release: cut v2.3.0 — Material 3 grouped-list redesign of Settings, calendars & drawer

One shared Material 3 grouped-list blueprint, modelled on the ReFra gallery app
and extracted to ui/common/GroupedList.kt: CollapsingScaffold (a LargeTopAppBar
whose large title collapses into the bar on scroll) and GroupedRow
(Position-based corner grouping so a run of rows reads as one rounded card, with
press-animated corners and selected/minHeight knobs).

Settings: restructured into a category hub (About card on top, version mark at
the foot) with sliding sub-pages for Appearance, the new-event form and
Notifications. Theme, week-start and language pickers migrated from DropdownMenu
to OptionCard dialogs; token-based icon chips. New ic_gitea.xml (Simple Icons,
verbatim path) for the About "Source" button; en+de strings.

Calendar manager: same collapsing scaffold + grouped rows; shared
CalendarColorChip (neutral chip with a pastelised calendar glyph) replaces the
bright colour swatch.

Navigation drawer: branded header, grouped View switcher (active view
highlighted via secondaryContainer), filter list restyled to grouped rows with a
trailing checkbox; the whole drawer now scrolls as one.

Cards use surfaceContainerHigh for readable contrast against surface. Version
bumped to 2.3.0 / 20300. UI-only; unit tests green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.planning/ROADMAP.md

@@ -107,43 +107,207 @@ Deliberately deferred (add only if needed):
 - Snooze / dismiss notification actions (Etar has them)
 - Battery-optimization exemption prompt for delivery reliability
 
-## v3.0 — Power-User Features
+## v2.1 — Month event grid + drawer view tabs (shipped 2026-06-15)
 
-- Home-screen widget
-- Full-text search
-- Tablet / foldable layouts
-- Optional: ICS file import (drag-and-drop)
-- Optional: move event to another calendar (copy+delete model with a
-  consequences warning — deferred from v2.0, see above)
+- Month grid shows real events as continuous multi-day bars (not just dots)
+- View section in the navigation drawer to switch Month / Week / Day
+- Fix: text cursor no longer jumps in event text fields
 
-Order is indicative — community feedback after V1 may re-prioritize.
+## v2.2 — Tap-to-create + local calendar management (shipped 2026-06-16)
 
-## Idea backlog — Daily-driver polish (captured 2026-06-11, all approved as ideas, unscheduled)
+- Tap an empty slot in day/week → create form prefilled with that day + the
+  tapped hour (snapped to the hour, 1 h long)
+- Local (device-only) calendar management in a full-screen editor from
+  Settings → Calendars: create / rename / recolor / delete, with name,
+  pastel-previewed colour, and description (stored in `CAL_SYNC1`)
+- Synced calendars listed read-only, grouped by account, each with a
+  per-account "manage in source app" deep-link (resolved from the account's
+  authenticator — DAVx5/ICSx5/…) + an add-account shortcut
+- Shared `InlineTextField` extracted to `ui.common` (event form + calendar
+  editor share one input style)
 
-Interaction:
-- Tap/long-press an empty slot in day/week → create form prefilled with that time
-- Drag & drop rescheduling in day/week (recurring drops reuse the scope dialog) — big-ticket, own slice
-- Agenda view (fourth view: upcoming events grouped by day; natural widget data source)
+## v2.3 — Material 3 grouped-list redesign (shipped 2026-06-16)
+
+A structural + visual pass adopting one shared blueprint (modelled on the ReFra
+gallery app) across Settings, the calendar manager and the navigation drawer.
+
+- Shared `ui/common/GroupedList.kt`: `CollapsingScaffold` (a `LargeTopAppBar`
+  whose title collapses on scroll) + `GroupedRow` (Position-based corner
+  grouping, press-animated corners, `selected` + `minHeight` knobs).
+- Settings: category hub with About card on top and sliding sub-pages
+  (Appearance / New event form / Notifications); theme/week-start/language
+  pickers moved from `DropdownMenu` to OptionCard dialogs; token-based icon
+  chips; `ic_gitea.xml` for the About "Source" button.
+- Calendar manager + drawer restyled to match; shared `CalendarColorChip`;
+  drawer scrolls as one with the active view highlighted.
+- Cards use `surfaceContainerHigh` for readable contrast.
+- Donate button on the About card deferred (target TBD).
+
+---
+
+# Backlog (theme-based, post-v2.1)
+
+The old v3.0 / "daily-driver polish" / "Locations & People" lists are
+consolidated here by theme. Within a group, **(in progress)** /
+**(next)** mark what is being or about to be worked; everything else is an
+approved-but-unscheduled idea unless tagged **(idea)** /
+**(go/no-go)** / **(rejected)**. Order across groups is not a commitment.
+
+## Near-term sequence (ranked, 2026-06-16)
+
+The theme groups below are the full menu; this is the committed *order* for
+the next stretch. Ranking favours finishing the current create/edit + calendar
+arc before opening new fronts, then cheap-relative-to-value items and ones that
+unblock a later item. Order is a plan, not a contract — revisit after each lands.
+
+**Tier 1 — finish the current arc (create/edit + calendars)**
+1. Tap-to-create in day/week *(shipped v2.2.0)* — prefilled create from an empty slot
+2. Local calendar management + "manage in source app" deep-links *(shipped v2.2.0)*
+3. ~~Settings redesign & restructure~~ *(shipped v2.3.0 — grew into the full
+   grouped-list blueprint across Settings + calendars + drawer; see "v2.3"
+   above)*
+4. **Per-event color** *(next)* — reuses the calendar color picker/palette; closes the create/edit theme
+5. Duplicate event — detail action → prefilled create form; near-free on the tap-to-create prefill infra
+
+(Tier 2+ numbering below shifts accordingly; ranking unchanged.)
+
+### Settings redesign & restructure *(shipped v2.3.0)*
+
+The original scope below is kept as a record; the implementation expanded from a
+sub-screen restructure into the shared grouped-list blueprint (see "v2.3" above).
+
+The settings screen has grown into a flat vertical scroll of divider-separated
+sections (Appearance, Event form, Notifications, Calendars, Language, About) and
+will keep accreting rows (per-event-color defaults, default reminder, more
+calendar entries are all queued). It needs structure before it gets unwieldy.
+
+**Decided (2026-06-16): sub-screens**, not flat-but-carded. The top level
+becomes a category list; each category opens its own destination. More
+M3-idiomatic for a settings surface that will keep growing, and it mirrors the
+existing Calendars row, which already navigates out to its own screen.
+
+Structure — top-level settings list → category destinations:
+- **Appearance** → theme, dynamic colour, week start
+- **Event form** → the 6 default-field toggles + the hint text
+- **Notifications** → reminders toggle (POST_NOTIFICATIONS flow stays)
+- **Calendars** → already its own screen (`CalendarsScreen`); just becomes a
+  peer category row, no change to that screen
+- **Language** → single control; keep as a top-level row that opens an
+  OptionCard directly (a whole sub-screen for one choice is overkill)
+- **About** → kept inline on the top-level list as a card (read-only info,
+  not worth a navigation hop). Card layout, top → bottom:
+  - **Identity** — app logo + name "Calendula", with "by Jean-Luc Makiola"
+    as a subtitle beneath the name
+  - **Action buttons** (small, button-styled, sit in a row):
+    - **Source** — Gitea logo, opens the repo (`about_source_url`)
+    - **License** — opens the LICENSE file on Gitea
+    - **Donate** *(tentative)* — sits next to Source; target TBD (decide
+      before building: Liberapay / Ko-fi / Gitea sponsor / etc.)
+  - **Version** — small version number at the bottom of the card
+
+Scope:
+- **Navigation** — add the settings sub-screen destinations alongside the
+  existing settings/calendars routes in `CalendarHost`; back pops to the
+  settings list (mind the existing `BackHandler` that guards against falling
+  through to the activity).
+- **Fix the dialog-pattern violation** — theme, week-start and language use
+  `DropdownMenu`; the project default is the full-width tonal OptionCard modal
+  (radio/dropdown/text-list dialogs are banned, see
+  `option-card-modal-style-default`). Migrate these selectors to OptionCard.
+- **Visual pass** — top-level category rows with leading icons; consistent
+  spacing and row affordances aligned with the event-form card design system.
+
+Out of scope (no new settings *features* here) — this is a structure + style
+pass on the existing controls; new toggles ride in with their own features.
+
+**Tier 2 — navigation & daily-driver completeness**
+5. Jump-to-date — drawer date picker (un-cut from V1); cheap, fills the nav gap
+6. Agenda view — the missing 4th view; serves daily-driver users *and* becomes the data source for the widget
+
+**Tier 3 — platform reach (depends on Tier 2)**
+7. Home-screen widget — built on the agenda data source from #6
+8. App shortcuts (launcher long-press → New event); cheap, optional quick-settings tile
+
+**Tier 4 — interop & bigger-ticket**
+9. Share event as .ics + receive/open .ics into a prefilled create form
+10. Default reminder applied to new events; then snooze/dismiss notification actions
+11. Drag & drop rescheduling in day/week — big-ticket, own slice (recurring drops reuse the scope dialog)
+
+**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
+- Move event to another calendar — sync-adapter minefield (copy+delete model)
+
+**Unranked / fill-in** — pinch-to-zoom time scale, tablet/foldable layouts,
+full-text search, ICS file import. Pulled in opportunistically, not sequenced.
+
+Debatable calls worth a second look: widget (#7) vs .ics interop (#9) ordering;
+whether drag-drop (#11) jumps ahead given its daily-driver impact.
+
+## Navigation & views
+
+- ~~Tap an empty slot in day/week → create form prefilled with that
+  date+time, snapped to the hour~~ **shipped v2.2.0** (long-press variant
+  not added — single tap covers it)
+- 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)
 - Pinch-to-zoom time scale in day/week
+- Tablet / foldable layouts *(was v3.0)*
+- Full-text search *(was v3.0)*
 
-Reminders, round two:
-- Snooze + dismiss actions on the notification (snooze needs an exact-alarm/WorkManager decision)
+## 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.
+
+## Calendars & accounts
+
+- ~~Create / manage local (device-only) calendars~~ **shipped v2.2.0** —
+  name + color + description; rename / recolor / delete the calendars the app
+  owns. Inserted under `ACCOUNT_TYPE_LOCAL` as a sync adapter; description in
+  `CAL_SYNC1`. Full-screen "Calendars" editor reached from Settings.
+- ~~Per-calendar "manage in source app" deep-link~~ **shipped v2.2.0** — for
+  synced calendars, open the app the calendar actually came from based on
+  its `ACCOUNT_TYPE` (DAVx5 `bitfire.at.davdroid`, Google `com.google`,
+  …); fall back to system account/sync settings. Plus an "add account"
+  entry into system Accounts. Honest boundary for remote calendars.
+- **Remote calendar create/edit** *(go/no-go)* — creating a CalDAV
+  collection (`MKCALENDAR`) or a Google calendar means an in-app sync
+  client: **INTERNET permission, credential storage, the full server
+  round-trip** — i.e. re-implementing DAVx5. DAVx5 exposes no public
+  intent to delegate the create to it. Cosmetic local edits (color/name)
+  to an existing synced row are possible but don't propagate to the server
+  and may be overwritten on next sync — not promised. Same explicit
+  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)*
+
+## Reminders, round two
+
+- Snooze + dismiss actions on the notification (snooze needs an
+  exact-alarm / WorkManager decision)
 - Settings default reminder applied to new events
 
-Event niceties:
-- Duplicate event (detail action → prefilled create form)
-- Per-event color (`Events.EVENT_COLOR`, OptionCard picker in the form)
-- Share event as .ics + open/receive .ics into a prefilled create form (front-runs v3 ICS import)
+## Sharing & interop
 
-Small delights:
+- 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)*
+
+## Platform & launchers
+
+- Home-screen widget *(was v3.0)*
 - App shortcuts (launcher long-press → New event), maybe a quick-settings tile
-- Jump to date (un-cut from V1 — drawer date picker)
 
-Consciously rejected: travel time / weather / smart suggestions (network,
-core-promise conflict), natural-language quick entry (high effort,
-locale-fragile, prefilled form already covers fast entry).
-
-## Idea backlog — Locations & People (captured 2026-06-11, undecided)
+## Locations & People *(go/no-go, captured 2026-06-11)*
 
 Beyond classic calendar-client scope; discussed, deliberately not planned
 in detail yet:
@@ -163,3 +327,10 @@ in detail yet:
 - **Attendee editing / invites from contacts** — own milestone; writing
   `Attendees` rows touches sync-adapter invitation behavior (Google vs
   DAVx5 differ).
+
+## Consciously rejected
+
+- Travel time / weather / smart suggestions (network, core-promise conflict)
+- 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)

.planning/STATE.md

@@ -1,13 +1,15 @@
 # Calendula — Current State
 
-*Last updated: 2026-06-11*
+*Last updated: 2026-06-16*
 
 ## Status
 
-**Milestone:** 2 (write support) **complete** — v2.0.0 shipped 2026-06-11.
-**Phase:** between milestones. Next: v3.0 (power-user features) and the
-go/no-go on the "Locations & People" idea backlog (`ROADMAP.md`). Docs
-pass done (ARCHITECTURE.md, README overhaul, planning docs refreshed).
+**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. The
+backlog is now organised by theme in `ROADMAP.md`.
 
 ## Progress
 
@@ -71,10 +73,45 @@ pass done (ARCHITECTURE.md, README overhaul, planning docs refreshed).
   quick-add cut, calendar-switch → v3 backlog; F-Droid/README copy
   refreshed, fastlane screenshots DE+EN captured on-device
 
+- [x] v2.1 (shipped 2026-06-15) — month grid shows real events as
+  continuous multi-day bars; navigation-drawer View section
+  (Month/Week/Day); cursor-jump fix in event text fields
+
+- [x] v2.2 (shipped 2026-06-16) — tap an empty slot in day/week to create
+  (prefilled with that day + tapped hour, snapped to the hour); local
+  calendar management in a full-screen editor from Settings →
+  Calendars: create/rename/recolor/delete device-only calendars
+  (`ACCOUNT_TYPE_LOCAL`, sync-adapter insert) with name, pastel-previewed
+  colour, and description (stored in `CAL_SYNC1`); synced calendars listed
+  read-only grouped by account with a per-account "manage in source app"
+  deep-link (resolved from the account's authenticator: DAVx5/ICSx5/…) and
+  an add-account shortcut. Shared `InlineTextField` extracted to `ui.common`
+
+- [x] v2.3 settings/calendars/drawer redesign (shipped 2026-06-16) — adopted a
+  shared Material 3 grouped-list blueprint, modelled on the ReFra gallery app
+  and extracted to `ui/common/GroupedList.kt` (`CollapsingScaffold` with a
+  `LargeTopAppBar` exit-until-collapsed title; `GroupedRow` with Position-based
+  corner grouping, press-animated corners, `selected` + `minHeight` knobs).
+    - Settings: category hub (About card on top → version mark at the foot) with
+      sliding sub-pages (Appearance / New event form / Notifications); token-
+      based icon chips; theme/week-start/language pickers migrated from
+      `DropdownMenu` to OptionCard dialogs. New `ic_gitea.xml` (Simple Icons,
+      verbatim path) for the About "Source" button; en+de strings.
+    - Calendar manager: same collapsing scaffold + grouped rows; shared
+      `CalendarColorChip` (neutral chip, pastelised calendar glyph).
+    - Navigation drawer: branded header, grouped View switcher (active view
+      highlighted via `secondaryContainer`), the filter list restyled to
+      grouped rows with a trailing checkbox; the whole drawer scrolls as one.
+    - Cards use `surfaceContainerHigh` for readable contrast against `surface`.
+    - Donate button on the About card deferred (target still TBD).
+
 ## Next
 
-1. Decide the "Locations & People" go/no-go (INTERNET permission question)
-   — see `ROADMAP.md` idea backlog
-2. v3.0 scoping: widget, full-text search, tablet layouts, ICS import,
-   calendar-move
-3. Monitor the F-Droid build/publish for the v1.4.0 / v2.0.0 tags
+1. Monitor the F-Droid build/publish for the v2.3.0 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. **Per-event color** is next — reuses the color picker + palette plumbing
+   from local calendar management; finishes the create/edit theme.
+4. Then agenda view (strategic, backs a future widget); jump-to-date and
+   duplicate event remain cheap follow-ups. Full ranked sequence in
+   `ROADMAP.md` → "Near-term sequence".

CHANGELOG.md

@@ -7,6 +7,47 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.3.0] — 2026-06-16
+
+### Changed
+- Redesigned Settings around the Material 3 grouped-list pattern: a large
+  title that collapses into the toolbar as you scroll, category cards on the
+  main screen, and dedicated sub-pages for Appearance, the new-event form, and
+  Notifications. The theme, week-start and language pickers now use the app's
+  standard option-card dialogs instead of dropdown menus
+- About moved to the top of Settings as a card — app icon, author, and quick
+  links to the source code and licence — with the version shown plainly at the
+  foot of the list
+- The Calendars screen now uses the same grouped-card layout and collapsing
+  title, and each calendar shows a soft pastel-tinted calendar glyph rather
+  than a plain colour swatch
+- Redesigned the navigation drawer to match: a branded header, the
+  Month / Week / Day switch and your calendars as grouped cards (with the
+  active view highlighted), and the whole drawer now scrolls as one
+
+## [2.2.0] — 2026-06-16
+
+### Added
+- Tap an empty slot in the day or week view to create an event there: the
+  create form opens prefilled with that day and the tapped hour (snapped to
+  the hour, one hour long). Tapping an existing event still opens it
+- Local calendars: create and manage device-only calendars that live
+  entirely on this phone — no account, no sync — from a new "Calendars"
+  screen in Settings. Give each a name, a colour, and an optional
+  description; rename, recolour, or delete them later. Useful when you want
+  a calendar without setting up an account
+- The Calendars screen also lists your synced calendars (DAVx5, ICSx5, …)
+  grouped by account, each with a "Manage" button that opens the app the
+  calendar actually comes from, plus an "Add account" shortcut to the
+  system account settings. Calendula never touches a synced calendar's
+  server itself — that stays with its own app
+
+### Changed
+- Colour swatches in the calendar editor now preview the soft, pastel tone
+  a calendar is actually drawn with, instead of a bright raw colour
+- The calendar editor reuses the event form's field and button styling for
+  a consistent look
+
 ## [2.1.0] — 2026-06-15
 
 ### Added

app/build.gradle.kts

@@ -28,8 +28,8 @@ android {
         // the tag, with versionCode = MAJOR*10000 + MINOR*100 + PATCH
         // (e.g. v2.0.0 -> 20000). These committed values are the dev/local
         // default; keep them matching the latest released tag. See docs/RELEASING.md.
-        versionCode = 20100
-        versionName = "2.1.0"
+        versionCode = 20300
+        versionName = "2.3.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }

app/src/main/AndroidManifest.xml

@@ -6,6 +6,18 @@
     <uses-permission android:name="android.permission.WRITE_CALENDAR" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
 
+    <!-- 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
+         intent makes launchable apps visible so we can launch whichever app owns a
+         calendar account's authenticator. -->
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.MAIN" />
+            <category android:name="android.intent.category.LAUNCHER" />
+        </intent>
+    </queries>
+
     <application
         android:name=".CalendulaApp"
         android:allowBackup="true"

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

@@ -6,6 +6,7 @@ import android.content.ContentValues
 import android.content.Context
 import android.database.ContentObserver
 import android.database.Cursor
+import android.net.Uri
 import android.os.Handler
 import android.os.Looper
 import android.provider.CalendarContract
@@ -36,6 +37,19 @@ interface CalendarDataSource {
     fun instances(beginMillis: Long, endMillis: Long): List<EventInstance>
     fun eventDetail(eventId: Long): EventDetail?
 
+    /**
+     * Create a new device-only (`ACCOUNT_TYPE_LOCAL`) calendar the app owns;
+     * returns its `Calendars._ID`. Inserted through the sync-adapter URI so the
+     * provider keeps the row (a plain insert is rejected for the LOCAL account).
+     */
+    fun createLocalCalendar(displayName: String, color: Int, description: String?): Long
+
+    /** Update name, color and description of a local calendar the app owns. */
+    fun updateCalendar(id: Long, displayName: String, color: Int, description: String?)
+
+    /** Permanently delete a local calendar the app owns, with all its events. */
+    fun deleteCalendar(id: Long)
+
     /** Insert a new event; returns the new `Events._ID`. */
     fun insertEvent(form: EventForm): Long
 
@@ -105,6 +119,76 @@ class AndroidCalendarDataSource @Inject constructor(
         CalendarContract.Calendars.CALENDAR_DISPLAY_NAME + " ASC",
     )?.use { it.mapAll(::toCalendarSource) } ?: emptyList()
 
+    /**
+     * Calendar-row writes must address the provider as a sync adapter and name
+     * the account in the URI; otherwise inserts/deletes for the LOCAL account
+     * are silently dropped or only soft-deleted.
+     */
+    private fun localCalendarsUri(): Uri = CalendarContract.Calendars.CONTENT_URI.buildUpon()
+        .appendQueryParameter(CalendarContract.CALLER_IS_SYNCADAPTER, "true")
+        .appendQueryParameter(CalendarContract.Calendars.ACCOUNT_NAME, LOCAL_ACCOUNT_NAME)
+        .appendQueryParameter(
+            CalendarContract.Calendars.ACCOUNT_TYPE,
+            CalendarContract.ACCOUNT_TYPE_LOCAL,
+        )
+        .build()
+
+    override fun createLocalCalendar(displayName: String, color: Int, description: String?): 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)
+            // NAME is the sync-adapter id; DISPLAY_NAME is what the user sees.
+            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)
+            putDescription(description)
+        }
+        val uri = resolver.insert(localCalendarsUri(), values)
+            ?: throw WriteFailedException("create local calendar '$name'")
+        return ContentUris.parseId(uri)
+    }
+
+    override fun updateCalendar(id: Long, displayName: String, color: Int, description: String?) {
+        val name = displayName.trim().ifEmpty { Fallbacks.UNNAMED_CALENDAR }
+        val values = ContentValues().apply {
+            put(CalendarContract.Calendars.CALENDAR_DISPLAY_NAME, name)
+            put(CalendarContract.Calendars.NAME, name)
+            put(CalendarContract.Calendars.CALENDAR_COLOR, color)
+            putDescription(description)
+        }
+        val rows = resolver.update(
+            ContentUris.withAppendedId(localCalendarsUri(), id),
+            values, null, null,
+        )
+        if (rows == 0) throw WriteFailedException("update calendar id=$id")
+    }
+
+    /** Store the description in CAL_SYNC1, or clear it when blank/absent. */
+    private fun ContentValues.putDescription(description: String?) {
+        val text = description?.trim().orEmpty()
+        if (text.isEmpty()) {
+            putNull(CalendarProjection.DESCRIPTION_COLUMN)
+        } else {
+            put(CalendarProjection.DESCRIPTION_COLUMN, text)
+        }
+    }
+
+    override fun deleteCalendar(id: Long) {
+        val deleted = resolver.delete(
+            ContentUris.withAppendedId(localCalendarsUri(), id),
+            null, null,
+        )
+        if (deleted == 0) throw WriteFailedException("delete calendar id=$id")
+    }
+
     override fun instances(beginMillis: Long, endMillis: Long): List<EventInstance> {
         val uri = CalendarContract.Instances.CONTENT_URI.buildUpon().apply {
             ContentUris.appendId(this, beginMillis)
@@ -425,5 +509,11 @@ class AndroidCalendarDataSource @Inject constructor(
 
     private companion object {
         const val TAG = "CalendarDataSource"
+
+        /**
+         * Shared account for every app-created local calendar, so they group
+         * together (by account) in the filter sheet and calendar manager.
+         */
+        const val LOCAL_ACCOUNT_NAME = "Calendula"
     }
 }

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

@@ -3,14 +3,26 @@ package de.jeanlucmakiola.calendula.data.calendar
 import android.provider.CalendarContract
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 
-internal fun ColumnReader.toCalendarSource(): CalendarSource = CalendarSource(
+internal fun ColumnReader.toCalendarSource(): CalendarSource {
+    val accountType = getString(CalendarProjection.IDX_ACCOUNT_TYPE).orEmpty()
+    val isLocal = accountType == CalendarContract.ACCOUNT_TYPE_LOCAL
+    return CalendarSource(
         id = getLong(CalendarProjection.IDX_ID),
         displayName = getString(CalendarProjection.IDX_DISPLAY_NAME)
             ?: Fallbacks.UNNAMED_CALENDAR,
         accountName = getString(CalendarProjection.IDX_ACCOUNT_NAME).orEmpty(),
-    accountType = getString(CalendarProjection.IDX_ACCOUNT_TYPE).orEmpty(),
+        accountType = accountType,
         color = getInt(CalendarProjection.IDX_COLOR),
         isVisibleInSystem = getInt(CalendarProjection.IDX_VISIBLE) != 0,
         canModifyContents = getInt(CalendarProjection.IDX_ACCESS_LEVEL) >=
             CalendarContract.Calendars.CAL_ACCESS_CONTRIBUTOR,
+        isLocal = isLocal,
+        // CAL_SYNC1 holds the sync token for synced rows, so only treat it as a
+        // user description on the local calendars the app owns.
+        description = if (isLocal) {
+            getString(CalendarProjection.IDX_DESCRIPTION)?.takeIf { it.isNotBlank() }
+        } else {
+            null
+        },
     )
+}

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

@@ -12,6 +12,15 @@ interface CalendarRepository {
     fun instances(range: ClosedRange<Instant>): Flow<List<EventInstance>>
     suspend fun eventDetail(eventId: Long): EventDetail
 
+    /** Create a device-only (LOCAL) calendar the app owns; returns its id. */
+    suspend fun createLocalCalendar(displayName: String, color: Int, description: String?): Long
+
+    /** Update name, color and description of a local calendar the app owns. */
+    suspend fun updateCalendar(id: Long, displayName: String, color: Int, description: String?)
+
+    /** Permanently delete a local calendar the app owns, with all its events. */
+    suspend fun deleteCalendar(id: Long)
+
     /** Create a new event from a validated form; returns the new `Events._ID`. */
     suspend fun createEvent(form: EventForm): Long
 

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

@@ -70,6 +70,24 @@ class CalendarRepositoryImpl @Inject constructor(
         dataSource.eventDetail(eventId) ?: throw NoSuchEventException(eventId)
     }
 
+    override suspend fun createLocalCalendar(
+        displayName: String,
+        color: Int,
+        description: String?,
+    ): Long = withContext(io) {
+        dataSource.createLocalCalendar(displayName, color, description)
+    }
+
+    override suspend fun updateCalendar(
+        id: Long,
+        displayName: String,
+        color: Int,
+        description: String?,
+    ) = withContext(io) { dataSource.updateCalendar(id, displayName, color, description) }
+
+    override suspend fun deleteCalendar(id: Long) =
+        withContext(io) { dataSource.deleteCalendar(id) }
+
     override suspend fun createEvent(form: EventForm): Long = withContext(io) {
         dataSource.insertEvent(form)
     }

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

@@ -11,8 +11,14 @@ internal object CalendarProjection {
         CalendarContract.Calendars.CALENDAR_COLOR,
         CalendarContract.Calendars.VISIBLE,
         CalendarContract.Calendars.CALENDAR_ACCESS_LEVEL,
+        // CalendarContract has no description column; for the local calendars we
+        // 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,
     )
 
+    const val DESCRIPTION_COLUMN: String = CalendarContract.Calendars.CAL_SYNC1
+
     const val IDX_ID = 0
     const val IDX_DISPLAY_NAME = 1
     const val IDX_ACCOUNT_NAME = 2
@@ -20,6 +26,7 @@ internal object CalendarProjection {
     const val IDX_COLOR = 4
     const val IDX_VISIBLE = 5
     const val IDX_ACCESS_LEVEL = 6
+    const val IDX_DESCRIPTION = 7
 }
 
 internal object InstanceProjection {

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

@@ -15,6 +15,17 @@ data class CalendarSource(
      * subscriptions, birthday calendars and other read-only sources.
      */
     val canModifyContents: Boolean = false,
+    /**
+     * A device-only calendar the app itself owns (`ACCOUNT_TYPE_LOCAL`): it has
+     * no sync backend, so the app can rename / recolor / delete it. Synced
+     * calendars (Google, DAVx5, …) are managed in their own source app instead.
+     */
+    val isLocal: Boolean = false,
+    /**
+     * Free-text note for a local calendar (stored in `CAL_SYNC1`, which the app
+     * owns for its own calendars). Always null for synced calendars.
+     */
+    val description: String? = null,
 )
 
 data class EventInstance(

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

@@ -16,6 +16,7 @@ import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import de.jeanlucmakiola.calendula.domain.EventInstance
+import de.jeanlucmakiola.calendula.ui.calendars.CalendarsScreen
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarSlideSpec
 import de.jeanlucmakiola.calendula.ui.day.DayScreen
@@ -86,13 +87,23 @@ fun CalendarHost(
     var showSettings by rememberSaveable { mutableStateOf(false) }
     val onOpenSettings = { showSettings = true }
 
+    // Calendar manager (reached from Settings) — its own overlay so it slides
+    // over Settings and survives view switches.
+    var showCalendars by rememberSaveable { mutableStateOf(false) }
+
     // Event form (v1.2 create) — same held-key pattern as the detail screen:
     // [heldCreateIso] keeps the prefill date alive through the slide-out.
+    // [createStartMinutes] is the tapped slot's start (minutes from midnight)
+    // when the form is opened from a day/week grid tap; null from the FAB.
     var createDateIso by rememberSaveable { mutableStateOf<String?>(null) }
     var heldCreateIso by remember { mutableStateOf<String?>(null) }
-    val onCreateEvent: (LocalDate) -> Unit = { date ->
+    var createStartMinutes by rememberSaveable { mutableStateOf<Int?>(null) }
+    var heldCreateMinutes by remember { mutableStateOf<Int?>(null) }
+    val onCreateEvent: (LocalDate, Int?) -> Unit = { date, startMinutes ->
         heldCreateIso = date.toString()
         createDateIso = date.toString()
+        heldCreateMinutes = startMinutes
+        createStartMinutes = startMinutes
     }
 
     // Edit form (v1.3) — reuses the detail screen's occurrence key; for
@@ -162,6 +173,7 @@ fun CalendarHost(
             (createDateIso ?: heldCreateIso)?.let { iso ->
                 EventEditScreen(
                     initialDateIso = iso,
+                    initialStartMinutes = createStartMinutes ?: heldCreateMinutes,
                     onClose = { createDateIso = null },
                     onSaved = { createDateIso = null },
                 )
@@ -193,7 +205,19 @@ fun CalendarHost(
             enter = slideInHorizontally(slideSpec) { it } + fadeIn(),
             exit = slideOutHorizontally(slideSpec) { it } + fadeOut(),
         ) {
-            SettingsScreen(onBack = { showSettings = false })
+            SettingsScreen(
+                onBack = { showSettings = false },
+                onManageCalendars = { showCalendars = true },
+            )
+        }
+
+        // Calendar manager — slides over Settings.
+        AnimatedVisibility(
+            visible = showCalendars,
+            enter = slideInHorizontally(slideSpec) { it } + fadeIn(),
+            exit = slideOutHorizontally(slideSpec) { it } + fadeOut(),
+        ) {
+            CalendarsScreen(onBack = { showCalendars = false })
         }
     }
 }

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

@@ -0,0 +1,546 @@
+package de.jeanlucmakiola.calendula.ui.calendars
+
+import android.accounts.AccountManager
+import android.content.Context
+import android.content.Intent
+import android.provider.Settings
+import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+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.ExperimentalLayoutApi
+import androidx.compose.foundation.layout.FlowRow
+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.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.filled.Add
+import androidx.compose.material.icons.filled.CalendarMonth
+import androidx.compose.material.icons.filled.Check
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material.icons.filled.Edit
+import androidx.compose.material.icons.filled.OpenInNew
+import androidx.compose.material.icons.filled.Palette
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Button
+import androidx.compose.material3.ExperimentalMaterial3Api
+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.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+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.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.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.KeyboardCapitalization
+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.domain.CalendarSource
+import de.jeanlucmakiola.calendula.ui.common.CalendarColorChip
+import de.jeanlucmakiola.calendula.ui.common.CollapsingScaffold
+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
+
+/** Sentinel [editorId] meaning "the editor is composing a new calendar". */
+private const val NEW_CALENDAR_ID = Long.MIN_VALUE
+
+/**
+ * Calendar manager (reached from Settings). Lists the app's own device-only
+ * calendars with create / rename / recolor / delete (via a full-screen editor),
+ * and lists synced calendars read-only with a per-account "manage in the source
+ * app" deep-link — the app never touches a synced calendar's server. A
+ * full-screen destination; [onBack] pops it.
+ */
+@Composable
+fun CalendarsScreen(
+    onBack: () -> Unit,
+    viewModel: CalendarsViewModel = hiltViewModel(),
+) {
+    val calendars by viewModel.calendars.collectAsStateWithLifecycle()
+    val error by viewModel.error.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
+    // a fresh open while still surviving configuration changes within one open.
+    var editorId by rememberSaveable { mutableStateOf<Long?>(null) }
+    var editorSession by rememberSaveable { mutableStateOf(0) }
+
+    if (editorId != null) {
+        val editing = calendars.firstOrNull { it.id == editorId }
+        CalendarEditor(
+            sessionKey = editorSession,
+            isNew = editorId == NEW_CALENDAR_ID,
+            initialName = editing?.displayName.orEmpty(),
+            initialColor = editing?.color ?: CALENDAR_COLOR_PALETTE.first(),
+            initialDescription = editing?.description.orEmpty(),
+            onSave = { name, color, description ->
+                val id = editorId
+                if (id == null || id == NEW_CALENDAR_ID) {
+                    viewModel.createCalendar(name, color, description)
+                } else {
+                    viewModel.updateCalendar(id, name, color, description)
+                }
+                editorId = null
+            },
+            onDelete = {
+                editorId?.takeIf { it != NEW_CALENDAR_ID }?.let(viewModel::deleteCalendar)
+                editorId = null
+            },
+            onClose = { editorId = null },
+        )
+    } else {
+        CalendarsList(
+            local = calendars.filter { it.isLocal },
+            synced = calendars.filterNot { it.isLocal },
+            error = error,
+            onConsumeError = viewModel::consumeError,
+            onBack = onBack,
+            onAdd = { editorSession++; editorId = NEW_CALENDAR_ID },
+            onEdit = { calendar -> editorSession++; editorId = calendar.id },
+        )
+    }
+}
+
+@Composable
+private fun CalendarsList(
+    local: List<CalendarSource>,
+    synced: List<CalendarSource>,
+    error: Boolean,
+    onConsumeError: () -> Unit,
+    onBack: () -> Unit,
+    onAdd: () -> Unit,
+    onEdit: (CalendarSource) -> Unit,
+) {
+    val context = LocalContext.current
+    val snackbarHostState = remember { SnackbarHostState() }
+    val writeErrorText = stringResource(R.string.calendars_write_error)
+
+    LaunchedEffect(error) {
+        if (error) {
+            snackbarHostState.showSnackbar(writeErrorText)
+            onConsumeError()
+        }
+    }
+
+    CollapsingScaffold(
+        title = stringResource(R.string.calendars_title),
+        onBack = onBack,
+        snackbarHost = { SnackbarHost(snackbarHostState) },
+    ) {
+        // 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
+        local.forEachIndexed { index, calendar ->
+            GroupedRow(
+                title = calendar.displayName,
+                summary = calendar.description,
+                position = positionOf(index, localCount),
+                leading = { CalendarColorChip(calendar.color) },
+                trailing = {
+                    Icon(
+                        Icons.Default.Edit,
+                        contentDescription = stringResource(R.string.calendars_edit_title),
+                        tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                        modifier = Modifier.size(20.dp),
+                    )
+                },
+                onClick = { onEdit(calendar) },
+            )
+        }
+        GroupedRow(
+            title = stringResource(R.string.calendars_add),
+            position = positionOf(local.size, localCount),
+            leading = { AddAvatar() },
+            onClick = onAdd,
+        )
+
+        Spacer(Modifier.height(16.dp))
+
+        // Synced calendars — read-only, grouped by account, each with a
+        // per-account "manage in source app" link.
+        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)
+                cals.forEachIndexed { index, calendar ->
+                    GroupedRow(
+                        title = calendar.displayName,
+                        position = positionOf(index, cals.size),
+                        leading = { CalendarColorChip(calendar.color) },
+                    )
+                }
+            }
+        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)) }
+            },
+        )
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun CalendarEditor(
+    sessionKey: Int,
+    isNew: Boolean,
+    initialName: String,
+    initialColor: Int,
+    initialDescription: String,
+    onSave: (name: String, color: Int, description: String?) -> Unit,
+    onDelete: () -> Unit,
+    onClose: () -> Unit,
+) {
+    var name by rememberSaveable(sessionKey) { mutableStateOf(initialName) }
+    var color by rememberSaveable(sessionKey) { mutableStateOf(initialColor) }
+    var description by rememberSaveable(sessionKey) { mutableStateOf(initialDescription) }
+    var confirmDelete by remember { mutableStateOf(false) }
+    val dark = isSystemInDarkTheme()
+
+    BackHandler(onBack = onClose)
+
+    Scaffold(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(MaterialTheme.colorScheme.surface),
+        topBar = {
+            TopAppBar(
+                title = {
+                    Text(
+                        stringResource(
+                            if (isNew) R.string.calendars_new_title
+                            else R.string.calendars_edit_title,
+                        ),
+                    )
+                },
+                navigationIcon = {
+                    IconButton(onClick = onClose) {
+                        Icon(
+                            Icons.Default.Close,
+                            contentDescription = stringResource(R.string.event_edit_close),
+                        )
+                    }
+                },
+                actions = {
+                    if (!isNew) {
+                        IconButton(onClick = { confirmDelete = true }) {
+                            Icon(
+                                Icons.Default.Delete,
+                                contentDescription = stringResource(R.string.event_detail_delete),
+                                tint = MaterialTheme.colorScheme.error,
+                            )
+                        }
+                    }
+                    // Filled save button, matching the event editor's top bar.
+                    Button(
+                        onClick = {
+                            onSave(name.trim(), color, description.trim().ifEmpty { null })
+                        },
+                        enabled = name.isNotBlank(),
+                        modifier = Modifier.padding(end = 12.dp),
+                    ) {
+                        Text(stringResource(R.string.event_edit_save))
+                    }
+                },
+                colors = TopAppBarDefaults.topAppBarColors(
+                    containerColor = MaterialTheme.colorScheme.surface,
+                ),
+            )
+        },
+    ) { innerPadding ->
+        Column(
+            modifier = Modifier
+                .padding(innerPadding)
+                .fillMaxSize()
+                .verticalScroll(rememberScrollState())
+                .padding(horizontal = 16.dp, vertical = 8.dp),
+            verticalArrangement = Arrangement.spacedBy(12.dp),
+        ) {
+            EditorCard(icon = Icons.Default.CalendarMonth, iconTint = pastelize(color, dark)) {
+                InlineTextField(
+                    value = name,
+                    onValueChange = { name = it },
+                    placeholder = stringResource(R.string.calendars_name_label),
+                    textStyle = MaterialTheme.typography.titleLarge,
+                    capitalization = KeyboardCapitalization.Sentences,
+                )
+            }
+            EditorCard(
+                icon = Icons.Default.Palette,
+                iconTint = MaterialTheme.colorScheme.onSurfaceVariant,
+                iconAtTop = true,
+            ) {
+                Text(
+                    text = stringResource(R.string.calendars_color_label),
+                    style = MaterialTheme.typography.labelLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                Spacer(Modifier.height(12.dp))
+                ColorPalette(selected = color, onSelect = { color = it }, dark = dark)
+            }
+            EditorCard(
+                icon = Icons.AutoMirrored.Filled.Notes,
+                iconTint = MaterialTheme.colorScheme.onSurfaceVariant,
+                iconAtTop = true,
+            ) {
+                InlineTextField(
+                    value = description,
+                    onValueChange = { description = it },
+                    placeholder = stringResource(R.string.calendars_description_hint),
+                    singleLine = false,
+                    minLines = 2,
+                    capitalization = KeyboardCapitalization.Sentences,
+                )
+            }
+        }
+    }
+
+    if (confirmDelete) {
+        AlertDialog(
+            onDismissRequest = { confirmDelete = false },
+            title = { Text(stringResource(R.string.calendars_delete_confirm_title)) },
+            text = {
+                Text(stringResource(R.string.calendars_delete_confirm_message, initialName))
+            },
+            confirmButton = {
+                TextButton(onClick = {
+                    confirmDelete = false
+                    onDelete()
+                }) {
+                    Text(
+                        stringResource(R.string.event_detail_delete),
+                        color = MaterialTheme.colorScheme.error,
+                    )
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = { confirmDelete = false }) {
+                    Text(stringResource(R.string.dialog_cancel))
+                }
+            },
+        )
+    }
+}
+
+/** Tonal field card matching the event editor's design (icon + content). */
+@Composable
+private fun EditorCard(
+    icon: ImageVector,
+    iconTint: Color,
+    iconAtTop: Boolean = false,
+    content: @Composable () -> Unit,
+) {
+    Surface(
+        color = MaterialTheme.colorScheme.surfaceContainerHigh,
+        shape = RoundedCornerShape(16.dp),
+        modifier = Modifier.fillMaxWidth(),
+    ) {
+        Row(
+            modifier = Modifier.padding(16.dp),
+            verticalAlignment = if (iconAtTop) Alignment.Top else Alignment.CenterVertically,
+        ) {
+            Icon(
+                imageVector = icon,
+                contentDescription = null,
+                tint = iconTint,
+                modifier = Modifier
+                    .padding(top = if (iconAtTop) 2.dp else 0.dp)
+                    .size(24.dp),
+            )
+            Spacer(Modifier.width(16.dp))
+            Column(modifier = Modifier.weight(1f)) { content() }
+        }
+    }
+}
+
+@OptIn(ExperimentalLayoutApi::class)
+@Composable
+private fun ColorPalette(selected: Int, onSelect: (Int) -> Unit, dark: Boolean) {
+    FlowRow(horizontalArrangement = Arrangement.spacedBy(12.dp)) {
+        CALENDAR_COLOR_PALETTE.forEach { argb ->
+            val isSelected = argb == selected
+            // Show the pastel the calendar will actually render as, not the raw hue.
+            Box(
+                contentAlignment = Alignment.Center,
+                modifier = Modifier
+                    .padding(vertical = 4.dp)
+                    .size(40.dp)
+                    .clip(CircleShape)
+                    .background(pastelize(argb, dark))
+                    .then(
+                        if (isSelected) {
+                            Modifier.border(2.dp, MaterialTheme.colorScheme.onSurface, CircleShape)
+                        } else {
+                            Modifier
+                        },
+                    )
+                    .clickable { onSelect(argb) },
+            ) {
+                if (isSelected) {
+                    Icon(
+                        Icons.Default.Check,
+                        contentDescription = null,
+                        tint = Color.Black.copy(alpha = 0.7f),
+                        modifier = Modifier.size(20.dp),
+                    )
+                }
+            }
+        }
+    }
+}
+
+@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,
+    ) {
+        Text(
+            text = account,
+            style = MaterialTheme.typography.titleSmall,
+            fontWeight = FontWeight.SemiBold,
+            modifier = Modifier.weight(1f),
+        )
+        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 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) {
+    Text(
+        text = text,
+        style = MaterialTheme.typography.labelLarge,
+        color = MaterialTheme.colorScheme.primary,
+        modifier = Modifier.padding(start = 24.dp, end = 24.dp, top = 16.dp, bottom = 4.dp),
+    )
+}
+
+@Composable
+private fun HintText(text: String) {
+    Text(
+        text = text,
+        style = MaterialTheme.typography.bodySmall,
+        color = MaterialTheme.colorScheme.onSurfaceVariant,
+        modifier = Modifier.padding(horizontal = 24.dp, vertical = 4.dp),
+    )
+}
+
+/**
+ * Pick the app to open for managing a synced calendar's account. The account's
+ * own authenticator package (resolved from [AccountManager], no permission
+ * needed) handles any sync provider — DAVx5, ICSx5, Nextcloud, … — and a small
+ * curated map redirects the few cases where the authenticator isn't the app to
+ * open (Google's authenticator is Play Services, but users want the Calendar
+ * app). Falls back to the system account settings when nothing launchable is
+ * found, so the button always lands somewhere sensible.
+ */
+private fun sourceAppIntent(context: Context, accountType: String): Intent {
+    val pm = context.packageManager
+    val candidates = buildList {
+        AccountManager.get(context).authenticatorTypes
+            .firstOrNull { it.type.equals(accountType, ignoreCase = true) }
+            ?.packageName
+            ?.let { add(it) }
+        curatedSourcePackage(accountType)?.let { add(it) }
+    }
+    for (pkg in candidates) {
+        pm.getLaunchIntentForPackage(pkg)?.let { return it }
+    }
+    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
+}
+
+/** Google-Calendar-style palette; values are ARGB ints for `Calendars.CALENDAR_COLOR`. */
+internal 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/calendars/CalendarsViewModel.kt

@@ -0,0 +1,71 @@
+package de.jeanlucmakiola.calendula.ui.calendars
+
+import androidx.lifecycle.ViewModel
+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.domain.CalendarSource
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.launch
+import kotlin.coroutines.cancellation.CancellationException
+import javax.inject.Inject
+
+/**
+ * Backs the calendar manager: lists every calendar (the screen splits them into
+ * the app's own local calendars and read-only/synced ones) and creates,
+ * renames, recolors or deletes the local calendars the app owns. Write failures
+ * flip [error] so the screen can surface a one-shot message.
+ */
+@HiltViewModel
+class CalendarsViewModel @Inject constructor(
+    private val repository: CalendarRepository,
+    @IoDispatcher private val io: CoroutineDispatcher,
+) : ViewModel() {
+
+    val calendars: StateFlow<List<CalendarSource>> =
+        repository.calendars()
+            .catch { emit(emptyList()) }
+            .flowOn(io)
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(5_000L),
+                initialValue = emptyList(),
+            )
+
+    private val _error = MutableStateFlow(false)
+    val error: StateFlow<Boolean> = _error.asStateFlow()
+
+    fun consumeError() { _error.value = false }
+
+    fun createCalendar(displayName: String, color: Int, description: String?) = write {
+        repository.createLocalCalendar(displayName, color, description)
+    }
+
+    fun updateCalendar(id: Long, displayName: String, color: Int, description: String?) = write {
+        repository.updateCalendar(id, displayName, color, description)
+    }
+
+    fun deleteCalendar(id: Long) = write {
+        repository.deleteCalendar(id)
+    }
+
+    private inline fun write(crossinline block: suspend () -> Unit) {
+        viewModelScope.launch {
+            try {
+                block()
+            } catch (e: CancellationException) {
+                throw e
+            } catch (e: Exception) {
+                _error.value = true
+            }
+        }
+    }
+}

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

@@ -1,6 +1,20 @@
 package de.jeanlucmakiola.calendula.ui.common
 
+import androidx.compose.foundation.background
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.CalendarMonth
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+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.
@@ -15,3 +29,27 @@ fun pastelize(rawArgb: Int, dark: Boolean): Color {
     hsv[2] = if (dark) 0.82f else 0.72f
     return Color(android.graphics.Color.HSVToColor(hsv))
 }
+
+/**
+ * Leading avatar for a calendar: a neutral chip holding a calendar glyph tinted
+ * in the calendar's (pastelised) colour. Shared by the calendar manager and the
+ * visibility filter so they read identically.
+ */
+@Composable
+fun CalendarColorChip(color: Int, modifier: Modifier = Modifier) {
+    val dark = isSystemInDarkTheme()
+    Box(
+        modifier = modifier
+            .size(40.dp)
+            .clip(CircleShape)
+            .background(MaterialTheme.colorScheme.surfaceContainerHighest),
+        contentAlignment = Alignment.Center,
+    ) {
+        Icon(
+            Icons.Filled.CalendarMonth,
+            contentDescription = null,
+            tint = pastelize(color, dark),
+            modifier = Modifier.size(22.dp),
+        )
+    }
+}

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

@@ -1,20 +1,33 @@
 package de.jeanlucmakiola.calendula.ui.common
 
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.requiredSize
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+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.Settings
-import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.ModalDrawerSheet
-import androidx.compose.material3.NavigationDrawerItem
 import androidx.compose.material3.Text
 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.res.colorResource
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import de.jeanlucmakiola.calendula.R
@@ -23,17 +36,12 @@ import de.jeanlucmakiola.calendula.ui.filter.CalendarFilterList
 /**
  * Navigation drawer shared by every top-level calendar screen.
  *
- * Visual language (kept deliberately small so sizes don't drift):
- *  - Drawer title — `titleLarge`
- *  - Section headers (e.g. "Calendars") — `titleSmall`, primary, text only
- *  - Nav items (the views, Today / Settings) — Material `NavigationDrawerItem`
- *    (`labelLarge` label + a single 24dp leading icon)
- *
- * The "View" section mirrors the top-bar switcher pill: tapping a view here
- * selects it (and closes the drawer) rather than cycling. Also hosts the
- * per-calendar visibility filter (M3) inline — the calendar list with its
- * checkboxes lives here rather than in a separate sheet — plus a Settings
- * entry (M4). The host screen owns the drawer state.
+ * Uses the app's grouped-card design system (see [GroupedRow]): a branded
+ * header, the View switcher as a grouped card (the active view highlighted),
+ * the per-calendar visibility filter (M3) inline, and a pinned Settings row.
+ * The "View" section mirrors the top-bar switcher pill — tapping a view here
+ * selects it (and closes the drawer) rather than cycling. The host screen owns
+ * the drawer state.
  */
 @Composable
 fun CalendarDrawer(
@@ -42,43 +50,72 @@ fun CalendarDrawer(
     onSettings: () -> Unit,
 ) {
     ModalDrawerSheet {
-        Column(Modifier.fillMaxHeight()) {
+        // The whole sidebar scrolls as one — header, views, the calendar filter
+        // and Settings all flow in a single scroll container.
+        Column(
+            Modifier
+                .fillMaxHeight()
+                .verticalScroll(rememberScrollState()),
+        ) {
+            DrawerHeader()
+
+            DrawerSectionHeader(stringResource(R.string.view_section))
+            IMPLEMENTED_VIEWS.forEachIndexed { index, view ->
+                GroupedRow(
+                    title = stringResource(view.labelRes),
+                    position = positionOf(index, IMPLEMENTED_VIEWS.size),
+                    selected = view == currentView,
+                    minHeight = 56.dp,
+                    leading = { Icon(view.icon, contentDescription = null) },
+                    onClick = { onSelectView(view) },
+                )
+            }
+
+            Spacer(Modifier.height(16.dp))
+
+            DrawerSectionHeader(stringResource(R.string.filter_title))
+            CalendarFilterList()
+
+            Spacer(Modifier.height(16.dp))
+            GroupedRow(
+                title = stringResource(R.string.month_action_settings),
+                position = Position.Alone,
+                minHeight = 56.dp,
+                leading = { Icon(Icons.Filled.Settings, contentDescription = null) },
+                onClick = onSettings,
+            )
+            Spacer(Modifier.height(8.dp))
+        }
+    }
+}
+
+/** Branded header: the app-icon chip beside the app name. */
+@Composable
+private fun DrawerHeader() {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(start = 28.dp, end = 28.dp, top = 24.dp, bottom = 16.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        Box(
+            modifier = Modifier
+                .size(44.dp)
+                .clip(RoundedCornerShape(14.dp))
+                .background(colorResource(R.color.ic_launcher_background)),
+            contentAlignment = Alignment.Center,
+        ) {
+            Image(
+                painter = painterResource(R.drawable.ic_launcher_foreground),
+                contentDescription = null,
+                modifier = Modifier.requiredSize(66.dp),
+            )
+        }
+        Spacer(Modifier.width(16.dp))
         Text(
             text = stringResource(R.string.app_name),
             style = MaterialTheme.typography.titleLarge,
-                modifier = Modifier.padding(horizontal = 28.dp, vertical = 24.dp),
         )
-            HorizontalDivider()
-
-            DrawerSectionHeader(stringResource(R.string.view_section))
-            IMPLEMENTED_VIEWS.forEach { view ->
-                NavigationDrawerItem(
-                    icon = { Icon(view.icon, contentDescription = null) },
-                    label = { Text(stringResource(view.labelRes)) },
-                    selected = view == currentView,
-                    onClick = { onSelectView(view) },
-                    modifier = Modifier.padding(horizontal = 12.dp),
-                )
-            }
-            Spacer(Modifier.height(8.dp))
-            HorizontalDivider()
-
-            // Calendars (M3) — visibility checkboxes, scrollable, takes the slack
-            // between the top actions and the pinned Settings entry.
-            DrawerSectionHeader(stringResource(R.string.filter_title))
-            CalendarFilterList(modifier = Modifier.weight(1f))
-
-            HorizontalDivider()
-            Spacer(Modifier.height(8.dp))
-            NavigationDrawerItem(
-                icon = { Icon(Icons.Filled.Settings, contentDescription = null) },
-                label = { Text(stringResource(R.string.month_action_settings)) },
-                selected = false,
-                onClick = onSettings,
-                modifier = Modifier.padding(horizontal = 12.dp),
-            )
-            Spacer(Modifier.height(8.dp))
-        }
     }
 }
 

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

@@ -0,0 +1,191 @@
+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.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.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)
+                .fillMaxSize()
+                .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/InlineTextField.kt

@@ -0,0 +1,74 @@
+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/day/DayScreen.kt

@@ -6,6 +6,7 @@ import androidx.compose.animation.core.animateDpAsState
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.gestures.detectHorizontalDragGestures
+import androidx.compose.foundation.gestures.detectTapGestures
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.BoxWithConstraints
@@ -104,7 +105,7 @@ fun DayScreen(
     onSelectView: (CalendarView) -> Unit,
     onEventClick: (EventInstance) -> Unit,
     onOpenSettings: () -> Unit,
-    onCreateEvent: (LocalDate) -> Unit,
+    onCreateEvent: (LocalDate, Int?) -> Unit,
     modifier: Modifier = Modifier,
     initialDateIso: String? = null,
     viewModel: DayViewModel = hiltViewModel(),
@@ -185,7 +186,7 @@ fun DayScreen(
                     todayVisible = !isOnToday,
                     todayText = stringResource(R.string.day_today_action),
                     onToday = jumpToToday,
-                    onCreate = { onCreateEvent(date) },
+                    onCreate = { onCreateEvent(date, null) },
                 )
             },
         ) { innerPadding ->
@@ -197,6 +198,7 @@ fun DayScreen(
                 onSwipePrev = goPrev,
                 onRetry = jumpToToday,
                 onEventClick = onEventClick,
+                onCreateAt = { d, minutes -> onCreateEvent(d, minutes) },
                 modifier = Modifier
                     .padding(innerPadding)
                     .fillMaxSize(),
@@ -214,6 +216,7 @@ private fun DayContent(
     onSwipePrev: () -> Unit,
     onRetry: () -> Unit,
     onEventClick: (EventInstance) -> Unit,
+    onCreateAt: (LocalDate, Int) -> Unit,
     modifier: Modifier = Modifier,
 ) {
     val density = LocalDensity.current
@@ -282,6 +285,7 @@ private fun DayContent(
                 scrollState = scrollState,
                 allDayHeight = allDayHeight,
                 onEventClick = onEventClick,
+                onCreateAt = onCreateAt,
             )
         }
     }
@@ -294,6 +298,7 @@ private fun DaySuccess(
     scrollState: ScrollState,
     allDayHeight: Dp,
     onEventClick: (EventInstance) -> Unit,
+    onCreateAt: (LocalDate, Int) -> Unit,
 ) {
     Column(modifier = Modifier.fillMaxSize()) {
         // All-day strip collapses to nothing when the day has no all-day events,
@@ -309,7 +314,12 @@ private fun DaySuccess(
         // Breathing room between the (colour-shifting) top section and the
         // scrolling timeline below.
         Spacer(Modifier.height(8.dp))
-        Timeline(state = state, scrollState = scrollState, onEventClick = onEventClick)
+        Timeline(
+            state = state,
+            scrollState = scrollState,
+            onEventClick = onEventClick,
+            onCreateAt = onCreateAt,
+        )
     }
 }
 
@@ -427,6 +437,7 @@ private fun Timeline(
     state: DayUiState.Success,
     scrollState: ScrollState,
     onEventClick: (EventInstance) -> Unit,
+    onCreateAt: (LocalDate, Int) -> Unit,
 ) {
     val totalHeight = HOUR_HEIGHT * 24
     val dark = isSystemInDarkTheme()
@@ -474,7 +485,9 @@ private fun Timeline(
                 DayColumnCard(
                     blocks = state.timed,
                     dark = dark,
+                    date = state.date,
                     onEventClick = onEventClick,
+                    onCreateAt = onCreateAt,
                     modifier = Modifier
                         .fillMaxWidth()
                         .height(totalHeight),
@@ -488,9 +501,12 @@ private fun Timeline(
 private fun DayColumnCard(
     blocks: List<TimedBlock>,
     dark: Boolean,
+    date: LocalDate,
     onEventClick: (EventInstance) -> Unit,
+    onCreateAt: (LocalDate, Int) -> Unit,
     modifier: Modifier = Modifier,
 ) {
+    val hourPx = with(LocalDensity.current) { HOUR_HEIGHT.toPx() }
     Card(
         // Plain rectangular column — the soft corners come from the outer
         // rounded scroll viewport, so inner rounding would look odd at the edges.
@@ -500,7 +516,19 @@ private fun DayColumnCard(
         ),
         modifier = modifier,
     ) {
-        BoxWithConstraints(modifier = Modifier.fillMaxSize()) {
+        BoxWithConstraints(
+            modifier = Modifier
+                .fillMaxSize()
+                // 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.
+                .pointerInput(date) {
+                    detectTapGestures { offset ->
+                        val hour = (offset.y / hourPx).toInt().coerceIn(0, 23)
+                        onCreateAt(date, hour * 60)
+                    }
+                },
+        ) {
             val colWidth = maxWidth
             blocks.forEach { block ->
                 val laneWidth = colWidth / block.laneCount

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

@@ -110,6 +110,7 @@ import de.jeanlucmakiola.calendula.domain.RecurringWriteScope
 import de.jeanlucmakiola.calendula.domain.SimpleRecurrence
 import de.jeanlucmakiola.calendula.domain.parseSimpleRecurrence
 import de.jeanlucmakiola.calendula.domain.toRRule
+import de.jeanlucmakiola.calendula.ui.common.InlineTextField
 import de.jeanlucmakiola.calendula.ui.common.OptionCard
 import de.jeanlucmakiola.calendula.ui.common.currentLocale
 import de.jeanlucmakiola.calendula.ui.common.pastelize
@@ -147,6 +148,7 @@ fun EventEditScreen(
     onClose: () -> Unit,
     onSaved: () -> Unit,
     editKey: LongArray? = null,
+    initialStartMinutes: Int? = null,
     viewModel: EventEditViewModel = hiltViewModel(),
 ) {
     LaunchedEffect(initialDateIso, editKey) {
@@ -159,7 +161,7 @@ fun EventEditScreen(
         } else {
             val date = initialDateIso?.let { runCatching { LocalDate.parse(it) }.getOrNull() }
                 ?: Clock.System.now().toLocalDateTime(TimeZone.currentSystemDefault()).date
-            viewModel.openNew(date)
+            viewModel.openNew(date, initialStartMinutes)
         }
     }
     val state by viewModel.state.collectAsStateWithLifecycle()
@@ -1436,8 +1438,9 @@ private fun EditCard(
 }
 
 /**
- * Borderless text input used inside the cards (and as the headline title) —
- * no underline, no outline, just the card's tonal surface behind it.
+ * Borderless text input used inside the cards (and as the headline title).
+ * Thin wrapper over the shared [InlineTextField] so the form and the rest of
+ * the app share one input style.
  */
 @Composable
 private fun InlineField(
@@ -1452,36 +1455,15 @@ private fun InlineField(
         .fillMaxWidth()
         .padding(vertical = 4.dp),
 ) {
-    val resolvedStyle = textStyle.copy(
-        color = if (textStyle.color.isSpecified) {
-            textStyle.color
-        } else {
-            MaterialTheme.colorScheme.onSurface
-        },
-    )
-    BasicTextField(
+    InlineTextField(
         value = value,
         onValueChange = onValueChange,
-        textStyle = resolvedStyle,
+        placeholder = placeholder,
+        modifier = modifier,
+        textStyle = textStyle,
         singleLine = singleLine,
         minLines = minLines,
-        keyboardOptions = KeyboardOptions(keyboardType = keyboardType),
-        cursorBrush = SolidColor(MaterialTheme.colorScheme.primary),
-        decorationBox = { innerTextField ->
-            Box {
-                if (value.isEmpty()) {
-                    // Clearly fainter than typed text, so a hint (e.g. the
-                    // "10" in the reminder amount) never reads as prefilled.
-                    Text(
-                        text = placeholder,
-                        style = resolvedStyle,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.5f),
-                    )
-                }
-                innerTextField()
-            }
-        },
-        modifier = modifier,
+        keyboardType = keyboardType,
     )
 }
 

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

@@ -138,21 +138,26 @@ class EventEditViewModel @Inject constructor(
         )
 
     /**
-     * Initialise a fresh form for a new event on [date]. No-op when a form is
-     * already open, so user input survives configuration changes; [reset]
-     * clears it when the screen closes.
+     * Initialise a fresh form for a new event on [date]. [startMinutes] (minutes
+     * from midnight) anchors the start when the form is opened by tapping a slot
+     * in the day/week grid; without it the default is the next full hour (today)
+     * or 09:00 (any other day). No-op when a form is already open, so user input
+     * survives configuration changes; [reset] clears it when the screen closes.
      */
-    fun openNew(date: LocalDate) {
+    fun openNew(date: LocalDate, startMinutes: Int? = null) {
         if (_form.value != null) return
         val zone = TimeZone.currentSystemDefault()
         val now = Clock.System.now()
-        val start = if (date == now.toLocalDateTime(zone).date) {
+        val start = when {
+            startMinutes != null ->
+                LocalDateTime(date, LocalTime(startMinutes / 60, startMinutes % 60))
+            date == now.toLocalDateTime(zone).date -> {
                 // Today: the next full hour (may roll into tomorrow before midnight).
                 val hourMillis = 3_600_000L
                 val rounded = (now.toEpochMilliseconds() / hourMillis + 1) * hourMillis
                 Instant.fromEpochMilliseconds(rounded).toLocalDateTime(zone)
-        } else {
-            LocalDateTime(date, LocalTime(9, 0))
+            }
+            else -> LocalDateTime(date, LocalTime(9, 0))
         }
         val end = (start.toInstant(zone) + 1.hours).toLocalDateTime(zone)
         _form.value = EventForm(calendarId = null, start = start, end = end)

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

@@ -1,25 +1,17 @@
 package de.jeanlucmakiola.calendula.ui.filter
 
 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.PaddingValues
-import androidx.compose.foundation.layout.Row
 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.lazy.LazyColumn
-import androidx.compose.foundation.lazy.items
-import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material3.Checkbox
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
-import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
@@ -28,7 +20,9 @@ import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.domain.FailureReason
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.calendula.ui.common.CalendarColorChip
+import de.jeanlucmakiola.calendula.ui.common.GroupedRow
+import de.jeanlucmakiola.calendula.ui.common.positionOf
 
 /**
  * Calendar-visibility filter (M3), rendered inline in the navigation drawer.
@@ -53,66 +47,43 @@ fun CalendarFilterList(
     }
 }
 
+/**
+ * Renders as a plain (non-scrolling) [Column] so it flows inside the drawer's
+ * single scroll container — the whole sidebar scrolls as one. Calendar counts
+ * are small, so a lazy list isn't needed.
+ */
 @Composable
 private fun FilterList(
     groups: List<AccountGroup>,
     onSetVisible: (Long, Boolean) -> Unit,
     modifier: Modifier = Modifier,
 ) {
-    val dark = isSystemInDarkTheme()
-    LazyColumn(
-        modifier = modifier.fillMaxWidth(),
-        contentPadding = PaddingValues(vertical = 4.dp),
-    ) {
+    Column(modifier = modifier.fillMaxWidth()) {
         groups.forEach { group ->
-            item(key = "header-${group.account}") {
             Text(
                 text = group.account,
                 style = MaterialTheme.typography.labelMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant,
                 modifier = Modifier.padding(start = 28.dp, end = 28.dp, top = 12.dp, bottom = 4.dp),
             )
-            }
-            items(group.calendars, key = { it.id }) { cal ->
-                CalendarToggleRow(
-                    row = cal,
-                    dark = dark,
+            group.calendars.forEachIndexed { index, cal ->
+                GroupedRow(
+                    title = cal.displayName,
+                    position = positionOf(index, group.calendars.size),
+                    minHeight = 56.dp,
+                    leading = { CalendarColorChip(cal.color) },
+                    trailing = {
+                        Checkbox(
+                            checked = cal.visible,
                             onCheckedChange = { onSetVisible(cal.id, it) },
                         )
-            }
-        }
-    }
-}
-
-@Composable
-private fun CalendarToggleRow(
-    row: CalendarRow,
-    dark: Boolean,
-    onCheckedChange: (Boolean) -> Unit,
-) {
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(horizontal = 28.dp, vertical = 6.dp),
-        verticalAlignment = Alignment.CenterVertically,
-        horizontalArrangement = Arrangement.spacedBy(16.dp),
-    ) {
-        Box(
-            modifier = Modifier
-                .size(14.dp)
-                .background(pastelize(row.color, dark), CircleShape),
-        )
-        Text(
-            text = row.displayName,
-            style = MaterialTheme.typography.bodyMedium,
-            modifier = Modifier.weight(1f),
-        )
-        Checkbox(
-            checked = row.visible,
-            onCheckedChange = onCheckedChange,
+                    },
+                    onClick = { onSetVisible(cal.id, !cal.visible) },
                 )
             }
         }
+    }
+}
 
 @Composable
 private fun FilterLoading(modifier: Modifier = Modifier) {

app/src/main/java/de/jeanlucmakiola/calendula/ui/month/MonthScreen.kt

@@ -86,7 +86,7 @@ fun MonthScreen(
     onSelectView: (CalendarView) -> Unit,
     onOpenDay: (LocalDate) -> Unit,
     onOpenSettings: () -> Unit,
-    onCreateEvent: (LocalDate) -> Unit,
+    onCreateEvent: (LocalDate, Int?) -> Unit,
     modifier: Modifier = Modifier,
     viewModel: MonthViewModel = hiltViewModel(),
 ) {
@@ -166,6 +166,7 @@ fun MonthScreen(
                         onCreateEvent(
                             if (isOnCurrentMonth) today
                             else LocalDate(month.year, month.month, 1),
+                            null,
                         )
                     },
                 )

app/src/main/java/de/jeanlucmakiola/calendula/ui/settings/SettingsScreen.kt

@@ -1,264 +1,436 @@
 package de.jeanlucmakiola.calendula.ui.settings
 
 import android.Manifest
+import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.os.Build
-import androidx.activity.compose.BackHandler
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
-import androidx.core.net.toUri
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
+import androidx.compose.animation.slideInHorizontally
+import androidx.compose.animation.slideOutHorizontally
+import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
-import androidx.compose.foundation.clickable
 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.requiredSize
+import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.rememberScrollState
-import androidx.compose.foundation.verticalScroll
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.filled.ArrowBack
-import androidx.compose.material.icons.filled.ArrowDropDown
-import androidx.compose.material3.DropdownMenu
-import androidx.compose.material3.DropdownMenuItem
-import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material.icons.filled.CalendarMonth
+import androidx.compose.material.icons.filled.Gavel
+import androidx.compose.material.icons.filled.Language
+import androidx.compose.material.icons.filled.Notifications
+import androidx.compose.material.icons.filled.Palette
+import androidx.compose.material.icons.filled.Tune
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Scaffold
+import androidx.compose.material3.OutlinedButton
+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
 import androidx.compose.runtime.Composable
 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.draw.clip
+import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.colorResource
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.core.content.ContextCompat
+import androidx.core.net.toUri
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.data.prefs.ThemeMode
 import de.jeanlucmakiola.calendula.data.prefs.WeekStartPref
 import de.jeanlucmakiola.calendula.domain.EventFormField
+import de.jeanlucmakiola.calendula.ui.common.CollapsingScaffold
+import de.jeanlucmakiola.calendula.ui.common.GroupedRow
+import de.jeanlucmakiola.calendula.ui.common.OptionCard
+import de.jeanlucmakiola.calendula.ui.common.Position
+import de.jeanlucmakiola.calendula.ui.common.positionOf
+import de.jeanlucmakiola.calendula.ui.common.rememberCalendarSlideSpec
+
+/** The settings sub-screens reached from the hub's category rows. */
+private enum class SettingsSection { Appearance, EventForm, Notifications }
 
 /**
- * Settings (M4) — appearance (theme, dynamic colour, week start), language,
- * and an about section. A full-screen destination; [onBack] pops it.
+ * Token-based accent for a leading icon chip (container / on-container pair).
+ * Neutral chips stay grey; accents are drawn from the M3 scheme so they adapt
+ * to theme, dark mode and dynamic colour.
+ */
+private enum class ChipAccent { Neutral, Primary, Tertiary }
+
+/**
+ * Settings (M4), restructured in v2.3 into a category hub with sub-screens.
+ * Both the hub and the sub-screens use a collapsing [LargeTopAppBar] and the
+ * grouped-row card system. Calendars opens the separate manager hoisted in
+ * [CalendarHost]; Language opens an inline OptionCard dialog; About is a card
+ * at the top. A full-screen destination; [onBack] pops it.
  */
-@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun SettingsScreen(
     onBack: () -> Unit,
+    onManageCalendars: () -> Unit,
     modifier: Modifier = Modifier,
     viewModel: SettingsViewModel = hiltViewModel(),
 ) {
     val state by viewModel.state.collectAsStateWithLifecycle()
+    var section by rememberSaveable { mutableStateOf<SettingsSection?>(null) }
+    val slideSpec = rememberCalendarSlideSpec()
 
-    // Intercept the system back button/gesture — without this it falls through
-    // to the activity and closes the app instead of returning to the calendar.
-    BackHandler { onBack() }
-
-    Scaffold(
+    Box(
         modifier = modifier
             .fillMaxSize()
             .background(MaterialTheme.colorScheme.surface),
-        topBar = {
-            TopAppBar(
-                title = { Text(stringResource(R.string.settings_title)) },
-                navigationIcon = {
-                    IconButton(onClick = onBack) {
-                        Icon(
-                            Icons.AutoMirrored.Filled.ArrowBack,
-                            contentDescription = stringResource(R.string.settings_back),
-                        )
-                    }
-                },
-            )
-        },
-    ) { innerPadding ->
-        Column(
-            modifier = Modifier
-                .padding(innerPadding)
-                .fillMaxSize()
-                .verticalScroll(rememberScrollState()),
     ) {
-            SectionHeader(stringResource(R.string.settings_section_appearance))
-
-            SettingDropdownRow(
-                title = stringResource(R.string.settings_theme),
-                selected = state.themeMode,
-                options = ThemeMode.entries,
-                optionLabel = { themeLabel(it) },
-                onSelect = viewModel::setThemeMode,
-            )
-            DynamicColorRow(
-                checked = state.dynamicColor,
-                enabled = state.dynamicColorAvailable,
-                onCheckedChange = viewModel::setDynamicColor,
-            )
-            SettingDropdownRow(
-                title = stringResource(R.string.settings_week_start),
-                selected = state.weekStart,
-                options = WeekStartPref.entries,
-                optionLabel = { weekStartLabel(it) },
-                onSelect = viewModel::setWeekStart,
+        SettingsHub(
+            onBack = onBack,
+            onOpenSection = { section = it },
+            onManageCalendars = onManageCalendars,
         )
 
-            HorizontalDivider(Modifier.padding(vertical = 8.dp))
-            SectionHeader(stringResource(R.string.settings_section_event_form))
-            Text(
-                text = stringResource(R.string.settings_form_fields_hint),
-                style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
-                modifier = Modifier.padding(horizontal = 24.dp),
-            )
-            EventFormField.entries.forEach { field ->
-                FormFieldRow(
-                    title = stringResource(formFieldLabel(field)),
-                    checked = field in state.defaultFormFields,
-                    onCheckedChange = { viewModel.setFormFieldDefault(field, it) },
-                )
+        AnimatedVisibility(
+            visible = section == SettingsSection.Appearance,
+            enter = slideInHorizontally(slideSpec) { it } + fadeIn(),
+            exit = slideOutHorizontally(slideSpec) { it } + fadeOut(),
+        ) {
+            AppearanceScreen(state = state, viewModel = viewModel, onBack = { section = null })
+        }
+        AnimatedVisibility(
+            visible = section == SettingsSection.EventForm,
+            enter = slideInHorizontally(slideSpec) { it } + fadeIn(),
+            exit = slideOutHorizontally(slideSpec) { it } + fadeOut(),
+        ) {
+            EventFormScreen(state = state, viewModel = viewModel, onBack = { section = null })
+        }
+        AnimatedVisibility(
+            visible = section == SettingsSection.Notifications,
+            enter = slideInHorizontally(slideSpec) { it } + fadeIn(),
+            exit = slideOutHorizontally(slideSpec) { it } + fadeOut(),
+        ) {
+            NotificationsScreen(state = state, viewModel = viewModel, onBack = { section = null })
+        }
+    }
 }
 
-            HorizontalDivider(Modifier.padding(vertical = 8.dp))
-            SectionHeader(stringResource(R.string.settings_section_notifications))
-            RemindersRow(
-                checked = state.remindersEnabled,
-                onCheckedChange = viewModel::setRemindersEnabled,
+// ---------------------------------------------------------------------------
+// Hub
+// ---------------------------------------------------------------------------
+
+@Composable
+private fun SettingsHub(
+    onBack: () -> Unit,
+    onOpenSection: (SettingsSection) -> Unit,
+    onManageCalendars: () -> Unit,
+) {
+    CollapsingScaffold(title = stringResource(R.string.settings_title), onBack = onBack) {
+        Box(Modifier.padding(horizontal = 16.dp)) { AboutCard() }
+        Spacer(Modifier.height(16.dp))
+
+        GroupedRow(
+            title = stringResource(R.string.settings_section_appearance),
+            summary = stringResource(R.string.settings_appearance_subtitle),
+            position = Position.Top,
+            leading = { CategoryIcon(Icons.Default.Palette, ChipAccent.Neutral) },
+            onClick = { onOpenSection(SettingsSection.Appearance) },
         )
+        GroupedRow(
+            title = stringResource(R.string.settings_section_event_form),
+            summary = stringResource(R.string.settings_event_form_subtitle),
+            position = Position.Middle,
+            leading = { CategoryIcon(Icons.Default.Tune, ChipAccent.Neutral) },
+            onClick = { onOpenSection(SettingsSection.EventForm) },
+        )
+        GroupedRow(
+            title = stringResource(R.string.settings_section_notifications),
+            summary = stringResource(R.string.settings_notifications_subtitle),
+            position = Position.Middle,
+            leading = { CategoryIcon(Icons.Default.Notifications, ChipAccent.Primary) },
+            onClick = { onOpenSection(SettingsSection.Notifications) },
+        )
+        GroupedRow(
+            title = stringResource(R.string.settings_section_calendars),
+            summary = stringResource(R.string.settings_manage_calendars_hint),
+            position = Position.Middle,
+            leading = { CategoryIcon(Icons.Default.CalendarMonth, ChipAccent.Tertiary) },
+            onClick = onManageCalendars,
+        )
+        LanguageRow(position = Position.Bottom)
 
-            HorizontalDivider(Modifier.padding(vertical = 8.dp))
-            SectionHeader(stringResource(R.string.settings_section_language))
-            LanguageRow()
-
-            HorizontalDivider(Modifier.padding(vertical = 8.dp))
-            SectionHeader(stringResource(R.string.settings_section_about))
-            AboutSection()
-            Spacer(Modifier.height(24.dp))
-        }
+        AppVersionText()
     }
 }
 
 @Composable
-private fun LanguageRow() {
+private fun LanguageRow(position: Position) {
     // Setting a locale recreates the activity; mirror the choice locally so the
-    // dropdown updates instantly even before the recreation lands.
+    // row updates instantly even before the recreation lands.
     var current by remember { mutableStateOf(AppLanguage.current()) }
-    SettingDropdownRow(
+    var showDialog by remember { mutableStateOf(false) }
+
+    GroupedRow(
+        title = stringResource(R.string.settings_language),
+        summary = languageLabel(current),
+        position = position,
+        leading = { CategoryIcon(Icons.Default.Language, ChipAccent.Neutral) },
+        onClick = { showDialog = true },
+    )
+
+    if (showDialog) {
+        OptionPickerDialog(
             title = stringResource(R.string.settings_language),
-        selected = current,
             options = LanguagePref.entries,
-        optionLabel = { languageLabel(it) },
+            selected = current,
+            label = { languageLabel(it) },
             onSelect = {
                 current = it
                 AppLanguage.apply(it)
             },
+            onDismiss = { showDialog = false },
         )
     }
+}
 
 @Composable
-private fun SectionHeader(text: String) {
-    Text(
-        text = text,
-        style = MaterialTheme.typography.labelLarge,
-        color = MaterialTheme.colorScheme.primary,
-        modifier = Modifier.padding(start = 24.dp, end = 24.dp, top = 16.dp, bottom = 4.dp),
-    )
-}
+private fun AboutCard() {
+    val context = LocalContext.current
+    val sourceUrl = stringResource(R.string.about_source_url)
+    val licenseUrl = stringResource(R.string.about_license_url)
 
-@Composable
-private fun <T> SettingDropdownRow(
-    title: String,
-    selected: T,
-    options: List<T>,
-    optionLabel: @Composable (T) -> String,
-    onSelect: (T) -> Unit,
+    Surface(
+        color = MaterialTheme.colorScheme.surfaceContainerHigh,
+        shape = RoundedCornerShape(24.dp),
+        modifier = Modifier.fillMaxWidth(),
     ) {
-    var expanded by remember { mutableStateOf(false) }
-    Box {
-        Row(
+        Column(
             modifier = Modifier
                 .fillMaxWidth()
-                .clickable { expanded = true }
-                .padding(horizontal = 24.dp, vertical = 16.dp),
-            verticalAlignment = Alignment.CenterVertically,
+                .padding(16.dp),
         ) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                AppLogo()
+                Spacer(Modifier.width(16.dp))
+                Column(Modifier.weight(1f)) {
                     Text(
-                text = title,
-                style = MaterialTheme.typography.bodyLarge,
-                modifier = Modifier.weight(1f),
+                        text = stringResource(R.string.app_name),
+                        style = MaterialTheme.typography.titleLarge,
                     )
                     Text(
-                text = optionLabel(selected),
+                        text = stringResource(R.string.settings_about_author),
                         style = MaterialTheme.typography.bodyMedium,
                         color = MaterialTheme.colorScheme.onSurfaceVariant,
                     )
-            Icon(
-                Icons.Default.ArrowDropDown,
-                contentDescription = null,
-                tint = MaterialTheme.colorScheme.onSurfaceVariant,
-            )
                 }
-        DropdownMenu(expanded = expanded, onDismissRequest = { expanded = false }) {
-            options.forEach { option ->
-                DropdownMenuItem(
-                    text = { Text(optionLabel(option)) },
-                    onClick = {
-                        expanded = false
-                        onSelect(option)
-                    },
+            }
+            Spacer(Modifier.height(12.dp))
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                OutlinedButton(
+                    onClick = { openUrl(context, sourceUrl) },
+                    contentPadding = PaddingValues(horizontal = 12.dp),
+                    modifier = Modifier.weight(1f),
+                ) {
+                    Icon(
+                        painter = painterResource(R.drawable.ic_gitea),
+                        contentDescription = null,
+                        modifier = Modifier.size(18.dp),
                     )
+                    Spacer(Modifier.width(8.dp))
+                    Text(stringResource(R.string.settings_about_source))
+                }
+                OutlinedButton(
+                    onClick = { openUrl(context, licenseUrl) },
+                    contentPadding = PaddingValues(horizontal = 12.dp),
+                    modifier = Modifier.weight(1f),
+                ) {
+                    Icon(
+                        Icons.Default.Gavel,
+                        contentDescription = null,
+                        modifier = Modifier.size(18.dp),
+                    )
+                    Spacer(Modifier.width(8.dp))
+                    Text(stringResource(R.string.settings_license))
+                }
             }
         }
     }
 }
 
+/** Plain centred version mark at the foot of the settings list (no card). */
 @Composable
-private fun DynamicColorRow(
-    checked: Boolean,
-    enabled: Boolean,
-    onCheckedChange: (Boolean) -> Unit,
-) {
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(horizontal = 24.dp, vertical = 12.dp),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
-        Column(Modifier.weight(1f)) {
+private fun AppVersionText() {
+    val context = LocalContext.current
+    val versionName = remember {
+        runCatching {
+            context.packageManager.getPackageInfo(context.packageName, 0).versionName
+        }.getOrNull() ?: "—"
+    }
     Text(
-                text = stringResource(R.string.settings_dynamic_color),
-                style = MaterialTheme.typography.bodyLarge,
-                color = if (enabled) MaterialTheme.colorScheme.onSurface
-                else MaterialTheme.colorScheme.onSurfaceVariant,
-            )
-            if (!enabled) {
-                Text(
-                    text = stringResource(R.string.settings_dynamic_color_unavailable),
+        text = stringResource(R.string.settings_about_version, versionName),
         style = MaterialTheme.typography.bodySmall,
         color = MaterialTheme.colorScheme.onSurfaceVariant,
+        textAlign = TextAlign.Center,
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(vertical = 16.dp),
+    )
+}
+
+/**
+ * The app icon as a rounded chip: the off-white launcher mark over its slate
+ * background colour, rendered oversized and clipped to fill the chip the way a
+ * launcher mask would.
+ */
+@Composable
+private fun AppLogo() {
+    Box(
+        modifier = Modifier
+            .size(72.dp)
+            .clip(RoundedCornerShape(20.dp))
+            .background(colorResource(R.color.ic_launcher_background)),
+        contentAlignment = Alignment.Center,
+    ) {
+        Image(
+            painter = painterResource(R.drawable.ic_launcher_foreground),
+            contentDescription = stringResource(R.string.settings_about_logo_desc),
+            modifier = Modifier.requiredSize(108.dp),
         )
     }
 }
+
+// ---------------------------------------------------------------------------
+// Sub-screens
+// ---------------------------------------------------------------------------
+
+@Composable
+private fun AppearanceScreen(
+    state: SettingsUiState,
+    viewModel: SettingsViewModel,
+    onBack: () -> Unit,
+) {
+    var showTheme by remember { mutableStateOf(false) }
+    var showWeekStart by remember { mutableStateOf(false) }
+
+    CollapsingScaffold(
+        title = stringResource(R.string.settings_section_appearance),
+        onBack = onBack,
+    ) {
+        GroupedRow(
+            title = stringResource(R.string.settings_theme),
+            summary = themeLabel(state.themeMode),
+            position = Position.Top,
+            onClick = { showTheme = true },
+        )
+        GroupedRow(
+            title = stringResource(R.string.settings_dynamic_color),
+            summary = if (state.dynamicColorAvailable) {
+                null
+            } else {
+                stringResource(R.string.settings_dynamic_color_unavailable)
+            },
+            position = Position.Middle,
+            trailing = {
+                Switch(
+                    checked = state.dynamicColor,
+                    onCheckedChange = viewModel::setDynamicColor,
+                    enabled = state.dynamicColorAvailable,
+                )
+            },
+            onClick = if (state.dynamicColorAvailable) {
+                { viewModel.setDynamicColor(!state.dynamicColor) }
+            } else {
+                null
+            },
+        )
+        GroupedRow(
+            title = stringResource(R.string.settings_week_start),
+            summary = weekStartLabel(state.weekStart),
+            position = Position.Bottom,
+            onClick = { showWeekStart = true },
+        )
+    }
+
+    if (showTheme) {
+        OptionPickerDialog(
+            title = stringResource(R.string.settings_theme),
+            options = ThemeMode.entries,
+            selected = state.themeMode,
+            label = { themeLabel(it) },
+            onSelect = viewModel::setThemeMode,
+            onDismiss = { showTheme = false },
+        )
+    }
+    if (showWeekStart) {
+        OptionPickerDialog(
+            title = stringResource(R.string.settings_week_start),
+            options = WeekStartPref.entries,
+            selected = state.weekStart,
+            label = { weekStartLabel(it) },
+            onSelect = viewModel::setWeekStart,
+            onDismiss = { showWeekStart = false },
+        )
+    }
+}
+
+@Composable
+private fun EventFormScreen(
+    state: SettingsUiState,
+    viewModel: SettingsViewModel,
+    onBack: () -> Unit,
+) {
+    CollapsingScaffold(
+        title = stringResource(R.string.settings_section_event_form),
+        onBack = onBack,
+    ) {
+        Text(
+            text = stringResource(R.string.settings_form_fields_hint),
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(horizontal = 16.dp, vertical = 4.dp),
+        )
+        Spacer(Modifier.height(8.dp))
+        val fields = EventFormField.entries
+        fields.forEachIndexed { index, field ->
+            val checked = field in state.defaultFormFields
+            GroupedRow(
+                title = stringResource(formFieldLabel(field)),
+                position = positionOf(index, fields.size),
+                trailing = {
                     Switch(
                         checked = checked,
-            onCheckedChange = onCheckedChange,
-            enabled = enabled,
+                        onCheckedChange = { viewModel.setFormFieldDefault(field, it) },
                     )
+                },
+                onClick = { viewModel.setFormFieldDefault(field, !checked) },
+            )
+        }
     }
 }
 
@@ -268,36 +440,17 @@ private fun DynamicColorRow(
  * the pref is set either way; the OS permission is the real gate.
  */
 @Composable
-private fun RemindersRow(
-    checked: Boolean,
-    onCheckedChange: (Boolean) -> Unit,
+private fun NotificationsScreen(
+    state: SettingsUiState,
+    viewModel: SettingsViewModel,
+    onBack: () -> Unit,
 ) {
     val context = LocalContext.current
     val launcher = rememberLauncherForActivityResult(
         contract = ActivityResultContracts.RequestPermission(),
     ) { /* The pref is already on; a denial just leaves the OS gate shut. */ }
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(horizontal = 24.dp, vertical = 12.dp),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
-        Column(Modifier.weight(1f)) {
-            Text(
-                text = stringResource(R.string.settings_reminders),
-                style = MaterialTheme.typography.bodyLarge,
-            )
-            Text(
-                text = stringResource(R.string.settings_reminders_hint),
-                style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
-            )
-        }
-        Spacer(Modifier.width(16.dp))
-        Switch(
-            checked = checked,
-            onCheckedChange = { enabled ->
-                onCheckedChange(enabled)
+    val toggleReminders: (Boolean) -> Unit = { enabled ->
+        viewModel.setRemindersEnabled(enabled)
         val needsPermission = enabled &&
             Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU &&
             ContextCompat.checkSelfPermission(
@@ -306,96 +459,93 @@ private fun RemindersRow(
         if (needsPermission) {
             launcher.launch(Manifest.permission.POST_NOTIFICATIONS)
         }
+    }
+
+    CollapsingScaffold(
+        title = stringResource(R.string.settings_section_notifications),
+        onBack = onBack,
+    ) {
+        GroupedRow(
+            title = stringResource(R.string.settings_reminders),
+            summary = stringResource(R.string.settings_reminders_hint),
+            position = Position.Alone,
+            trailing = {
+                Switch(checked = state.remindersEnabled, onCheckedChange = toggleReminders)
+            },
+            onClick = { toggleReminders(!state.remindersEnabled) },
+        )
+    }
+}
+
+// ---------------------------------------------------------------------------
+// Shared building blocks
+// ---------------------------------------------------------------------------
+
+/**
+ * Leading circular icon chip. Colours come from the M3 scheme via a container /
+ * on-container token pair, so each accent stays correctly paired across theme,
+ * dark mode and dynamic colour.
+ */
+@Composable
+private fun CategoryIcon(icon: ImageVector, accent: ChipAccent) {
+    val scheme = MaterialTheme.colorScheme
+    val (background, iconColor) = when (accent) {
+        ChipAccent.Neutral -> scheme.surfaceContainerHighest to scheme.onSurfaceVariant
+        ChipAccent.Primary -> scheme.primaryContainer to scheme.onPrimaryContainer
+        ChipAccent.Tertiary -> scheme.tertiaryContainer to scheme.onTertiaryContainer
+    }
+    Box(
+        modifier = Modifier
+            .size(40.dp)
+            .clip(CircleShape)
+            .background(background),
+        contentAlignment = Alignment.Center,
+    ) {
+        Icon(
+            imageVector = icon,
+            contentDescription = null,
+            tint = iconColor,
+            modifier = Modifier.size(22.dp),
+        )
+    }
+}
+
+/** OptionCard selection dialog — the app's only sanctioned picker style. */
+@Composable
+private fun <T> OptionPickerDialog(
+    title: String,
+    options: List<T>,
+    selected: T,
+    label: @Composable (T) -> String,
+    onSelect: (T) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(title) },
+        text = {
+            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                options.forEach { option ->
+                    OptionCard(
+                        label = label(option),
+                        onClick = {
+                            onSelect(option)
+                            onDismiss()
+                        },
+                        selected = option == selected,
+                    )
+                }
+            }
+        },
+        confirmButton = {
+            TextButton(onClick = onDismiss) { Text(stringResource(R.string.dialog_cancel)) }
         },
     )
 }
-}
 
-@Composable
-private fun AboutSection() {
-    val context = LocalContext.current
-    val versionName = remember {
-        runCatching {
-            context.packageManager.getPackageInfo(context.packageName, 0).versionName
-        }.getOrNull() ?: "—"
-    }
-    val sourceUrl = stringResource(R.string.about_source_url)
-
-    AboutRow(
-        title = stringResource(R.string.settings_version),
-        value = versionName,
-    )
-    AboutRow(
-        title = stringResource(R.string.settings_license),
-        value = stringResource(R.string.settings_license_value),
-    )
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(horizontal = 16.dp, vertical = 4.dp),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
-        Column(Modifier.weight(1f).padding(start = 8.dp)) {
-            Text(
-                text = stringResource(R.string.settings_source),
-                style = MaterialTheme.typography.bodyLarge,
-            )
-            Text(
-                text = sourceUrl.removePrefix("https://"),
-                style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
-            )
-        }
-        TextButton(onClick = {
-            val intent = Intent(Intent.ACTION_VIEW, sourceUrl.toUri())
+private fun openUrl(context: Context, url: String) {
+    val intent = Intent(Intent.ACTION_VIEW, url.toUri())
     runCatching { context.startActivity(intent) }
-        }) {
-            Text(stringResource(R.string.settings_source_open))
-        }
-    }
-}
-
-@Composable
-private fun AboutRow(title: String, value: String) {
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(horizontal = 24.dp, vertical = 12.dp),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
-        Text(
-            text = title,
-            style = MaterialTheme.typography.bodyLarge,
-            modifier = Modifier.weight(1f),
-        )
-        Text(
-            text = value,
-            style = MaterialTheme.typography.bodyMedium,
-            color = MaterialTheme.colorScheme.onSurfaceVariant,
-        )
-        Spacer(Modifier.width(8.dp))
-    }
-}
-
-@Composable
-private fun FormFieldRow(
-    title: String,
-    checked: Boolean,
-    onCheckedChange: (Boolean) -> Unit,
-) {
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(horizontal = 24.dp, vertical = 8.dp),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
-        Text(
-            text = title,
-            style = MaterialTheme.typography.bodyLarge,
-            modifier = Modifier.weight(1f),
-        )
-        Switch(checked = checked, onCheckedChange = onCheckedChange)
-    }
 }
 
 private fun formFieldLabel(field: EventFormField): Int = when (field) {

app/src/main/java/de/jeanlucmakiola/calendula/ui/week/WeekScreen.kt

@@ -6,6 +6,7 @@ import androidx.compose.animation.core.animateDpAsState
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.gestures.detectHorizontalDragGestures
+import androidx.compose.foundation.gestures.detectTapGestures
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
@@ -112,7 +113,7 @@ fun WeekScreen(
     onSelectView: (CalendarView) -> Unit,
     onEventClick: (EventInstance) -> Unit,
     onOpenSettings: () -> Unit,
-    onCreateEvent: (LocalDate) -> Unit,
+    onCreateEvent: (LocalDate, Int?) -> Unit,
     modifier: Modifier = Modifier,
     viewModel: WeekViewModel = hiltViewModel(),
 ) {
@@ -194,7 +195,7 @@ fun WeekScreen(
                         // Anchor on today when it's in view, else the week's first day.
                         val today = Clock.System.now()
                             .toLocalDateTime(TimeZone.currentSystemDefault()).date
-                        onCreateEvent(if (isOnCurrentWeek) today else weekStart)
+                        onCreateEvent(if (isOnCurrentWeek) today else weekStart, null)
                     },
                 )
             },
@@ -207,6 +208,7 @@ fun WeekScreen(
                 onSwipePrev = goPrev,
                 onRetry = jumpToToday,
                 onEventClick = onEventClick,
+                onCreateAt = { d, minutes -> onCreateEvent(d, minutes) },
                 modifier = Modifier
                     .padding(innerPadding)
                     .fillMaxSize(),
@@ -224,6 +226,7 @@ private fun WeekContent(
     onSwipePrev: () -> Unit,
     onRetry: () -> Unit,
     onEventClick: (EventInstance) -> Unit,
+    onCreateAt: (LocalDate, Int) -> Unit,
     modifier: Modifier = Modifier,
 ) {
     val density = LocalDensity.current
@@ -295,6 +298,7 @@ private fun WeekContent(
                 scrollState = scrollState,
                 allDayHeight = allDayHeight,
                 onEventClick = onEventClick,
+                onCreateAt = onCreateAt,
             )
         }
     }
@@ -307,6 +311,7 @@ private fun WeekSuccess(
     scrollState: ScrollState,
     allDayHeight: Dp,
     onEventClick: (EventInstance) -> Unit,
+    onCreateAt: (LocalDate, Int) -> Unit,
 ) {
     Column(modifier = Modifier.fillMaxSize()) {
         Column(
@@ -320,7 +325,12 @@ private fun WeekSuccess(
         // Breathing room between the (colour-shifting) top section and the
         // scrolling timeline below.
         Spacer(Modifier.height(8.dp))
-        Timeline(state = state, scrollState = scrollState, onEventClick = onEventClick)
+        Timeline(
+            state = state,
+            scrollState = scrollState,
+            onEventClick = onEventClick,
+            onCreateAt = onCreateAt,
+        )
     }
 }
 
@@ -533,6 +543,7 @@ private fun Timeline(
     state: WeekUiState.Success,
     scrollState: ScrollState,
     onEventClick: (EventInstance) -> Unit,
+    onCreateAt: (LocalDate, Int) -> Unit,
 ) {
     val totalHeight = HOUR_HEIGHT * 24
     val dark = isSystemInDarkTheme()
@@ -588,7 +599,9 @@ private fun Timeline(
                         DayColumnCard(
                             blocks = state.timedByDay[day].orEmpty(),
                             dark = dark,
+                            date = day,
                             onEventClick = onEventClick,
+                            onCreateAt = onCreateAt,
                             modifier = Modifier
                                 .weight(1f)
                                 .fillMaxHeight(),
@@ -604,9 +617,12 @@ private fun Timeline(
 private fun DayColumnCard(
     blocks: List<TimedBlock>,
     dark: Boolean,
+    date: LocalDate,
     onEventClick: (EventInstance) -> Unit,
+    onCreateAt: (LocalDate, Int) -> Unit,
     modifier: Modifier = Modifier,
 ) {
+    val hourPx = with(LocalDensity.current) { HOUR_HEIGHT.toPx() }
     Card(
         // Plain rectangular columns — the soft corners come from the outer
         // rounded scroll viewport, so inner rounding would look odd at the edges.
@@ -616,7 +632,18 @@ private fun DayColumnCard(
         ),
         modifier = modifier,
     ) {
-        BoxWithConstraints(modifier = Modifier.fillMaxSize()) {
+        BoxWithConstraints(
+            modifier = Modifier
+                .fillMaxSize()
+                // Tap an empty slot to create an event there; taps on event
+                // blocks are consumed by their own handler first. Snaps to hour.
+                .pointerInput(date) {
+                    detectTapGestures { offset ->
+                        val hour = (offset.y / hourPx).toInt().coerceIn(0, 23)
+                        onCreateAt(date, hour * 60)
+                    }
+                },
+        ) {
             val colWidth = maxWidth
             blocks.forEach { block ->
                 val laneWidth = colWidth / block.laneCount

app/src/main/res/drawable/ic_gitea.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Gitea brand mark, used on the "Source" button in Settings → About.
+    Single-path logo from Simple Icons (https://simpleicons.org, CC0),
+    pathData kept verbatim so Android's PathParser reads the arc flags.
+    fillColor is a placeholder; the Compose Icon recolours it via tint.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M4.209 4.603c-.247 0-.525.02-.84.088-.333.07-1.28.283-2.054 1.027C-.403 7.25.035 9.685.089 10.052c.065.446.263 1.687 1.21 2.768 1.749 2.141 5.513 2.092 5.513 2.092s.462 1.103 1.168 2.119c.955 1.263 1.936 2.248 2.89 2.367 2.406 0 7.212-.004 7.212-.004s.458.004 1.08-.394c.535-.324 1.013-.893 1.013-.893s.492-.527 1.18-1.73c.21-.37.385-.729.538-1.068 0 0 2.107-4.471 2.107-8.823-.042-1.318-.367-1.55-.443-1.627-.156-.156-.366-.153-.366-.153s-4.475.252-6.792.306c-.508.011-1.012.023-1.512.027v4.474l-.634-.301c0-1.39-.004-4.17-.004-4.17-1.107.016-3.405-.084-3.405-.084s-5.399-.27-5.987-.324c-.187-.011-.401-.032-.648-.032zm.354 1.832h.111s.271 2.269.6 3.597C5.549 11.147 6.22 13 6.22 13s-.996-.119-1.641-.348c-.99-.324-1.409-.714-1.409-.714s-.73-.511-1.096-1.52C1.444 8.73 2.021 7.7 2.021 7.7s.32-.859 1.47-1.145c.395-.106.863-.12 1.072-.12zm8.33 2.554c.26.003.509.127.509.127l.868.422-.529 1.075a.686.686 0 0 0-.614.359.685.685 0 0 0 .072.756l-.939 1.924a.69.69 0 0 0-.66.527.687.687 0 0 0 .347.763.686.686 0 0 0 .867-.206.688.688 0 0 0-.069-.882l.916-1.874a.667.667 0 0 0 .237-.02.657.657 0 0 0 .271-.137 8.826 8.826 0 0 1 1.016.512.761.761 0 0 1 .286.282c.073.21-.073.569-.073.569-.087.29-.702 1.55-.702 1.55a.692.692 0 0 0-.676.477.681.681 0 1 0 1.157-.252c.073-.141.141-.282.214-.431.19-.397.515-1.16.515-1.16.035-.066.218-.394.103-.814-.095-.435-.48-.638-.48-.638-.467-.301-1.116-.58-1.116-.58s0-.156-.042-.27a.688.688 0 0 0-.148-.241l.516-1.062 2.89 1.401s.48.218.583.619c.073.282-.019.534-.069.657-.24.587-2.1 4.317-2.1 4.317s-.232.554-.748.588a1.065 1.065 0 0 1-.393-.045l-.202-.08-4.31-2.1s-.417-.218-.49-.596c-.083-.31.104-.691.104-.691l2.073-4.272s.183-.37.466-.497a.855.855 0 0 1 .35-.077z" />
+</vector>

app/src/main/res/values-de/strings.xml

@@ -211,15 +211,41 @@
     <string name="settings_section_notifications">Benachrichtigungen</string>
     <string name="settings_reminders">Termin-Erinnerungen</string>
     <string name="settings_reminders_hint">Erinnerungen doppelt? Eine andere Kalender-App zeigt sie ebenfalls — schalte sie in einer der beiden ab.</string>
+    <string name="settings_section_calendars">Kalender</string>
+    <string name="settings_manage_calendars">Kalender verwalten</string>
+    <string name="settings_manage_calendars_hint">Lokale Kalender anlegen, synchronisierte verwalten</string>
     <string name="settings_section_language">Sprache</string>
     <string name="settings_language">App-Sprache</string>
     <string name="settings_language_auto">Systemstandard</string>
     <string name="settings_language_german">Deutsch</string>
     <string name="settings_language_english">English</string>
+    <!-- Hub category subtitles -->
+    <string name="settings_appearance_subtitle">Design, dynamische Farben, Wochenstart</string>
+    <string name="settings_event_form_subtitle">Standardfelder für neue Termine</string>
+    <string name="settings_notifications_subtitle">Termin-Erinnerungen</string>
     <string name="settings_section_about">Über</string>
-    <string name="settings_version">Version</string>
     <string name="settings_license">Lizenz</string>
     <string name="settings_license_value">MIT</string>
-    <string name="settings_source">Quellcode</string>
-    <string name="settings_source_open">Öffnen</string>
+    <string name="settings_about_author">von Jean-Luc Makiola</string>
+    <string name="settings_about_source">Quellcode</string>
+    <string name="settings_about_version">Version %1$s</string>
+    <string name="settings_about_logo_desc">Calendula-App-Symbol</string>
+
+    <!-- Calendar manager -->
+    <string name="calendars_title">Kalender</string>
+    <string name="calendars_local_header">Deine Kalender</string>
+    <string name="calendars_local_empty">Noch keine lokalen Kalender. Lege einen an, um Termine nur auf diesem Gerät zu speichern.</string>
+    <string name="calendars_add">Kalender hinzufügen</string>
+    <string name="calendars_synced_header">Synchronisierte Kalender</string>
+    <string name="calendars_synced_hint">Diese stammen von Konten auf deinem Gerät. Erstelle und bearbeite sie in der jeweiligen App.</string>
+    <string name="calendars_manage_in_app">Verwalten</string>
+    <string name="calendars_add_account">Konto hinzufügen</string>
+    <string name="calendars_new_title">Neuer Kalender</string>
+    <string name="calendars_edit_title">Kalender bearbeiten</string>
+    <string name="calendars_name_label">Name</string>
+    <string name="calendars_color_label">Farbe</string>
+    <string name="calendars_description_hint">Beschreibung hinzufügen</string>
+    <string name="calendars_delete_confirm_title">Kalender löschen?</string>
+    <string name="calendars_delete_confirm_message">\"%1$s\" und alle zugehörigen Termine werden dauerhaft von diesem Gerät entfernt.</string>
+    <string name="calendars_write_error">Änderung konnte nicht gespeichert werden.</string>
 </resources>

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

@@ -212,16 +212,43 @@
     <string name="settings_section_notifications">Notifications</string>
     <string name="settings_reminders">Event reminders</string>
     <string name="settings_reminders_hint">Seeing reminders twice? Another calendar app is posting them too — turn them off in one of the two.</string>
+    <string name="settings_section_calendars">Calendars</string>
+    <string name="settings_manage_calendars">Manage calendars</string>
+    <string name="settings_manage_calendars_hint">Create local calendars; manage synced ones</string>
     <string name="settings_section_language">Language</string>
     <string name="settings_language">App language</string>
     <string name="settings_language_auto">System default</string>
     <string name="settings_language_german">Deutsch</string>
     <string name="settings_language_english">English</string>
+    <!-- Hub category subtitles -->
+    <string name="settings_appearance_subtitle">Theme, dynamic colour, week start</string>
+    <string name="settings_event_form_subtitle">Default fields for new events</string>
+    <string name="settings_notifications_subtitle">Event reminders</string>
     <string name="settings_section_about">About</string>
-    <string name="settings_version">Version</string>
     <string name="settings_license">License</string>
     <string name="settings_license_value">MIT</string>
-    <string name="settings_source">Source code</string>
-    <string name="settings_source_open">Open</string>
+    <string name="settings_about_author">by Jean-Luc Makiola</string>
+    <string name="settings_about_source">Source</string>
+    <string name="settings_about_version">Version %1$s</string>
+    <string name="settings_about_logo_desc">Calendula app icon</string>
+
+    <!-- Calendar manager -->
+    <string name="calendars_title">Calendars</string>
+    <string name="calendars_local_header">Your calendars</string>
+    <string name="calendars_local_empty">No local calendars yet. Create one to keep events on this device only.</string>
+    <string name="calendars_add">Add calendar</string>
+    <string name="calendars_synced_header">Synced calendars</string>
+    <string name="calendars_synced_hint">These come from accounts on your device. Create and edit them in their own app.</string>
+    <string name="calendars_manage_in_app">Manage</string>
+    <string name="calendars_add_account">Add account</string>
+    <string name="calendars_new_title">New calendar</string>
+    <string name="calendars_edit_title">Edit calendar</string>
+    <string name="calendars_name_label">Name</string>
+    <string name="calendars_color_label">Color</string>
+    <string name="calendars_description_hint">Add a description</string>
+    <string name="calendars_delete_confirm_title">Delete calendar?</string>
+    <string name="calendars_delete_confirm_message">\"%1$s\" and all of its events will be permanently removed from this device.</string>
+    <string name="calendars_write_error">Couldn\'t save the change.</string>
     <string name="about_source_url" translatable="false">https://gitea.jeanlucmakiola.de/makiolaj/calendula</string>
+    <string name="about_license_url" translatable="false">https://gitea.jeanlucmakiola.de/makiolaj/calendula/src/branch/main/LICENSE</string>
 </resources>

app/src/test/java/de/jeanlucmakiola/calendula/data/calendar/CalendarMapperTest.kt

@@ -14,6 +14,7 @@ class CalendarMapperTest {
         color: Int = 0,
         visible: Int = 1,
         accessLevel: Int = CalendarContract.Calendars.CAL_ACCESS_OWNER,
+        description: String? = null,
     ): MapColumnReader = MapColumnReader(
         CalendarProjection.IDX_ID to id,
         CalendarProjection.IDX_DISPLAY_NAME to displayName,
@@ -22,6 +23,7 @@ class CalendarMapperTest {
         CalendarProjection.IDX_COLOR to color,
         CalendarProjection.IDX_VISIBLE to visible,
         CalendarProjection.IDX_ACCESS_LEVEL to accessLevel,
+        CalendarProjection.IDX_DESCRIPTION to description,
     )
 
     @Test
@@ -90,4 +92,35 @@ class CalendarMapperTest {
         val src = reader(accessLevel = CalendarContract.Calendars.CAL_ACCESS_NONE)
         assertThat(src.toCalendarSource().canModifyContents).isFalse()
     }
+
+    @Test
+    fun `local account type marks the calendar as app-owned`() {
+        val src = reader(accountType = CalendarContract.ACCOUNT_TYPE_LOCAL).toCalendarSource()
+        assertThat(src.isLocal).isTrue()
+    }
+
+    @Test
+    fun `synced account type is not local`() {
+        val src = reader(accountType = "com.google").toCalendarSource()
+        assertThat(src.isLocal).isFalse()
+    }
+
+    @Test
+    fun `local calendar exposes its CAL_SYNC1 description`() {
+        val src = reader(
+            accountType = CalendarContract.ACCOUNT_TYPE_LOCAL,
+            description = "House stuff",
+        ).toCalendarSource()
+        assertThat(src.description).isEqualTo("House stuff")
+    }
+
+    @Test
+    fun `synced calendar never exposes CAL_SYNC1 as a description`() {
+        // CAL_SYNC1 holds the sync token for synced rows — it must not leak as a note.
+        val src = reader(
+            accountType = "com.google",
+            description = """{"type":"SYNC_TOKEN","value":"…"}""",
+        ).toCalendarSource()
+        assertThat(src.description).isNull()
+    }
 }

app/src/test/java/de/jeanlucmakiola/calendula/data/calendar/CalendarRepositoryImplTest.kt

@@ -327,6 +327,65 @@ class CalendarRepositoryImplTest {
         }
     }
 
+    @Test
+    fun `createLocalCalendar delegates and returns the new id`(@TempDir tempDir: Path) = runTest {
+        val fake = FakeCalendarDataSource().apply { nextCalendarId = 501L }
+        val repo = CalendarRepositoryImpl(fake, newPrefs(tempDir), Dispatchers.Unconfined)
+
+        val id = repo.createLocalCalendar(
+            displayName = "Home",
+            color = 0xFF33B679.toInt(),
+            description = "House stuff",
+        )
+
+        assertThat(id).isEqualTo(501L)
+        assertThat(fake.createdCalendars).containsExactly(
+            FakeCalendarDataSource.CreatedCalendar("Home", 0xFF33B679.toInt(), "House stuff"),
+        )
+    }
+
+    @Test
+    fun `updateCalendar forwards id, name, color and description`(@TempDir tempDir: Path) = runTest {
+        val fake = FakeCalendarDataSource()
+        val repo = CalendarRepositoryImpl(fake, newPrefs(tempDir), Dispatchers.Unconfined)
+
+        repo.updateCalendar(
+            id = 5L,
+            displayName = "Renamed",
+            color = 0xFF039BE5.toInt(),
+            description = null,
+        )
+
+        assertThat(fake.updatedCalendars).containsExactly(
+            FakeCalendarDataSource.UpdatedCalendar(5L, "Renamed", 0xFF039BE5.toInt(), null),
+        )
+    }
+
+    @Test
+    fun `deleteCalendar delegates to the data source`(@TempDir tempDir: Path) = runTest {
+        val fake = FakeCalendarDataSource()
+        val repo = CalendarRepositoryImpl(fake, newPrefs(tempDir), Dispatchers.Unconfined)
+
+        repo.deleteCalendar(id = 7L)
+
+        assertThat(fake.deletedCalendarIds).containsExactly(7L)
+    }
+
+    @Test
+    fun `createLocalCalendar propagates write failures`(@TempDir tempDir: Path) = runTest {
+        val fake = FakeCalendarDataSource().apply {
+            writeError = WriteFailedException("create local calendar 'Home'")
+        }
+        val repo = CalendarRepositoryImpl(fake, newPrefs(tempDir), Dispatchers.Unconfined)
+
+        try {
+            repo.createLocalCalendar(displayName = "Home", color = 0, description = null)
+            error("Expected WriteFailedException")
+        } catch (expected: WriteFailedException) {
+            assertThat(expected.message).contains("Home")
+        }
+    }
+
     @Test
     fun `eventDetail throws NoSuchEventException when data source returns null`(@TempDir tempDir: Path) = runTest {
         val fake = FakeCalendarDataSource().apply {

app/src/test/java/de/jeanlucmakiola/calendula/data/calendar/FakeCalendarDataSource.kt

@@ -26,6 +26,18 @@ internal class FakeCalendarDataSource : CalendarDataSource {
     val deletedEventIds = mutableListOf<Long>()
     val deletedOccurrences = mutableListOf<Pair<Long, Long>>()
     val deletedFromOccurrences = mutableListOf<Pair<Long, Long>>()
+    /** Id returned by the next [createLocalCalendar]. */
+    var nextCalendarId: Long = 500L
+    data class CreatedCalendar(val displayName: String, val color: Int, val description: String?)
+    data class UpdatedCalendar(
+        val id: Long,
+        val displayName: String,
+        val color: Int,
+        val description: String?,
+    )
+    val createdCalendars = mutableListOf<CreatedCalendar>()
+    val updatedCalendars = mutableListOf<UpdatedCalendar>()
+    val deletedCalendarIds = mutableListOf<Long>()
 
     private val listeners = mutableListOf<() -> Unit>()
 
@@ -34,6 +46,22 @@ internal class FakeCalendarDataSource : CalendarDataSource {
         instancesResult(beginMillis, endMillis)
     override fun eventDetail(eventId: Long): EventDetail? = eventDetailResult(eventId)
 
+    override fun createLocalCalendar(displayName: String, color: Int, description: String?): Long {
+        writeError?.let { throw it }
+        createdCalendars += CreatedCalendar(displayName, color, description)
+        return nextCalendarId
+    }
+
+    override fun updateCalendar(id: Long, displayName: String, color: Int, description: String?) {
+        writeError?.let { throw it }
+        updatedCalendars += UpdatedCalendar(id, displayName, color, description)
+    }
+
+    override fun deleteCalendar(id: Long) {
+        writeError?.let { throw it }
+        deletedCalendarIds += id
+    }
+
     override fun insertEvent(form: EventForm): Long {
         writeError?.let { throw it }
         insertedForms += form