                            dimmed = disabled,
+                            leading = { CalendarColorChip(calendar.color, dimIf(disabled)) },
+                            trailing = {
+                                EnableSwitch(
+                                    calendarName = calendar.displayName,
+                                    enabled = !disabled,
+                                    onToggle = { enabled -> onSetDisabled(calendar.id, !enabled) },
                                 )
-                }
-            }
-        Spacer(Modifier.height(8.dp))
-        GroupedRow(
-            title = stringResource(R.string.calendars_add_account),
-            position = Position.Alone,
-            leading = { AddAvatar() },
-            onClick = {
-                runCatching { context.startActivity(Intent(Settings.ACTION_ADD_ACCOUNT)) }
                             },
                         )
                     }
                 }
+            }
+    }
+
+    if (showInterval) {
+        BackupIntervalDialog(
+            currentMinutes = autoBackup.intervalMinutes,
+            onConfirm = onSetAutoBackupInterval,
+            onDismiss = { showInterval = false },
+        )
+    }
+
+    if (showExportPicker) {
+        ExportCalendarPicker(
+            calendars = local.filter { it.canModifyContents && !it.isManaged },
+            onExport = onExportBackup,
+            onDismiss = { showExportPicker = false },
+        )
+    }
+}
+
+/**
+ * Choose which local calendars to include in a one-time `.ics` export. Defaults
+ * to all selected; the Export action opens the SAF save dialog and hands back
+ * the picked file with the chosen calendar ids.
+ */
+@Composable
+private fun ExportCalendarPicker(
+    calendars: List<CalendarSource>,
+    onExport: (android.net.Uri, Set<Long>?) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    // Seed once with everything selected and hold it across recomposition and
+    // rotation. NOT keyed on [calendars]: the list is observer-driven, so keying
+    // it would silently reset the user's de-selections whenever the provider
+    // re-emits (a background sync, a recolor). Ids that later vanish are harmless
+    // — the data layer intersects the chosen set with the eligible calendars.
+    var selected by rememberSaveable(
+        stateSaver = listSaver(
+            save = { it.toList() },
+            restore = { it.toSet() },
+        ),
+    ) {
+        mutableStateOf(calendars.map { it.id }.toSet())
+    }
+    val createBackup = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.CreateDocument("text/calendar"),
+    ) { uri ->
+        if (uri != null) {
+            onExport(uri, selected)
+            onDismiss()
+        }
+    }
+
+    FullScreenPicker(
+        title = stringResource(R.string.calendars_export_title),
+        onDismiss = onDismiss,
+    ) {
+        HintText(stringResource(R.string.calendars_export_hint))
+        calendars.forEachIndexed { index, calendar ->
+            val isSelected = calendar.id in selected
+            GroupedRow(
+                title = calendar.displayName,
+                summary = calendar.description,
+                position = positionOf(index, calendars.size),
+                leading = { CalendarColorChip(calendar.color) },
+                trailing = {
+                    Checkbox(
+                        checked = isSelected,
+                        onCheckedChange = { checked ->
+                            selected = if (checked) selected + calendar.id else selected - calendar.id
+                        },
+                    )
+                },
+                onClick = {
+                    selected = if (isSelected) selected - calendar.id else selected + calendar.id
+                },
+            )
+        }
+        Button(
+            onClick = {
+                runCatching { createBackup.launch("calendula-backup-${LocalDate.now()}.ics") }
+            },
+            enabled = selected.isNotEmpty(),
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 16.dp, vertical = 16.dp),
+        ) {
+            Text(stringResource(R.string.calendars_export_action))
+        }
+    }
+}
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -295,10 +566,9 @@ private fun CalendarEditor(
     var confirmDelete by remember { mutableStateOf(false) }
     val dark = isSystemInDarkTheme()
 
-    BackHandler(onBack = onClose)
-
     Scaffold(
         modifier = Modifier
+            .predictiveBack(onBack = onClose)
             .fillMaxSize()
             .background(MaterialTheme.colorScheme.surface),
         topBar = {
@@ -375,7 +645,7 @@ private fun CalendarEditor(
                 )
                 Spacer(Modifier.height(12.dp))
                 ColorSwatchRow(
-                    colors = CALENDAR_COLOR_PALETTE,
+                    colors = CalendarColorPalette.all,
                     selected = color,
                     onSelect = { color = it },
                     dark = dark,
@@ -425,6 +695,30 @@ private fun CalendarEditor(
     }
 }
 
+/**
+ * The per-row enable/disable control. Checked = the calendar is shown in the
+ * app; unchecking disables it (events, filters and pickers all drop it) without
+ * touching any provider data. Carries its own content description so the toggle
+ * is self-describing to screen readers even on a dimmed row.
+ */
+@Composable
+private fun EnableSwitch(
+    calendarName: String,
+    enabled: Boolean,
+    onToggle: (Boolean) -> Unit,
+) {
+    val label = stringResource(R.string.calendars_show_in_app_a11y, calendarName)
+    Switch(
+        checked = enabled,
+        onCheckedChange = onToggle,
+        modifier = Modifier.semantics { contentDescription = label },
+    )
+}
+
+/** Fade a leading element to the M3 disabled emphasis when [disabled]. */
+private fun dimIf(disabled: Boolean): Modifier =
+    if (disabled) Modifier.alpha(0.38f) else Modifier
+
 /** Tonal field card matching the event editor's design (icon + content). */
 @Composable
 private fun EditorCard(
@@ -456,68 +750,135 @@ private fun EditorCard(
     }
 }
 
+/**
+ * One collapsible calendar group rendered as a connected card. The header row is
+ * the card's top (tap to expand/collapse): a [leading] source mark (the account
+ * app's logo, or a device chip for local), the group [title] and a trailing
+ * overflow (⋮) menu holding the account-level actions — enable/disable every
+ * calendar at once (when [showToggleAll]) and the manage/add action
+ * ([manageIcon] / [manageLabel] → [onManage]). The group's calendars render as
+ * the rows below via [body].
+ *
+ * The header keeps the standard row colour; the calendars it reveals sit one tone
+ * darker, so the group reads as a header over nested content. Once [headerDisabled]
+ * (every calendar switched off) the header fades to the disabled emphasis so the
+ * whole group reads as off — not just via the menu. [bodyHasRows] is false when no
+ * calendar rows follow (e.g. an empty local group), so the header stays a
+ * standalone card rather than a top edge with nothing beneath it.
+ */
 @Composable
-private fun AccountHeader(account: String, accountType: String) {
-    val context = LocalContext.current
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(start = 28.dp, end = 16.dp, top = 16.dp, bottom = 4.dp),
-        verticalAlignment = Alignment.CenterVertically,
+private fun CalendarGroup(
+    title: String,
+    expanded: Boolean,
+    bodyHasRows: Boolean,
+    headerDisabled: Boolean,
+    leading: @Composable () -> Unit,
+    manageIcon: ImageVector,
+    manageLabel: String,
+    onManage: () -> Unit,
+    onToggleExpand: () -> Unit,
+    showToggleAll: Boolean,
+    allEnabled: Boolean,
+    onToggleAll: (Boolean) -> Unit,
+    body: @Composable ColumnScope.() -> Unit,
 ) {
+    GroupedRow(
+        title = title,
+        position = if (expanded && bodyHasRows) Position.Top else Position.Alone,
+        dimmed = headerDisabled,
+        leading = leading,
+        trailing = {
+            CalendarGroupMenu(
+                title = title,
+                showToggleAll = showToggleAll,
+                allEnabled = allEnabled,
+                onToggleAll = onToggleAll,
+                manageIcon = manageIcon,
+                manageLabel = manageLabel,
+                onManage = onManage,
+            )
+        },
+        onClick = onToggleExpand,
+    )
+    AnimatedVisibility(
+        visible = expanded,
+        enter = expandEnter(),
+        exit = collapseExit(),
+    ) {
+        Column(content = body)
+    }
+}
+
+/**
+ * The account header's overflow (⋮) menu: the two account-level actions that
+ * don't fit on one line — "Enable/Disable all" (when [showToggleAll]) and the
+ * manage/add action. A rounded, tonal dropdown matching the app's surfaces, with
+ * the two actions divided for clear separation.
+ */
+@Composable
+private fun CalendarGroupMenu(
+    title: String,
+    showToggleAll: Boolean,
+    allEnabled: Boolean,
+    onToggleAll: (Boolean) -> Unit,
+    manageIcon: ImageVector,
+    manageLabel: String,
+    onManage: () -> Unit,
+) {
+    var open by remember { mutableStateOf(false) }
+    Box {
+        IconButton(onClick = { open = true }) {
+            Icon(
+                Icons.Default.MoreVert,
+                contentDescription = stringResource(R.string.calendars_account_menu_a11y, title),
+            )
+        }
+        DropdownMenu(
+            expanded = open,
+            onDismissRequest = { open = false },
+            shape = RoundedCornerShape(20.dp),
+            // A distinct tone + a lifted shadow so the menu reads as floating
+            // above the cards (which sit at surfaceContainerHigh) rather than
+            // blending into them.
+            containerColor = MaterialTheme.colorScheme.surfaceContainerLowest,
+            tonalElevation = 0.dp,
+            shadowElevation = 6.dp,
+        ) {
+            if (showToggleAll) {
+                DropdownMenuItem(
+                    text = {
                         Text(
-            text = account,
-            style = MaterialTheme.typography.titleSmall,
-            fontWeight = FontWeight.SemiBold,
-            modifier = Modifier.weight(1f),
+                            stringResource(
+                                if (allEnabled) R.string.calendars_disable_all
+                                else R.string.calendars_enable_all,
+                            ),
+                        )
+                    },
+                    leadingIcon = {
+                        Icon(
+                            if (allEnabled) Icons.Default.VisibilityOff else Icons.Default.Visibility,
+                            contentDescription = null,
+                        )
+                    },
+                    onClick = {
+                        open = false
+                        onToggleAll(!allEnabled)
+                    },
+                )
+                HorizontalDivider(Modifier.padding(horizontal = 12.dp, vertical = 4.dp))
+            }
+            DropdownMenuItem(
+                text = { Text(manageLabel) },
+                leadingIcon = { Icon(manageIcon, contentDescription = null) },
+                onClick = {
+                    open = false
+                    onManage()
+                },
             )
-        OutlinedButton(onClick = {
-            runCatching { context.startActivity(sourceAppIntent(context, accountType)) }
-        }) {
-            Icon(Icons.Default.OpenInNew, contentDescription = null, modifier = Modifier.size(16.dp))
-            Spacer(Modifier.width(6.dp))
-            Text(stringResource(R.string.calendars_manage_in_app))
         }
     }
 }
 
-/** Neutral circular chip carrying an arbitrary icon — matches [AddAvatar]'s shape. */
-@Composable
-private fun LeadingAvatar(icon: ImageVector) {
-    Box(
-        modifier = Modifier
-            .size(40.dp)
-            .clip(CircleShape)
-            .background(MaterialTheme.colorScheme.surfaceContainerHighest),
-        contentAlignment = Alignment.Center,
-    ) {
-        Icon(
-            icon,
-            contentDescription = null,
-            tint = MaterialTheme.colorScheme.onSurfaceVariant,
-            modifier = Modifier.size(22.dp),
-        )
-    }
-}
-
-/** Neutral circular chip with a "+" — the leading icon for add-actions. */
-@Composable
-private fun AddAvatar() {
-    Box(
-        modifier = Modifier
-            .size(40.dp)
-            .clip(CircleShape)
-            .background(MaterialTheme.colorScheme.surfaceContainerHighest),
-        contentAlignment = Alignment.Center,
-    ) {
-        Icon(
-            Icons.Default.Add,
-            contentDescription = null,
-            tint = MaterialTheme.colorScheme.onSurfaceVariant,
-            modifier = Modifier.size(22.dp),
-        )
-    }
-}
 
 @Composable
 private fun SectionHeader(text: String) {
@@ -539,6 +900,95 @@ private fun HintText(text: String) {
     )
 }
 
+/** Readable name of the persisted backup folder, resolved from its tree Uri. */
+@Composable
+private fun rememberFolderName(uriString: String?): String? {
+    val context = LocalContext.current
+    return remember(uriString) {
+        uriString?.let {
+            runCatching { DocumentFile.fromTreeUri(context, it.toUri())?.name }.getOrNull()
+        }
+    }
+}
+
+/** "Every 30 minutes" / "Every 2 hours" / "Every day" — the interval in its largest whole unit. */
+@Composable
+private fun backupIntervalLabel(minutes: Long): String {
+    val duration = when {
+        minutes % MINUTES_PER_WEEK == 0L ->
+            pluralStringResource(R.plurals.duration_weeks, (minutes / MINUTES_PER_WEEK).toInt(), (minutes / MINUTES_PER_WEEK).toInt())
+        minutes % MINUTES_PER_DAY == 0L ->
+            pluralStringResource(R.plurals.duration_days, (minutes / MINUTES_PER_DAY).toInt(), (minutes / MINUTES_PER_DAY).toInt())
+        minutes % 60L == 0L ->
+            pluralStringResource(R.plurals.duration_hours, (minutes / 60L).toInt(), (minutes / 60L).toInt())
+        else ->
+            pluralStringResource(R.plurals.duration_minutes, minutes.toInt(), minutes.toInt())
+    }
+    return stringResource(R.string.calendars_auto_backup_every, duration)
+}
+
+/** "Last backup: 5 minutes ago" / "… failed" / "No automatic backup yet". */
+@Composable
+private fun backupStatusText(status: BackupStatus): String {
+    if (status.lastRun == 0L) return stringResource(R.string.calendars_auto_backup_status_never)
+    val relative = DateUtils.getRelativeTimeSpanString(
+        status.lastRun, System.currentTimeMillis(), DateUtils.MINUTE_IN_MILLIS,
+    ).toString()
+    return if (status.lastSuccess) {
+        stringResource(R.string.calendars_auto_backup_status_ok, relative)
+    } else {
+        stringResource(R.string.calendars_auto_backup_status_failed, relative)
+    }
+}
+
+/** Amount + unit picker for the backup interval (floored at 30 minutes). */
+@Composable
+private fun BackupIntervalDialog(
+    currentMinutes: Long,
+    onConfirm: (Long) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    // minutes-per-unit for each entry; pick the largest unit the current value divides into.
+    val unitMinutes = remember { listOf(1L, 60L, MINUTES_PER_DAY, MINUTES_PER_WEEK) }
+    val units = stringArrayResource(R.array.backup_interval_units).toList()
+    val initialUnit = unitMinutes.indexOfLast { currentMinutes % it == 0L }.coerceAtLeast(0)
+    var amount by rememberSaveable { mutableStateOf((currentMinutes / unitMinutes[initialUnit]).toString()) }
+    var unitIndex by rememberSaveable { mutableStateOf(initialUnit) }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(stringResource(R.string.calendars_auto_backup_interval)) },
+        text = {
+            Column {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    DialogAmountField(value = amount, onValueChange = { amount = it }, placeholder = "1")
+                    Spacer(Modifier.width(12.dp))
+                    DialogUnitDropdown(label = units[unitIndex], entries = units) { unitIndex = it }
+                }
+                Spacer(Modifier.height(8.dp))
+                Text(
+                    text = stringResource(R.string.calendars_auto_backup_interval_min),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        },
+        confirmButton = {
+            TextButton(onClick = {
+                val value = amount.toLongOrNull()?.coerceAtLeast(1L) ?: 1L
+                onConfirm((value * unitMinutes[unitIndex]).coerceAtLeast(SettingsPrefs.MIN_BACKUP_INTERVAL))
+                onDismiss()
+            }) { Text(stringResource(R.string.reminder_custom_set)) }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) { Text(stringResource(R.string.dialog_cancel)) }
+        },
+    )
+}
+
+private const val MINUTES_PER_DAY = 1_440L
+private const val MINUTES_PER_WEEK = 10_080L
+
 /**
  * Pick the app to open for managing a synced calendar's account. The account's
  * own authenticator package (resolved from [AccountManager], no permission
@@ -563,9 +1013,3 @@ private fun sourceAppIntent(context: Context, accountType: String): Intent {
     return Intent(Settings.ACTION_SYNC_SETTINGS)
 }
 
-/** Preferred app for account types whose authenticator isn't the app to open. */
-private fun curatedSourcePackage(accountType: String): String? = when {
-    accountType.equals("com.google", ignoreCase = true) -> "com.google.android.calendar"
-    else -> null
-}
-

app/src/main/java/de/jeanlucmakiola/calendula/ui/calendars/CalendarsViewModel.kt

@@ -1,12 +1,21 @@
 package de.jeanlucmakiola.calendula.ui.calendars
 
+import android.content.Context
+import android.content.Intent
 import android.net.Uri
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
+import dagger.hilt.android.qualifiers.ApplicationContext
+import de.jeanlucmakiola.calendula.data.backup.BackupScheduler
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
 import de.jeanlucmakiola.calendula.data.di.IoDispatcher
 import de.jeanlucmakiola.calendula.data.ics.IcsExporter
+import de.jeanlucmakiola.calendula.data.prefs.BackupStatus
+import de.jeanlucmakiola.calendula.data.prefs.CalendarPrefs
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.data.reminders.ReminderNotifier
+import de.jeanlucmakiola.calendula.data.reminders.SuppressedReminderStore
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.ics.IcsWriter
 import kotlinx.coroutines.CoroutineDispatcher
@@ -15,6 +24,8 @@ import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
@@ -31,8 +42,13 @@ import javax.inject.Inject
  */
 @HiltViewModel
 class CalendarsViewModel @Inject constructor(
+    @ApplicationContext private val context: Context,
     private val repository: CalendarRepository,
     private val icsExporter: IcsExporter,
+    private val prefs: CalendarPrefs,
+    private val settingsPrefs: SettingsPrefs,
+    private val suppressedStore: SuppressedReminderStore,
+    private val notifier: ReminderNotifier,
     @IoDispatcher private val io: CoroutineDispatcher,
 ) : ViewModel() {
 
@@ -46,6 +62,36 @@ class CalendarsViewModel @Inject constructor(
                 initialValue = emptyList(),
             )
 
+    /**
+     * Calendars the user has disabled in the app. This screen is the only
+     * surface that lists them, so it both reads the set (to dim the rows) and
+     * toggles it. Every other surface simply excludes these ids.
+     */
+    val disabledCalendarIds: StateFlow<Set<Long>> =
+        prefs.disabledCalendarIds
+            .flowOn(io)
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(5_000L),
+                initialValue = emptySet(),
+            )
+
+    /** Automatic-backup settings + last-run status, for the Backup section UI. */
+    val autoBackup: StateFlow<AutoBackupUiState> = combine(
+        settingsPrefs.autoBackupEnabled,
+        settingsPrefs.autoBackupIntervalMinutes,
+        settingsPrefs.autoBackupFolderUri,
+        settingsPrefs.autoBackupStatus,
+    ) { enabled, interval, folder, status ->
+        AutoBackupUiState(enabled, interval, folder, status)
+    }
+        .flowOn(io)
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5_000L),
+            initialValue = AutoBackupUiState(),
+        )
+
     private val _error = MutableStateFlow(false)
     val error: StateFlow<Boolean> = _error.asStateFlow()
 
@@ -61,11 +107,11 @@ class CalendarsViewModel @Inject constructor(
      * document [uri] as one `VCALENDAR`. Result (event count, or failure) lands
      * in [backupResult] for a one-shot message.
      */
-    fun exportBackup(uri: Uri) {
+    fun exportBackup(uri: Uri, calendarIds: Set<Long>? = null) {
         viewModelScope.launch {
             _backupResult.value = try {
                 val count = withContext(io) {
-                    val events = repository.exportEvents()
+                    val events = repository.exportEvents(calendarIds)
                     icsExporter.writeDocument(
                         uri = uri,
                         content = IcsWriter().writeCalendar(events, Clock.System.now()),
@@ -93,6 +139,101 @@ class CalendarsViewModel @Inject constructor(
         repository.deleteCalendar(id)
     }
 
+    /**
+     * Enable or disable a calendar app-side. Disabling removes it from every
+     * surface but Settings → Calendars (and hides its events) without touching
+     * provider data — purely a reversible Calendula-local view choice.
+     */
+    fun setDisabled(id: Long, disabled: Boolean) {
+        viewModelScope.launch {
+            val current = prefs.disabledCalendarIds.first()
+            val next = if (disabled) current + id else current - id
+            if (next != current) {
+                prefs.setDisabledCalendarIds(next)
+                if (!disabled) recoverReminders(setOf(id))
+            }
+        }
+    }
+
+    /**
+     * Enable or disable every calendar of one account in a single write — the
+     * "toggle all" affordance on an account header. Done as one set update so the
+     * per-calendar [setDisabled] calls can't race each other.
+     */
+    fun setAccountDisabled(ids: Collection<Long>, disabled: Boolean) {
+        viewModelScope.launch {
+            val current = prefs.disabledCalendarIds.first()
+            val next = if (disabled) current + ids else current - ids.toSet()
+            if (next != current) {
+                prefs.setDisabledCalendarIds(next)
+                if (!disabled) recoverReminders(current intersect ids.toSet())
+            }
+        }
+    }
+
+    /**
+     * Re-post the reminders that fired while [reEnabledIds] were disabled and are
+     * still relevant (event not yet over), then drop them from the stash. Runs
+     * after the disabled set is written, so the notifier's own disabled gate lets
+     * them through. Best-effort at re-enable time: it mirrors the receiver gates
+     * (reminders on + postable), and there is no later re-scan, so alerts left
+     * unposted because those gates are closed are simply released.
+     */
+    private suspend fun recoverReminders(reEnabledIds: Set<Long>) {
+        if (reEnabledIds.isEmpty()) return
+        val recovered = suppressedStore.recoverFor(reEnabledIds, System.currentTimeMillis())
+        if (recovered.isNotEmpty() &&
+            settingsPrefs.remindersEnabled.first() &&
+            notifier.canPost()
+        ) {
+            recovered.forEach { notifier.post(it) }
+        }
+    }
+
+    // --- Automatic backup (issue #8) ------------------------------------
+
+    fun setAutoBackupEnabled(enabled: Boolean) {
+        viewModelScope.launch {
+            settingsPrefs.setAutoBackupEnabled(enabled)
+            reschedule()
+            // Give immediate feedback when turning it on with a folder already set.
+            if (enabled && settingsPrefs.autoBackupFolderUri.first() != null) {
+                BackupScheduler.runNow(context)
+            }
+        }
+    }
+
+    fun setAutoBackupIntervalMinutes(minutes: Long) {
+        viewModelScope.launch {
+            settingsPrefs.setAutoBackupIntervalMinutes(minutes)
+            reschedule()
+        }
+    }
+
+    /** Persist the chosen destination folder (taking a durable write grant) and run once. */
+    fun setAutoBackupFolder(uri: Uri) {
+        viewModelScope.launch {
+            runCatching {
+                context.contentResolver.takePersistableUriPermission(
+                    uri,
+                    Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION,
+                )
+            }
+            settingsPrefs.setAutoBackupFolderUri(uri.toString())
+            reschedule()
+            if (settingsPrefs.autoBackupEnabled.first()) BackupScheduler.runNow(context)
+        }
+    }
+
+    private suspend fun reschedule() {
+        BackupScheduler.apply(
+            context = context,
+            enabled = settingsPrefs.autoBackupEnabled.first(),
+            intervalMinutes = settingsPrefs.autoBackupIntervalMinutes.first(),
+            hasFolder = settingsPrefs.autoBackupFolderUri.first() != null,
+        )
+    }
+
     private inline fun write(crossinline block: suspend () -> Unit) {
         viewModelScope.launch {
             try {
@@ -106,6 +247,14 @@ class CalendarsViewModel @Inject constructor(
     }
 }
 
+/** Automatic-backup settings + last-run status for the Backup section. */
+data class AutoBackupUiState(
+    val enabled: Boolean = false,
+    val intervalMinutes: Long = SettingsPrefs.DEFAULT_BACKUP_INTERVAL,
+    val folderUri: String? = null,
+    val status: BackupStatus = BackupStatus(lastRun = 0L, lastSuccess = true, consecutiveFailures = 0),
+)
+
 /** Outcome of a whole-calendar backup, surfaced once to the screen. */
 sealed interface BackupResult {
     data class Success(val eventCount: Int) : BackupResult

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/CalendarColors.kt

@@ -13,22 +13,8 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
-
-/**
- * Soften a raw calendar color toward a pastel that fits the active theme.
- *  - Keeps the hue (so users still recognise their calendars)
- *  - Caps saturation so harsh provider colors stop screaming
- *  - Pins value/brightness to a band that reads on both light and dark surfaces
- */
-fun pastelize(rawArgb: Int, dark: Boolean): Color {
-    val hsv = FloatArray(3)
-    android.graphics.Color.colorToHSV(rawArgb, hsv)
-    hsv[1] = (hsv[1] * 0.6f).coerceIn(0.25f, 0.65f)
-    hsv[2] = if (dark) 0.82f else 0.72f
-    return Color(android.graphics.Color.HSVToColor(hsv))
-}
+import de.jeanlucmakiola.floret.components.pastelize
 
 /**
  * Leading avatar for a calendar: a neutral chip holding a calendar glyph tinted

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/CalendarDrawer.kt

@@ -37,6 +37,9 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.ui.filter.CalendarFilterList
+import de.jeanlucmakiola.floret.components.GroupedRow
+import de.jeanlucmakiola.floret.components.Position
+import de.jeanlucmakiola.floret.components.positionOf
 import kotlinx.datetime.LocalDate
 
 /**
@@ -59,6 +62,7 @@ fun CalendarDrawer(
     onSelectView: (CalendarView) -> Unit,
     onJumpToDate: (LocalDate) -> Unit,
     onSettings: () -> Unit,
+    viewOrder: List<CalendarView> = IMPLEMENTED_VIEWS,
 ) {
     var showDatePicker by remember { mutableStateOf(false) }
 
@@ -73,10 +77,10 @@ fun CalendarDrawer(
             DrawerHeader()
 
             DrawerSectionHeader(stringResource(R.string.view_section))
-            IMPLEMENTED_VIEWS.forEachIndexed { index, view ->
+            viewOrder.forEachIndexed { index, view ->
                 GroupedRow(
                     title = stringResource(view.labelRes),
-                    position = positionOf(index, IMPLEMENTED_VIEWS.size),
+                    position = positionOf(index, viewOrder.size),
                     selected = view == currentView,
                     minHeight = 56.dp,
                     leading = { Icon(view.icon, contentDescription = null) },

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/CalendarPickerGroups.kt

@@ -0,0 +1,182 @@
+package de.jeanlucmakiola.calendula.ui.common
+
+import android.accounts.AccountManager
+import android.content.Context
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.ColumnScope
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Check
+import androidx.compose.material.icons.filled.Cloud
+import androidx.compose.material.icons.filled.PhoneAndroid
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.ImageBitmap
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.core.graphics.drawable.toBitmap
+import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.domain.CalendarSource
+import de.jeanlucmakiola.floret.components.GroupedRow
+import de.jeanlucmakiola.floret.components.Position
+
+/**
+ * The app's single "which calendar" selection list, shared by the event editor
+ * and the .ics import screen. Renders the same grouped-card system as the
+ * calendar-manager screen: a category header per source — the device chip for
+ * the app's own calendars, the owning app's launcher icon for each synced
+ * account — with the calendars beneath it as a connected card, a colour chip on
+ * each and a check on the selected one. Emits into the caller's [ColumnScope]
+ * (a scrolling column), so the caller owns the surrounding chrome.
+ */
+@Composable
+fun ColumnScope.CalendarPickerGroups(
+    calendars: List<CalendarSource>,
+    selectedId: Long?,
+    onSelect: (Long) -> Unit,
+) {
+    val local = remember(calendars) { calendars.filter { it.isLocal } }
+    val syncedGroups = remember(calendars) {
+        calendars.filterNot { it.isLocal }
+            .groupBy { it.accountName.ifBlank { it.accountType }.ifBlank { it.displayName } }
+            .toList()
+    }
+
+    if (local.isNotEmpty()) {
+        CalendarPickerGroup(
+            title = stringResource(R.string.calendars_local_header),
+            leading = { LeadingAvatar(Icons.Default.PhoneAndroid) },
+            calendars = local,
+            selectedId = selectedId,
+            onSelect = onSelect,
+        )
+    }
+    syncedGroups.forEachIndexed { index, (account, cals) ->
+        if (local.isNotEmpty() || index > 0) Spacer(Modifier.height(16.dp))
+        CalendarPickerGroup(
+            title = account,
+            leading = { SourceLogo(cals.first().accountType) },
+            calendars = cals,
+            selectedId = selectedId,
+            onSelect = onSelect,
+        )
+    }
+}
+
+/** One account's category header (avatar + name) atop its selectable calendars. */
+@Composable
+private fun CalendarPickerGroup(
+    title: String,
+    leading: @Composable () -> Unit,
+    calendars: List<CalendarSource>,
+    selectedId: Long?,
+    onSelect: (Long) -> Unit,
+) {
+    GroupedRow(
+        title = title,
+        position = Position.Top,
+        leading = leading,
+    )
+    calendars.forEachIndexed { index, calendar ->
+        val isSelected = calendar.id == selectedId
+        GroupedRow(
+            title = calendar.displayName,
+            position = if (index == calendars.lastIndex) Position.Bottom else Position.Middle,
+            selected = isSelected,
+            leading = { CalendarColorChip(calendar.color) },
+            trailing = if (isSelected) {
+                {
+                    Icon(
+                        imageVector = Icons.Default.Check,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary,
+                    )
+                }
+            } else {
+                null
+            },
+            onClick = { onSelect(calendar.id) },
+        )
+    }
+}
+
+/**
+ * The source app's launcher icon (Google Calendar, DAVx5, Nextcloud, …) as a
+ * round 40dp chip, so each synced account is recognisable at a glance. We load
+ * whatever app owns the account from [android.content.pm.PackageManager] rather
+ * than bundling brand logos — always accurate, nothing to license. Falls back to
+ * a neutral cloud chip when no installed app resolves for the account.
+ */
+@Composable
+fun SourceLogo(accountType: String) {
+    val context = LocalContext.current
+    val logo = remember(accountType) { sourceAppLogo(context, accountType) }
+    if (logo != null) {
+        Image(
+            bitmap = logo,
+            contentDescription = null,
+            contentScale = ContentScale.Crop,
+            modifier = Modifier
+                .size(40.dp)
+                .clip(CircleShape),
+        )
+    } else {
+        LeadingAvatar(Icons.Default.Cloud)
+    }
+}
+
+/** Neutral circular chip carrying an arbitrary icon (e.g. the local-device mark). */
+@Composable
+fun LeadingAvatar(icon: ImageVector) {
+    Box(
+        modifier = Modifier
+            .size(40.dp)
+            .clip(CircleShape)
+            .background(MaterialTheme.colorScheme.surfaceContainerHighest),
+        contentAlignment = Alignment.Center,
+    ) {
+        Icon(
+            icon,
+            contentDescription = null,
+            tint = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.size(22.dp),
+        )
+    }
+}
+
+/** The launcher icon of the app backing [accountType], preferring the human-facing app. */
+private fun sourceAppLogo(context: Context, accountType: String): ImageBitmap? {
+    val pm = context.packageManager
+    val candidates = buildList {
+        curatedSourcePackage(accountType)?.let { add(it) }
+        AccountManager.get(context).authenticatorTypes
+            .firstOrNull { it.type.equals(accountType, ignoreCase = true) }
+            ?.packageName
+            ?.let { add(it) }
+    }
+    for (pkg in candidates) {
+        val bitmap = runCatching { pm.getApplicationIcon(pkg).toBitmap() }.getOrNull()
+        if (bitmap != null) return bitmap.asImageBitmap()
+    }
+    return null
+}
+
+/** Preferred app for account types whose authenticator isn't the app to open. */
+internal fun curatedSourcePackage(accountType: String): String? = when {
+    accountType.equals("com.google", ignoreCase = true) -> "com.google.android.calendar"
+    else -> null
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/CalendarTransitions.kt

@@ -2,6 +2,8 @@ package de.jeanlucmakiola.calendula.ui.common
 
 import androidx.compose.animation.ContentTransform
 import androidx.compose.animation.core.FiniteAnimationSpec
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
 import androidx.compose.animation.slideInHorizontally
 import androidx.compose.animation.slideOutHorizontally
 import androidx.compose.animation.togetherWith
@@ -10,6 +12,16 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.unit.IntOffset
 
+/**
+ * Calendar-specific motion. The family's generic content transitions — section
+ * expand/collapse, item reveal, list relayout, cross-fade, predictive-back, and
+ * the reduce-motion check — now live in floret-kit's identity module
+ * (`expandEnter`, `collapseExit`, `itemEnter`, `animateItemMotion`,
+ * `fadeThrough`, `Modifier.predictiveBack`, `rememberReduceMotion`). What stays
+ * here is only what's specific to paging the calendar grid: the directional
+ * month/week/day slide and the specs that feed it.
+ */
+
 /**
  * The M3 Expressive spatial spring used for the month/week slide: the *fast*
  * spring-physics spec from the active motion scheme — snappy with a subtle
@@ -24,16 +36,34 @@ fun rememberCalendarSlideSpec(): FiniteAnimationSpec<IntOffset> =
     MaterialTheme.motionScheme.fastSpatialSpec()
 
 /**
- * Horizontal slide for navigating between adjacent months/weeks.
+ * The fast effects spec from the active motion scheme, for opacity (fade)
+ * transitions. Captured in composable scope alongside [rememberCalendarSlideSpec]
+ * for use in non-composable transition lambdas and as the reduced-motion fallback.
+ */
+@OptIn(ExperimentalMaterial3ExpressiveApi::class)
+@Composable
+fun rememberCalendarFadeSpec(): FiniteAnimationSpec<Float> =
+    MaterialTheme.motionScheme.fastEffectsSpec()
+
+/**
+ * Horizontal slide for navigating between adjacent months/weeks/days.
  *
  * @param slideDir     +1 = forward (incoming from the right), -1 = back, 0 = jump
  *                     (e.g. "today"); a jump reuses the forward direction.
  * @param spec         spatial animation spec, typically [rememberCalendarSlideSpec].
+ * @param fadeSpec     effects spec for the reduced-motion fade, typically
+ *                     [rememberCalendarFadeSpec].
+ * @param reduceMotion when true, swap the directional slide for a plain cross-fade.
  */
 fun calendarSlideTransition(
     slideDir: Int,
     spec: FiniteAnimationSpec<IntOffset>,
+    fadeSpec: FiniteAnimationSpec<Float>,
+    reduceMotion: Boolean,
 ): ContentTransform {
+    if (reduceMotion) {
+        return fadeIn(fadeSpec).togetherWith(fadeOut(fadeSpec))
+    }
     val dir = if (slideDir == 0) 1 else slideDir
     return slideInHorizontally(spec) { w -> dir * w }
         .togetherWith(slideOutHorizontally(spec) { w -> -dir * w })

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/CalendarView.kt

@@ -45,7 +45,63 @@ val IMPLEMENTED_VIEWS: List<CalendarView> =
 
 /** Next view in [available], wrapping around. Falls back to Month if absent. */
 fun CalendarView.next(available: List<CalendarView> = IMPLEMENTED_VIEWS): CalendarView {
+    if (available.isEmpty()) return this
     val i = available.indexOf(this)
-    if (i < 0) return available.firstOrNull() ?: CalendarView.Month
+    if (i < 0) return available.first()
     return available[(i + 1) % available.size]
 }
+
+/**
+ * The user's customisation of the top-bar quick-switch button (#24): which views
+ * it cycles through ([enabled]) and in what [order]. [order] always lists every
+ * implemented view — the settings screen reorders the whole set — while [cycle]
+ * is the subset the pill actually steps through, in [order]. The navigation
+ * drawer keeps its own separate order and always lists every view, so a view
+ * disabled here stays reachable there.
+ */
+data class QuickSwitchConfig(
+    val order: List<CalendarView>,
+    val enabled: Set<CalendarView>,
+) {
+    /** Views the pill steps through, in [order]. */
+    val cycle: List<CalendarView> get() = order.filter { it in enabled }
+
+    companion object {
+        /** All views, in default order, all enabled. */
+        val Default = QuickSwitchConfig(IMPLEMENTED_VIEWS, IMPLEMENTED_VIEWS.toSet())
+
+        /**
+         * Fewest views that keep the switch meaningful — a "switch" needs at
+         * least two targets, so the settings screen blocks disabling below this.
+         */
+        const val MIN_ENABLED = 2
+    }
+}
+
+/**
+ * The top-level view back stack (bottom → top): the [default] home view always
+ * sits at the bottom. Pressing back pops one level until only the home view
+ * remains, then the system exits the app. Three operations move it:
+ *
+ * - [selectView] — a lateral switch (the pill or the drawer). It keeps a visit
+ *   history so back retraces it: switching to a not-yet-visited view pushes it on
+ *   top; switching to one already in the stack pops back to it (collapsing the
+ *   loop, so the depth stays bounded by the number of distinct views). Selecting
+ *   the home view collapses to just `[default]`.
+ * - [viewBaseStack] — the stack a widget launch resets to: just `[default]` when
+ *   the widget's view is the home view, else `[default, source]`. A widget entry
+ *   starts a fresh context rather than extending in-app history.
+ * - [drillToDay] — pushes the day view on top (a date tap from the month grid or
+ *   a widget), unless the day view is already current.
+ */
+fun List<CalendarView>.selectView(target: CalendarView): List<CalendarView> {
+    val existing = indexOf(target)
+    return if (existing >= 0) take(existing + 1) else this + target
+}
+
+fun viewBaseStack(default: CalendarView, source: CalendarView): List<CalendarView> =
+    if (source == default) listOf(default) else listOf(default, source)
+
+/** Push the day view as a drill-in over the current stack (no-op if already on it). */
+fun List<CalendarView>.drillToDay(): List<CalendarView> =
+    if (lastOrNull() == CalendarView.Day) this else this + CalendarView.Day

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/ColorSwatchRow.kt

@@ -20,6 +20,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
+import de.jeanlucmakiola.floret.components.pastelize
 
 /**
  * A wrapping row of round colour swatches; the one matching [selected] is
@@ -67,16 +68,3 @@ fun ColorSwatchRow(
         }
     }
 }
-
-/** Google-Calendar-style palette; ARGB ints for a raw `CALENDAR_COLOR` / `EVENT_COLOR`. */
-val CALENDAR_COLOR_PALETTE: List<Int> = listOf(
-    0xFFD50000, // red
-    0xFFE67C00, // orange
-    0xFFF6BF26, // amber
-    0xFF33B679, // green
-    0xFF0B8043, // dark green
-    0xFF039BE5, // blue
-    0xFF3F51B5, // indigo
-    0xFF8E24AA, // purple
-    0xFF616161, // graphite
-).map { it.toInt() }

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/DialogControls.kt

@@ -1,94 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.common
-
-import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.ArrowDropDown
-import androidx.compose.material3.DropdownMenu
-import androidx.compose.material3.DropdownMenuItem
-import androidx.compose.material3.Icon
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.text.input.KeyboardType
-import androidx.compose.ui.unit.dp
-
-/**
- * Tonal 3-digit number input shared by the custom reminder/recurrence steps and
- * the reminder pickers — the app's [InlineTextField] over a tonal surface, so it
- * matches the card/grouped-row design language (not Material's outlined field).
- */
-@Composable
-fun DialogAmountField(
-    value: String,
-    onValueChange: (String) -> Unit,
-    placeholder: String,
-) {
-    // surfaceContainerHighest — the picker/dialog sits on surfaceContainerHigh,
-    // so anything lower vanishes.
-    Surface(
-        color = MaterialTheme.colorScheme.surfaceContainerHighest,
-        shape = RoundedCornerShape(12.dp),
-    ) {
-        InlineTextField(
-            value = value,
-            onValueChange = { text ->
-                if (text.length <= 3 && text.all(Char::isDigit)) onValueChange(text)
-            },
-            placeholder = placeholder,
-            textStyle = MaterialTheme.typography.titleMedium,
-            keyboardType = KeyboardType.Number,
-            modifier = Modifier
-                .width(72.dp)
-                .padding(horizontal = 14.dp, vertical = 12.dp),
-        )
-    }
-}
-
-/** Tonal dropdown trigger + menu shared by the custom reminder/recurrence steps and pickers. */
-@Composable
-fun DialogUnitDropdown(
-    label: String,
-    entries: List<String>,
-    onPick: (Int) -> Unit,
-) {
-    var open by remember { mutableStateOf(false) }
-    Box {
-        Surface(
-            color = MaterialTheme.colorScheme.surfaceContainerHighest,
-            shape = RoundedCornerShape(12.dp),
-            onClick = { open = true },
-        ) {
-            Row(
-                verticalAlignment = Alignment.CenterVertically,
-                modifier = Modifier.padding(start = 14.dp, end = 8.dp, top = 12.dp, bottom = 12.dp),
-            ) {
-                Text(text = label, style = MaterialTheme.typography.titleMedium)
-                Spacer(Modifier.width(4.dp))
-                Icon(imageVector = Icons.Default.ArrowDropDown, contentDescription = null)
-            }
-        }
-        DropdownMenu(expanded = open, onDismissRequest = { open = false }) {
-            entries.forEachIndexed { index, entry ->
-                DropdownMenuItem(
-                    text = { Text(entry) },
-                    onClick = {
-                        onPick(index)
-                        open = false
-                    },
-                )
-            }
-        }
-    }
-}

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/EventFormFieldVisuals.kt

@@ -0,0 +1,44 @@
+package de.jeanlucmakiola.calendula.ui.common
+
+import androidx.annotation.StringRes
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.Notes
+import androidx.compose.material.icons.filled.EventAvailable
+import androidx.compose.material.icons.filled.Lock
+import androidx.compose.material.icons.filled.Notifications
+import androidx.compose.material.icons.filled.Palette
+import androidx.compose.material.icons.filled.People
+import androidx.compose.material.icons.filled.Place
+import androidx.compose.material.icons.filled.Repeat
+import androidx.compose.ui.graphics.vector.ImageVector
+import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.domain.EventFormField
+
+/**
+ * The shared label and icon for each optional [EventFormField]. Both the event
+ * editor (which shows these fields) and the settings screen (which toggles their
+ * defaults) draw from this one mapping, so a field reads the same wherever it
+ * appears.
+ */
+@StringRes
+fun eventFormFieldLabel(field: EventFormField): Int = when (field) {
+    EventFormField.Location -> R.string.event_detail_location
+    EventFormField.Description -> R.string.event_detail_description
+    EventFormField.Reminders -> R.string.event_detail_reminders
+    EventFormField.Recurrence -> R.string.event_detail_recurrence
+    EventFormField.Availability -> R.string.event_edit_availability
+    EventFormField.Visibility -> R.string.event_edit_visibility
+    EventFormField.Color -> R.string.event_edit_color
+    EventFormField.Attendees -> R.string.event_edit_attendees
+}
+
+fun eventFormFieldIcon(field: EventFormField): ImageVector = when (field) {
+    EventFormField.Location -> Icons.Default.Place
+    EventFormField.Description -> Icons.AutoMirrored.Filled.Notes
+    EventFormField.Reminders -> Icons.Default.Notifications
+    EventFormField.Recurrence -> Icons.Default.Repeat
+    EventFormField.Availability -> Icons.Default.EventAvailable
+    EventFormField.Visibility -> Icons.Default.Lock
+    EventFormField.Color -> Icons.Default.Palette
+    EventFormField.Attendees -> Icons.Default.People
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/GroupedList.kt

@@ -1,205 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.common
-
-import androidx.activity.compose.BackHandler
-import androidx.compose.animation.core.animateDpAsState
-import androidx.compose.foundation.background
-import androidx.compose.foundation.interaction.MutableInteractionSource
-import androidx.compose.foundation.interaction.collectIsPressedAsState
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.ColumnScope
-import androidx.compose.foundation.layout.RowScope
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.consumeWindowInsets
-import androidx.compose.foundation.layout.heightIn
-import androidx.compose.foundation.layout.imePadding
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.rememberScrollState
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.foundation.verticalScroll
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.filled.ArrowBack
-import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
-import androidx.compose.material3.LargeTopAppBar
-import androidx.compose.material3.ListItem
-import androidx.compose.material3.ListItemDefaults
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Scaffold
-import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
-import androidx.compose.material3.TopAppBarDefaults
-import androidx.compose.material3.rememberTopAppBarState
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.remember
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.input.nestedscroll.nestedScroll
-import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.unit.Dp
-import androidx.compose.ui.unit.dp
-import de.jeanlucmakiola.calendula.R
-
-/**
- * Position of a row within a grouped list, after the Android-15 settings
- * pattern: a run of rows shares one rounded container, with full corners at the
- * group's outer edges and small corners between, separated by small gaps.
- */
-enum class Position { Top, Middle, Bottom, Alone }
-
-/** Maps an index within a group of [count] rows to its [Position]. */
-fun positionOf(index: Int, count: Int): Position = when {
-    count <= 1 -> Position.Alone
-    index == 0 -> Position.Top
-    index == count - 1 -> Position.Bottom
-    else -> Position.Middle
-}
-
-/**
- * The app's standard full-screen list scaffold: a collapsing [LargeTopAppBar]
- * whose title shrinks into the bar (next to the back button) as the content
- * scrolls. Content is a scrollable column that feeds the toolbar via nested
- * scroll. Used by Settings and the calendar manager so they share one shell.
- */
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-fun CollapsingScaffold(
-    title: String,
-    onBack: () -> Unit,
-    modifier: Modifier = Modifier,
-    snackbarHost: @Composable () -> Unit = {},
-    actions: @Composable RowScope.() -> Unit = {},
-    content: @Composable ColumnScope.() -> Unit,
-) {
-    BackHandler(onBack = onBack)
-    val scrollBehavior =
-        TopAppBarDefaults.exitUntilCollapsedScrollBehavior(rememberTopAppBarState())
-    Scaffold(
-        modifier = modifier
-            .fillMaxSize()
-            .background(MaterialTheme.colorScheme.surface)
-            .nestedScroll(scrollBehavior.nestedScrollConnection),
-        topBar = {
-            LargeTopAppBar(
-                title = { Text(title) },
-                navigationIcon = {
-                    IconButton(onClick = onBack) {
-                        Icon(
-                            Icons.AutoMirrored.Filled.ArrowBack,
-                            contentDescription = stringResource(R.string.settings_back),
-                        )
-                    }
-                },
-                actions = actions,
-                scrollBehavior = scrollBehavior,
-                colors = TopAppBarDefaults.topAppBarColors(
-                    scrolledContainerColor = MaterialTheme.colorScheme.surface,
-                ),
-            )
-        },
-        snackbarHost = snackbarHost,
-    ) { innerPadding ->
-        Column(
-            modifier = Modifier
-                .padding(innerPadding)
-                // Mark the scaffold's system-bar insets as consumed so the
-                // imePadding below adds only the keyboard height beyond them
-                // (max, not sum) — otherwise the nav-bar inset double-counts and
-                // leaves an empty strip above the keyboard.
-                .consumeWindowInsets(innerPadding)
-                .fillMaxSize()
-                // Paint the surface across the full area before imePadding carves
-                // into it, so any sliver above the keyboard reads as surface — not
-                // the dialog window's black — during the IME animation.
-                .background(MaterialTheme.colorScheme.surface)
-                // Shrink the scroll viewport by the keyboard inset so a focused
-                // field (e.g. the custom-reminder amount) can scroll into view.
-                .imePadding()
-                .verticalScroll(rememberScrollState())
-                .padding(top = 8.dp, bottom = 24.dp),
-            content = content,
-        )
-    }
-}
-
-/**
- * One row in a grouped list: an M3 [ListItem] over a tonal [Surface] whose
- * corner radii come from its [position] (so a run of rows reads as a single
- * rounded card). Corners round further on press. A null [onClick] makes the
- * row non-interactive (e.g. read-only entries).
- */
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-fun GroupedRow(
-    title: String,
-    position: Position,
-    modifier: Modifier = Modifier,
-    summary: String? = null,
-    selected: Boolean = false,
-    minHeight: Dp = 72.dp,
-    leading: @Composable (() -> Unit)? = null,
-    trailing: @Composable (() -> Unit)? = null,
-    onClick: (() -> Unit)? = null,
-) {
-    val interaction = remember { MutableInteractionSource() }
-    val pressed by interaction.collectIsPressedAsState()
-    val full by animateDpAsState(if (pressed) 36.dp else 22.dp, label = "fullCorner")
-    val small by animateDpAsState(if (pressed) 36.dp else 6.dp, label = "smallCorner")
-    val shape = when (position) {
-        Position.Alone -> RoundedCornerShape(full)
-        Position.Top -> RoundedCornerShape(
-            topStart = full, topEnd = full, bottomStart = small, bottomEnd = small,
-        )
-        Position.Middle -> RoundedCornerShape(small)
-        Position.Bottom -> RoundedCornerShape(
-            topStart = small, topEnd = small, bottomStart = full, bottomEnd = full,
-        )
-    }
-    val gap = when (position) {
-        Position.Top, Position.Middle -> Modifier.padding(bottom = 2.dp)
-        Position.Bottom, Position.Alone -> Modifier
-    }
-    val itemColors = if (selected) {
-        ListItemDefaults.colors(
-            containerColor = Color.Transparent,
-            headlineColor = MaterialTheme.colorScheme.onSecondaryContainer,
-            leadingIconColor = MaterialTheme.colorScheme.onSecondaryContainer,
-            supportingColor = MaterialTheme.colorScheme.onSecondaryContainer,
-            trailingIconColor = MaterialTheme.colorScheme.onSecondaryContainer,
-        )
-    } else {
-        ListItemDefaults.colors(containerColor = Color.Transparent)
-    }
-    val item: @Composable () -> Unit = {
-        ListItem(
-            headlineContent = { Text(title) },
-            supportingContent = summary?.let { text -> { Text(text) } },
-            leadingContent = leading,
-            trailingContent = trailing,
-            colors = itemColors,
-            modifier = Modifier.heightIn(min = minHeight),
-        )
-    }
-    val base = modifier
-        .fillMaxWidth()
-        .padding(horizontal = 16.dp)
-        .then(gap)
-    val containerColor = if (selected) {
-        MaterialTheme.colorScheme.secondaryContainer
-    } else {
-        MaterialTheme.colorScheme.surfaceContainerHigh
-    }
-    if (onClick != null) {
-        Surface(
-            onClick = onClick,
-            color = containerColor,
-            shape = shape,
-            interactionSource = interaction,
-            modifier = base,
-        ) { item() }
-    } else {
-        Surface(color = containerColor, shape = shape, modifier = base) { item() }
-    }
-}

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/HourLines.kt

@@ -0,0 +1,38 @@
+package de.jeanlucmakiola.calendula.ui.common
+
+import androidx.compose.runtime.staticCompositionLocalOf
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Color
+
+/**
+ * Whether the week/day timeline draws an hour separator line, from the
+ * `showHourLines` preference. Provided once at the app root (like
+ * [LocalUse24HourFormat]) so the timeline reads it without ViewModel plumbing.
+ * Defaults to off — the historical clean look.
+ */
+val LocalShowHourLines = staticCompositionLocalOf { false }
+
+/**
+ * Draw a faint separator line at the top of each hour (1..23) when [show] is
+ * true. Applied to a day column's content so each line sits over the column's
+ * background but beneath the event blocks. [hourHeightPx] is one hour's pixel
+ * height; [color] is resolved by the caller from the theme.
+ */
+fun Modifier.hourSeparatorLines(show: Boolean, hourHeightPx: Float, color: Color): Modifier =
+    if (!show) {
+        this
+    } else {
+        drawBehind {
+            for (hour in 1 until 24) {
+                val y = hour * hourHeightPx
+                drawLine(
+                    color = color,
+                    start = Offset(0f, y),
+                    end = Offset(size.width, y),
+                    strokeWidth = 1f,
+                )
+            }
+        }
+    }

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/InlineTextField.kt

@@ -1,74 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.common
-
-import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.text.BasicTextField
-import androidx.compose.foundation.text.KeyboardOptions
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.SolidColor
-import androidx.compose.ui.graphics.isSpecified
-import androidx.compose.ui.text.TextStyle
-import androidx.compose.ui.text.input.KeyboardCapitalization
-import androidx.compose.ui.text.input.KeyboardType
-import androidx.compose.ui.unit.dp
-
-/**
- * The app's borderless text input: no underline, no outline, just the tonal
- * card behind it. This is the standard input across the app — we deliberately
- * don't use Material's outlined/filled text fields, so anything that takes text
- * (the event form, the calendar manager, dialogs) uses this inside a tonal
- * [androidx.compose.material3.Surface].
- */
-@Composable
-fun InlineTextField(
-    value: String,
-    onValueChange: (String) -> Unit,
-    placeholder: String,
-    modifier: Modifier = Modifier
-        .fillMaxWidth()
-        .padding(vertical = 4.dp),
-    textStyle: TextStyle = MaterialTheme.typography.titleMedium,
-    singleLine: Boolean = true,
-    minLines: Int = 1,
-    keyboardType: KeyboardType = KeyboardType.Text,
-    capitalization: KeyboardCapitalization = KeyboardCapitalization.None,
-) {
-    val resolvedStyle = textStyle.copy(
-        color = if (textStyle.color.isSpecified) {
-            textStyle.color
-        } else {
-            MaterialTheme.colorScheme.onSurface
-        },
-    )
-    BasicTextField(
-        value = value,
-        onValueChange = onValueChange,
-        textStyle = resolvedStyle,
-        singleLine = singleLine,
-        minLines = minLines,
-        keyboardOptions = KeyboardOptions(
-            keyboardType = keyboardType,
-            capitalization = capitalization,
-        ),
-        cursorBrush = SolidColor(MaterialTheme.colorScheme.primary),
-        decorationBox = { innerTextField ->
-            Box {
-                if (value.isEmpty()) {
-                    // Clearly fainter than typed text, so a hint never reads as
-                    // prefilled content.
-                    Text(
-                        text = placeholder,
-                        style = resolvedStyle,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.5f),
-                    )
-                }
-                innerTextField()
-            }
-        },
-        modifier = modifier,
-    )
-}

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/NowLine.kt

@@ -0,0 +1,90 @@
+package de.jeanlucmakiola.calendula.ui.common
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.offset
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.State
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import kotlinx.coroutines.delay
+import kotlinx.datetime.LocalDate
+import kotlinx.datetime.TimeZone
+import kotlinx.datetime.toLocalDateTime
+import kotlin.time.Clock
+import kotlin.time.Instant
+
+private val DotSize = 8.dp
+private val LineThickness = 2.dp
+
+/**
+ * Current wall-clock instant that updates once a minute, re-aligning to each
+ * minute boundary (rather than ticking a fixed 60 s) so it never drifts toward
+ * the middle of a minute. Drives the "now" line in the day/week grids.
+ */
+@Composable
+fun rememberCurrentMinute(): State<Instant> {
+    val instant = remember { mutableStateOf(Clock.System.now()) }
+    LaunchedEffect(Unit) {
+        while (true) {
+            val now = Clock.System.now()
+            instant.value = now
+            delay(60_000L - now.toEpochMilliseconds() % 60_000L)
+        }
+    }
+    return instant
+}
+
+/**
+ * A thin "current time" indicator — a leading dot plus a line — drawn across a
+ * day column. Positioned on the same [hourHeight] scale the event blocks use so
+ * it lines up with the grid, and refreshed each minute. Renders nothing unless
+ * the wall clock is on [date]; callers mount it only for the column showing
+ * today, so the per-minute tick runs on a single column.
+ */
+@Composable
+fun NowLine(
+    date: LocalDate,
+    hourHeight: Dp,
+    modifier: Modifier = Modifier,
+) {
+    val now by rememberCurrentMinute()
+    val local = now.toLocalDateTime(TimeZone.currentSystemDefault())
+    if (local.date != date) return
+
+    val minutes = local.hour * 60 + local.minute
+    val top = hourHeight * (minutes / 60f)
+    val color = MaterialTheme.colorScheme.primary
+    Box(
+        modifier = modifier
+            .fillMaxWidth()
+            .height(DotSize)
+            .offset(y = top - DotSize / 2),
+        contentAlignment = Alignment.CenterStart,
+    ) {
+        Box(
+            modifier = Modifier
+                .fillMaxWidth()
+                .height(LineThickness)
+                .background(color),
+        )
+        // The dot anchors the line to the gutter edge, mirroring the standard
+        // calendar "now" marker; drawn after the line so it sits on top.
+        Box(
+            modifier = Modifier
+                .size(DotSize)
+                .background(color, CircleShape),
+        )
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/OptionCard.kt

@@ -1,94 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.common
-
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material3.Icon
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.graphics.isSpecified
-import androidx.compose.ui.graphics.vector.ImageVector
-import androidx.compose.ui.unit.dp
-
-/**
- * The app's standard pick in a selection dialog: a full-width tonal card,
- * optionally with a leading icon and a supporting line; the selected option
- * is highlighted. Stack with 8dp gaps inside an AlertDialog — this is the
- * only sanctioned selection-modal style (no radio rows, no bare text lists).
- */
-@Composable
-fun OptionCard(
-    label: String,
-    onClick: () -> Unit,
-    modifier: Modifier = Modifier,
-    icon: ImageVector? = null,
-    /** Icon tint override, e.g. a calendar colour; unspecified follows selection. */
-    iconTint: Color = Color.Unspecified,
-    supportingText: String? = null,
-    selected: Boolean = false,
-    /** Label colour override, e.g. primary for an emphasised "Custom" entry. */
-    labelColor: Color = Color.Unspecified,
-) {
-    val contentColor = if (selected) {
-        MaterialTheme.colorScheme.onSecondaryContainer
-    } else {
-        MaterialTheme.colorScheme.onSurface
-    }
-    Surface(
-        onClick = onClick,
-        color = if (selected) {
-            MaterialTheme.colorScheme.secondaryContainer
-        } else {
-            MaterialTheme.colorScheme.surfaceContainerHighest
-        },
-        shape = RoundedCornerShape(12.dp),
-        modifier = modifier.fillMaxWidth(),
-    ) {
-        Row(
-            verticalAlignment = Alignment.CenterVertically,
-            modifier = Modifier.padding(horizontal = 16.dp, vertical = 14.dp),
-        ) {
-            if (icon != null) {
-                Icon(
-                    imageVector = icon,
-                    contentDescription = null,
-                    tint = when {
-                        iconTint.isSpecified -> iconTint
-                        selected -> MaterialTheme.colorScheme.onSecondaryContainer
-                        else -> MaterialTheme.colorScheme.onSurfaceVariant
-                    },
-                    modifier = Modifier.size(20.dp),
-                )
-                Spacer(Modifier.width(12.dp))
-            }
-            Column {
-                Text(
-                    text = label,
-                    style = MaterialTheme.typography.titleMedium,
-                    color = if (labelColor.isSpecified) labelColor else contentColor,
-                )
-                if (supportingText != null) {
-                    Text(
-                        text = supportingText,
-                        style = MaterialTheme.typography.bodySmall,
-                        color = if (selected) {
-                            MaterialTheme.colorScheme.onSecondaryContainer.copy(alpha = 0.8f)
-                        } else {
-                            MaterialTheme.colorScheme.onSurfaceVariant
-                        },
-                    )
-                }
-            }
-        }
-    }
-}

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/PastEvents.kt

@@ -0,0 +1,16 @@
+package de.jeanlucmakiola.calendula.ui.common
+
+import androidx.compose.runtime.compositionLocalOf
+import kotlin.time.Instant
+
+/**
+ * The cut-off instant before which a calendar event counts as "completed" and is
+ * drawn dimmed in the month/week grids — i.e. the current wall-clock minute when
+ * the "dim completed events" setting is on, or `null` when it is off (nothing
+ * dims). Provided per grid screen so only the event chips that read it recompose
+ * as the minute ticks, mirroring [LocalShowHourLines] / [LocalUse24HourFormat].
+ */
+val LocalDimCutoff = compositionLocalOf<Instant?> { null }
+
+/** Opacity applied to a completed/past event chip when it is dimmed. */
+const val EventDimAlpha = 0.4f

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/Picker.kt

@@ -1,193 +1,171 @@
 package de.jeanlucmakiola.calendula.ui.common
 
 import androidx.compose.animation.AnimatedVisibility
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.ColumnScope
-import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Check
-import androidx.compose.material3.FilledTonalButton
+import androidx.compose.material3.Checkbox
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.SegmentedButton
-import androidx.compose.material3.SegmentedButtonDefaults
-import androidx.compose.material3.SingleChoiceSegmentedButtonRow
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
-import android.view.WindowManager
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.SideEffect
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
-import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalView
+import androidx.compose.ui.res.pluralStringResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
-import androidx.compose.ui.window.Dialog
-import androidx.compose.ui.window.DialogProperties
-import androidx.compose.ui.window.DialogWindowProvider
 import de.jeanlucmakiola.calendula.R
-import de.jeanlucmakiola.calendula.data.prefs.CalendarReminderOverride
+import de.jeanlucmakiola.floret.components.CustomAmountEditor
+import de.jeanlucmakiola.floret.components.FullScreenPicker
+import de.jeanlucmakiola.floret.components.GroupedRow
+import de.jeanlucmakiola.floret.components.Position
+import de.jeanlucmakiola.floret.components.positionOf
+import de.jeanlucmakiola.floret.identity.collapseExit
+import de.jeanlucmakiola.floret.identity.expandEnter
+import de.jeanlucmakiola.floret.reminders.ReminderOverride
+import de.jeanlucmakiola.floret.reminders.ReminderUnit
+import de.jeanlucmakiola.floret.reminders.reminderOverrideForMinutes
+import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
 
 /**
- * Shared full-screen scaffold for selection pickers: a full-bleed [Dialog] that
- * reuses the app's [CollapsingScaffold] (collapsing title + back button), so a
- * picker is visually identical to a Settings sub-page and uses the full width.
- * [content] places the connected grouped rows; selecting one calls [onDismiss].
- */
-@Composable
-fun FullScreenPicker(
-    title: String,
-    onDismiss: () -> Unit,
-    content: @Composable ColumnScope.() -> Unit,
-) {
-    Dialog(
-        onDismissRequest = onDismiss,
-        properties = DialogProperties(
-            usePlatformDefaultWidth = false,
-            decorFitsSystemWindows = false,
-        ),
-    ) {
-        // The dialog window pans by default when the keyboard opens, which —
-        // combined with the content's own imePadding — leaves a fixed black gap
-        // above the keyboard. Switch it to ADJUST_NOTHING so the window stays
-        // full-screen and imePadding alone lifts the focused field.
-        val view = LocalView.current
-        SideEffect {
-            (view.parent as? DialogWindowProvider)?.window
-                ?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING)
-        }
-        CollapsingScaffold(title = title, onBack = onDismiss, content = content)
-    }
-}
-
-/**
- * General single-select picker, full-screen: each option is a connected grouped
- * row and the current one carries a check. Drop-in for the former dialog
- * (theme, week start, language, …).
- */
-@Composable
-fun <T> OptionPicker(
-    title: String,
-    options: List<T>,
-    selected: T,
-    label: @Composable (T) -> String,
-    onSelect: (T) -> Unit,
-    onDismiss: () -> Unit,
-) {
-    FullScreenPicker(title = title, onDismiss = onDismiss) {
-        options.forEachIndexed { index, option ->
-            val isSelected = option == selected
-            GroupedRow(
-                title = label(option),
-                position = positionOf(index, options.size),
-                selected = isSelected,
-                trailing = if (isSelected) {
-                    { SelectedCheck() }
-                } else {
-                    null
-                },
-                onClick = {
-                    onSelect(option)
-                    onDismiss()
-                },
-            )
-        }
-    }
-}
-
-/**
- * Reminder-default picker, full-screen: the grouped list (with an optional "Use
- * default reminder" row and a "None" row), the [presets] as lead-time rows, and
- * a "Custom" row that expands an inline number field plus a segmented unit
- * selector. Returns the choice as a [CalendarReminderOverride].
+ * Reminder-default picker, full-screen and **multi-select**: each [presets]
+ * lead time (plus any chosen custom value) is a checkbox row that toggles
+ * independently, so a default can carry several reminders ("1 week before" *and*
+ * "on the day"). Two exclusive checkmark rows sit above the list: an explicit
+ * "No reminder" (both pickers, so the empty state stays visible and reachable)
+ * and, for a per-calendar picker ([allowInherit]), "Use default reminder", which
+ * defers to the global default. Clearing the last checked time reverts to "Use
+ * default" on a per-calendar picker (so an accidental toggle-undo can't silently
+ * wipe the calendar's default) and to explicit [ReminderOverride.None]
+ * on the global default (where empty legitimately means no reminder). A "Custom"
+ * row expands an inline number field plus a unit selector to add an arbitrary
+ * lead time to the set. Changes apply live via [onSelect]; the user leaves via
+ * back.
  */
 @Composable
 fun ReminderDefaultPicker(
     title: String,
     presets: List<Int>,
-    selected: CalendarReminderOverride,
+    selected: ReminderOverride,
     allowInherit: Boolean,
-    onSelect: (CalendarReminderOverride) -> Unit,
+    onSelect: (ReminderOverride) -> Unit,
     onDismiss: () -> Unit,
 ) {
-    val selectedMinutes = (selected as? CalendarReminderOverride.Minutes)?.minutes
-    val customSelected = selectedMinutes != null && selectedMinutes !in presets
-    val seed = decomposeReminder(selectedMinutes?.takeIf { customSelected })
+    // Optimistic local state: once the user edits, the chosen override is
+    // authoritative while the picker is open, so quick successive toggles compose
+    // on each other instead of racing the round-trip through the settings flow
+    // (which would drop a toggle made before the previous write echoes back).
+    var current by remember { mutableStateOf(selected) }
+    // Whether the user has toggled anything yet. Until then, [current] keeps
+    // mirroring [selected]: a picker that first composed against the settings
+    // flow's initialValue (empty — reachable after process-death restore straight
+    // onto the Notifications page, before the CalendarProvider-gated combine
+    // resolves) then adopts the real stored default instead of persisting empty
+    // on the first tap. After the first edit, local state is authoritative.
+    var userEdited by remember { mutableStateOf(false) }
+    LaunchedEffect(selected) {
+        if (!userEdited) current = selected
+    }
+    val inherits = current is ReminderOverride.Inherit
+    val isNone = current is ReminderOverride.None
+    val selectedMinutes = (current as? ReminderOverride.Minutes)?.minutes.orEmpty()
+    // Custom (non-preset) lead times seen this session, so unchecking one keeps
+    // its row (unchecked) until the picker closes instead of vanishing mid-tap,
+    // which would strand a hand-entered value with no way to re-check it.
+    val seenCustom = remember { mutableSetOf<Int>() }
+    seenCustom += selectedMinutes.filter { it !in presets }
+    // Presets plus every custom value seen this session, each as its own row.
+    val rows = presets + seenCustom.sorted()
 
     var customExpanded by rememberSaveable { mutableStateOf(false) }
-    var amountText by rememberSaveable { mutableStateOf(seed.first) }
-    var unit by rememberSaveable { mutableStateOf(seed.second) }
+    var amountText by rememberSaveable { mutableStateOf("") }
+    var unit by rememberSaveable { mutableStateOf(ReminderUnit.Minutes) }
 
-    val options = buildList {
-        if (allowInherit) add(CalendarReminderOverride.Inherit)
-        add(CalendarReminderOverride.None)
-        presets.forEach { add(CalendarReminderOverride.Minutes(it)) }
+    fun apply(override: ReminderOverride) {
+        userEdited = true
+        current = override
+        onSelect(override)
     }
-    val rowCount = options.size + 1 // + the custom row
+    fun emit(minutes: List<Int>) = apply(reminderOverrideForMinutes(minutes, allowInherit))
+    fun toggle(minute: Int) =
+        emit(if (minute in selectedMinutes) selectedMinutes - minute else selectedMinutes + minute)
 
     FullScreenPicker(title = title, onDismiss = onDismiss) {
-        options.forEachIndexed { index, option ->
-            val isSelected = option == selected
+        // Exclusive choices in their own group above the multi-select list, since
+        // each is mutually exclusive with picking specific times: "use default"
+        // (per-calendar only) and an explicit "no reminder" (both pickers, so the
+        // empty state stays visible and deliberately reachable).
+        if (allowInherit) {
             GroupedRow(
-                title = reminderOverrideLabel(option),
-                position = positionOf(index, rowCount),
-                selected = isSelected,
-                trailing = if (isSelected) {
+                title = stringResource(R.string.reminder_use_default),
+                position = Position.Top,
+                selected = inherits,
+                trailing = if (inherits) {
                     { SelectedCheck() }
                 } else {
                     null
                 },
-                onClick = {
-                    onSelect(option)
-                    onDismiss()
+                onClick = { apply(ReminderOverride.Inherit) },
+            )
+        }
+        GroupedRow(
+            title = stringResource(R.string.reminder_none),
+            position = if (allowInherit) Position.Bottom else Position.Alone,
+            selected = isNone,
+            trailing = if (isNone) {
+                { SelectedCheck() }
+            } else {
+                null
             },
+            onClick = { apply(ReminderOverride.None) },
+        )
+        Spacer(Modifier.height(24.dp))
+        val rowCount = rows.size + 1 // + the custom row
+        rows.forEachIndexed { index, minute ->
+            val checked = minute in selectedMinutes
+            GroupedRow(
+                title = reminderLeadTimeLabel(minute),
+                position = positionOf(index, rowCount),
+                selected = checked,
+                trailing = { Checkbox(checked = checked, onCheckedChange = { toggle(minute) }) },
+                onClick = { toggle(minute) },
             )
         }
         // When expanded, the Custom row connects downward into the editor card
         // so the two read as one grouped container (the per-calendar pattern).
         GroupedRow(
-            title = if (customSelected) {
-                stringResource(
-                    R.string.reminder_custom_with_value,
-                    reminderLeadTimeLabel(selectedMinutes!!),
-                )
-            } else {
-                stringResource(R.string.event_edit_reminder_custom)
-            },
-            position = if (customExpanded) Position.Top else positionOf(options.size, rowCount),
-            selected = customSelected,
-            trailing = if (customSelected) {
-                { SelectedCheck() }
-            } else {
-                null
-            },
+            title = stringResource(R.string.event_edit_reminder_custom),
+            position = if (customExpanded) Position.Top else positionOf(rows.size, rowCount),
             onClick = { customExpanded = !customExpanded },
         )
-        AnimatedVisibility(visible = customExpanded) {
+        AnimatedVisibility(
+            visible = customExpanded,
+            enter = expandEnter(),
+            exit = collapseExit(),
+        ) {
             CustomReminderEditor(
                 amountText = amountText,
                 onAmountChange = { amountText = it },
                 unit = unit,
                 onUnitChange = { unit = it },
                 onConfirm = { minutes ->
-                    onSelect(CalendarReminderOverride.Minutes(minutes))
-                    onDismiss()
+                    emit(selectedMinutes + minutes)
+                    amountText = ""
+                    customExpanded = false
                 },
             )
         }
     }
 }
 
+
 /**
  * The expanded "Custom" lead-time editor: a tonal card connected to the Custom
  * row above it (matching the grouped-row system, so the two read as one
@@ -204,56 +182,29 @@ private fun CustomReminderEditor(
     onConfirm: (Int) -> Unit,
 ) {
     val amount = amountText.toIntOrNull()?.takeIf { it in 1..999 }
-    Surface(
-        color = MaterialTheme.colorScheme.surfaceContainerHigh,
-        // A Position.Bottom shape: tight top corners meeting the row, full bottom.
-        shape = RoundedCornerShape(topStart = 6.dp, topEnd = 6.dp, bottomStart = 22.dp, bottomEnd = 22.dp),
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(horizontal = 16.dp),
-    ) {
-        Column(
-            modifier = Modifier.padding(16.dp),
-            verticalArrangement = Arrangement.spacedBy(16.dp),
-        ) {
-            // Unit toggle first so it stays visible above the keyboard once the
-            // amount field (the bottom row) is focused and scrolled into view.
-            SingleChoiceSegmentedButtonRow(modifier = Modifier.fillMaxWidth()) {
-                ReminderUnit.entries.forEachIndexed { index, entry ->
-                    SegmentedButton(
-                        selected = unit == entry,
-                        onClick = { onUnitChange(entry) },
-                        shape = SegmentedButtonDefaults.itemShape(index, ReminderUnit.entries.size),
-                        label = { Text(stringResource(reminderUnitLabel(entry))) },
-                    )
-                }
-            }
-            // Amount, a live preview of the lead time it resolves to, and Set —
-            // all on one row, sitting just above the keyboard.
-            Row(verticalAlignment = Alignment.CenterVertically) {
-                DialogAmountField(
-                    value = amountText,
-                    onValueChange = onAmountChange,
-                    placeholder = "10",
-                )
-                Spacer(Modifier.width(16.dp))
-                Text(
-                    text = amount?.let { reminderLeadTimeLabel(it * unit.minutesFactor) }
+    CustomAmountEditor(
+        amountText = amountText,
+        onAmountChange = onAmountChange,
+        unitLabels = ReminderUnit.entries.map { stringResource(reminderUnitLabel(it)) },
+        selectedUnit = unit.ordinal,
+        onUnitChange = { onUnitChange(ReminderUnit.entries[it]) },
+        preview = amount?.let { reminderLeadTimeLabel(it * unit.minutesFactor) }
             ?: stringResource(R.string.reminder_custom_amount),
-                    style = MaterialTheme.typography.bodyLarge,
-                    color = MaterialTheme.colorScheme.onSurfaceVariant,
-                    modifier = Modifier.weight(1f),
+        setLabel = stringResource(R.string.reminder_custom_set),
+        confirmEnabled = amount != null,
+        onConfirm = { amount?.let { onConfirm(it * unit.minutesFactor) } },
     )
-                Spacer(Modifier.width(16.dp))
-                FilledTonalButton(
-                    onClick = { amount?.let { onConfirm(it * unit.minutesFactor) } },
-                    enabled = amount != null,
-                ) {
-                    Text(stringResource(R.string.reminder_custom_set))
-                }
-            }
-        }
 }
+
+/** A short explanatory paragraph shown under a picker's title, above the rows. */
+@Composable
+private fun PickerDescription(text: String) {
+    Text(
+        text = text,
+        style = MaterialTheme.typography.bodyMedium,
+        color = MaterialTheme.colorScheme.onSurfaceVariant,
+        modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp),
+    )
 }
 
 @Composable
@@ -265,18 +216,241 @@ private fun SelectedCheck() {
     )
 }
 
+/**
+ * Agenda-range picker, full-screen. Two grouped lists — the calendar-aligned
+ * options (today / this week / this month) and the rolling windows (next 7 / 30
+ * days), with a "Custom" row that expands an inline day-count editor (1–365).
+ * Mirrors [ReminderDefaultPicker]'s custom-expand pattern.
+ */
 @Composable
-private fun reminderOverrideLabel(override: CalendarReminderOverride): String = when (override) {
-    CalendarReminderOverride.Inherit -> stringResource(R.string.reminder_use_default)
-    CalendarReminderOverride.None -> stringResource(R.string.reminder_none)
-    is CalendarReminderOverride.Minutes -> reminderLeadTimeLabel(override.minutes)
+fun AgendaRangePicker(
+    title: String,
+    description: String,
+    selected: AgendaRange,
+    onSelect: (AgendaRange) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    val calendarAligned = listOf(AgendaRange.Day, AgendaRange.ThisWeek, AgendaRange.ThisMonth)
+    val rolling = listOf(AgendaRange.Week, AgendaRange.Month)
+    val rollingRowCount = rolling.size + 1 // + the custom row
+    val customSelected = selected is AgendaRange.Custom
+
+    var customExpanded by rememberSaveable { mutableStateOf(false) }
+    var amountText by rememberSaveable {
+        mutableStateOf((selected as? AgendaRange.Custom)?.days?.toString() ?: "")
     }
 
-/** Seed the custom editor: the largest exact unit for [minutes] (null → empty). */
-private fun decomposeReminder(minutes: Int?): Pair<String, ReminderUnit> = when {
-    minutes == null -> "" to ReminderUnit.Minutes
-    minutes % 10_080 == 0 -> (minutes / 10_080).toString() to ReminderUnit.Weeks
-    minutes % 1_440 == 0 -> (minutes / 1_440).toString() to ReminderUnit.Days
-    minutes % 60 == 0 -> (minutes / 60).toString() to ReminderUnit.Hours
-    else -> minutes.toString() to ReminderUnit.Minutes
+    val rangeRow: @Composable (AgendaRange, Position) -> Unit = { option, position ->
+        val isSelected = option == selected
+        GroupedRow(
+            title = agendaRangeLabel(option),
+            position = position,
+            selected = isSelected,
+            trailing = if (isSelected) {
+                { SelectedCheck() }
+            } else {
+                null
+            },
+            onClick = {
+                onSelect(option)
+                onDismiss()
+            },
+        )
     }
+
+    FullScreenPicker(title = title, onDismiss = onDismiss) {
+        PickerDescription(description)
+
+        // Calendar-aligned windows.
+        calendarAligned.forEachIndexed { index, option ->
+            rangeRow(option, positionOf(index, calendarAligned.size))
+        }
+
+        Spacer(Modifier.height(12.dp))
+
+        // Rolling windows + custom.
+        rolling.forEachIndexed { index, option ->
+            rangeRow(option, positionOf(index, rollingRowCount))
+        }
+        GroupedRow(
+            title = if (customSelected) {
+                agendaRangeLabel(selected)
+            } else {
+                stringResource(R.string.agenda_range_custom)
+            },
+            position = if (customExpanded) Position.Top else positionOf(rolling.size, rollingRowCount),
+            selected = customSelected,
+            trailing = if (customSelected) {
+                { SelectedCheck() }
+            } else {
+                null
+            },
+            onClick = { customExpanded = !customExpanded },
+        )
+        AnimatedVisibility(
+            visible = customExpanded,
+            enter = expandEnter(),
+            exit = collapseExit(),
+        ) {
+            CustomDaysEditor(
+                amountText = amountText,
+                onAmountChange = { amountText = it },
+                onConfirm = { days ->
+                    onSelect(AgendaRange.Custom(days))
+                    onDismiss()
+                },
+            )
+        }
+    }
+}
+
+/** The expanded "Custom" day-count editor: an amount field (1–365) and Set. */
+@Composable
+private fun CustomDaysEditor(
+    amountText: String,
+    onAmountChange: (String) -> Unit,
+    onConfirm: (Int) -> Unit,
+) {
+    val days = amountText.toIntOrNull()
+        ?.takeIf { it in AgendaRange.MIN_CUSTOM_DAYS..AgendaRange.MAX_CUSTOM_DAYS }
+    CustomAmountEditor(
+        amountText = amountText,
+        onAmountChange = onAmountChange,
+        placeholder = "30",
+        preview = days?.let { pluralStringResource(R.plurals.agenda_range_days, it, it) }
+            ?: stringResource(R.string.agenda_range_custom_hint),
+        setLabel = stringResource(R.string.reminder_custom_set),
+        confirmEnabled = days != null,
+        onConfirm = { days?.let(onConfirm) },
+    )
+}
+
+/**
+ * Snooze-duration picker, full-screen and **single-select**: the [presets]
+ * (whole-minute delays) each sit as a checkmark row, with a "Custom" row that
+ * expands an inline amount field plus a Minutes/Hours unit toggle to enter an
+ * arbitrary delay. Mirrors [AgendaRangePicker]'s custom-expand pattern; picking
+ * a preset or confirming a custom value applies via [onSelect] and closes.
+ * [label] renders a delay in minutes as a duration ("10 minutes", "1 hour") and
+ * is reused for both the rows and the custom preview.
+ */
+@Composable
+fun SnoozeDurationPicker(
+    title: String,
+    presets: List<Int>,
+    selected: Int,
+    label: @Composable (Int) -> String,
+    onSelect: (Int) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    val customSelected = selected !in presets
+    val rowCount = presets.size + 1 // + the custom row
+
+    var customExpanded by rememberSaveable { mutableStateOf(false) }
+    var amountText by rememberSaveable {
+        mutableStateOf(if (customSelected) snoozeCustomAmount(selected).toString() else "")
+    }
+    var unit by rememberSaveable {
+        mutableStateOf(if (customSelected) snoozeCustomUnit(selected) else ReminderUnit.Minutes)
+    }
+
+    FullScreenPicker(title = title, onDismiss = onDismiss, predictiveBack = true) {
+        presets.forEachIndexed { index, minute ->
+            val isSelected = minute == selected
+            GroupedRow(
+                title = label(minute),
+                position = positionOf(index, rowCount),
+                selected = isSelected,
+                trailing = if (isSelected) {
+                    { SelectedCheck() }
+                } else {
+                    null
+                },
+                onClick = {
+                    onSelect(minute)
+                    onDismiss()
+                },
+            )
+        }
+        // The Custom row connects downward into the editor card when expanded, so
+        // the two read as one grouped container (the shared custom-expand pattern).
+        GroupedRow(
+            title = if (customSelected) label(selected) else stringResource(R.string.event_edit_reminder_custom),
+            position = if (customExpanded) Position.Top else positionOf(presets.size, rowCount),
+            selected = customSelected,
+            trailing = if (customSelected) {
+                { SelectedCheck() }
+            } else {
+                null
+            },
+            onClick = { customExpanded = !customExpanded },
+        )
+        AnimatedVisibility(
+            visible = customExpanded,
+            enter = expandEnter(),
+            exit = collapseExit(),
+        ) {
+            CustomSnoozeEditor(
+                amountText = amountText,
+                onAmountChange = { amountText = it },
+                unit = unit,
+                onUnitChange = { unit = it },
+                label = label,
+                onConfirm = { minutes ->
+                    onSelect(minutes)
+                    onDismiss()
+                },
+            )
+        }
+    }
+}
+
+/** Whole hours if the delay divides evenly, else minutes. */
+private fun snoozeCustomUnit(minutes: Int): ReminderUnit =
+    if (minutes % ReminderUnit.Hours.minutesFactor == 0) ReminderUnit.Hours else ReminderUnit.Minutes
+
+private fun snoozeCustomAmount(minutes: Int): Int =
+    if (minutes % ReminderUnit.Hours.minutesFactor == 0) minutes / ReminderUnit.Hours.minutesFactor else minutes
+
+/**
+ * The expanded "Custom" snooze editor: a tonal card connected to the Custom row
+ * above it. A Minutes/Hours unit toggle, an amount field with a live preview of
+ * the delay it resolves to, and a tonal confirm enabled only for a valid 1–999
+ * amount. [onConfirm] receives the final delay in minutes.
+ */
+@Composable
+private fun CustomSnoozeEditor(
+    amountText: String,
+    onAmountChange: (String) -> Unit,
+    unit: ReminderUnit,
+    onUnitChange: (ReminderUnit) -> Unit,
+    label: @Composable (Int) -> String,
+    onConfirm: (Int) -> Unit,
+) {
+    val units = remember { listOf(ReminderUnit.Minutes, ReminderUnit.Hours) }
+    val amount = amountText.toIntOrNull()?.takeIf { it in 1..999 }
+    CustomAmountEditor(
+        amountText = amountText,
+        onAmountChange = onAmountChange,
+        unitLabels = units.map { stringResource(reminderUnitLabel(it)) },
+        selectedUnit = units.indexOf(unit).coerceAtLeast(0),
+        onUnitChange = { onUnitChange(units[it]) },
+        preview = amount?.let { label(it * unit.minutesFactor) }
+            ?: stringResource(R.string.reminder_custom_amount),
+        setLabel = stringResource(R.string.reminder_custom_set),
+        confirmEnabled = amount != null,
+        onConfirm = { amount?.let { onConfirm(it * unit.minutesFactor) } },
+    )
+}
+
+/** Human label for an [AgendaRange] (used by the picker rows and settings summary). */
+@Composable
+fun agendaRangeLabel(range: AgendaRange): String = when (range) {
+    AgendaRange.Day -> stringResource(R.string.agenda_range_day)
+    AgendaRange.ThisWeek -> stringResource(R.string.agenda_range_this_week)
+    AgendaRange.ThisMonth -> stringResource(R.string.agenda_range_this_month)
+    AgendaRange.Week -> stringResource(R.string.agenda_range_week)
+    AgendaRange.Month -> stringResource(R.string.agenda_range_month)
+    is AgendaRange.Custom -> pluralStringResource(R.plurals.agenda_range_days, range.days, range.days)
+}
+

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/ReminderFormatting.kt

@@ -5,18 +5,11 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.res.pluralStringResource
 import androidx.compose.ui.res.stringResource
 import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.floret.reminders.ReminderUnit
 
 /** Common reminder lead times offered as quick picks in the form and settings. */
 val REMINDER_PRESETS = listOf(0, 10, 30, 60, 1_440)
 
-/** The unit of a custom reminder lead time; [minutesFactor] converts to minutes. */
-enum class ReminderUnit(val minutesFactor: Int) {
-    Minutes(1),
-    Hours(60),
-    Days(1_440),
-    Weeks(10_080),
-}
-
 @StringRes
 fun reminderUnitLabel(unit: ReminderUnit): Int = when (unit) {
     ReminderUnit.Minutes -> R.string.reminder_unit_minutes

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/TimeFormat.kt

@@ -0,0 +1,57 @@
+package de.jeanlucmakiola.calendula.ui.common
+
+import androidx.compose.runtime.staticCompositionLocalOf
+import java.time.LocalTime
+import java.time.format.DateTimeFormatter
+import java.util.Locale
+
+/**
+ * The resolved clock convention for the whole UI: `true` = 24-hour ("14:00"),
+ * `false` = 12-hour ("2:00 PM"). Provided once at the app root from the
+ * `TimeFormatPref` preference resolved against the device's 24-hour system
+ * setting, so every time label reads it without per-screen plumbing. Defaults
+ * to 24-hour for previews and any composition that forgets to provide it.
+ */
+val LocalUse24HourFormat = staticCompositionLocalOf { true }
+
+private const val PATTERN_24 = "HH:mm"
+private const val PATTERN_12 = "h:mm a"
+private const val HOUR_PATTERN_12 = "h a"
+
+/** A time-of-day [DateTimeFormatter] for the resolved convention and [locale]. */
+fun timeOfDayFormatter(is24Hour: Boolean, locale: Locale): DateTimeFormatter =
+    DateTimeFormatter.ofPattern(if (is24Hour) PATTERN_24 else PATTERN_12, locale)
+
+/**
+ * Format a wall-clock time (hour 0..23, minute 0..59) honouring the resolved
+ * [is24Hour] convention and [locale]: 24h → "14:00", 12h → "2:00 PM". Pure, so
+ * it can be unit-tested and used off the main thread (widget, notifications).
+ */
+fun formatTimeOfDay(hour: Int, minute: Int, is24Hour: Boolean, locale: Locale): String =
+    LocalTime.of(hour.coerceIn(0, 23), minute.coerceIn(0, 59))
+        .format(timeOfDayFormatter(is24Hour, locale))
+
+/**
+ * Format minutes-from-midnight (0..1440) as a time label. The end-of-day value
+ * 1440 renders as "24:00" in 24h (its established reading) and as midnight
+ * ("12:00 AM") in 12h, which has no 24:00 equivalent.
+ */
+fun formatMinuteOfDay(minutes: Int, is24Hour: Boolean, locale: Locale): String = when {
+    minutes >= MINUTES_PER_DAY && is24Hour -> "24:00"
+    minutes >= MINUTES_PER_DAY -> formatTimeOfDay(0, 0, is24Hour = false, locale)
+    else -> formatTimeOfDay(minutes / 60, minutes % 60, is24Hour, locale)
+}
+
+/**
+ * The compact hour-only label for a timeline gutter: 24h → "13" (zero-padded,
+ * the prior look); 12h → "1 PM".
+ */
+fun formatHourLabel(hour: Int, is24Hour: Boolean, locale: Locale): String =
+    if (is24Hour) {
+        "%02d".format(hour)
+    } else {
+        LocalTime.of(hour.coerceIn(0, 23), 0)
+            .format(DateTimeFormatter.ofPattern(HOUR_PATTERN_12, locale))
+    }
+
+private const val MINUTES_PER_DAY = 1_440

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/TimePickerAlert.kt

@@ -4,14 +4,9 @@ import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
-import android.content.Context
-import android.content.res.Resources
-import android.provider.Settings
-import android.text.format.DateFormat
 import androidx.compose.material3.TimePicker
 import androidx.compose.material3.rememberTimePickerState
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import de.jeanlucmakiola.calendula.R
 import kotlinx.datetime.LocalTime
@@ -27,10 +22,13 @@ fun TimePickerAlert(
     onConfirm: (LocalTime) -> Unit,
     onDismiss: () -> Unit,
 ) {
+    // Honour the app's own time-format preference (the value every time label
+    // reads), not the system/locale clock — otherwise an explicit 24h setting
+    // still showed an AM/PM dial (issue #27).
     val state = rememberTimePickerState(
         initialHour = initial.hour,
         initialMinute = initial.minute,
-        is24Hour = deviceUses24HourClock(LocalContext.current),
+        is24Hour = LocalUse24HourFormat.current,
     )
     AlertDialog(
         onDismissRequest = onDismiss,
@@ -45,24 +43,3 @@ fun TimePickerAlert(
         text = { TimePicker(state = state) },
     )
 }
-
-/**
- * Whether the clock should read 24-hour, matching the rest of the device.
- *
- * [DateFormat.is24HourFormat] resolves a "locale default" system setting against
- * the *app's* context locale — and this app applies a per-app language
- * (AppCompatDelegate), so an English UI on a German-region phone would wrongly
- * read 12-hour while the system clock shows 24-hour. So we honour an explicit
- * system 12/24 override, and otherwise fall back to the **device** locale
- * (Resources.getSystem), not the app's.
- */
-private fun deviceUses24HourClock(context: Context): Boolean =
-    when (Settings.System.getString(context.contentResolver, Settings.System.TIME_12_24)) {
-        "24" -> true
-        "12" -> false
-        // 'a' is the AM/PM marker; a best-fit pattern without it is 24-hour.
-        else -> {
-            val deviceLocale = Resources.getSystem().configuration.locales[0]
-            !DateFormat.getBestDateTimePattern(deviceLocale, "jm").contains('a')
-        }
-    }

app/src/main/java/de/jeanlucmakiola/calendula/ui/crash/CrashReportActivity.kt

@@ -8,8 +8,10 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.ui.Modifier
-import de.jeanlucmakiola.calendula.data.crash.CrashReporter
 import de.jeanlucmakiola.calendula.ui.theme.CalendulaTheme
+import de.jeanlucmakiola.floret.crash.CrashReportDialog
+import de.jeanlucmakiola.floret.crash.CrashReporter
+import de.jeanlucmakiola.floret.crash.submitCrashReport
 
 /**
  * A deliberately minimal, standalone surface for a captured crash report.

app/src/main/java/de/jeanlucmakiola/calendula/ui/crash/CrashReportDialog.kt

@@ -1,75 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.crash
-
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.heightIn
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.rememberScrollState
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.foundation.verticalScroll
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.BugReport
-import androidx.compose.material3.AlertDialog
-import androidx.compose.material3.Icon
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
-import androidx.compose.material3.TextButton
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.font.FontFamily
-import androidx.compose.ui.unit.dp
-import de.jeanlucmakiola.calendula.R
-
-/**
- * Asks the user to send a captured crash report as an issue. The full report is
- * shown verbatim in a scrollable panel — the user sees exactly what will leave
- * the device before choosing to share it (the privacy backstop). [onSend] hands
- * off to [submitCrashReport]; [onDismiss] declines.
- */
-@Composable
-fun CrashReportDialog(
-    report: String,
-    onSend: () -> Unit,
-    onDismiss: () -> Unit,
-) {
-    AlertDialog(
-        onDismissRequest = onDismiss,
-        icon = { Icon(Icons.Default.BugReport, contentDescription = null) },
-        title = { Text(stringResource(R.string.crash_dialog_title)) },
-        text = {
-            Column {
-                Text(
-                    text = stringResource(R.string.crash_dialog_message),
-                    style = MaterialTheme.typography.bodyMedium,
-                )
-                Spacer(Modifier.height(12.dp))
-                Surface(
-                    color = MaterialTheme.colorScheme.surfaceContainerHighest,
-                    shape = RoundedCornerShape(12.dp),
-                    modifier = Modifier.fillMaxWidth(),
-                ) {
-                    Text(
-                        text = report,
-                        style = MaterialTheme.typography.bodySmall,
-                        fontFamily = FontFamily.Monospace,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                        modifier = Modifier
-                            .heightIn(max = 220.dp)
-                            .verticalScroll(rememberScrollState())
-                            .padding(12.dp),
-                    )
-                }
-            }
-        },
-        confirmButton = {
-            TextButton(onClick = onSend) { Text(stringResource(R.string.crash_dialog_report)) }
-        },
-        dismissButton = {
-            TextButton(onClick = onDismiss) { Text(stringResource(R.string.crash_dialog_dismiss)) }
-        },
-    )
-}

app/src/main/java/de/jeanlucmakiola/calendula/ui/crash/CrashReportSubmit.kt

@@ -1,61 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.crash
-
-import android.content.ClipData
-import android.content.ClipboardManager
-import android.content.Context
-import android.content.Intent
-import android.widget.Toast
-import androidx.core.net.toUri
-import de.jeanlucmakiola.calendula.R
-
-/**
- * Hand the captured crash report off to the user's chosen channel: the report
- * is copied to the clipboard (the reliable path for a full stack trace) and the
- * project's Gitea "new issue" page is opened with the body prefilled. Nothing is
- * sent automatically — the app has no network access; the user reviews and
- * submits the issue themselves.
- */
-fun submitCrashReport(context: Context, report: String) {
-    copyReportToClipboard(context, report)
-    val opened = runCatching {
-        context.startActivity(Intent(Intent.ACTION_VIEW, buildIssueUri(context, report)))
-    }.isSuccess
-    val message = if (opened) R.string.crash_report_copied else R.string.crash_report_open_failed
-    Toast.makeText(context, message, Toast.LENGTH_LONG).show()
-}
-
-/** Open the issue tracker's template chooser for a manual (non-crash) report. */
-fun openIssueTracker(context: Context) {
-    val uri = context.getString(R.string.report_issue_choose_url).toUri()
-    runCatching { context.startActivity(Intent(Intent.ACTION_VIEW, uri)) }
-}
-
-private fun copyReportToClipboard(context: Context, report: String) {
-    val clipboard = context.getSystemService(Context.CLIPBOARD_SERVICE) as? ClipboardManager ?: return
-    val label = context.getString(R.string.crash_report_clip_label)
-    clipboard.setPrimaryClip(ClipData.newPlainText(label, report))
-}
-
-/**
- * The Gitea `issues/new` URL with `title` and `body` prefilled. A full report
- * can blow past URL-length limits, so an over-long one is left out of the link
- * (with a "paste from clipboard" placeholder) — the clipboard copy is the
- * source of truth in that case.
- */
-private fun buildIssueUri(context: Context, report: String) =
-    context.getString(R.string.report_issue_url).toUri().buildUpon()
-        .appendQueryParameter("title", context.getString(R.string.crash_report_issue_title))
-        .appendQueryParameter("body", buildIssueBody(context, report))
-        .build()
-
-private fun buildIssueBody(context: Context, report: String): String {
-    val block = if (report.length > MAX_URL_REPORT_CHARS) {
-        context.getString(R.string.crash_report_body_paste)
-    } else {
-        "```\n$report\n```"
-    }
-    return context.getString(R.string.crash_report_body_template, block)
-}
-
-/** Keep the prefilled body comfortably under common URL-length ceilings. */
-private const val MAX_URL_REPORT_CHARS = 6_000

app/src/main/java/de/jeanlucmakiola/calendula/ui/day/DayScreen.kt

@@ -26,6 +26,7 @@ import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Menu
+import androidx.compose.material.icons.filled.Search
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.DrawerValue
@@ -71,12 +72,21 @@ import de.jeanlucmakiola.calendula.ui.common.CalendarDrawer
 import de.jeanlucmakiola.calendula.ui.common.CalendarFabColumn
 import de.jeanlucmakiola.calendula.ui.common.CalendarFailure
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
+import de.jeanlucmakiola.calendula.ui.common.IMPLEMENTED_VIEWS
+import de.jeanlucmakiola.calendula.ui.common.NowLine
 import de.jeanlucmakiola.calendula.ui.common.ViewSwitcherPill
 import de.jeanlucmakiola.calendula.ui.common.calendarSlideTransition
+import de.jeanlucmakiola.calendula.ui.common.rememberCalendarFadeSpec
+import de.jeanlucmakiola.floret.identity.rememberReduceMotion
 import de.jeanlucmakiola.calendula.ui.common.next
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.floret.components.pastelize
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarSlideSpec
-import de.jeanlucmakiola.calendula.ui.week.MINUTES_PER_DAY
+import de.jeanlucmakiola.calendula.ui.common.currentLocale
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
+import de.jeanlucmakiola.calendula.ui.common.LocalShowHourLines
+import de.jeanlucmakiola.calendula.ui.common.formatHourLabel
+import de.jeanlucmakiola.calendula.ui.common.formatMinuteOfDay
+import de.jeanlucmakiola.calendula.ui.common.hourSeparatorLines
 import de.jeanlucmakiola.calendula.ui.week.TimedBlock
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
@@ -105,7 +115,10 @@ fun DayScreen(
     onSelectView: (CalendarView) -> Unit,
     onEventClick: (EventInstance) -> Unit,
     onOpenSettings: () -> Unit,
+    onOpenSearch: () -> Unit,
     onCreateEvent: (LocalDate, Int?) -> Unit,
+    quickSwitchViews: List<CalendarView> = IMPLEMENTED_VIEWS,
+    drawerViewOrder: List<CalendarView> = IMPLEMENTED_VIEWS,
     modifier: Modifier = Modifier,
     initialDateIso: String? = null,
     viewModel: DayViewModel = hiltViewModel(),
@@ -165,6 +178,7 @@ fun DayScreen(
             CalendarDrawer(
                 currentView = selectedView,
                 currentDate = date,
+                viewOrder = drawerViewOrder,
                 onSelectView = { view ->
                     onSelectView(view)
                     scope.launch { drawerState.close() }
@@ -186,8 +200,9 @@ fun DayScreen(
                 DayTopBar(
                     date = date,
                     selectedView = selectedView,
-                    onCycleView = { onSelectView(selectedView.next()) },
+                    onCycleView = { onSelectView(selectedView.next(quickSwitchViews)) },
                     onOpenDrawer = { scope.launch { drawerState.open() } },
+                    onOpenSearch = onOpenSearch,
                     scrollBehavior = scrollBehavior,
                 )
             },
@@ -233,6 +248,8 @@ private fun DayContent(
     val threshold = with(density) { 24.dp.toPx() }
     var dragAccum by remember { mutableFloatStateOf(0f) }
     val slideSpec = rememberCalendarSlideSpec()
+    val fadeSpec = rememberCalendarFadeSpec()
+    val reduceMotion = rememberReduceMotion()
 
     // Hoisted above the per-day AnimatedContent so the vertical scroll position
     // survives day-to-day swipes. We only centre on noon once, on first entry
@@ -283,7 +300,7 @@ private fun DayContent(
                 DayUiState.Loading -> "loading"
             }
         },
-        transitionSpec = { calendarSlideTransition(slideDir, slideSpec) },
+        transitionSpec = { calendarSlideTransition(slideDir, slideSpec, fadeSpec, reduceMotion) },
         label = "day-transition",
     ) { s ->
         when (s) {
@@ -340,6 +357,7 @@ private fun DayTopBar(
     selectedView: CalendarView,
     onCycleView: () -> Unit,
     onOpenDrawer: () -> Unit,
+    onOpenSearch: () -> Unit,
     scrollBehavior: androidx.compose.material3.TopAppBarScrollBehavior,
 ) {
     TopAppBar(
@@ -358,6 +376,12 @@ private fun DayTopBar(
             }
         },
         actions = {
+            IconButton(onClick = onOpenSearch) {
+                Icon(
+                    imageVector = Icons.Default.Search,
+                    contentDescription = stringResource(R.string.search_action),
+                )
+            }
             ViewSwitcherPill(
                 current = selectedView,
                 onCycle = onCycleView,
@@ -451,6 +475,8 @@ private fun Timeline(
 ) {
     val totalHeight = HOUR_HEIGHT * 24
     val dark = isSystemInDarkTheme()
+    val use24Hour = LocalUse24HourFormat.current
+    val locale = currentLocale()
 
     Box(modifier = Modifier.fillMaxSize()) {
         // Gutter and day column are two scroll viewports that SHARE one scroll
@@ -473,7 +499,7 @@ private fun Timeline(
                     ) {
                         if (h > 0) {
                             Text(
-                                text = "%02d".format(h),
+                                text = formatHourLabel(h, use24Hour, locale),
                                 style = MaterialTheme.typography.labelSmall,
                                 color = MaterialTheme.colorScheme.onSurfaceVariant,
                                 modifier = Modifier
@@ -496,6 +522,7 @@ private fun Timeline(
                     blocks = state.timed,
                     dark = dark,
                     date = state.date,
+                    today = state.today,
                     onEventClick = onEventClick,
                     onCreateAt = onCreateAt,
                     modifier = Modifier
@@ -512,11 +539,14 @@ private fun DayColumnCard(
     blocks: List<TimedBlock>,
     dark: Boolean,
     date: LocalDate,
+    today: LocalDate,
     onEventClick: (EventInstance) -> Unit,
     onCreateAt: (LocalDate, Int) -> Unit,
     modifier: Modifier = Modifier,
 ) {
     val hourPx = with(LocalDensity.current) { HOUR_HEIGHT.toPx() }
+    val showHourLines = LocalShowHourLines.current
+    val hourLineColor = MaterialTheme.colorScheme.outlineVariant
     Card(
         // Plain rectangular column — the soft corners come from the outer
         // rounded scroll viewport, so inner rounding would look odd at the edges.
@@ -529,6 +559,9 @@ private fun DayColumnCard(
         BoxWithConstraints(
             modifier = Modifier
                 .fillMaxSize()
+                // Faint hour separators sit over the column background but under
+                // the event blocks (drawBehind paints before the children).
+                .hourSeparatorLines(showHourLines, hourPx, hourLineColor)
                 // Tap an empty slot to create an event there. Taps on event
                 // blocks are consumed by their own click handler first, so this
                 // only fires on the column background. Snaps to the tapped hour.
@@ -556,6 +589,10 @@ private fun DayColumnCard(
                         .padding(horizontal = 1.dp),
                 )
             }
+            // Current-time line, on top of the events, only on today's column.
+            if (date == today) {
+                NowLine(date = date, hourHeight = HOUR_HEIGHT)
+            }
         }
     }
 }
@@ -568,7 +605,10 @@ private fun EventBlock(
     modifier: Modifier = Modifier,
 ) {
     val title = block.event.title.ifBlank { stringResource(R.string.event_untitled) }
-    val timeLabel = "${minToHm(block.startMin)}–${minToHm(block.endMin)}"
+    val use24Hour = LocalUse24HourFormat.current
+    val locale = currentLocale()
+    val timeLabel = "${minToHm(block.startMin, use24Hour, locale)}–" +
+        minToHm(block.endMin, use24Hour, locale)
     val showTime = block.endMin - block.startMin >= 45
     Box(
         modifier = modifier
@@ -614,8 +654,8 @@ private fun DayLoading() {
     }
 }
 
-private fun minToHm(min: Int): String =
-    if (min >= MINUTES_PER_DAY) "24:00" else "%02d:%02d".format(min / 60, min % 60)
+private fun minToHm(min: Int, is24Hour: Boolean, locale: Locale): String =
+    formatMinuteOfDay(min, is24Hour, locale)
 
 private fun formatDayTitle(date: LocalDate): String {
     val locale = Locale.getDefault()

app/src/main/java/de/jeanlucmakiola/calendula/ui/detail/EventDetailScreen.kt

@@ -6,7 +6,6 @@ import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.net.Uri
-import androidx.activity.compose.BackHandler
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.background
@@ -92,10 +91,13 @@ import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.EventStatus
 import de.jeanlucmakiola.calendula.domain.RecurringWriteScope
 import de.jeanlucmakiola.calendula.domain.Reminder
+import de.jeanlucmakiola.floret.identity.predictiveBack
 import de.jeanlucmakiola.calendula.ui.common.CalendarFailure
-import de.jeanlucmakiola.calendula.ui.common.OptionCard
+import de.jeanlucmakiola.floret.components.OptionCard
 import de.jeanlucmakiola.calendula.ui.common.currentLocale
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
+import de.jeanlucmakiola.calendula.ui.common.timeOfDayFormatter
+import de.jeanlucmakiola.floret.components.pastelize
 import de.jeanlucmakiola.calendula.ui.common.recurrenceText
 import de.jeanlucmakiola.calendula.ui.common.reminderLeadTimeLabel
 import kotlinx.coroutines.launch
@@ -132,8 +134,6 @@ fun EventDetailScreen(
     val state by viewModel.state.collectAsStateWithLifecycle()
     val deleteState by viewModel.deleteState.collectAsStateWithLifecycle()
 
-    BackHandler(onBack = onBack)
-
     val context = LocalContext.current
     val scope = rememberCoroutineScope()
     val snackbarHostState = remember { SnackbarHostState() }
@@ -214,6 +214,7 @@ fun EventDetailScreen(
     }
 
     Scaffold(
+        modifier = Modifier.predictiveBack(onBack = onBack),
         snackbarHost = { SnackbarHost(snackbarHostState) },
         topBar = {
             TopAppBar(
@@ -249,6 +250,9 @@ fun EventDetailScreen(
                                 contentDescription = stringResource(R.string.event_detail_edit),
                             )
                         }
+                        // Managed special-dates events have no delete — the sync
+                        // would resurrect them; the date is removed at the contact.
+                        if (!s.isManaged) {
                             IconButton(
                                 onClick = onDeleteClick,
                                 enabled = deleteState != DeleteUiState.Deleting,
@@ -259,6 +263,7 @@ fun EventDetailScreen(
                                 )
                             }
                         }
+                    }
                 },
                 colors = TopAppBarDefaults.topAppBarColors(
                     containerColor = MaterialTheme.colorScheme.surface,
@@ -590,10 +595,22 @@ private fun AttendeeRow(attendee: Attendee) {
         verticalAlignment = Alignment.CenterVertically,
     ) {
         Column(modifier = Modifier.weight(1f)) {
+            val hasName = attendee.name.isNotBlank()
             Text(
-                text = attendee.name.ifBlank { attendee.email.orEmpty() },
+                text = if (hasName) attendee.name else attendee.email.orEmpty(),
                 style = MaterialTheme.typography.bodyMedium,
             )
+            // Email as supporting text — only when the name is the headline, so we
+            // don't repeat it on rows that already fall back to the email above.
+            if (hasName) {
+                attendee.email?.takeIf { it.isNotBlank() }?.let { email ->
+                    Text(
+                        text = email,
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
             attendeeRoleLabel(attendee)?.let { roleRes ->
                 Text(
                     text = stringResource(roleRes),
@@ -770,7 +787,7 @@ private fun formatWhen(
     val zid = ZoneId.of(zone.id)
     val dateFull = DateTimeFormatter.ofLocalizedDate(FormatStyle.FULL).withLocale(locale)
     val dateMedium = DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).withLocale(locale)
-    val timeShort = DateTimeFormatter.ofLocalizedTime(FormatStyle.SHORT).withLocale(locale)
+    val timeShort = timeOfDayFormatter(LocalUse24HourFormat.current, locale)
 
     val startLdt = instance.start.toJavaLocalDateTime(zid)
     val allDayLabel = stringResource(R.string.event_detail_all_day)

app/src/main/java/de/jeanlucmakiola/calendula/ui/detail/EventDetailUiState.kt

@@ -15,6 +15,12 @@ sealed interface EventDetailUiState {
         val calendarName: String?,
         /** Whether the owning calendar allows modifying events (shows edit/delete). */
         val canModify: Boolean = false,
+        /**
+         * The event belongs to a managed special-dates calendar: its editable
+         * fields (reminders, notes) can still be edited, but delete is hidden —
+         * the sync would just resurrect it. Contact dates are removed at the source.
+         */
+        val isManaged: Boolean = false,
     ) : EventDetailUiState
 }
 

app/src/main/java/de/jeanlucmakiola/calendula/ui/detail/EventDetailViewModel.kt

@@ -154,6 +154,7 @@ class EventDetailViewModel @Inject constructor(
             detail = corrected,
             calendarName = calendar?.displayName,
             canModify = calendar?.canModifyContents == true,
+            isManaged = calendar?.isManaged == true,
         )
     } catch (e: CancellationException) {
         throw e

app/src/main/java/de/jeanlucmakiola/calendula/ui/edit/EventEditUiState.kt

@@ -29,6 +29,18 @@ data class EventEditUiState(
     val hiddenFields: List<EventFormField> = emptyList(),
     /** True while editing an existing event (the calendar is then fixed). */
     val isEditing: Boolean = false,
+    /**
+     * True when the event's calendar is a contact special-dates calendar the app
+     * manages. While editing such an event the title, date and recurrence are
+     * locked (sync overwrites them); reminders, location and notes stay editable.
+     */
+    val isManaged: Boolean = false,
+    /**
+     * Whether to focus the title and raise the keyboard when this is a fresh
+     * create form (issue #10). Mirrors the settings flag; the screen only acts
+     * on it for a new event with an empty title, never when editing/importing.
+     */
+    val autofocusTitle: Boolean = true,
     /**
      * True while an edit changed the recurrence rule — the save-scope dialog
      * then drops "only this event" (an exception row can't carry a rule).

app/src/main/java/de/jeanlucmakiola/calendula/ui/edit/EventEditViewModel.kt

@@ -13,6 +13,7 @@ import de.jeanlucmakiola.calendula.domain.AccessLevel
 import de.jeanlucmakiola.calendula.domain.Availability
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EditSnapshot
+import de.jeanlucmakiola.calendula.domain.EventAttendee
 import de.jeanlucmakiola.calendula.domain.EventColorOption
 import de.jeanlucmakiola.calendula.domain.EventForm
 import de.jeanlucmakiola.calendula.domain.EventFormField
@@ -107,10 +108,10 @@ class EventEditViewModel @Inject constructor(
     )
 
     private data class ReminderDefaults(
-        val timed: Int?,
-        val allDay: Int?,
-        val timedOverrides: Map<Long, Int?>,
-        val allDayOverrides: Map<Long, Int?>,
+        val timed: List<Int>,
+        val allDay: List<Int>,
+        val timedOverrides: Map<Long, List<Int>>,
+        val allDayOverrides: Map<Long, List<Int>>,
     )
 
     private data class ExternalInputs(
@@ -118,12 +119,27 @@ class EventEditViewModel @Inject constructor(
         val lastUsed: Long?,
         val defaultFields: Set<EventFormField>,
         val allowColorOnUnsupported: Boolean,
+        val autofocusTitle: Boolean,
     )
 
-    /** Writable calendars — the only valid event targets. */
-    private val writableCalendars: Flow<List<CalendarSource>> = repository.calendars()
-        .map { calendars -> calendars.filter { it.canModifyContents } }
-        .catch { emit(emptyList()) }
+    /** Every calendar the provider exposes; the source for both lists below. */
+    private val allCalendars: Flow<List<CalendarSource>> =
+        repository.calendars().catch { emit(emptyList()) }
+
+    /**
+     * Writable calendars — the only valid event targets. Disabled calendars are
+     * excluded, so you can't create into a calendar you've removed from the app;
+     * a last-used preselect landing on a now-disabled calendar falls back to the
+     * first remaining writable one (handled by [resolvedCalendarId] and [state]).
+     * Managed special-dates calendars are excluded too: their events are owned by
+     * the contact sync, which would delete any user event created there.
+     */
+    private val writableCalendars: Flow<List<CalendarSource>> = combine(
+        allCalendars,
+        prefs.disabledCalendarIds,
+    ) { calendars, disabled ->
+        calendars.filter { it.canModifyContents && it.id !in disabled && !it.isManaged }
+    }
 
     /** The target calendar id, resolved exactly as the form shows it. */
     private val resolvedCalendarId: Flow<Long?> = combine(
@@ -151,24 +167,38 @@ class EventEditViewModel @Inject constructor(
             prefs.lastUsedCalendarId,
             settingsPrefs.defaultFormFields,
             settingsPrefs.allowColorOnUnsupportedCalendars,
+            settingsPrefs.autofocusEventTitle,
             ::ExternalInputs,
         ).flowOn(io),
         colorPalette,
-    ) { local, external, palette ->
+        allCalendars,
+    ) { local, external, palette, allCalendars ->
         val form = local.form ?: return@combine null
         val resolvedId = form.calendarId
             ?: external.lastUsed?.takeIf { id -> external.writable.any { it.id == id } }
             ?: external.writable.firstOrNull()?.id
         val resolved = form.copy(calendarId = resolvedId)
+        val resolvedCalendar = allCalendars.firstOrNull { it.id == resolvedId }
+        // Editing an event in a managed calendar locks its synced fields. Keyed
+        // off the calendar's durable marker, not a stored id, so it holds after a
+        // backup restore too.
+        val isManaged = local.editTarget != null && resolvedCalendar?.isManaged == true
+        // The picker offers writable calendars only; when editing a managed event
+        // its own (excluded) calendar is added back so the row still names it.
+        val pickerCalendars =
+            if (isManaged && resolvedCalendar != null) external.writable + resolvedCalendar
+            else external.writable
         val visibleFields = external.defaultFields + local.revealed
         EventEditUiState(
             form = resolved,
-            calendars = external.writable,
+            calendars = pickerCalendars,
             problems = if (local.showProblems) resolved.problems() else emptySet(),
             saveState = local.saveState,
             visibleFields = visibleFields,
             hiddenFields = (EventFormField.entries.toSet() - visibleFields).sorted(),
             isEditing = local.editTarget != null,
+            isManaged = isManaged,
+            autofocusTitle = external.autofocusTitle,
             // A modified-occurrence exception can't carry its own rule, so
             // the scope dialog drops "only this event" after a rule change.
             recurrenceChanged = local.editTarget != null &&
@@ -248,7 +278,7 @@ class EventEditViewModel @Inject constructor(
             // Re-check after suspending: bail if the form closed or the user edited.
             val form = _form.value ?: return@launch
             if (_editTarget.value != null || _remindersTouched.value) return@launch
-            val default = resolveDefaultReminder(
+            val reminders = resolveDefaultReminder(
                 timedGlobal = defaults.timed,
                 allDayGlobal = defaults.allDay,
                 timedOverrides = defaults.timedOverrides,
@@ -256,7 +286,6 @@ class EventEditViewModel @Inject constructor(
                 calendarId = targetId,
                 isAllDay = form.isAllDay,
             )
-            val reminders = listOfNotNull(default)
             _form.value = form.copy(reminders = reminders)
             // Surface the section so an auto-applied default is visible and
             // removable, even when Reminders isn't a default-shown field.
@@ -307,7 +336,11 @@ class EventEditViewModel @Inject constructor(
         _revealed.value = _revealed.value + field
     }
 
-    fun setTitle(value: String) = update { it.copy(title = value) }
+    // The title field wraps (multi-line) so long titles stay visible (#33), but
+    // a title is one logical line: drop any newline the IME's Enter key or a
+    // paste would introduce, so it never reaches the provider's TITLE column.
+    fun setTitle(value: String) =
+        update { it.copy(title = value.replace("\n", "").replace("\r", "")) }
     fun setLocation(value: String) = update { it.copy(location = value) }
     fun setDescription(value: String) = update { it.copy(description = value) }
     fun setAllDay(value: Boolean) {
@@ -353,6 +386,33 @@ class EventEditViewModel @Inject constructor(
         update { it.copy(reminders = it.reminders - minutes) }
     }
 
+    /**
+     * Add a guest, keyed on a trimmed lower-cased email so re-adding the same
+     * address just refreshes it (no duplicate row). A blank email is ignored —
+     * the email is what we write and dedup on.
+     */
+    fun addAttendee(email: String, name: String = "", optional: Boolean = false) {
+        val trimmed = email.trim()
+        if (trimmed.isEmpty()) return
+        update { form ->
+            val attendee = EventAttendee(email = trimmed, name = name.trim(), optional = optional)
+            val rest = form.attendees.filterNot { it.email.equals(trimmed, ignoreCase = true) }
+            form.copy(attendees = rest + attendee)
+        }
+    }
+
+    fun removeAttendee(attendee: EventAttendee) =
+        update { it.copy(attendees = it.attendees.filterNot { a -> a.email.equals(attendee.email, ignoreCase = true) }) }
+
+    /** Flip a guest between required and optional (the per-row role toggle). */
+    fun setAttendeeOptional(attendee: EventAttendee, optional: Boolean) = update { form ->
+        form.copy(
+            attendees = form.attendees.map { a ->
+                if (a.email.equals(attendee.email, ignoreCase = true)) a.copy(optional = optional) else a
+            },
+        )
+    }
+
     /** Moving the start drags the end along, preserving the duration. */
     fun setStartDate(date: LocalDate) = moveStart { LocalDateTime(date, it.time) }
     fun setStartTime(time: LocalTime) = moveStart { LocalDateTime(it.date, time) }
@@ -379,7 +439,15 @@ class EventEditViewModel @Inject constructor(
             _saveState.value = SaveUiState.Saved
             return
         }
-        if (target != null && target.original.rrule != null) {
+        // Changing the calendar moves the event (copy+delete — CALENDAR_ID can't
+        // be updated in place) and is inherently whole-series: an occurrence
+        // can't live in a different calendar than its series, so a move skips the
+        // scope dialog even for a recurring event.
+        val movingCalendar = target != null && form.calendarId != target.original.calendarId
+        // Managed events are a yearly series whose editable fields (reminders,
+        // notes, location) live on the series row — never offer the scope dialog,
+        // which would split the series into an exception the sync then reverts.
+        if (target != null && target.original.rrule != null && !current.isManaged && !movingCalendar) {
             _saveState.value = SaveUiState.AwaitingScope
             return
         }
@@ -434,6 +502,17 @@ class EventEditViewModel @Inject constructor(
                 if (target == null) {
                     repository.createEvent(form)
                     prefs.setLastUsedCalendarId(requireNotNull(form.calendarId))
+                } else if (form.calendarId != target.original.calendarId) {
+                    // Move to the picked calendar (copy+delete), carrying any
+                    // field edits made in the same save. The target becomes the
+                    // last-used calendar, like a create does.
+                    repository.moveEvent(
+                        eventId = target.eventId,
+                        targetCalendarId = requireNotNull(form.calendarId),
+                        original = target.original,
+                        updated = form,
+                    )
+                    prefs.setLastUsedCalendarId(requireNotNull(form.calendarId))
                 } else {
                     when (scope) {
                         RecurringWriteScope.ThisEvent ->

app/src/main/java/de/jeanlucmakiola/calendula/ui/filter/CalendarFilterList.kt

@@ -21,8 +21,8 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.domain.FailureReason
 import de.jeanlucmakiola.calendula.ui.common.CalendarColorChip
-import de.jeanlucmakiola.calendula.ui.common.GroupedRow
-import de.jeanlucmakiola.calendula.ui.common.positionOf
+import de.jeanlucmakiola.floret.components.GroupedRow
+import de.jeanlucmakiola.floret.components.positionOf
 
 /**
  * Calendar-visibility filter (M3), rendered inline in the navigation drawer.

app/src/main/java/de/jeanlucmakiola/calendula/ui/filter/FilterViewModel.kt

@@ -30,11 +30,16 @@ class FilterViewModel @Inject constructor(
         combine(
             repository.calendars(),
             prefs.hiddenCalendarIds,
-        ) { calendars, hidden ->
-            if (calendars.isEmpty()) {
+            prefs.disabledCalendarIds,
+        ) { calendars, hidden, disabled ->
+            // Disabled calendars are gone from the app entirely — they don't
+            // belong in the drawer's hide/show list (you can't hide what's
+            // already disabled). They live only in Settings → Calendars.
+            val enabled = calendars.filterNot { it.id in disabled }
+            if (enabled.isEmpty()) {
                 FilterUiState.Failure(FailureReason.NoCalendarsConfigured)
             } else {
-                FilterUiState.Success(groupByAccount(calendars, hidden))
+                FilterUiState.Success(groupByAccount(enabled, hidden))
             }
         }
             .catch { emit(FilterUiState.Failure(FailureReason.ProviderUnavailable)) }

app/src/main/java/de/jeanlucmakiola/calendula/ui/imports/ImportScreen.kt

@@ -1,16 +1,27 @@
 package de.jeanlucmakiola.calendula.ui.imports
 
 import android.net.Uri
-import androidx.activity.compose.BackHandler
+import androidx.compose.animation.core.Animatable
+import androidx.compose.animation.core.Spring
+import androidx.compose.animation.core.spring
+import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.RowScope
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Check
 import androidx.compose.material.icons.filled.Close
 import androidx.compose.material3.Button
 import androidx.compose.material3.CircularProgressIndicator
@@ -19,6 +30,7 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
@@ -31,6 +43,12 @@ import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.graphicsLayer
+import androidx.compose.ui.semantics.clearAndSetSemantics
+import androidx.compose.ui.semantics.contentDescription
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.res.pluralStringResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
@@ -39,13 +57,16 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.domain.EventForm
 import de.jeanlucmakiola.calendula.domain.ics.IcsParseWarning
-import de.jeanlucmakiola.calendula.ui.common.OptionCard
+import de.jeanlucmakiola.calendula.ui.common.CalendarPickerGroups
+import de.jeanlucmakiola.floret.identity.predictiveBack
 
 /**
  * Handles an opened/received `.ics` file. A single event is handed straight to
  * the prefilled create form via [onOpenSingle]; several events show a target-
  * calendar picker and import in bulk (dedup by UID), then a result summary.
- * Empty/failed files show a short message and close.
+ * Empty/failed files show a short message and close. [forceMany] keeps a
+ * single-event file on the bulk path — used by the in-app restore, whose intent
+ * is "restore a backup" rather than "add this one event".
  */
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -53,27 +74,72 @@ fun ImportScreen(
     uri: Uri,
     onClose: () -> Unit,
     onOpenSingle: (EventForm) -> Unit,
-    viewModel: ImportViewModel = hiltViewModel(),
+    forceMany: Boolean = false,
+    // Key the VM by the file uri. This screen has no nav backstack, so an
+    // unkeyed hiltViewModel() resolves to the Activity's store and is retained
+    // across imports — its one-shot `load` guard would then show the *previous*
+    // file's parsed state on the next import (a second restore, export→restore,
+    // etc.). Keying per uri hands each distinct file a fresh VM (fresh Loading
+    // state), while the same uri (rotation) reuses it and holds the result.
+    viewModel: ImportViewModel = hiltViewModel(key = uri.toString()),
 ) {
-    LaunchedEffect(uri) { viewModel.load(uri) }
+    LaunchedEffect(uri) { viewModel.load(uri, forceMany) }
     val state by viewModel.state.collectAsStateWithLifecycle()
-    BackHandler(onBack = onClose)
 
     // A single event isn't shown here — it opens the create form for review.
     LaunchedEffect(state) {
         (state as? ImportUiState.Single)?.let { onOpenSingle(it.form); onClose() }
     }
 
+    // Hoisted target calendar so the always-visible top-bar Import action can
+    // read it without the user scrolling to a bottom button. Defaults to the
+    // first *local* calendar — the first row the picker shows ("Your calendars"
+    // group leads) — so the pre-selection lines up with the top of the list;
+    // falls back to the first calendar if there are no local ones. Re-defaults
+    // when the "many" list first arrives (keyed on it), then holds the pick.
+    val many = state as? ImportUiState.Many
+    val defaultTarget = many?.calendars?.let { cals ->
+        (cals.firstOrNull { it.isLocal } ?: cals.firstOrNull())?.id
+    }
+    var selected by rememberSaveable(defaultTarget) { mutableStateOf(defaultTarget) }
+
     Scaffold(
-        modifier = Modifier.fillMaxSize(),
+        modifier = Modifier
+            .predictiveBack(onBack = onClose)
+            .fillMaxSize(),
         topBar = {
             TopAppBar(
-                title = { Text(stringResource(R.string.import_title)) },
+                title = {
+                    Text(
+                        if (many != null) {
+                            pluralStringResource(
+                                R.plurals.import_title_count,
+                                many.events.size,
+                                many.events.size,
+                            )
+                        } else {
+                            stringResource(R.string.import_title)
+                        },
+                    )
+                },
                 navigationIcon = {
                     IconButton(onClick = onClose) {
                         Icon(Icons.Default.Close, contentDescription = stringResource(R.string.event_edit_close))
                     }
                 },
+                actions = {
+                    // Only meaningful in the multi-event picker with a writable
+                    // target; every other state has nothing to confirm here.
+                    if (many != null && many.calendars.isNotEmpty()) {
+                        Button(
+                            onClick = { selected?.let(viewModel::import) },
+                            enabled = selected != null,
+                            modifier = Modifier.padding(end = 12.dp),
+                        ) {
+                            Text(stringResource(R.string.import_button))
+                        }
+                    }
+                },
                 colors = TopAppBarDefaults.topAppBarColors(
                     containerColor = MaterialTheme.colorScheme.surface,
                 ),
@@ -89,7 +155,7 @@ fun ImportScreen(
 
                 ImportUiState.Empty -> CenteredMessage(stringResource(R.string.import_empty), onClose)
                 ImportUiState.Failed -> CenteredMessage(stringResource(R.string.import_failed), onClose)
-                is ImportUiState.Many -> ManyContent(s, onImport = viewModel::import)
+                is ImportUiState.Many -> ManyContent(s, selected, onSelect = { selected = it })
                 is ImportUiState.Done -> DoneContent(s, onClose)
             }
         }
@@ -97,84 +163,160 @@ fun ImportScreen(
 }
 
 @Composable
-private fun ManyContent(state: ImportUiState.Many, onImport: (Long) -> Unit) {
+private fun ManyContent(state: ImportUiState.Many, selected: Long?, onSelect: (Long) -> Unit) {
     // No writable calendar to import into — tell the user honestly.
     if (state.calendars.isEmpty()) {
         CenteredMessage(stringResource(R.string.import_no_calendar), onClose = null)
         return
     }
-    var selected by rememberSaveable { mutableStateOf(state.calendars.first().id) }
 
     Column(
         Modifier.fillMaxSize().verticalScroll(rememberScrollState())
-            .padding(horizontal = 16.dp, vertical = 8.dp),
-        verticalArrangement = Arrangement.spacedBy(8.dp),
+            .padding(top = 8.dp, bottom = 24.dp),
     ) {
-        Text(
-            pluralStringResource(R.plurals.import_event_count, state.events.size, state.events.size),
-            style = MaterialTheme.typography.bodyLarge,
-            modifier = Modifier.padding(vertical = 8.dp),
+        CalendarPickerGroups(
+            calendars = state.calendars,
+            selectedId = selected,
+            onSelect = onSelect,
         )
-        Text(
-            stringResource(R.string.import_target_header),
-            style = MaterialTheme.typography.labelLarge,
-            color = MaterialTheme.colorScheme.primary,
-        )
-        state.calendars.forEach { calendar ->
-            OptionCard(
-                label = calendar.displayName,
-                onClick = { selected = calendar.id },
-                selected = calendar.id == selected,
-                icon = null,
-            )
-        }
+        if (state.warnings.isNotEmpty()) {
+            Column(
+                Modifier.padding(horizontal = 24.dp, vertical = 8.dp),
+                verticalArrangement = Arrangement.spacedBy(4.dp),
+            ) {
                 state.warnings.forEach { WarningText(it) }
-        Button(
-            onClick = { onImport(selected) },
-            modifier = Modifier.fillMaxWidth().padding(top = 8.dp),
-        ) {
-            Text(pluralStringResource(R.plurals.import_action, state.events.size, state.events.size))
+            }
         }
     }
 }
 
 @Composable
 private fun DoneContent(state: ImportUiState.Done, onClose: () -> Unit) {
+    // A little expressive pop on the success badge — springs in on first show.
+    val badgeScale = remember { Animatable(0.7f) }
+    LaunchedEffect(Unit) {
+        badgeScale.animateTo(
+            targetValue = 1f,
+            animationSpec = spring(
+                dampingRatio = Spring.DampingRatioMediumBouncy,
+                stiffness = Spring.StiffnessLow,
+            ),
+        )
+    }
+
     Column(
         Modifier.fillMaxSize().padding(24.dp),
-        verticalArrangement = Arrangement.spacedBy(12.dp),
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
+        Spacer(Modifier.weight(1f))
+        Box(
+            Modifier
+                .size(112.dp)
+                .graphicsLayer {
+                    scaleX = badgeScale.value
+                    scaleY = badgeScale.value
+                }
+                .clip(CircleShape)
+                .background(MaterialTheme.colorScheme.primaryContainer),
+            contentAlignment = Alignment.Center,
+        ) {
+            Icon(
+                Icons.Default.Check,
+                contentDescription = null,
+                tint = MaterialTheme.colorScheme.onPrimaryContainer,
+                modifier = Modifier.size(56.dp),
+            )
+        }
+        Spacer(Modifier.height(24.dp))
         Text(
             stringResource(R.string.import_done_title),
             style = MaterialTheme.typography.headlineSmall,
-            modifier = Modifier.padding(top = 24.dp),
+            color = MaterialTheme.colorScheme.onSurface,
         )
+        if (state.summary.skippedDuplicate > 0) {
+            Spacer(Modifier.height(8.dp))
             Text(
-            pluralStringResource(
+                stringResource(R.string.import_done_dedup_note),
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                textAlign = TextAlign.Center,
+            )
+        }
+        Spacer(Modifier.height(24.dp))
+        Row(
+            Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.spacedBy(12.dp),
+        ) {
+            ImportStatCard(
+                count = state.summary.imported,
+                label = stringResource(R.string.import_done_added_label),
+                contentDescription = pluralStringResource(
                     R.plurals.import_done_imported,
                     state.summary.imported,
                     state.summary.imported,
                 ),
-            style = MaterialTheme.typography.bodyLarge,
+                container = MaterialTheme.colorScheme.secondaryContainer,
+                onContainer = MaterialTheme.colorScheme.onSecondaryContainer,
             )
             if (state.summary.skippedDuplicate > 0) {
-            Text(
-                pluralStringResource(
+                ImportStatCard(
+                    count = state.summary.skippedDuplicate,
+                    label = stringResource(R.string.import_done_skipped_label),
+                    contentDescription = pluralStringResource(
                         R.plurals.import_done_skipped,
                         state.summary.skippedDuplicate,
                         state.summary.skippedDuplicate,
                     ),
-                style = MaterialTheme.typography.bodyMedium,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    container = MaterialTheme.colorScheme.surfaceContainerHighest,
+                    onContainer = MaterialTheme.colorScheme.onSurfaceVariant,
                 )
             }
-        Button(onClick = onClose, modifier = Modifier.padding(top = 12.dp)) {
+        }
+        Spacer(Modifier.weight(1f))
+        Button(
+            onClick = onClose,
+            modifier = Modifier.fillMaxWidth(),
+        ) {
             Text(stringResource(R.string.import_close))
         }
     }
 }
 
+/** A big-number tonal tile summarising one import outcome (added / skipped). */
+@Composable
+private fun RowScope.ImportStatCard(
+    count: Int,
+    label: String,
+    contentDescription: String,
+    container: Color,
+    onContainer: Color,
+) {
+    Surface(
+        modifier = Modifier
+            .weight(1f)
+            .clearAndSetSemantics { this.contentDescription = contentDescription },
+        shape = RoundedCornerShape(24.dp),
+        color = container,
+    ) {
+        Column(
+            Modifier.padding(vertical = 20.dp, horizontal = 12.dp),
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.spacedBy(2.dp),
+        ) {
+            Text(
+                count.toString(),
+                style = MaterialTheme.typography.displaySmall,
+                color = onContainer,
+            )
+            Text(
+                label,
+                style = MaterialTheme.typography.labelLarge,
+                color = onContainer.copy(alpha = 0.85f),
+            )
+        }
+    }
+}
+
 @Composable
 private fun WarningText(warning: IcsParseWarning) {
     val text = when (warning) {

app/src/main/java/de/jeanlucmakiola/calendula/ui/imports/ImportViewModel.kt

@@ -7,6 +7,7 @@ import dagger.hilt.android.lifecycle.HiltViewModel
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
 import de.jeanlucmakiola.calendula.data.di.IoDispatcher
 import de.jeanlucmakiola.calendula.data.ics.IcsImporter
+import de.jeanlucmakiola.calendula.data.prefs.CalendarPrefs
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventForm
 import de.jeanlucmakiola.calendula.domain.ics.IcsImportSummary
@@ -56,6 +57,7 @@ sealed interface ImportUiState {
 class ImportViewModel @Inject constructor(
     private val repository: CalendarRepository,
     private val importer: IcsImporter,
+    private val prefs: CalendarPrefs,
     @IoDispatcher private val io: CoroutineDispatcher,
 ) : ViewModel() {
 
@@ -64,8 +66,13 @@ class ImportViewModel @Inject constructor(
     val state: StateFlow<ImportUiState> = _state.asStateFlow()
     private var started = false
 
-    /** Read + parse [uri] once; subsequent calls (recomposition) are ignored. */
-    fun load(uri: Uri) {
+    /**
+     * Read + parse [uri] once; subsequent calls (recomposition) are ignored.
+     * When [forceMany] is set (an in-app restore), a single-event file still goes
+     * through the bulk picker + summary rather than the prefilled create form —
+     * a restore is "bring back a backup", not "add this one event".
+     */
+    fun load(uri: Uri, forceMany: Boolean = false) {
         if (started) return
         started = true
         viewModelScope.launch {
@@ -75,18 +82,26 @@ class ImportViewModel @Inject constructor(
             _state.value = when {
                 parsed == null -> ImportUiState.Failed
                 parsed.events.isEmpty() -> ImportUiState.Empty
-                parsed.events.size == 1 -> ImportUiState.Single(
+                parsed.events.size == 1 && !forceMany -> ImportUiState.Single(
                     form = parsed.events.single().toEventForm(TimeZone.currentSystemDefault()),
                     warnings = parsed.warnings,
                 )
-                else -> ImportUiState.Many(
+                else -> {
+                    // A disabled calendar is removed from the app, so it can't be
+                    // an import target — exclude it alongside the read-only ones.
+                    // Managed special-dates calendars are contact-derived and
+                    // editor-locked, so they're not a valid destination either.
+                    val disabled = prefs.disabledCalendarIds.first()
+                    ImportUiState.Many(
                         events = parsed.events,
                         warnings = parsed.warnings,
-                    calendars = repository.calendars().first().filter { it.canModifyContents },
+                        calendars = repository.calendars().first()
+                            .filter { it.canModifyContents && !it.isManaged && it.id !in disabled },
                     )
                 }
             }
         }
+    }
 
     /** Bulk-import the parsed events into [targetCalendarId]; result → [ImportUiState.Done]. */
     fun import(targetCalendarId: Long) {