ci(fdroid): fix invalid YAML in the submodule-aware checkout steps

The earlier submodule wiring left a mis-indented `with:` / `submodules:
recursive` block under `uses: actions/checkout@v4` (and, in ci.yaml, a second
stray `with:`), which made both workflows fail to parse
("mapping values are not allowed here"). Merge submodules into the single
correctly-indented `with:` block so CI actually checks out floret-kit.

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

.gitea/ISSUE_TEMPLATE/crash_report.md

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

.gitea/ISSUE_TEMPLATE/feature_request.md

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

.gitea/ISSUE_TEMPLATE/question.md

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

.gitea/workflows/ci.yaml

@@ -29,6 +29,7 @@ jobs:
         with:
           # Full history so the base..HEAD diff below has a merge-base.
           fetch-depth: 0
+          submodules: recursive
 
       # Cheap, always-on guard: the release build must stay reproducible for the
       # official F-Droid repo (no AGP VCS-info embedding). Runs regardless of

.gitea/workflows/release.yaml

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

.gitmodules

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

CHANGELOG.md

@@ -5,6 +5,58 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.11.0] — 2026-06-27
+
+### Added
+- Start the week on any day. The **Week starts on** setting (Settings →
+  Appearance) now offers every weekday — not just Monday or Sunday — alongside
+  the automatic, locale-based default. Thanks to @zmaherdev for the suggestion
+  ([#3]).
+- Choose a 12- or 24-hour clock. A new **Time format** setting (Settings →
+  Appearance) lets you force a 12-hour (2:00 PM) or 24-hour (14:00) clock, or
+  follow the system setting automatically. It applies everywhere times appear —
+  the week and day timelines, agenda, event details, search and reminders — so
+  the format is now consistent across the whole app. Thanks to @zmaherdev for
+  the suggestion ([#6]).
+- Optional hour lines in the timeline. A new **Hour lines** switch (Settings →
+  Appearance) draws a faint separator at each hour in the week and day views,
+  making it easier to see when events start and end. Off by default. Thanks to
+  @zmaherdev for the suggestion ([#5]).
+- Limit how far ahead the agenda looks, and switch it on the fly. New **Agenda
+  range** and **Agenda widget range** settings (Settings → Appearance) let the
+  agenda screen and its home-screen widget each show just today, the rest of this
+  week, the rest of this month, a rolling 7 or 30 days, or a custom number of
+  days — "This week" follows your week-start. The agenda also gains a bar at the
+  top naming the exact dates in view, with a button to switch the range just for
+  the current session (it resets when you reopen the app); the bar can be turned
+  off. Thanks to @zmaherdev for the suggestion ([#4]).
+- Automatic backup of local calendars. A new **Automatic backup** option
+  (Settings → Calendars → Backup) periodically exports your local calendars to an
+  `.ics` file in a folder you choose, on an interval you set (from 30 minutes up).
+  Useful for file-based syncing such as Syncthing, or simply as a safety net — it
+  is a one-way export and never touches your synced accounts. Thanks to @shield
+  for the discussion that inspired it ([#7], [#8]).
+- Field icons in the event-form settings. Each optional-field toggle (Settings →
+  Event form) now shows the same icon the field uses in the new-event form, so
+  the list is easier to scan.
+- Help translate Calendula. A **Help translate** link at the top of **Settings →
+  App language** opens the project's Weblate, where you can add or improve a
+  language in your browser — no coding needed. Contributions in any language are
+  welcome.
+
+### Changed
+- Tidied **Settings → Appearance** into clearer groups (theme & colour, calendar,
+  agenda), and the agenda's empty state now reads "You're all caught up".
+- Reworked **Settings → Calendars**. Local and synced calendars are now grouped
+  into collapsible, source-branded cards — each account shows its app's icon —
+  with a per-account menu to enable or disable all of its calendars at once or
+  open the account in its source app.
+- Reorganised **Settings → Notifications**: reliable-delivery and snooze settings
+  moved up with the other global reminder options, and the per-calendar reminder
+  overrides now fold into a single expandable section.
+- Moved **Add Quick Settings tile** out of the event-form section to its own
+  top-level entry in Settings.
+
 ## [2.10.0] — 2026-06-25
 
 ### Added
@@ -627,3 +679,9 @@ automatically, with zero telemetry and no internet permission.
 
 [#1]: https://codeberg.org/jlmakiola/calendula/issues/1
 [#2]: https://codeberg.org/jlmakiola/calendula/issues/2
+[#3]: https://codeberg.org/jlmakiola/calendula/issues/3
+[#4]: https://codeberg.org/jlmakiola/calendula/issues/4
+[#5]: https://codeberg.org/jlmakiola/calendula/issues/5
+[#6]: https://codeberg.org/jlmakiola/calendula/issues/6
+[#7]: https://codeberg.org/jlmakiola/calendula/issues/7
+[#8]: https://codeberg.org/jlmakiola/calendula/issues/8

README.md

@@ -68,7 +68,8 @@ database, no sync stack reinvented.
 
 - Real Material 3 Expressive throughout — dynamic color (Android 12+),
   expressive motion and shapes, light/dark theme
-- German and English UI, per-app language setting
+- German and English UI, per-app language setting — and [open to community
+  translations](#-translations)
 - **Zero telemetry, zero analytics, no internet permission** — your data
   never leaves the device
 
@@ -108,6 +109,17 @@ without reinstalling. Or build from source — see below.
 - **[Architecture](docs/ARCHITECTURE.md)** — the layered design and key pipelines
 - **[Roadmap](.planning/ROADMAP.md)** — what's shipped and what's next
 
+## 🌍 Translations
+
+Calendula ships in German and English, and you're warmly invited to add your
+language. Translations are managed on a self-hosted **Weblate**:
+
+**→ [Help translate Calendula](https://weblate.dev.jeanlucmakiola.de/engage/calendula/)**
+
+No coding needed — register on the Weblate server, pick (or request) a language,
+and translate the strings in your browser. You can also reach this link in the
+app from the top of **Settings → App language**.
+
 ## 📜 License
 
 [MIT](LICENSE) — Jean-Luc Makiola, 2026

app/build.gradle.kts

@@ -28,8 +28,8 @@ android {
         // which builds this version and then creates the matching vX.Y.Z tag +
         // release itself (versionCode is pinned to MAJOR*10000 + MINOR*100 +
         // PATCH from versionName, e.g. 2.7.2 -> 20702). See docs/RELEASING.md.
-        versionCode = 21000
+        versionCode = 21100
-        versionName = "2.10.0"
+        versionName = "2.11.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -152,10 +152,19 @@ dependencies {
 
     implementation(libs.androidx.datastore.preferences)
 
+    implementation(libs.androidx.work.runtime.ktx)
+    implementation(libs.androidx.documentfile)
+
     implementation(libs.androidx.glance.appwidget)
     implementation(libs.androidx.glance.material3)
 
     implementation(libs.kotlinx.datetime)
+    implementation("de.jeanlucmakiola.floret:core-time")
+    implementation("de.jeanlucmakiola.floret:core-locale")
+    implementation("de.jeanlucmakiola.floret:core-crash")
+    implementation("de.jeanlucmakiola.floret:core-reminders")
+    implementation("de.jeanlucmakiola.floret:identity")
+    implementation("de.jeanlucmakiola.floret:components")
     implementation(libs.kotlinx.coroutines.core)
 
     debugImplementation(libs.androidx.ui.tooling)

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

@@ -1,8 +1,17 @@
 package de.jeanlucmakiola.calendula
 
 import android.app.Application
+import dagger.hilt.android.EntryPointAccessors
 import dagger.hilt.android.HiltAndroidApp
-import de.jeanlucmakiola.calendula.data.crash.CrashReporter
+import de.jeanlucmakiola.calendula.data.backup.BackupScheduler
+import de.jeanlucmakiola.calendula.data.backup.BackupWorker
+import de.jeanlucmakiola.floret.crash.CrashConfig
+import de.jeanlucmakiola.floret.crash.CrashReporter
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
 
 /**
  * Application entry point. Registered as android:name=".CalendulaApp"
@@ -14,7 +23,36 @@ class CalendulaApp : Application() {
     override fun onCreate() {
         super.onCreate()
         // Install first thing so startup crashes are captured too (privacy-
-        // respecting, on-device; the user submits the report by hand).
+        // respecting, on-device; the user submits the report by hand). The
-        CrashReporter.install(this)
+        // capture/loop-detection/report machinery lives in floret-kit's
+        // core-crash; only the app label + issue-tracker URLs are app-specific.
+        CrashReporter.install(
+            this,
+            CrashConfig(
+                appLabel = getString(R.string.app_name),
+                newIssueUrl = getString(R.string.report_issue_url),
+                chooseIssueUrl = getString(R.string.report_issue_choose_url),
+                issueTitle = getString(R.string.crash_report_issue_title),
+            ),
+        )
+        reconcileAutoBackup()
+    }
+
+    /**
+     * Bring the scheduled auto-backup work back in line with the saved settings
+     * on every launch — re-arms it after a reinstall and, crucially, cancels any
+     * orphaned work once backup has been turned off.
+     */
+    private fun reconcileAutoBackup() {
+        val deps = EntryPointAccessors.fromApplication(this, BackupWorker.Deps::class.java)
+        CoroutineScope(SupervisorJob() + Dispatchers.Default).launch {
+            val prefs = deps.settingsPrefs()
+            BackupScheduler.apply(
+                context = this@CalendulaApp,
+                enabled = prefs.autoBackupEnabled.first(),
+                intervalMinutes = prefs.autoBackupIntervalMinutes.first(),
+                hasFolder = prefs.autoBackupFolderUri.first() != null,
+            )
+        }
     }
 }

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

@@ -9,24 +9,30 @@ import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.core.content.IntentCompat
 import androidx.core.net.toUri
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import dagger.hilt.android.AndroidEntryPoint
-import de.jeanlucmakiola.calendula.data.crash.CrashReporter
 import de.jeanlucmakiola.calendula.data.prefs.ThemeMode
+import de.jeanlucmakiola.calendula.data.prefs.is24Hour
 import de.jeanlucmakiola.calendula.ui.RootScreen
+import de.jeanlucmakiola.calendula.ui.common.LocalShowHourLines
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
 import de.jeanlucmakiola.calendula.ui.WidgetNavRequest
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
 import de.jeanlucmakiola.calendula.ui.crash.CrashReportActivity
-import de.jeanlucmakiola.calendula.ui.crash.CrashReportDialog
-import de.jeanlucmakiola.calendula.ui.crash.submitCrashReport
 import de.jeanlucmakiola.calendula.ui.settings.SettingsViewModel
+import de.jeanlucmakiola.floret.crash.CrashReportDialog
+import de.jeanlucmakiola.floret.crash.CrashReporter
+import de.jeanlucmakiola.floret.crash.submitCrashReport
 import de.jeanlucmakiola.calendula.ui.theme.CalendulaTheme
 import kotlinx.datetime.LocalDate
 
@@ -81,9 +87,20 @@ class MainActivity : AppCompatActivity() {
                 ThemeMode.LIGHT -> false
                 ThemeMode.DARK -> true
             }
+            // The app-wide clock convention: the time-format preference resolved
+            // against the device's 24-hour system setting, provided once here so
+            // every time label reads it via LocalUse24HourFormat.
+            val context = LocalContext.current
+            val use24Hour = remember(settings.timeFormat, context) {
+                settings.timeFormat.is24Hour(android.text.format.DateFormat.is24HourFormat(context))
+            }
             CalendulaTheme(
                 darkTheme = darkTheme,
                 dynamicColor = settings.dynamicColor,
+            ) {
+                CompositionLocalProvider(
+                    LocalUse24HourFormat provides use24Hour,
+                    LocalShowHourLines provides settings.showHourLines,
                 ) {
                     RootScreen(
                         modifier = Modifier.fillMaxSize(),
@@ -94,6 +111,7 @@ class MainActivity : AppCompatActivity() {
                         requestedImportUri = requestedImportUri,
                         onImportConsumed = { requestedImportUri = null },
                     )
+                }
                 pendingCrashReport?.let { report ->
                     CrashReportDialog(
                         report = report,

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

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

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

@@ -1,5 +1,7 @@
 package de.jeanlucmakiola.calendula.data.calendar
 
+import de.jeanlucmakiola.floret.time.toEpochMillis
+import de.jeanlucmakiola.floret.time.toKotlinInstantFromEpochMillis
 import android.Manifest
 import android.content.ContentResolver
 import android.content.ContentUris

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

@@ -1,5 +1,6 @@
 package de.jeanlucmakiola.calendula.data.calendar
 
+import de.jeanlucmakiola.floret.time.toEpochMillis
 import de.jeanlucmakiola.calendula.data.di.IoDispatcher
 import de.jeanlucmakiola.calendula.data.prefs.CalendarPrefs
 import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs

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

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

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

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

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

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

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

@@ -1,5 +1,6 @@
 package de.jeanlucmakiola.calendula.data.calendar
 
+import de.jeanlucmakiola.floret.time.toKotlinInstantFromEpochMillis
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.ics.parseRfc2445DurationMillis
 

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

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

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

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

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

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

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

@@ -5,9 +5,16 @@ import androidx.datastore.preferences.core.Preferences
 import androidx.datastore.preferences.core.booleanPreferencesKey
 import androidx.datastore.preferences.core.edit
 import androidx.datastore.preferences.core.intPreferencesKey
+import androidx.datastore.preferences.core.longPreferencesKey
 import androidx.datastore.preferences.core.stringPreferencesKey
 import de.jeanlucmakiola.calendula.domain.EventFormField
+import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
+import de.jeanlucmakiola.calendula.ui.agenda.parseAgendaRange
+import de.jeanlucmakiola.calendula.ui.agenda.storageValue
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
+import de.jeanlucmakiola.floret.reminders.ReminderOverride
+import de.jeanlucmakiola.floret.reminders.ReminderOverrideCodec
+import de.jeanlucmakiola.floret.reminders.applyReminderOverride
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.map
 import kotlinx.datetime.DayOfWeek
@@ -19,18 +26,39 @@ import javax.inject.Singleton
 /** Light/dark override. SYSTEM follows the device setting. */
 enum class ThemeMode { SYSTEM, LIGHT, DARK }
 
-/** Week-start override. AUTO derives the first day from the active locale. */
+/**
-enum class WeekStartPref { AUTO, MONDAY, SUNDAY }
+ * Week-start override. [Auto] derives the first day from the active locale;
+ * [Day] pins a specific weekday (any of the seven).
+ */
+sealed interface WeekStartPref {
+    data object Auto : WeekStartPref
+    data class Day(val day: DayOfWeek) : WeekStartPref
+}
 
 /**
- * Resolve the preference to a concrete first-day-of-week. AUTO reads the
+ * Clock convention for time-of-day labels. AUTO follows the device's 24-hour
- * locale's convention (e.g. Monday in DE, Sunday in en-US).
+ * system setting; the others force a 12- or 24-hour clock app-wide.
+ */
+enum class TimeFormatPref { AUTO, TWELVE_HOUR, TWENTY_FOUR_HOUR }
+
+/**
+ * Resolve to a concrete 24-hour flag. AUTO defers to [systemIs24Hour] (the
+ * device's `DateFormat.is24HourFormat` value).
+ */
+fun TimeFormatPref.is24Hour(systemIs24Hour: Boolean): Boolean = when (this) {
+    TimeFormatPref.AUTO -> systemIs24Hour
+    TimeFormatPref.TWELVE_HOUR -> false
+    TimeFormatPref.TWENTY_FOUR_HOUR -> true
+}
+
+/**
+ * Resolve the preference to a concrete first-day-of-week. [WeekStartPref.Auto]
+ * reads the locale's convention (e.g. Monday in DE, Sunday in en-US).
  */
 fun WeekStartPref.resolveFirstDay(locale: Locale): DayOfWeek = when (this) {
-    WeekStartPref.MONDAY -> DayOfWeek.MONDAY
+    is WeekStartPref.Day -> day
-    WeekStartPref.SUNDAY -> DayOfWeek.SUNDAY
     // java.time.DayOfWeek.value is ISO 1..7 (Mon..Sun) — same numbering kotlinx uses.
-    WeekStartPref.AUTO -> DayOfWeek(WeekFields.of(locale).firstDayOfWeek.value)
+    WeekStartPref.Auto -> DayOfWeek(WeekFields.of(locale).firstDayOfWeek.value)
 }
 
 /**
@@ -55,7 +83,7 @@ class SettingsPrefs @Inject constructor(
     }
 
     val weekStart: Flow<WeekStartPref> = store.data.map { prefs ->
-        prefs[WEEK_START_KEY].toEnum(WeekStartPref.AUTO)
+        parseWeekStart(prefs[WEEK_START_KEY])
     }
 
     suspend fun setThemeMode(mode: ThemeMode) {
@@ -67,7 +95,62 @@ class SettingsPrefs @Inject constructor(
     }
 
     suspend fun setWeekStart(pref: WeekStartPref) {
-        store.edit { it[WEEK_START_KEY] = pref.name }
+        store.edit { it[WEEK_START_KEY] = pref.storageValue() }
+    }
+
+    /** Clock convention for time-of-day labels (v2.11). Defaults to AUTO (system). */
+    val timeFormat: Flow<TimeFormatPref> = store.data.map { prefs ->
+        prefs[TIME_FORMAT_KEY].toEnum(TimeFormatPref.AUTO)
+    }
+
+    suspend fun setTimeFormat(pref: TimeFormatPref) {
+        store.edit { it[TIME_FORMAT_KEY] = pref.name }
+    }
+
+    /**
+     * Whether the week/day timeline draws a faint separator line at each hour
+     * (v2.11). Defaults to OFF — the historical clean look; users opt in.
+     */
+    val showHourLines: Flow<Boolean> = store.data.map { prefs ->
+        prefs[SHOW_HOUR_LINES_KEY] ?: false
+    }
+
+    suspend fun setShowHourLines(enabled: Boolean) {
+        store.edit { it[SHOW_HOUR_LINES_KEY] = enabled }
+    }
+
+    /**
+     * How far ahead the in-app Agenda screen shows events (v2.11). Defaults to
+     * [AgendaRange.Month] — a month of upcoming events. Independent of the
+     * widget's [agendaWidgetRange].
+     */
+    val agendaScreenRange: Flow<AgendaRange> = store.data.map { prefs ->
+        parseAgendaRange(prefs[AGENDA_SCREEN_RANGE_KEY], AgendaRange.Month)
+    }
+
+    suspend fun setAgendaScreenRange(range: AgendaRange) {
+        store.edit { it[AGENDA_SCREEN_RANGE_KEY] = range.storageValue() }
+    }
+
+    /** How far ahead the agenda **widget** shows events (v2.11). Defaults to Month. */
+    val agendaWidgetRange: Flow<AgendaRange> = store.data.map { prefs ->
+        parseAgendaRange(prefs[AGENDA_WIDGET_RANGE_KEY], AgendaRange.Month)
+    }
+
+    suspend fun setAgendaWidgetRange(range: AgendaRange) {
+        store.edit { it[AGENDA_WIDGET_RANGE_KEY] = range.storageValue() }
+    }
+
+    /**
+     * Whether the agenda shows its top range bar — the "showing …" header and
+     * the session range switcher (v2.11). Default ON.
+     */
+    val agendaShowRangeBar: Flow<Boolean> = store.data.map { prefs ->
+        prefs[AGENDA_SHOW_RANGE_BAR_KEY] ?: true
+    }
+
+    suspend fun setAgendaShowRangeBar(enabled: Boolean) {
+        store.edit { it[AGENDA_SHOW_RANGE_BAR_KEY] = enabled }
     }
 
     /**
@@ -216,14 +299,14 @@ class SettingsPrefs @Inject constructor(
      * [defaultAllDayReminderMinutes].)
      */
     val perCalendarReminderOverride: Flow<Map<Long, Int?>> = store.data.map { prefs ->
-        parseReminderOverrides(prefs[CALENDAR_REMINDER_OVERRIDE_KEY])
+        reminderOverrideCodec.parse(prefs[CALENDAR_REMINDER_OVERRIDE_KEY])
     }
 
-    suspend fun setCalendarReminderOverride(calendarId: Long, override: CalendarReminderOverride) {
+    suspend fun setCalendarReminderOverride(calendarId: Long, override: ReminderOverride) {
         store.edit { prefs ->
-            val current = parseReminderOverrides(prefs[CALENDAR_REMINDER_OVERRIDE_KEY]).toMutableMap()
+            val current = reminderOverrideCodec.parse(prefs[CALENDAR_REMINDER_OVERRIDE_KEY]).toMutableMap()
-            current.applyOverride(calendarId, override)
+            current.applyReminderOverride(calendarId, override)
-            prefs[CALENDAR_REMINDER_OVERRIDE_KEY] = serializeReminderOverrides(current)
+            prefs[CALENDAR_REMINDER_OVERRIDE_KEY] = reminderOverrideCodec.serialize(current)
         }
     }
 
@@ -233,18 +316,64 @@ class SettingsPrefs @Inject constructor(
      * inherit the global all-day default; present null = no reminder).
      */
     val perCalendarAllDayReminderOverride: Flow<Map<Long, Int?>> = store.data.map { prefs ->
-        parseReminderOverrides(prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY])
+        reminderOverrideCodec.parse(prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY])
     }
 
     suspend fun setCalendarAllDayReminderOverride(
         calendarId: Long,
-        override: CalendarReminderOverride,
+        override: ReminderOverride,
     ) {
         store.edit { prefs ->
             val current =
-                parseReminderOverrides(prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY]).toMutableMap()
+                reminderOverrideCodec.parse(prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY]).toMutableMap()
-            current.applyOverride(calendarId, override)
+            current.applyReminderOverride(calendarId, override)
-            prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY] = serializeReminderOverrides(current)
+            prefs[CALENDAR_ALLDAY_REMINDER_OVERRIDE_KEY] = reminderOverrideCodec.serialize(current)
+        }
+    }
+
+    // --- Automatic backup (issue #8) ------------------------------------
+
+    /** Whether periodic automatic `.ics` export of local calendars is on. Default OFF. */
+    val autoBackupEnabled: Flow<Boolean> = store.data.map { it[AUTO_BACKUP_ENABLED_KEY] ?: false }
+
+    suspend fun setAutoBackupEnabled(enabled: Boolean) {
+        store.edit { it[AUTO_BACKUP_ENABLED_KEY] = enabled }
+    }
+
+    /** Export interval in minutes. Default daily; floored at [MIN_BACKUP_INTERVAL]. */
+    val autoBackupIntervalMinutes: Flow<Long> = store.data.map { prefs ->
+        (prefs[AUTO_BACKUP_INTERVAL_KEY] ?: DEFAULT_BACKUP_INTERVAL).coerceAtLeast(MIN_BACKUP_INTERVAL)
+    }
+
+    suspend fun setAutoBackupIntervalMinutes(minutes: Long) {
+        store.edit { it[AUTO_BACKUP_INTERVAL_KEY] = minutes.coerceAtLeast(MIN_BACKUP_INTERVAL) }
+    }
+
+    /** Persisted SAF tree Uri of the destination folder, or null if unset. */
+    val autoBackupFolderUri: Flow<String?> = store.data.map { it[AUTO_BACKUP_FOLDER_KEY] }
+
+    suspend fun setAutoBackupFolderUri(uri: String?) {
+        store.edit { prefs ->
+            if (uri == null) prefs.remove(AUTO_BACKUP_FOLDER_KEY) else prefs[AUTO_BACKUP_FOLDER_KEY] = uri
+        }
+    }
+
+    /** Outcome of the last automatic run, for the settings status line. */
+    val autoBackupStatus: Flow<BackupStatus> = store.data.map { prefs ->
+        BackupStatus(
+            lastRun = prefs[AUTO_BACKUP_LAST_RUN_KEY] ?: 0L,
+            lastSuccess = prefs[AUTO_BACKUP_LAST_SUCCESS_KEY] ?: true,
+            consecutiveFailures = prefs[AUTO_BACKUP_FAILURES_KEY] ?: 0,
+        )
+    }
+
+    /** Record an automatic run's outcome; resets the failure streak on success. */
+    suspend fun recordAutoBackupRun(success: Boolean, atMillis: Long) {
+        store.edit { prefs ->
+            prefs[AUTO_BACKUP_LAST_RUN_KEY] = atMillis
+            prefs[AUTO_BACKUP_LAST_SUCCESS_KEY] = success
+            val failures = prefs[AUTO_BACKUP_FAILURES_KEY] ?: 0
+            prefs[AUTO_BACKUP_FAILURES_KEY] = if (success) 0 else failures + 1
         }
     }
 
@@ -259,6 +388,11 @@ class SettingsPrefs @Inject constructor(
         internal val THEME_MODE_KEY = stringPreferencesKey("theme_mode")
         internal val DYNAMIC_COLOR_KEY = booleanPreferencesKey("dynamic_color")
         internal val WEEK_START_KEY = stringPreferencesKey("week_start")
+        internal val AGENDA_SCREEN_RANGE_KEY = stringPreferencesKey("agenda_screen_range")
+        internal val AGENDA_WIDGET_RANGE_KEY = stringPreferencesKey("agenda_widget_range")
+        internal val AGENDA_SHOW_RANGE_BAR_KEY = booleanPreferencesKey("agenda_show_range_bar")
+        internal val TIME_FORMAT_KEY = stringPreferencesKey("time_format")
+        internal val SHOW_HOUR_LINES_KEY = booleanPreferencesKey("show_hour_lines")
         internal val DEFAULT_VIEW_KEY = stringPreferencesKey("default_view")
         internal val FORM_FIELDS_KEY = stringPreferencesKey("event_form_default_fields")
         internal val REMINDERS_ENABLED_KEY = booleanPreferencesKey("reminders_enabled")
@@ -282,18 +416,26 @@ class SettingsPrefs @Inject constructor(
             stringPreferencesKey("per_calendar_allday_reminder_override")
         internal val DEFAULT_FORM_FIELDS =
             setOf(EventFormField.Location, EventFormField.Description)
+        internal val AUTO_BACKUP_ENABLED_KEY = booleanPreferencesKey("auto_backup_enabled")
+        internal val AUTO_BACKUP_INTERVAL_KEY = longPreferencesKey("auto_backup_interval_minutes")
+        internal val AUTO_BACKUP_FOLDER_KEY = stringPreferencesKey("auto_backup_folder_uri")
+        internal val AUTO_BACKUP_LAST_RUN_KEY = longPreferencesKey("auto_backup_last_run")
+        internal val AUTO_BACKUP_LAST_SUCCESS_KEY = booleanPreferencesKey("auto_backup_last_success")
+        internal val AUTO_BACKUP_FAILURES_KEY = intPreferencesKey("auto_backup_failures")
+        /** Default automatic-backup interval: daily. */
+        const val DEFAULT_BACKUP_INTERVAL = 1_440L
+        /** Floor for the automatic-backup interval (also above WorkManager's 15-min limit). */
+        const val MIN_BACKUP_INTERVAL = 30L
     }
 }
 
-/** A calendar's reminder-default override (see [SettingsPrefs.perCalendarReminderOverride]). */
+/** Snapshot of the automatic backup's last outcome (see [SettingsPrefs.autoBackupStatus]). */
-sealed interface CalendarReminderOverride {
+data class BackupStatus(
-    /** No override — the calendar uses the global default. */
+    /** Epoch millis of the last run, or 0 if it has never run. */
-    data object Inherit : CalendarReminderOverride
+    val lastRun: Long,
-    /** Explicit "no reminder" for this calendar, regardless of the global default. */
+    val lastSuccess: Boolean,
-    data object None : CalendarReminderOverride
+    val consecutiveFailures: Int,
-    /** A specific lead time in minutes before the event start. */
+)
-    data class Minutes(val minutes: Int) : CalendarReminderOverride
-}
 
 /**
  * The lead time to prefill on a new event: the matching per-calendar override
@@ -319,39 +461,38 @@ fun resolveDefaultReminder(
     }
 }
 
-/** Apply a [CalendarReminderOverride] to an override map ([Inherit] removes the key). */
+/** Sentinel stored for [WeekStartPref.Auto]; days store their [DayOfWeek.name]. */
-private fun MutableMap<Long, Int?>.applyOverride(
+private const val WEEK_START_AUTO = "AUTO"
-    calendarId: Long,
+
-    override: CalendarReminderOverride,
+private fun WeekStartPref.storageValue(): String = when (this) {
-) {
+    WeekStartPref.Auto -> WEEK_START_AUTO
-    when (override) {
+    is WeekStartPref.Day -> day.name
-        CalendarReminderOverride.Inherit -> remove(calendarId)
+}
-        CalendarReminderOverride.None -> put(calendarId, null)
+
-        is CalendarReminderOverride.Minutes -> put(calendarId, override.minutes)
+/**
-    }
+ * Parse the stored week-start value. "AUTO"/null/garbage → [WeekStartPref.Auto];
+ * a [DayOfWeek] name → [WeekStartPref.Day]. The legacy "MONDAY"/"SUNDAY" enum
+ * values migrate transparently, since both are valid day names.
+ */
+private fun parseWeekStart(stored: String?): WeekStartPref = when (stored) {
+    null, WEEK_START_AUTO -> WeekStartPref.Auto
+    else -> DayOfWeek.entries.firstOrNull { it.name == stored }
+        ?.let { WeekStartPref.Day(it) } ?: WeekStartPref.Auto
 }
 
 private const val NONE = "none"
-private const val ENTRY_SEP = ";"
-private const val KEY_VALUE_SEP = "="
 
 private fun String?.toReminderMinutes(): Int? = when (this) {
     null, "", NONE -> null
     else -> toIntOrNull()
 }
 
-private fun parseReminderOverrides(stored: String?): Map<Long, Int?> {
+/**
-    if (stored.isNullOrBlank()) return emptyMap()
+ * Calendula's dialect of the shared per-target reminder-override codec: entries
-    return stored.split(ENTRY_SEP).mapNotNull { entry ->
+ * `id=minutes` joined by `;`, with `none` for an explicit no-reminder. These
-        val parts = entry.split(KEY_VALUE_SEP).takeIf { it.size == 2 } ?: return@mapNotNull null
+ * separators are the on-disk format and must not change without a migration.
-        val id = parts[0].toLongOrNull() ?: return@mapNotNull null
+ */
-        val value = if (parts[1] == NONE) null else parts[1].toIntOrNull() ?: return@mapNotNull null
+private val reminderOverrideCodec = ReminderOverrideCodec(entrySep = ";", keyValueSep = "=", noneToken = NONE)
-        id to value
-    }.toMap()
-}
-
-private fun serializeReminderOverrides(map: Map<Long, Int?>): String =
-    map.entries.joinToString(ENTRY_SEP) { (id, minutes) -> "$id$KEY_VALUE_SEP${minutes ?: NONE}" }
 
 private inline fun <reified E : Enum<E>> String?.toEnum(default: E): E =
     this?.let { stored -> enumValues<E>().firstOrNull { it.name == stored } } ?: default

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

@@ -46,7 +46,7 @@ class EventReminderReceiver : BroadcastReceiver() {
                 if (settingsPrefs.remindersEnabled.first()) {
                     val now = System.currentTimeMillis()
                     val due = alertStore.dueAlerts(now)
-                    due.forEach(notifier::post)
+                    due.forEach { notifier.post(it) }
                     alertStore.markFired(due.map { it.alertId }, now)
                 }
             } finally {

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

@@ -14,6 +14,9 @@ import androidx.core.content.ContextCompat
 import dagger.hilt.android.qualifiers.ApplicationContext
 import de.jeanlucmakiola.calendula.MainActivity
 import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.data.prefs.is24Hour
+import kotlinx.coroutines.flow.first
 import java.time.ZoneId
 import java.util.Locale
 import javax.inject.Inject
@@ -29,6 +32,7 @@ import javax.inject.Singleton
 @Singleton
 class ReminderNotifier @Inject constructor(
     @ApplicationContext private val context: Context,
+    private val settingsPrefs: SettingsPrefs,
 ) {
 
     /** False when the user declined `POST_NOTIFICATIONS` or muted the app. */
@@ -39,15 +43,18 @@ class ReminderNotifier @Inject constructor(
         return granted && NotificationManagerCompat.from(context).areNotificationsEnabled()
     }
 
-    fun post(alert: ReminderAlert) {
+    suspend fun post(alert: ReminderAlert) {
         ensureChannel()
         val title = alert.title.ifBlank { context.getString(R.string.event_untitled) }
+        val is24Hour = settingsPrefs.timeFormat.first()
+            .is24Hour(android.text.format.DateFormat.is24HourFormat(context))
         val time = reminderTimeText(
             beginMillis = alert.beginMillis,
             endMillis = alert.endMillis,
             isAllDay = alert.isAllDay,
             zone = ZoneId.systemDefault(),
             locale = Locale.getDefault(),
+            is24Hour = is24Hour,
         )
         val text = listOfNotNull(time, alert.location).joinToString(" · ")
         val notification = NotificationCompat.Builder(context, CHANNEL_ID)

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

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

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

@@ -24,7 +24,7 @@ import de.jeanlucmakiola.calendula.domain.EventForm
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.ui.agenda.AgendaScreen
 import de.jeanlucmakiola.calendula.ui.calendars.CalendarsScreen
-import de.jeanlucmakiola.calendula.ui.common.calendarFadeThrough
+import de.jeanlucmakiola.floret.identity.fadeThrough
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
 import de.jeanlucmakiola.calendula.ui.common.drillToDay
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarSlideSpec
@@ -244,7 +244,7 @@ fun CalendarHost(
         // Switching between the peer views (month/week/day/agenda) is lateral
         // navigation, so it fades through rather than sliding — paging *within* a
         // view keeps the directional slide. AnimatedContent keyed on the view type.
-        val viewSwitch = calendarFadeThrough()
+        val viewSwitch = fadeThrough()
         AnimatedContent(
             targetState = view,
             transitionSpec = { viewSwitch },

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

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

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

@@ -2,22 +2,26 @@ package de.jeanlucmakiola.calendula.ui.agenda
 
 import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.EventAvailable
+import androidx.compose.material.icons.filled.Coffee
+import androidx.compose.material.icons.filled.DateRange
 import androidx.compose.material.icons.filled.Menu
 import androidx.compose.material.icons.filled.Search
 import androidx.compose.material3.DrawerValue
@@ -35,7 +39,10 @@ import androidx.compose.material3.TopAppBarScrollBehavior
 import androidx.compose.material3.rememberDrawerState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -47,17 +54,22 @@ import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.domain.EventInstance
-import de.jeanlucmakiola.calendula.ui.common.calendarAnimateItem
+import de.jeanlucmakiola.calendula.ui.common.AgendaRangePicker
+import de.jeanlucmakiola.calendula.ui.common.agendaRangeLabel
+import de.jeanlucmakiola.floret.identity.animateItemMotion
 import de.jeanlucmakiola.calendula.ui.common.CalendarDrawer
 import de.jeanlucmakiola.calendula.ui.common.CalendarFabColumn
 import de.jeanlucmakiola.calendula.ui.common.CalendarFailure
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
-import de.jeanlucmakiola.calendula.ui.common.GroupedRow
+import de.jeanlucmakiola.floret.components.GroupedRow
-import de.jeanlucmakiola.calendula.ui.common.Position
+import de.jeanlucmakiola.floret.components.Position
 import de.jeanlucmakiola.calendula.ui.common.ViewSwitcherPill
 import de.jeanlucmakiola.calendula.ui.common.next
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.floret.components.pastelize
-import de.jeanlucmakiola.calendula.ui.common.positionOf
+import de.jeanlucmakiola.floret.components.positionOf
+import de.jeanlucmakiola.calendula.ui.common.currentLocale
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
+import de.jeanlucmakiola.calendula.ui.common.formatTimeOfDay
 import kotlinx.coroutines.launch
 import kotlinx.datetime.DateTimeUnit
 import kotlinx.datetime.LocalDate
@@ -88,11 +100,13 @@ fun AgendaScreen(
     val scrollBehavior = TopAppBarDefaults.pinnedScrollBehavior()
     val drawerState = rememberDrawerState(DrawerValue.Closed)
     val scope = rememberCoroutineScope()
+    var showRangePicker by remember { mutableStateOf(false) }
 
     val isOnToday = when (val s = state) {
         is AgendaUiState.Success -> s.anchor == s.today
         else -> true
     }
+    val successState = state as? AgendaUiState.Success
 
     ModalNavigationDrawer(
         drawerState = drawerState,
@@ -135,16 +149,127 @@ fun AgendaScreen(
                 )
             },
         ) { innerPadding ->
+            Column(
+                modifier = Modifier
+                    .fillMaxSize()
+                    .padding(innerPadding),
+            ) {
+                // One bar at the top: the "showing …" header on the left and the
+                // session range switcher on the right (one settings toggle).
+                successState?.takeIf { it.showRangeBar }?.let { s ->
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(start = 28.dp, end = 16.dp, top = 8.dp, bottom = 8.dp),
+                    ) {
+                        AgendaRangeBanner(
+                            range = s.range,
+                            start = s.anchor,
+                            end = s.rangeEnd,
+                            modifier = Modifier.weight(1f),
+                        )
+                        AgendaRangePill(
+                            range = s.range,
+                            isOverride = s.rangeIsOverride,
+                            onClick = { showRangePicker = true },
+                        )
+                    }
+                }
                 AgendaContent(
                     state = state,
                     onRetry = viewModel::goToToday,
                     onEventClick = onEventClick,
                     modifier = Modifier
-                    .padding(innerPadding)
+                        .weight(1f)
-                    .fillMaxSize(),
+                        .fillMaxWidth(),
                 )
             }
         }
+    }
+
+    if (showRangePicker) {
+        AgendaRangePicker(
+            title = stringResource(R.string.settings_agenda_range),
+            description = stringResource(R.string.agenda_range_override_hint),
+            selected = successState?.range ?: AgendaRange.Month,
+            onSelect = viewModel::setRangeOverride,
+            onDismiss = { showRangePicker = false },
+        )
+    }
+}
+
+/**
+ * A compact tonal pill showing the agenda's current range. Tapping it opens the
+ * range picker as a session-only override. Filled with the primary container
+ * while an override is active, so the temporary state is obvious.
+ */
+@Composable
+private fun AgendaRangePill(
+    range: AgendaRange,
+    isOverride: Boolean,
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    val container = if (isOverride) {
+        MaterialTheme.colorScheme.primaryContainer
+    } else {
+        MaterialTheme.colorScheme.surfaceContainerHigh
+    }
+    val content = if (isOverride) {
+        MaterialTheme.colorScheme.onPrimaryContainer
+    } else {
+        MaterialTheme.colorScheme.onSurfaceVariant
+    }
+    Surface(
+        color = container,
+        contentColor = content,
+        shape = RoundedCornerShape(50),
+        modifier = modifier.clickable(onClick = onClick),
+    ) {
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier.padding(horizontal = 16.dp, vertical = 10.dp),
+        ) {
+            Icon(
+                imageVector = Icons.Filled.DateRange,
+                contentDescription = null,
+                modifier = Modifier.size(18.dp),
+            )
+            Spacer(Modifier.width(8.dp))
+            Text(
+                text = agendaRangeLabel(range),
+                style = MaterialTheme.typography.labelLarge,
+            )
+        }
+    }
+}
+
+/**
+ * A header naming the concrete window currently shown, e.g. "Showing all events
+ * for · Today, 27 Jun 2026" / "This week, 27 Jun – 3 Jul" / "This month, June 2026".
+ */
+@Composable
+private fun AgendaRangeBanner(
+    range: AgendaRange,
+    start: LocalDate,
+    end: LocalDate,
+    modifier: Modifier = Modifier,
+) {
+    val locale = currentLocale()
+    val window = agendaRangeWindowSummary(range, start, end, locale)
+    Column(modifier = modifier) {
+        Text(
+            text = stringResource(R.string.agenda_range_showing_label),
+            style = MaterialTheme.typography.labelMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Text(
+            text = "${agendaRangeLabel(range)}, $window",
+            style = MaterialTheme.typography.titleMedium,
+            color = MaterialTheme.colorScheme.onSurface,
+        )
+    }
 }
 
 @Composable
@@ -191,7 +316,7 @@ private fun AgendaList(
                 AgendaEventRow(
                     event = event,
                     position = positionOf(index, day.events.size),
-                    modifier = calendarAnimateItem(),
+                    modifier = animateItemMotion(),
                     onClick = { onEventClick(event) },
                 )
             }
@@ -254,7 +379,7 @@ private fun AgendaEmpty(modifier: Modifier = Modifier) {
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
         Icon(
-            imageVector = Icons.Filled.EventAvailable,
+            imageVector = Icons.Filled.Coffee,
             contentDescription = null,
             tint = MaterialTheme.colorScheme.onSurfaceVariant,
             modifier = Modifier.size(48.dp),
@@ -265,13 +390,6 @@ private fun AgendaEmpty(modifier: Modifier = Modifier) {
             style = MaterialTheme.typography.titleMedium,
             textAlign = TextAlign.Center,
         )
-        Spacer(Modifier.height(4.dp))
-        Text(
-            text = stringResource(R.string.agenda_empty_subtitle),
-            style = MaterialTheme.typography.bodyMedium,
-            color = MaterialTheme.colorScheme.onSurfaceVariant,
-            textAlign = TextAlign.Center,
-        )
     }
 }
 
@@ -338,15 +456,17 @@ private fun agendaTimeSummary(event: EventInstance): String {
     val time = if (event.isAllDay) {
         stringResource(R.string.event_detail_all_day)
     } else {
-        "${formatTime(event.start)} – ${formatTime(event.end)}"
+        val is24Hour = LocalUse24HourFormat.current
+        val locale = currentLocale()
+        "${formatTime(event.start, is24Hour, locale)} – ${formatTime(event.end, is24Hour, locale)}"
     }
     val location = event.location?.takeIf { it.isNotBlank() }
     return if (location != null) "$time · $location" else time
 }
 
-private fun formatTime(instant: Instant): String {
+private fun formatTime(instant: Instant, is24Hour: Boolean, locale: Locale): String {
     val t = instant.toLocalDateTime(zone).time
-    return "%02d:%02d".format(t.hour, t.minute)
+    return formatTimeOfDay(t.hour, t.minute, is24Hour, locale)
 }
 
 private fun formatAgendaDate(date: LocalDate): String {

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

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

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

@@ -5,6 +5,8 @@ import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
 import de.jeanlucmakiola.calendula.data.di.IoDispatcher
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
+import de.jeanlucmakiola.calendula.data.prefs.resolveFirstDay
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.FailureReason
@@ -17,10 +19,13 @@ import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.flatMapLatest
 import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.datetime.DateTimeUnit
+import kotlinx.datetime.DayOfWeek
 import kotlinx.datetime.LocalDate
 import kotlinx.datetime.TimeZone
+import java.util.Locale
 import kotlinx.datetime.atStartOfDayIn
 import kotlinx.datetime.atTime
 import kotlinx.datetime.plus
@@ -30,16 +35,24 @@ import kotlin.time.Clock
 import kotlin.time.Instant
 import javax.inject.Inject
 
-/** How far ahead the agenda loads events from its anchor day. */
-internal const val AGENDA_WINDOW_DAYS = 60
-
 @OptIn(ExperimentalCoroutinesApi::class)
 @HiltViewModel
 class AgendaViewModel @Inject constructor(
     private val repository: CalendarRepository,
+    settingsPrefs: SettingsPrefs,
     @IoDispatcher private val io: CoroutineDispatcher,
 ) : ViewModel() {
 
+    // The saved agenda range plus the range-bar visibility toggle.
+    private val agendaSettings = combine(
+        settingsPrefs.agendaScreenRange,
+        settingsPrefs.agendaShowRangeBar,
+    ) { range, showBar -> AgendaSettings(range, showBar) }
+
+    // First day of the week, for the calendar-aligned "this week" range.
+    private val weekStartDay = settingsPrefs.weekStart
+        .map { it.resolveFirstDay(Locale.getDefault()) }
+
     private val zone = TimeZone.currentSystemDefault()
 
     private val todayDate: LocalDate
@@ -48,14 +61,32 @@ class AgendaViewModel @Inject constructor(
     private val _anchor = MutableStateFlow(todayDate)
     val anchor: StateFlow<LocalDate> = _anchor
 
-    val state: StateFlow<AgendaUiState> = _anchor
+    // A transient, in-view override of the saved agenda range. Held in memory
-        .flatMapLatest { anchor ->
+    // (not persisted), so it survives view switches and rotation within the
-            val range = agendaRange(anchor, AGENDA_WINDOW_DAYS, zone)
+    // session but resets to the saved default when the app is relaunched.
+    private val _rangeOverride = MutableStateFlow<AgendaRange?>(null)
+
+    val state: StateFlow<AgendaUiState> =
+        combine(_anchor, agendaSettings, _rangeOverride, weekStartDay) { anchor, settings, override, weekStart ->
+            AgendaParams(
+                anchor = anchor,
+                range = override ?: settings.range,
+                rangeIsOverride = override != null && override != settings.range,
+                weekStart = weekStart,
+                showRangeBar = settings.showBar,
+            )
+        }
+        .flatMapLatest { params ->
+            val window = agendaRange(
+                params.anchor,
+                params.range.dayCount(params.anchor, params.weekStart) - 1,
+                zone,
+            )
             combine(
                 repository.calendars(),
-                repository.instances(range),
+                repository.instances(window),
             ) { calendars, instances ->
-                buildState(anchor, calendars, instances)
+                buildState(params, calendars, instances)
             }
         }
         .catch { emit(AgendaUiState.Failure(FailureReason.ProviderUnavailable)) }
@@ -75,16 +106,47 @@ class AgendaViewModel @Inject constructor(
         _anchor.value = date
     }
 
+    /** Temporarily override the agenda range for this session (the bottom-left pill). */
+    fun setRangeOverride(range: AgendaRange) {
+        _rangeOverride.value = range
+    }
+
+    private data class AgendaSettings(
+        val range: AgendaRange,
+        val showBar: Boolean,
+    )
+
+    private data class AgendaParams(
+        val anchor: LocalDate,
+        val range: AgendaRange,
+        val rangeIsOverride: Boolean,
+        val weekStart: DayOfWeek,
+        val showRangeBar: Boolean,
+    )
+
     private fun buildState(
-        anchor: LocalDate,
+        params: AgendaParams,
         calendars: List<CalendarSource>,
         instances: List<EventInstance>,
     ): AgendaUiState {
         if (calendars.isEmpty()) {
             return AgendaUiState.Failure(FailureReason.NoCalendarsConfigured)
         }
+        val anchor = params.anchor
         val days = groupAgendaDays(anchor, instances, zone)
-        return AgendaUiState.Success(anchor = anchor, today = todayDate, days = days)
+        val rangeEnd = anchor.plus(
+            params.range.dayCount(anchor, params.weekStart) - 1,
+            DateTimeUnit.DAY,
+        )
+        return AgendaUiState.Success(
+            anchor = anchor,
+            today = todayDate,
+            days = days,
+            range = params.range,
+            rangeIsOverride = params.rangeIsOverride,
+            rangeEnd = rangeEnd,
+            showRangeBar = params.showRangeBar,
+        )
     }
 }
 

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

@@ -4,13 +4,17 @@ import android.accounts.AccountManager
 import android.content.Context
 import android.content.Intent
 import android.provider.Settings
+import android.text.format.DateUtils
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ColumnScope
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -26,20 +30,28 @@ import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.automirrored.filled.Notes
+import androidx.compose.material.icons.automirrored.filled.OpenInNew
 import androidx.compose.material.icons.filled.Add
 import androidx.compose.material.icons.filled.CalendarMonth
 import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.Cloud
 import androidx.compose.material.icons.filled.Delete
 import androidx.compose.material.icons.filled.FileDownload
-import androidx.compose.material.icons.filled.OpenInNew
+import androidx.compose.material.icons.filled.MoreVert
 import androidx.compose.material.icons.filled.Palette
+import androidx.compose.material.icons.filled.PhoneAndroid
+import androidx.compose.material.icons.filled.Schedule
+import androidx.compose.material.icons.filled.Visibility
+import androidx.compose.material.icons.filled.VisibilityOff
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.SnackbarHost
 import androidx.compose.material3.SnackbarHostState
@@ -61,28 +73,40 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.ImageBitmap
+import androidx.compose.ui.graphics.asImageBitmap
 import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.pluralStringResource
+import androidx.compose.ui.res.stringArrayResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.contentDescription
 import androidx.compose.ui.semantics.semantics
-import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.unit.dp
+import androidx.core.graphics.drawable.toBitmap
+import androidx.core.net.toUri
+import androidx.documentfile.provider.DocumentFile
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.data.prefs.BackupStatus
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.ui.common.CALENDAR_COLOR_PALETTE
 import de.jeanlucmakiola.calendula.ui.common.CalendarColorChip
-import de.jeanlucmakiola.calendula.ui.common.predictiveBack
+import de.jeanlucmakiola.floret.components.DialogAmountField
-import de.jeanlucmakiola.calendula.ui.common.CollapsingScaffold
+import de.jeanlucmakiola.floret.components.DialogUnitDropdown
+import de.jeanlucmakiola.floret.identity.collapseExit
+import de.jeanlucmakiola.floret.identity.expandEnter
+import de.jeanlucmakiola.floret.identity.predictiveBack
+import de.jeanlucmakiola.floret.components.CollapsingScaffold
 import de.jeanlucmakiola.calendula.ui.common.ColorSwatchRow
-import de.jeanlucmakiola.calendula.ui.common.GroupedRow
+import de.jeanlucmakiola.floret.components.GroupedRow
-import de.jeanlucmakiola.calendula.ui.common.InlineTextField
+import de.jeanlucmakiola.floret.components.InlineTextField
-import de.jeanlucmakiola.calendula.ui.common.Position
+import de.jeanlucmakiola.floret.components.Position
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.floret.components.pastelize
-import de.jeanlucmakiola.calendula.ui.common.positionOf
 import java.time.LocalDate
 
 /** Sentinel [editorId] meaning "the editor is composing a new calendar". */
@@ -104,6 +128,7 @@ fun CalendarsScreen(
     val disabledIds by viewModel.disabledCalendarIds.collectAsStateWithLifecycle()
     val error by viewModel.error.collectAsStateWithLifecycle()
     val backupResult by viewModel.backupResult.collectAsStateWithLifecycle()
+    val autoBackup by viewModel.autoBackup.collectAsStateWithLifecycle()
 
     // null = list; NEW_CALENDAR_ID = create; any other id = edit that calendar.
     // [editorSession] bumps on every open so the editor's field state resets for
@@ -144,10 +169,15 @@ fun CalendarsScreen(
             backupResult = backupResult,
             onExportBackup = viewModel::exportBackup,
             onConsumeBackupResult = viewModel::consumeBackupResult,
+            autoBackup = autoBackup,
+            onSetAutoBackupEnabled = viewModel::setAutoBackupEnabled,
+            onSetAutoBackupInterval = viewModel::setAutoBackupIntervalMinutes,
+            onSetAutoBackupFolder = viewModel::setAutoBackupFolder,
             onBack = onBack,
             onAdd = { editorSession++; editorId = NEW_CALENDAR_ID },
             onEdit = { calendar -> editorSession++; editorId = calendar.id },
             onSetDisabled = viewModel::setDisabled,
+            onSetAccountDisabled = viewModel::setAccountDisabled,
         )
     }
 }
@@ -162,13 +192,22 @@ private fun CalendarsList(
     backupResult: BackupResult?,
     onExportBackup: (android.net.Uri) -> Unit,
     onConsumeBackupResult: () -> Unit,
+    autoBackup: AutoBackupUiState,
+    onSetAutoBackupEnabled: (Boolean) -> Unit,
+    onSetAutoBackupInterval: (Long) -> Unit,
+    onSetAutoBackupFolder: (android.net.Uri) -> Unit,
     onBack: () -> Unit,
     onAdd: () -> Unit,
     onEdit: (CalendarSource) -> Unit,
     onSetDisabled: (Long, Boolean) -> Unit,
+    onSetAccountDisabled: (Collection<Long>, Boolean) -> Unit,
 ) {
     val context = LocalContext.current
     val snackbarHostState = remember { SnackbarHostState() }
+    // Accounts the user has folded shut; empty = all expanded (keeps every
+    // calendar visible by default, the section is collapsible for tidiness).
+    var collapsedAccounts by remember { mutableStateOf(emptySet<String>()) }
+    var localExpanded by remember { mutableStateOf(true) }
     val writeErrorText = stringResource(R.string.calendars_write_error)
 
     LaunchedEffect(error) {
@@ -184,6 +223,13 @@ private fun CalendarsList(
         contract = ActivityResultContracts.CreateDocument("text/calendar"),
     ) { uri -> uri?.let(onExportBackup) }
 
+    // SAF folder picker for the automatic-backup destination; the VM persists the
+    // write grant so background runs can keep writing to it.
+    val pickFolder = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.OpenDocumentTree(),
+    ) { uri -> uri?.let(onSetAutoBackupFolder) }
+    var showInterval by remember { mutableStateOf(false) }
+
     val backupFailedText = stringResource(R.string.calendars_backup_failed)
     LaunchedEffect(backupResult) {
         when (val r = backupResult) {
@@ -207,21 +253,39 @@ private fun CalendarsList(
         title = stringResource(R.string.calendars_title),
         onBack = onBack,
         snackbarHost = { SnackbarHost(snackbarHostState) },
+        predictiveBack = true,
+    ) {
+        // What the per-calendar / per-account switches below actually do.
+        HintText(stringResource(R.string.calendars_disable_hint))
+
+        // Local (device-only) calendars — one collapsible group. The header's
+        // "+" adds a calendar; the switch enables/disables them all at once;
+        // tapping a calendar row opens its editor.
+        val localDisabled = local.isNotEmpty() && local.all { it.id in disabledIds }
+        CalendarGroup(
+            title = stringResource(R.string.calendars_local_header),
+            expanded = localExpanded,
+            bodyHasRows = local.isNotEmpty(),
+            headerDisabled = localDisabled,
+            leading = { Box(dimIf(localDisabled)) { LeadingAvatar(Icons.Default.PhoneAndroid) } },
+            manageIcon = Icons.Default.Add,
+            manageLabel = stringResource(R.string.calendars_add),
+            onManage = onAdd,
+            onToggleExpand = { localExpanded = !localExpanded },
+            showToggleAll = local.isNotEmpty(),
+            allEnabled = local.none { it.id in disabledIds },
+            onToggleAll = { enabled -> onSetAccountDisabled(local.map { it.id }, !enabled) },
         ) {
-        // Local (device-only) calendars — the calendars the app owns. The
-        // "Add calendar" entry closes the group as its final row.
-        SectionHeader(stringResource(R.string.calendars_local_header))
             if (local.isEmpty()) {
                 HintText(stringResource(R.string.calendars_local_empty))
-        }
+            } else {
-        HintText(stringResource(R.string.calendars_disable_hint))
-        val localCount = local.size + 1
                 local.forEachIndexed { index, calendar ->
                     val disabled = calendar.id in disabledIds
                     GroupedRow(
                         title = calendar.displayName,
                         summary = calendar.description,
-                position = positionOf(index, localCount),
+                        position = if (index == local.lastIndex) Position.Bottom else Position.Middle,
+                        container = MaterialTheme.colorScheme.surfaceContainerHighest,
                         dimmed = disabled,
                         leading = { CalendarColorChip(calendar.color, dimIf(disabled)) },
                         trailing = {
@@ -234,12 +298,8 @@ private fun CalendarsList(
                         onClick = { onEdit(calendar) },
                     )
                 }
-        GroupedRow(
+            }
-            title = stringResource(R.string.calendars_add),
+        }
-            position = positionOf(local.size, localCount),
-            leading = { AddAvatar() },
-            onClick = onAdd,
-        )
 
         // Backup — local calendars have no sync, so a .ics export is their only
         // safety net. Offered only when there is something to back up.
@@ -247,31 +307,86 @@ private fun CalendarsList(
             Spacer(Modifier.height(16.dp))
             SectionHeader(stringResource(R.string.calendars_backup_header))
             HintText(stringResource(R.string.calendars_backup_hint))
+            // One connected card: the one-time export on top, then automatic
+            // backup (and its folder/interval rows when on).
             GroupedRow(
                 title = stringResource(R.string.calendars_backup_action),
-                position = Position.Alone,
+                position = Position.Top,
                 leading = { LeadingAvatar(Icons.Default.FileDownload) },
                 onClick = {
                     runCatching { createBackup.launch("calendula-backup-${LocalDate.now()}.ics") }
                 },
             )
+            GroupedRow(
+                title = stringResource(R.string.calendars_auto_backup),
+                summary = stringResource(R.string.calendars_auto_backup_hint),
+                position = if (autoBackup.enabled) Position.Middle else Position.Bottom,
+                leading = { LeadingAvatar(Icons.Default.Schedule) },
+                trailing = {
+                    Switch(checked = autoBackup.enabled, onCheckedChange = onSetAutoBackupEnabled)
+                },
+                onClick = { onSetAutoBackupEnabled(!autoBackup.enabled) },
+            )
+            if (autoBackup.enabled) {
+                GroupedRow(
+                    title = stringResource(R.string.calendars_auto_backup_folder),
+                    summary = rememberFolderName(autoBackup.folderUri)
+                        ?: stringResource(R.string.calendars_auto_backup_folder_unset),
+                    position = Position.Middle,
+                    onClick = { runCatching { pickFolder.launch(null) } },
+                )
+                GroupedRow(
+                    title = stringResource(R.string.calendars_auto_backup_interval),
+                    summary = backupIntervalLabel(autoBackup.intervalMinutes),
+                    position = Position.Bottom,
+                    onClick = { showInterval = true },
+                )
+                HintText(backupStatusText(autoBackup.status))
+            }
         }
 
         Spacer(Modifier.height(16.dp))
 
-        // Synced calendars — read-only, grouped by account, each with a
+        // Synced calendars — read-only, grouped by account. Each account is a
-        // per-account "manage in source app" link.
+        // collapsible group whose header opens the source app (icon) and toggles
+        // all of its calendars at once (switch).
         SectionHeader(stringResource(R.string.calendars_synced_header))
         HintText(stringResource(R.string.calendars_synced_hint))
         synced
             .groupBy { it.accountName.ifBlank { it.accountType } }
             .forEach { (account, cals) ->
-                AccountHeader(account = account, accountType = cals.first().accountType)
+                val expanded = account !in collapsedAccounts
+                val accountType = cals.first().accountType
+                val accountDisabled = cals.all { it.id in disabledIds }
+                Spacer(Modifier.height(16.dp))
+                CalendarGroup(
+                    title = account,
+                    expanded = expanded,
+                    bodyHasRows = true,
+                    headerDisabled = accountDisabled,
+                    leading = { Box(dimIf(accountDisabled)) { SourceLogo(accountType) } },
+                    manageIcon = Icons.AutoMirrored.Filled.OpenInNew,
+                    manageLabel = stringResource(R.string.calendars_manage_in_app),
+                    onManage = {
+                        runCatching { context.startActivity(sourceAppIntent(context, accountType)) }
+                    },
+                    onToggleExpand = {
+                        collapsedAccounts = if (expanded) {
+                            collapsedAccounts + account
+                        } else {
+                            collapsedAccounts - account
+                        }
+                    },
+                    showToggleAll = true,
+                    allEnabled = cals.none { it.id in disabledIds },
+                    onToggleAll = { enabled -> onSetAccountDisabled(cals.map { it.id }, !enabled) },
+                ) {
                     cals.forEachIndexed { index, calendar ->
                         val disabled = calendar.id in disabledIds
                         GroupedRow(
                             title = calendar.displayName,
-                        position = positionOf(index, cals.size),
+                            position = if (index == cals.lastIndex) Position.Bottom else Position.Middle,
+                            container = MaterialTheme.colorScheme.surfaceContainerHighest,
                             dimmed = disabled,
                             leading = { CalendarColorChip(calendar.color, dimIf(disabled)) },
                             trailing = {
@@ -284,14 +399,14 @@ private fun CalendarsList(
                         )
                     }
                 }
-        Spacer(Modifier.height(8.dp))
+            }
-        GroupedRow(
+    }
-            title = stringResource(R.string.calendars_add_account),
+
-            position = Position.Alone,
+    if (showInterval) {
-            leading = { AddAvatar() },
+        BackupIntervalDialog(
-            onClick = {
+            currentMinutes = autoBackup.intervalMinutes,
-                runCatching { context.startActivity(Intent(Settings.ACTION_ADD_ACCOUNT)) }
+            onConfirm = onSetAutoBackupInterval,
-            },
+            onDismiss = { showInterval = false },
         )
     }
 }
@@ -498,32 +613,178 @@ private fun EditorCard(
     }
 }
 
+/**
+ * One collapsible calendar group rendered as a connected card. The header row is
+ * the card's top (tap to expand/collapse): a [leading] source mark (the account
+ * app's logo, or a device chip for local), the group [title] and a trailing
+ * overflow (⋮) menu holding the account-level actions — enable/disable every
+ * calendar at once (when [showToggleAll]) and the manage/add action
+ * ([manageIcon] / [manageLabel] → [onManage]). The group's calendars render as
+ * the rows below via [body].
+ *
+ * The header keeps the standard row colour; the calendars it reveals sit one tone
+ * darker, so the group reads as a header over nested content. Once [headerDisabled]
+ * (every calendar switched off) the header fades to the disabled emphasis so the
+ * whole group reads as off — not just via the menu. [bodyHasRows] is false when no
+ * calendar rows follow (e.g. an empty local group), so the header stays a
+ * standalone card rather than a top edge with nothing beneath it.
+ */
 @Composable
-private fun AccountHeader(account: String, accountType: String) {
+private fun CalendarGroup(
-    val context = LocalContext.current
+    title: String,
-    Row(
+    expanded: Boolean,
-        modifier = Modifier
+    bodyHasRows: Boolean,
-            .fillMaxWidth()
+    headerDisabled: Boolean,
-            .padding(start = 28.dp, end = 16.dp, top = 16.dp, bottom = 4.dp),
+    leading: @Composable () -> Unit,
-        verticalAlignment = Alignment.CenterVertically,
+    manageIcon: ImageVector,
-    ) {
+    manageLabel: String,
-        Text(
+    onManage: () -> Unit,
-            text = account,
+    onToggleExpand: () -> Unit,
-            style = MaterialTheme.typography.titleSmall,
+    showToggleAll: Boolean,
-            fontWeight = FontWeight.SemiBold,
+    allEnabled: Boolean,
-            modifier = Modifier.weight(1f),
+    onToggleAll: (Boolean) -> Unit,
+    body: @Composable ColumnScope.() -> Unit,
+) {
+    GroupedRow(
+        title = title,
+        position = if (expanded && bodyHasRows) Position.Top else Position.Alone,
+        dimmed = headerDisabled,
+        leading = leading,
+        trailing = {
+            CalendarGroupMenu(
+                title = title,
+                showToggleAll = showToggleAll,
+                allEnabled = allEnabled,
+                onToggleAll = onToggleAll,
+                manageIcon = manageIcon,
+                manageLabel = manageLabel,
+                onManage = onManage,
+            )
+        },
+        onClick = onToggleExpand,
+    )
+    AnimatedVisibility(
+        visible = expanded,
+        enter = expandEnter(),
+        exit = collapseExit(),
+    ) {
+        Column(content = body)
+    }
+}
+
+/**
+ * The account header's overflow (⋮) menu: the two account-level actions that
+ * don't fit on one line — "Enable/Disable all" (when [showToggleAll]) and the
+ * manage/add action. A rounded, tonal dropdown matching the app's surfaces, with
+ * the two actions divided for clear separation.
+ */
+@Composable
+private fun CalendarGroupMenu(
+    title: String,
+    showToggleAll: Boolean,
+    allEnabled: Boolean,
+    onToggleAll: (Boolean) -> Unit,
+    manageIcon: ImageVector,
+    manageLabel: String,
+    onManage: () -> Unit,
+) {
+    var open by remember { mutableStateOf(false) }
+    Box {
+        IconButton(onClick = { open = true }) {
+            Icon(
+                Icons.Default.MoreVert,
+                contentDescription = stringResource(R.string.calendars_account_menu_a11y, title),
+            )
+        }
+        DropdownMenu(
+            expanded = open,
+            onDismissRequest = { open = false },
+            shape = RoundedCornerShape(20.dp),
+            // A distinct tone + a lifted shadow so the menu reads as floating
+            // above the cards (which sit at surfaceContainerHigh) rather than
+            // blending into them.
+            containerColor = MaterialTheme.colorScheme.surfaceContainerLowest,
+            tonalElevation = 0.dp,
+            shadowElevation = 6.dp,
+        ) {
+            if (showToggleAll) {
+                DropdownMenuItem(
+                    text = {
+                        Text(
+                            stringResource(
+                                if (allEnabled) R.string.calendars_disable_all
+                                else R.string.calendars_enable_all,
+                            ),
+                        )
+                    },
+                    leadingIcon = {
+                        Icon(
+                            if (allEnabled) Icons.Default.VisibilityOff else Icons.Default.Visibility,
+                            contentDescription = null,
+                        )
+                    },
+                    onClick = {
+                        open = false
+                        onToggleAll(!allEnabled)
+                    },
+                )
+                HorizontalDivider(Modifier.padding(horizontal = 12.dp, vertical = 4.dp))
+            }
+            DropdownMenuItem(
+                text = { Text(manageLabel) },
+                leadingIcon = { Icon(manageIcon, contentDescription = null) },
+                onClick = {
+                    open = false
+                    onManage()
+                },
             )
-        OutlinedButton(onClick = {
-            runCatching { context.startActivity(sourceAppIntent(context, accountType)) }
-        }) {
-            Icon(Icons.Default.OpenInNew, contentDescription = null, modifier = Modifier.size(16.dp))
-            Spacer(Modifier.width(6.dp))
-            Text(stringResource(R.string.calendars_manage_in_app))
         }
     }
 }
 
-/** Neutral circular chip carrying an arbitrary icon — matches [AddAvatar]'s shape. */
+/**
+ * The source app's launcher icon (Google Calendar, DAVx5, Nextcloud, …) as a
+ * round 40dp chip, so each synced account is recognisable at a glance. We load
+ * whatever app owns the account from [PackageManager] rather than bundling brand
+ * logos — always accurate, nothing to license. Falls back to a neutral cloud
+ * chip when no installed app resolves for the account.
+ */
+@Composable
+private fun SourceLogo(accountType: String) {
+    val context = LocalContext.current
+    val logo = remember(accountType) { sourceAppLogo(context, accountType) }
+    if (logo != null) {
+        Image(
+            bitmap = logo,
+            contentDescription = null,
+            contentScale = ContentScale.Crop,
+            modifier = Modifier
+                .size(40.dp)
+                .clip(CircleShape),
+        )
+    } else {
+        LeadingAvatar(Icons.Default.Cloud)
+    }
+}
+
+/** The launcher icon of the app backing [accountType], preferring the human-facing app. */
+private fun sourceAppLogo(context: Context, accountType: String): ImageBitmap? {
+    val pm = context.packageManager
+    val candidates = buildList {
+        curatedSourcePackage(accountType)?.let { add(it) }
+        AccountManager.get(context).authenticatorTypes
+            .firstOrNull { it.type.equals(accountType, ignoreCase = true) }
+            ?.packageName
+            ?.let { add(it) }
+    }
+    for (pkg in candidates) {
+        val bitmap = runCatching { pm.getApplicationIcon(pkg).toBitmap() }.getOrNull()
+        if (bitmap != null) return bitmap.asImageBitmap()
+    }
+    return null
+}
+
+/** Neutral circular chip carrying an arbitrary icon (e.g. the local-device mark). */
 @Composable
 private fun LeadingAvatar(icon: ImageVector) {
     Box(
@@ -542,25 +803,6 @@ private fun LeadingAvatar(icon: ImageVector) {
     }
 }
 
-/** 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(
@@ -581,6 +823,95 @@ private fun HintText(text: String) {
     )
 }
 
+/** Readable name of the persisted backup folder, resolved from its tree Uri. */
+@Composable
+private fun rememberFolderName(uriString: String?): String? {
+    val context = LocalContext.current
+    return remember(uriString) {
+        uriString?.let {
+            runCatching { DocumentFile.fromTreeUri(context, it.toUri())?.name }.getOrNull()
+        }
+    }
+}
+
+/** "Every 30 minutes" / "Every 2 hours" / "Every day" — the interval in its largest whole unit. */
+@Composable
+private fun backupIntervalLabel(minutes: Long): String {
+    val duration = when {
+        minutes % MINUTES_PER_WEEK == 0L ->
+            pluralStringResource(R.plurals.duration_weeks, (minutes / MINUTES_PER_WEEK).toInt(), (minutes / MINUTES_PER_WEEK).toInt())
+        minutes % MINUTES_PER_DAY == 0L ->
+            pluralStringResource(R.plurals.duration_days, (minutes / MINUTES_PER_DAY).toInt(), (minutes / MINUTES_PER_DAY).toInt())
+        minutes % 60L == 0L ->
+            pluralStringResource(R.plurals.duration_hours, (minutes / 60L).toInt(), (minutes / 60L).toInt())
+        else ->
+            pluralStringResource(R.plurals.duration_minutes, minutes.toInt(), minutes.toInt())
+    }
+    return stringResource(R.string.calendars_auto_backup_every, duration)
+}
+
+/** "Last backup: 5 minutes ago" / "… failed" / "No automatic backup yet". */
+@Composable
+private fun backupStatusText(status: BackupStatus): String {
+    if (status.lastRun == 0L) return stringResource(R.string.calendars_auto_backup_status_never)
+    val relative = DateUtils.getRelativeTimeSpanString(
+        status.lastRun, System.currentTimeMillis(), DateUtils.MINUTE_IN_MILLIS,
+    ).toString()
+    return if (status.lastSuccess) {
+        stringResource(R.string.calendars_auto_backup_status_ok, relative)
+    } else {
+        stringResource(R.string.calendars_auto_backup_status_failed, relative)
+    }
+}
+
+/** Amount + unit picker for the backup interval (floored at 30 minutes). */
+@Composable
+private fun BackupIntervalDialog(
+    currentMinutes: Long,
+    onConfirm: (Long) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    // minutes-per-unit for each entry; pick the largest unit the current value divides into.
+    val unitMinutes = remember { listOf(1L, 60L, MINUTES_PER_DAY, MINUTES_PER_WEEK) }
+    val units = stringArrayResource(R.array.backup_interval_units).toList()
+    val initialUnit = unitMinutes.indexOfLast { currentMinutes % it == 0L }.coerceAtLeast(0)
+    var amount by rememberSaveable { mutableStateOf((currentMinutes / unitMinutes[initialUnit]).toString()) }
+    var unitIndex by rememberSaveable { mutableStateOf(initialUnit) }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(stringResource(R.string.calendars_auto_backup_interval)) },
+        text = {
+            Column {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    DialogAmountField(value = amount, onValueChange = { amount = it }, placeholder = "1")
+                    Spacer(Modifier.width(12.dp))
+                    DialogUnitDropdown(label = units[unitIndex], entries = units) { unitIndex = it }
+                }
+                Spacer(Modifier.height(8.dp))
+                Text(
+                    text = stringResource(R.string.calendars_auto_backup_interval_min),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        },
+        confirmButton = {
+            TextButton(onClick = {
+                val value = amount.toLongOrNull()?.coerceAtLeast(1L) ?: 1L
+                onConfirm((value * unitMinutes[unitIndex]).coerceAtLeast(SettingsPrefs.MIN_BACKUP_INTERVAL))
+                onDismiss()
+            }) { Text(stringResource(R.string.reminder_custom_set)) }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) { Text(stringResource(R.string.dialog_cancel)) }
+        },
+    )
+}
+
+private const val MINUTES_PER_DAY = 1_440L
+private const val MINUTES_PER_WEEK = 10_080L
+
 /**
  * Pick the app to open for managing a synced calendar's account. The account's
  * own authenticator package (resolved from [AccountManager], no permission

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

@@ -1,13 +1,19 @@
 package de.jeanlucmakiola.calendula.ui.calendars
 
+import android.content.Context
+import android.content.Intent
 import android.net.Uri
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
+import dagger.hilt.android.qualifiers.ApplicationContext
+import de.jeanlucmakiola.calendula.data.backup.BackupScheduler
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
 import de.jeanlucmakiola.calendula.data.di.IoDispatcher
 import de.jeanlucmakiola.calendula.data.ics.IcsExporter
+import de.jeanlucmakiola.calendula.data.prefs.BackupStatus
 import de.jeanlucmakiola.calendula.data.prefs.CalendarPrefs
+import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.ics.IcsWriter
 import kotlinx.coroutines.CoroutineDispatcher
@@ -16,6 +22,7 @@ import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.flow.stateIn
@@ -33,9 +40,11 @@ import javax.inject.Inject
  */
 @HiltViewModel
 class CalendarsViewModel @Inject constructor(
+    @ApplicationContext private val context: Context,
     private val repository: CalendarRepository,
     private val icsExporter: IcsExporter,
     private val prefs: CalendarPrefs,
+    private val settingsPrefs: SettingsPrefs,
     @IoDispatcher private val io: CoroutineDispatcher,
 ) : ViewModel() {
 
@@ -63,6 +72,22 @@ class CalendarsViewModel @Inject constructor(
                 initialValue = emptySet(),
             )
 
+    /** Automatic-backup settings + last-run status, for the Backup section UI. */
+    val autoBackup: StateFlow<AutoBackupUiState> = combine(
+        settingsPrefs.autoBackupEnabled,
+        settingsPrefs.autoBackupIntervalMinutes,
+        settingsPrefs.autoBackupFolderUri,
+        settingsPrefs.autoBackupStatus,
+    ) { enabled, interval, folder, status ->
+        AutoBackupUiState(enabled, interval, folder, status)
+    }
+        .flowOn(io)
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5_000L),
+            initialValue = AutoBackupUiState(),
+        )
+
     private val _error = MutableStateFlow(false)
     val error: StateFlow<Boolean> = _error.asStateFlow()
 
@@ -123,6 +148,63 @@ class CalendarsViewModel @Inject constructor(
         }
     }
 
+    /**
+     * Enable or disable every calendar of one account in a single write — the
+     * "toggle all" affordance on an account header. Done as one set update so the
+     * per-calendar [setDisabled] calls can't race each other.
+     */
+    fun setAccountDisabled(ids: Collection<Long>, disabled: Boolean) {
+        viewModelScope.launch {
+            val current = prefs.disabledCalendarIds.first()
+            val next = if (disabled) current + ids else current - ids.toSet()
+            if (next != current) prefs.setDisabledCalendarIds(next)
+        }
+    }
+
+    // --- Automatic backup (issue #8) ------------------------------------
+
+    fun setAutoBackupEnabled(enabled: Boolean) {
+        viewModelScope.launch {
+            settingsPrefs.setAutoBackupEnabled(enabled)
+            reschedule()
+            // Give immediate feedback when turning it on with a folder already set.
+            if (enabled && settingsPrefs.autoBackupFolderUri.first() != null) {
+                BackupScheduler.runNow(context)
+            }
+        }
+    }
+
+    fun setAutoBackupIntervalMinutes(minutes: Long) {
+        viewModelScope.launch {
+            settingsPrefs.setAutoBackupIntervalMinutes(minutes)
+            reschedule()
+        }
+    }
+
+    /** Persist the chosen destination folder (taking a durable write grant) and run once. */
+    fun setAutoBackupFolder(uri: Uri) {
+        viewModelScope.launch {
+            runCatching {
+                context.contentResolver.takePersistableUriPermission(
+                    uri,
+                    Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION,
+                )
+            }
+            settingsPrefs.setAutoBackupFolderUri(uri.toString())
+            reschedule()
+            if (settingsPrefs.autoBackupEnabled.first()) BackupScheduler.runNow(context)
+        }
+    }
+
+    private suspend fun reschedule() {
+        BackupScheduler.apply(
+            context = context,
+            enabled = settingsPrefs.autoBackupEnabled.first(),
+            intervalMinutes = settingsPrefs.autoBackupIntervalMinutes.first(),
+            hasFolder = settingsPrefs.autoBackupFolderUri.first() != null,
+        )
+    }
+
     private inline fun write(crossinline block: suspend () -> Unit) {
         viewModelScope.launch {
             try {
@@ -136,6 +218,14 @@ class CalendarsViewModel @Inject constructor(
     }
 }
 
+/** Automatic-backup settings + last-run status for the Backup section. */
+data class AutoBackupUiState(
+    val enabled: Boolean = false,
+    val intervalMinutes: Long = SettingsPrefs.DEFAULT_BACKUP_INTERVAL,
+    val folderUri: String? = null,
+    val status: BackupStatus = BackupStatus(lastRun = 0L, lastSuccess = true, consecutiveFailures = 0),
+)
+
 /** Outcome of a whole-calendar backup, surfaced once to the screen. */
 sealed interface BackupResult {
     data class Success(val eventCount: Int) : BackupResult

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

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

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

@@ -37,6 +37,9 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.ui.filter.CalendarFilterList
+import de.jeanlucmakiola.floret.components.GroupedRow
+import de.jeanlucmakiola.floret.components.Position
+import de.jeanlucmakiola.floret.components.positionOf
 import kotlinx.datetime.LocalDate
 
 /**

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

@@ -1,56 +1,26 @@
 package de.jeanlucmakiola.calendula.ui.common
 
-import android.provider.Settings
-import androidx.activity.BackEventCompat
-import androidx.activity.compose.PredictiveBackHandler
 import androidx.compose.animation.ContentTransform
-import androidx.compose.animation.EnterTransition
-import androidx.compose.animation.ExitTransition
-import androidx.compose.animation.core.Animatable
-import androidx.compose.animation.core.FastOutSlowInEasing
 import androidx.compose.animation.core.FiniteAnimationSpec
-import androidx.compose.animation.expandVertically
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
-import androidx.compose.animation.shrinkVertically
 import androidx.compose.animation.slideInHorizontally
-import androidx.compose.animation.slideInVertically
 import androidx.compose.animation.slideOutHorizontally
 import androidx.compose.animation.togetherWith
-import androidx.compose.foundation.lazy.LazyItemScope
-import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.graphicsLayer
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.IntOffset
-import androidx.compose.ui.unit.dp
-import kotlin.coroutines.cancellation.CancellationException
 
 /**
- * Whether the user has asked the system to remove animations (Settings →
+ * Calendar-specific motion. The family's generic content transitions — section
- * Accessibility → "Remove animations", which sets the global animator duration
+ * expand/collapse, item reveal, list relayout, cross-fade, predictive-back, and
- * scale to 0). Compose animations do *not* honour this platform flag on their
+ * the reduce-motion check — now live in floret-kit's identity module
- * own, so the shared motion helpers in this file check it and fall back to a
+ * (`expandEnter`, `collapseExit`, `itemEnter`, `animateItemMotion`,
- * quick cross-fade — opacity only, no spatial movement — to respect the
+ * `fadeThrough`, `Modifier.predictiveBack`, `rememberReduceMotion`). What stays
- * vestibular intent of the setting while keeping state changes legible.
+ * here is only what's specific to paging the calendar grid: the directional
- *
+ * month/week/day slide and the specs that feed it.
- * Read once at composition; the scale changes rarely and only takes full effect
- * after a process restart anyway.
  */
-@Composable
-fun rememberReduceMotion(): Boolean {
-    val resolver = LocalContext.current.contentResolver
-    return remember(resolver) {
-        Settings.Global.getFloat(resolver, Settings.Global.ANIMATOR_DURATION_SCALE, 1f) == 0f
-    }
-}
 
 /**
  * The M3 Expressive spatial spring used for the month/week slide: the *fast*
@@ -98,128 +68,3 @@ fun calendarSlideTransition(
     return slideInHorizontally(spec) { w -> dir * w }
         .togetherWith(slideOutHorizontally(spec) { w -> -dir * w })
 }
-
-/**
- * Cross-fade [ContentTransform] for swapping whole screens or content blocks
- * where there is no meaningful spatial direction (e.g. onboarding gates). Pure
- * opacity, so it doubles as its own reduced-motion form.
- */
-@OptIn(ExperimentalMaterial3ExpressiveApi::class)
-@Composable
-fun calendarFadeThrough(): ContentTransform {
-    val fade = MaterialTheme.motionScheme.fastEffectsSpec<Float>()
-    return fadeIn(fade).togetherWith(fadeOut(fade))
-}
-
-/**
- * Enter transition for a vertically-revealed section (expandable rows, inline
- * fields): height grows from the top while fading in. Under reduced motion the
- * height growth is dropped, leaving a quick fade.
- *
- * Pair with [calendarCollapseExit]. This is the promoted form of the pattern
- * originally inlined in the event edit form, so every expandable surface in the
- * app reveals the same way.
- */
-@OptIn(ExperimentalMaterial3ExpressiveApi::class)
-@Composable
-fun calendarExpandEnter(reduceMotion: Boolean = rememberReduceMotion()): EnterTransition {
-    val fade = fadeIn(MaterialTheme.motionScheme.fastEffectsSpec())
-    return if (reduceMotion) {
-        fade
-    } else {
-        expandVertically(MaterialTheme.motionScheme.fastSpatialSpec()) + fade
-    }
-}
-
-/** Exit counterpart to [calendarExpandEnter]: shrink + fade, or fade only under reduced motion. */
-@OptIn(ExperimentalMaterial3ExpressiveApi::class)
-@Composable
-fun calendarCollapseExit(reduceMotion: Boolean = rememberReduceMotion()): ExitTransition {
-    val fade = fadeOut(MaterialTheme.motionScheme.fastEffectsSpec())
-    return if (reduceMotion) {
-        fade
-    } else {
-        shrinkVertically(MaterialTheme.motionScheme.fastSpatialSpec()) + fade
-    }
-}
-
-/**
- * Enter transition for content revealed by an `AnimatedContent`/`AnimatedVisibility`
- * (e.g. search results once a query resolves): a gentle rise + fade. Reduced
- * motion keeps the fade only.
- */
-@OptIn(ExperimentalMaterial3ExpressiveApi::class)
-@Composable
-fun calendarItemEnter(reduceMotion: Boolean = rememberReduceMotion()): EnterTransition {
-    val fade = fadeIn(MaterialTheme.motionScheme.fastEffectsSpec())
-    return if (reduceMotion) {
-        fade
-    } else {
-        fade + slideInVertically(MaterialTheme.motionScheme.fastSpatialSpec()) { h -> h / 6 }
-    }
-}
-
-/**
- * Shared [LazyItemScope.animateItem] wiring so list rows fade/relocate with the
- * app's motion scheme instead of Compose's default spring. Returns a bare
- * [Modifier] under reduced motion so rows snap into place. Requires the list to
- * supply stable item keys.
- */
-@OptIn(ExperimentalMaterial3ExpressiveApi::class)
-@Composable
-fun LazyItemScope.calendarAnimateItem(reduceMotion: Boolean = rememberReduceMotion()): Modifier =
-    if (reduceMotion) {
-        Modifier
-    } else {
-        Modifier.animateItem(
-            fadeInSpec = MaterialTheme.motionScheme.fastEffectsSpec(),
-            placementSpec = MaterialTheme.motionScheme.fastSpatialSpec(),
-            fadeOutSpec = MaterialTheme.motionScheme.fastEffectsSpec(),
-        )
-    }
-
-/**
- * Standard Android predictive-back transform for a full-screen overlay: as the
- * back gesture is dragged, the surface scales toward ~90%, shifts toward the
- * swiped edge and rounds its corners, previewing what's behind. Completing the
- * gesture invokes [onBack]; cancelling springs it back.
- *
- * A drop-in replacement for a screen's own `BackHandler(onBack)` — register it
- * once and apply the returned [Modifier] to that screen's root so the preview
- * respects the same back semantics. Under reduced motion the visual preview is
- * skipped (the back still works); on API < 34 the system delivers no progress,
- * so it degrades to a plain back.
- */
-@Composable
-fun Modifier.predictiveBack(
-    onBack: () -> Unit,
-    enabled: Boolean = true,
-    reduceMotion: Boolean = rememberReduceMotion(),
-): Modifier {
-    val progress = remember { Animatable(0f) }
-    var fromLeftEdge by remember { mutableStateOf(true) }
-
-    PredictiveBackHandler(enabled = enabled) { events ->
-        try {
-            events.collect { event ->
-                fromLeftEdge = event.swipeEdge == BackEventCompat.EDGE_LEFT
-                progress.snapTo(FastOutSlowInEasing.transform(event.progress))
-            }
-            onBack()
-            progress.snapTo(0f)
-        } catch (_: CancellationException) {
-            progress.animateTo(0f)
-        }
-    }
-
-    if (reduceMotion) return this
-    return this.graphicsLayer {
-        val p = progress.value
-        val scale = 1f - 0.1f * p
-        scaleX = scale
-        scaleY = scale
-        translationX = (if (fromLeftEdge) 1f else -1f) * 24.dp.toPx() * p
-        shape = RoundedCornerShape(32.dp.toPx() * p)
-        clip = p > 0f
-    }
-}

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

@@ -20,6 +20,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
+import de.jeanlucmakiola.floret.components.pastelize
 
 /**
  * A wrapping row of round colour swatches; the one matching [selected] is

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

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

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

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

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

@@ -1,217 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.common
-
-import androidx.compose.animation.core.animateDpAsState
-import androidx.compose.foundation.background
-import androidx.compose.foundation.interaction.MutableInteractionSource
-import androidx.compose.foundation.interaction.collectIsPressedAsState
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.ColumnScope
-import androidx.compose.foundation.layout.RowScope
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.consumeWindowInsets
-import androidx.compose.foundation.layout.heightIn
-import androidx.compose.foundation.layout.imePadding
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.rememberScrollState
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.foundation.verticalScroll
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.filled.ArrowBack
-import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
-import androidx.compose.material3.LargeTopAppBar
-import androidx.compose.material3.ListItem
-import androidx.compose.material3.ListItemDefaults
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Scaffold
-import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
-import androidx.compose.material3.TopAppBarDefaults
-import androidx.compose.material3.rememberTopAppBarState
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.remember
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.input.nestedscroll.nestedScroll
-import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.unit.Dp
-import androidx.compose.ui.unit.dp
-import de.jeanlucmakiola.calendula.R
-
-/**
- * Position of a row within a grouped list, after the Android-15 settings
- * pattern: a run of rows shares one rounded container, with full corners at the
- * group's outer edges and small corners between, separated by small gaps.
- */
-enum class Position { Top, Middle, Bottom, Alone }
-
-/** Maps an index within a group of [count] rows to its [Position]. */
-fun positionOf(index: Int, count: Int): Position = when {
-    count <= 1 -> Position.Alone
-    index == 0 -> Position.Top
-    index == count - 1 -> Position.Bottom
-    else -> Position.Middle
-}
-
-/**
- * The app's standard full-screen list scaffold: a collapsing [LargeTopAppBar]
- * whose title shrinks into the bar (next to the back button) as the content
- * scrolls. Content is a scrollable column that feeds the toolbar via nested
- * scroll. Used by Settings and the calendar manager so they share one shell.
- */
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-fun CollapsingScaffold(
-    title: String,
-    onBack: () -> Unit,
-    modifier: Modifier = Modifier,
-    snackbarHost: @Composable () -> Unit = {},
-    actions: @Composable RowScope.() -> Unit = {},
-    content: @Composable ColumnScope.() -> Unit,
-) {
-    val scrollBehavior =
-        TopAppBarDefaults.exitUntilCollapsedScrollBehavior(rememberTopAppBarState())
-    Scaffold(
-        modifier = modifier
-            .predictiveBack(onBack = onBack)
-            .fillMaxSize()
-            .background(MaterialTheme.colorScheme.surface)
-            .nestedScroll(scrollBehavior.nestedScrollConnection),
-        topBar = {
-            LargeTopAppBar(
-                title = { Text(title) },
-                navigationIcon = {
-                    IconButton(onClick = onBack) {
-                        Icon(
-                            Icons.AutoMirrored.Filled.ArrowBack,
-                            contentDescription = stringResource(R.string.settings_back),
-                        )
-                    }
-                },
-                actions = actions,
-                scrollBehavior = scrollBehavior,
-                colors = TopAppBarDefaults.topAppBarColors(
-                    scrolledContainerColor = MaterialTheme.colorScheme.surface,
-                ),
-            )
-        },
-        snackbarHost = snackbarHost,
-    ) { innerPadding ->
-        Column(
-            modifier = Modifier
-                .padding(innerPadding)
-                // Mark the scaffold's system-bar insets as consumed so the
-                // imePadding below adds only the keyboard height beyond them
-                // (max, not sum) — otherwise the nav-bar inset double-counts and
-                // leaves an empty strip above the keyboard.
-                .consumeWindowInsets(innerPadding)
-                .fillMaxSize()
-                // Paint the surface across the full area before imePadding carves
-                // into it, so any sliver above the keyboard reads as surface — not
-                // the dialog window's black — during the IME animation.
-                .background(MaterialTheme.colorScheme.surface)
-                // Shrink the scroll viewport by the keyboard inset so a focused
-                // field (e.g. the custom-reminder amount) can scroll into view.
-                .imePadding()
-                .verticalScroll(rememberScrollState())
-                .padding(top = 8.dp, bottom = 24.dp),
-            content = content,
-        )
-    }
-}
-
-/**
- * One row in a grouped list: an M3 [ListItem] over a tonal [Surface] whose
- * corner radii come from its [position] (so a run of rows reads as a single
- * rounded card). Corners round further on press. A null [onClick] makes the
- * row non-interactive (e.g. read-only entries). [dimmed] fades the headline and
- * summary to the M3 disabled emphasis while leaving the [trailing] control at
- * full opacity — for rows that are present but switched off.
- */
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-fun GroupedRow(
-    title: String,
-    position: Position,
-    modifier: Modifier = Modifier,
-    summary: String? = null,
-    selected: Boolean = false,
-    dimmed: 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 if (dimmed) {
-        // M3 disabled emphasis (0.38α) on the text/leading; the trailing control
-        // stays full-opacity so the toggle reads as live even on a faded row.
-        val muted = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.38f)
-        ListItemDefaults.colors(
-            containerColor = Color.Transparent,
-            headlineColor = muted,
-            leadingIconColor = muted,
-            supportingColor = muted,
-        )
-    } else {
-        ListItemDefaults.colors(containerColor = Color.Transparent)
-    }
-    val item: @Composable () -> Unit = {
-        ListItem(
-            headlineContent = { Text(title) },
-            supportingContent = summary?.let { text -> { Text(text) } },
-            leadingContent = leading,
-            trailingContent = trailing,
-            colors = itemColors,
-            modifier = Modifier.heightIn(min = minHeight),
-        )
-    }
-    val base = modifier
-        .fillMaxWidth()
-        .padding(horizontal = 16.dp)
-        .then(gap)
-    val containerColor = if (selected) {
-        MaterialTheme.colorScheme.secondaryContainer
-    } else {
-        MaterialTheme.colorScheme.surfaceContainerHigh
-    }
-    if (onClick != null) {
-        Surface(
-            onClick = onClick,
-            color = containerColor,
-            shape = shape,
-            interactionSource = interaction,
-            modifier = base,
-        ) { item() }
-    } else {
-        Surface(color = containerColor, shape = shape, modifier = base) { item() }
-    }
-}

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

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

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

@@ -1,83 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.common
-
-import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.text.BasicTextField
-import androidx.compose.foundation.text.KeyboardActions
-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.ImeAction
-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,
-    imeAction: ImeAction = ImeAction.Default,
-    /** Invoked when the IME action key (e.g. Done) is pressed. */
-    onImeAction: (() -> Unit)? = null,
-) {
-    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,
-            imeAction = imeAction,
-        ),
-        keyboardActions = onImeAction?.let { action ->
-            KeyboardActions(onAny = { action() })
-        } ?: KeyboardActions.Default,
-        cursorBrush = SolidColor(MaterialTheme.colorScheme.primary),
-        decorationBox = { innerTextField ->
-            Box {
-                if (value.isEmpty()) {
-                    // Clearly fainter than typed text, so a hint never reads as
-                    // prefilled content.
-                    Text(
-                        text = placeholder,
-                        style = resolvedStyle,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.5f),
-                    )
-                }
-                innerTextField()
-            }
-        },
-        modifier = modifier,
-    )
-}

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

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

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

@@ -3,10 +3,10 @@ package de.jeanlucmakiola.calendula.ui.common
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.ColumnScope
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -20,122 +20,60 @@ import androidx.compose.material3.SegmentedButtonDefaults
 import androidx.compose.material3.SingleChoiceSegmentedButtonRow
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
-import android.view.WindowManager
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.SideEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalView
+import androidx.compose.ui.res.pluralStringResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
-import androidx.compose.ui.window.Dialog
-import androidx.compose.ui.window.DialogProperties
-import androidx.compose.ui.window.DialogWindowProvider
 import de.jeanlucmakiola.calendula.R
-import de.jeanlucmakiola.calendula.data.prefs.CalendarReminderOverride
+import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
-
+import de.jeanlucmakiola.floret.components.DialogAmountField
-/**
+import de.jeanlucmakiola.floret.components.FullScreenPicker
- * Shared full-screen scaffold for selection pickers: a full-bleed [Dialog] that
+import de.jeanlucmakiola.floret.components.GroupedRow
- * reuses the app's [CollapsingScaffold] (collapsing title + back button), so a
+import de.jeanlucmakiola.floret.components.Position
- * picker is visually identical to a Settings sub-page and uses the full width.
+import de.jeanlucmakiola.floret.components.positionOf
- * [content] places the connected grouped rows; selecting one calls [onDismiss].
+import de.jeanlucmakiola.floret.identity.collapseExit
- */
+import de.jeanlucmakiola.floret.identity.expandEnter
-@Composable
+import de.jeanlucmakiola.floret.reminders.ReminderOverride
-fun FullScreenPicker(
+import de.jeanlucmakiola.floret.reminders.ReminderUnit
-    title: String,
+import de.jeanlucmakiola.floret.reminders.decomposeReminderMinutes
-    onDismiss: () -> Unit,
-    content: @Composable ColumnScope.() -> Unit,
-) {
-    Dialog(
-        onDismissRequest = onDismiss,
-        properties = DialogProperties(
-            usePlatformDefaultWidth = false,
-            decorFitsSystemWindows = false,
-        ),
-    ) {
-        // The dialog window pans by default when the keyboard opens, which —
-        // combined with the content's own imePadding — leaves a fixed black gap
-        // above the keyboard. Switch it to ADJUST_NOTHING so the window stays
-        // full-screen and imePadding alone lifts the focused field.
-        val view = LocalView.current
-        SideEffect {
-            (view.parent as? DialogWindowProvider)?.window
-                ?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING)
-        }
-        CollapsingScaffold(title = title, onBack = onDismiss, content = content)
-    }
-}
-
-/**
- * General single-select picker, full-screen: each option is a connected grouped
- * row and the current one carries a check. Drop-in for the former dialog
- * (theme, week start, language, …).
- */
-@Composable
-fun <T> OptionPicker(
-    title: String,
-    options: List<T>,
-    selected: T,
-    label: @Composable (T) -> String,
-    onSelect: (T) -> Unit,
-    onDismiss: () -> Unit,
-) {
-    FullScreenPicker(title = title, onDismiss = onDismiss) {
-        options.forEachIndexed { index, option ->
-            val isSelected = option == selected
-            GroupedRow(
-                title = label(option),
-                position = positionOf(index, options.size),
-                selected = isSelected,
-                trailing = if (isSelected) {
-                    { SelectedCheck() }
-                } else {
-                    null
-                },
-                onClick = {
-                    onSelect(option)
-                    onDismiss()
-                },
-            )
-        }
-    }
-}
 
 /**
  * Reminder-default picker, full-screen: the grouped list (with an optional "Use
  * default reminder" row and a "None" row), the [presets] as lead-time rows, and
  * a "Custom" row that expands an inline number field plus a segmented unit
- * selector. Returns the choice as a [CalendarReminderOverride].
+ * selector. Returns the choice as a [ReminderOverride].
  */
 @Composable
 fun ReminderDefaultPicker(
     title: String,
     presets: List<Int>,
-    selected: CalendarReminderOverride,
+    selected: ReminderOverride,
     allowInherit: Boolean,
-    onSelect: (CalendarReminderOverride) -> Unit,
+    onSelect: (ReminderOverride) -> Unit,
     onDismiss: () -> Unit,
 ) {
-    val selectedMinutes = (selected as? CalendarReminderOverride.Minutes)?.minutes
+    val selectedMinutes = (selected as? ReminderOverride.Minutes)?.minutes
     val customSelected = selectedMinutes != null && selectedMinutes !in presets
-    val seed = decomposeReminder(selectedMinutes?.takeIf { customSelected })
+    val seed = decomposeReminderMinutes(selectedMinutes?.takeIf { customSelected })
 
     var customExpanded by rememberSaveable { mutableStateOf(false) }
-    var amountText by rememberSaveable { mutableStateOf(seed.first) }
+    var amountText by rememberSaveable { mutableStateOf(seed.amount?.toString() ?: "") }
-    var unit by rememberSaveable { mutableStateOf(seed.second) }
+    var unit by rememberSaveable { mutableStateOf(seed.unit) }
 
     val options = buildList {
-        if (allowInherit) add(CalendarReminderOverride.Inherit)
+        if (allowInherit) add(ReminderOverride.Inherit)
-        add(CalendarReminderOverride.None)
+        add(ReminderOverride.None)
-        presets.forEach { add(CalendarReminderOverride.Minutes(it)) }
+        presets.forEach { add(ReminderOverride.Minutes(it)) }
     }
     val rowCount = options.size + 1 // + the custom row
 
-    FullScreenPicker(title = title, onDismiss = onDismiss) {
+    FullScreenPicker(title = title, onDismiss = onDismiss, predictiveBack = true) {
         options.forEachIndexed { index, option ->
             val isSelected = option == selected
             GroupedRow(
@@ -175,8 +113,8 @@ fun ReminderDefaultPicker(
         )
         AnimatedVisibility(
             visible = customExpanded,
-            enter = calendarExpandEnter(),
+            enter = expandEnter(),
-            exit = calendarCollapseExit(),
+            exit = collapseExit(),
         ) {
             CustomReminderEditor(
                 amountText = amountText,
@@ -184,7 +122,7 @@ fun ReminderDefaultPicker(
                 unit = unit,
                 onUnitChange = { unit = it },
                 onConfirm = { minutes ->
-                    onSelect(CalendarReminderOverride.Minutes(minutes))
+                    onSelect(ReminderOverride.Minutes(minutes))
                     onDismiss()
                 },
             )
@@ -260,6 +198,17 @@ private fun CustomReminderEditor(
     }
 }
 
+/** A short explanatory paragraph shown under a picker's title, above the rows. */
+@Composable
+private fun PickerDescription(text: String) {
+    Text(
+        text = text,
+        style = MaterialTheme.typography.bodyMedium,
+        color = MaterialTheme.colorScheme.onSurfaceVariant,
+        modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp),
+    )
+}
+
 @Composable
 private fun SelectedCheck() {
     Icon(
@@ -269,18 +218,152 @@ private fun SelectedCheck() {
     )
 }
 
+/**
+ * Agenda-range picker, full-screen. Two grouped lists — the calendar-aligned
+ * options (today / this week / this month) and the rolling windows (next 7 / 30
+ * days), with a "Custom" row that expands an inline day-count editor (1–365).
+ * Mirrors [ReminderDefaultPicker]'s custom-expand pattern.
+ */
 @Composable
-private fun reminderOverrideLabel(override: CalendarReminderOverride): String = when (override) {
+fun AgendaRangePicker(
-    CalendarReminderOverride.Inherit -> stringResource(R.string.reminder_use_default)
+    title: String,
-    CalendarReminderOverride.None -> stringResource(R.string.reminder_none)
+    description: String,
-    is CalendarReminderOverride.Minutes -> reminderLeadTimeLabel(override.minutes)
+    selected: AgendaRange,
+    onSelect: (AgendaRange) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    val calendarAligned = listOf(AgendaRange.Day, AgendaRange.ThisWeek, AgendaRange.ThisMonth)
+    val rolling = listOf(AgendaRange.Week, AgendaRange.Month)
+    val rollingRowCount = rolling.size + 1 // + the custom row
+    val customSelected = selected is AgendaRange.Custom
+
+    var customExpanded by rememberSaveable { mutableStateOf(false) }
+    var amountText by rememberSaveable {
+        mutableStateOf((selected as? AgendaRange.Custom)?.days?.toString() ?: "")
+    }
+
+    val rangeRow: @Composable (AgendaRange, Position) -> Unit = { option, position ->
+        val isSelected = option == selected
+        GroupedRow(
+            title = agendaRangeLabel(option),
+            position = position,
+            selected = isSelected,
+            trailing = if (isSelected) {
+                { SelectedCheck() }
+            } else {
+                null
+            },
+            onClick = {
+                onSelect(option)
+                onDismiss()
+            },
+        )
+    }
+
+    FullScreenPicker(title = title, onDismiss = onDismiss, predictiveBack = true) {
+        PickerDescription(description)
+
+        // Calendar-aligned windows.
+        calendarAligned.forEachIndexed { index, option ->
+            rangeRow(option, positionOf(index, calendarAligned.size))
+        }
+
+        Spacer(Modifier.height(12.dp))
+
+        // Rolling windows + custom.
+        rolling.forEachIndexed { index, option ->
+            rangeRow(option, positionOf(index, rollingRowCount))
+        }
+        GroupedRow(
+            title = if (customSelected) {
+                agendaRangeLabel(selected)
+            } else {
+                stringResource(R.string.agenda_range_custom)
+            },
+            position = if (customExpanded) Position.Top else positionOf(rolling.size, rollingRowCount),
+            selected = customSelected,
+            trailing = if (customSelected) {
+                { SelectedCheck() }
+            } else {
+                null
+            },
+            onClick = { customExpanded = !customExpanded },
+        )
+        AnimatedVisibility(
+            visible = customExpanded,
+            enter = expandEnter(),
+            exit = collapseExit(),
+        ) {
+            CustomDaysEditor(
+                amountText = amountText,
+                onAmountChange = { amountText = it },
+                onConfirm = { days ->
+                    onSelect(AgendaRange.Custom(days))
+                    onDismiss()
+                },
+            )
+        }
+    }
 }
 
-/** Seed the custom editor: the largest exact unit for [minutes] (null → empty). */
+/** The expanded "Custom" day-count editor: an amount field (1–365) and Set. */
-private fun decomposeReminder(minutes: Int?): Pair<String, ReminderUnit> = when {
+@Composable
-    minutes == null -> "" to ReminderUnit.Minutes
+private fun CustomDaysEditor(
-    minutes % 10_080 == 0 -> (minutes / 10_080).toString() to ReminderUnit.Weeks
+    amountText: String,
-    minutes % 1_440 == 0 -> (minutes / 1_440).toString() to ReminderUnit.Days
+    onAmountChange: (String) -> Unit,
-    minutes % 60 == 0 -> (minutes / 60).toString() to ReminderUnit.Hours
+    onConfirm: (Int) -> Unit,
-    else -> minutes.toString() to ReminderUnit.Minutes
+) {
+    val days = amountText.toIntOrNull()
+        ?.takeIf { it in AgendaRange.MIN_CUSTOM_DAYS..AgendaRange.MAX_CUSTOM_DAYS }
+    Surface(
+        color = MaterialTheme.colorScheme.surfaceContainerHigh,
+        shape = RoundedCornerShape(topStart = 6.dp, topEnd = 6.dp, bottomStart = 22.dp, bottomEnd = 22.dp),
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(horizontal = 16.dp),
+    ) {
+        Row(
+            modifier = Modifier.padding(16.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            DialogAmountField(
+                value = amountText,
+                onValueChange = onAmountChange,
+                placeholder = "30",
+            )
+            Spacer(Modifier.width(16.dp))
+            Text(
+                text = days?.let { pluralStringResource(R.plurals.agenda_range_days, it, it) }
+                    ?: stringResource(R.string.agenda_range_custom_hint),
+                style = MaterialTheme.typography.bodyLarge,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.weight(1f),
+            )
+            Spacer(Modifier.width(16.dp))
+            FilledTonalButton(
+                onClick = { days?.let(onConfirm) },
+                enabled = days != null,
+            ) {
+                Text(stringResource(R.string.reminder_custom_set))
+            }
+        }
+    }
+}
+
+/** Human label for an [AgendaRange] (used by the picker rows and settings summary). */
+@Composable
+fun agendaRangeLabel(range: AgendaRange): String = when (range) {
+    AgendaRange.Day -> stringResource(R.string.agenda_range_day)
+    AgendaRange.ThisWeek -> stringResource(R.string.agenda_range_this_week)
+    AgendaRange.ThisMonth -> stringResource(R.string.agenda_range_this_month)
+    AgendaRange.Week -> stringResource(R.string.agenda_range_week)
+    AgendaRange.Month -> stringResource(R.string.agenda_range_month)
+    is AgendaRange.Custom -> pluralStringResource(R.plurals.agenda_range_days, range.days, range.days)
+}
+
+@Composable
+private fun reminderOverrideLabel(override: ReminderOverride): String = when (override) {
+    ReminderOverride.Inherit -> stringResource(R.string.reminder_use_default)
+    ReminderOverride.None -> stringResource(R.string.reminder_none)
+    is ReminderOverride.Minutes -> reminderLeadTimeLabel(override.minutes)
 }

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

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

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

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

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

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

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

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

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

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

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

@@ -76,11 +76,16 @@ import de.jeanlucmakiola.calendula.ui.common.NowLine
 import de.jeanlucmakiola.calendula.ui.common.ViewSwitcherPill
 import de.jeanlucmakiola.calendula.ui.common.calendarSlideTransition
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarFadeSpec
-import de.jeanlucmakiola.calendula.ui.common.rememberReduceMotion
+import de.jeanlucmakiola.floret.identity.rememberReduceMotion
 import de.jeanlucmakiola.calendula.ui.common.next
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.floret.components.pastelize
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarSlideSpec
-import de.jeanlucmakiola.calendula.ui.week.MINUTES_PER_DAY
+import de.jeanlucmakiola.calendula.ui.common.currentLocale
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
+import de.jeanlucmakiola.calendula.ui.common.LocalShowHourLines
+import de.jeanlucmakiola.calendula.ui.common.formatHourLabel
+import de.jeanlucmakiola.calendula.ui.common.formatMinuteOfDay
+import de.jeanlucmakiola.calendula.ui.common.hourSeparatorLines
 import de.jeanlucmakiola.calendula.ui.week.TimedBlock
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
@@ -466,6 +471,8 @@ private fun Timeline(
 ) {
     val totalHeight = HOUR_HEIGHT * 24
     val dark = isSystemInDarkTheme()
+    val use24Hour = LocalUse24HourFormat.current
+    val locale = currentLocale()
 
     Box(modifier = Modifier.fillMaxSize()) {
         // Gutter and day column are two scroll viewports that SHARE one scroll
@@ -488,7 +495,7 @@ private fun Timeline(
                     ) {
                         if (h > 0) {
                             Text(
-                                text = "%02d".format(h),
+                                text = formatHourLabel(h, use24Hour, locale),
                                 style = MaterialTheme.typography.labelSmall,
                                 color = MaterialTheme.colorScheme.onSurfaceVariant,
                                 modifier = Modifier
@@ -534,6 +541,8 @@ private fun DayColumnCard(
     modifier: Modifier = Modifier,
 ) {
     val hourPx = with(LocalDensity.current) { HOUR_HEIGHT.toPx() }
+    val showHourLines = LocalShowHourLines.current
+    val hourLineColor = MaterialTheme.colorScheme.outlineVariant
     Card(
         // Plain rectangular column — the soft corners come from the outer
         // rounded scroll viewport, so inner rounding would look odd at the edges.
@@ -546,6 +555,9 @@ private fun DayColumnCard(
         BoxWithConstraints(
             modifier = Modifier
                 .fillMaxSize()
+                // Faint hour separators sit over the column background but under
+                // the event blocks (drawBehind paints before the children).
+                .hourSeparatorLines(showHourLines, hourPx, hourLineColor)
                 // Tap an empty slot to create an event there. Taps on event
                 // blocks are consumed by their own click handler first, so this
                 // only fires on the column background. Snaps to the tapped hour.
@@ -589,7 +601,10 @@ private fun EventBlock(
     modifier: Modifier = Modifier,
 ) {
     val title = block.event.title.ifBlank { stringResource(R.string.event_untitled) }
-    val timeLabel = "${minToHm(block.startMin)}–${minToHm(block.endMin)}"
+    val use24Hour = LocalUse24HourFormat.current
+    val locale = currentLocale()
+    val timeLabel = "${minToHm(block.startMin, use24Hour, locale)}–" +
+        minToHm(block.endMin, use24Hour, locale)
     val showTime = block.endMin - block.startMin >= 45
     Box(
         modifier = modifier
@@ -635,8 +650,8 @@ private fun DayLoading() {
     }
 }
 
-private fun minToHm(min: Int): String =
+private fun minToHm(min: Int, is24Hour: Boolean, locale: Locale): String =
-    if (min >= MINUTES_PER_DAY) "24:00" else "%02d:%02d".format(min / 60, min % 60)
+    formatMinuteOfDay(min, is24Hour, locale)
 
 private fun formatDayTitle(date: LocalDate): String {
     val locale = Locale.getDefault()

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

@@ -91,11 +91,13 @@ import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.EventStatus
 import de.jeanlucmakiola.calendula.domain.RecurringWriteScope
 import de.jeanlucmakiola.calendula.domain.Reminder
-import de.jeanlucmakiola.calendula.ui.common.predictiveBack
+import de.jeanlucmakiola.floret.identity.predictiveBack
 import de.jeanlucmakiola.calendula.ui.common.CalendarFailure
-import de.jeanlucmakiola.calendula.ui.common.OptionCard
+import de.jeanlucmakiola.floret.components.OptionCard
 import de.jeanlucmakiola.calendula.ui.common.currentLocale
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
+import de.jeanlucmakiola.calendula.ui.common.timeOfDayFormatter
+import de.jeanlucmakiola.floret.components.pastelize
 import de.jeanlucmakiola.calendula.ui.common.recurrenceText
 import de.jeanlucmakiola.calendula.ui.common.reminderLeadTimeLabel
 import kotlinx.coroutines.launch
@@ -781,7 +783,7 @@ private fun formatWhen(
     val zid = ZoneId.of(zone.id)
     val dateFull = DateTimeFormatter.ofLocalizedDate(FormatStyle.FULL).withLocale(locale)
     val dateMedium = DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).withLocale(locale)
-    val timeShort = DateTimeFormatter.ofLocalizedTime(FormatStyle.SHORT).withLocale(locale)
+    val timeShort = timeOfDayFormatter(LocalUse24HourFormat.current, locale)
 
     val startLdt = instance.start.toJavaLocalDateTime(zid)
     val allDayLabel = stringResource(R.string.event_detail_all_day)

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

@@ -43,7 +43,6 @@ import androidx.compose.material.icons.filled.EventAvailable
 import androidx.compose.material.icons.filled.Lock
 import androidx.compose.material.icons.filled.Notifications
 import androidx.compose.material.icons.filled.Palette
-import androidx.compose.material.icons.filled.People
 import androidx.compose.material.icons.filled.Person
 import androidx.compose.material.icons.filled.PersonAdd
 import androidx.compose.material.icons.filled.Place
@@ -94,6 +93,7 @@ import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
@@ -115,26 +115,30 @@ 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.calendarCollapseExit
+import de.jeanlucmakiola.floret.identity.collapseExit
-import de.jeanlucmakiola.calendula.ui.common.calendarExpandEnter
+import de.jeanlucmakiola.floret.identity.expandEnter
-import de.jeanlucmakiola.calendula.ui.common.predictiveBack
+import de.jeanlucmakiola.floret.identity.predictiveBack
 import de.jeanlucmakiola.calendula.ui.common.CALENDAR_COLOR_PALETTE
 import de.jeanlucmakiola.calendula.ui.common.CalendarDatePickerDialog
 import de.jeanlucmakiola.calendula.ui.common.ColorSwatchRow
-import de.jeanlucmakiola.calendula.ui.common.DialogAmountField
+import de.jeanlucmakiola.floret.components.DialogAmountField
-import de.jeanlucmakiola.calendula.ui.common.DialogUnitDropdown
+import de.jeanlucmakiola.floret.components.DialogUnitDropdown
+import de.jeanlucmakiola.calendula.ui.common.eventFormFieldIcon
+import de.jeanlucmakiola.calendula.ui.common.eventFormFieldLabel
 import de.jeanlucmakiola.calendula.ui.common.MILLIS_PER_DAY
-import de.jeanlucmakiola.calendula.ui.common.InlineTextField
+import de.jeanlucmakiola.floret.components.InlineTextField
-import de.jeanlucmakiola.calendula.ui.common.OptionCard
+import de.jeanlucmakiola.floret.components.OptionCard
-import de.jeanlucmakiola.calendula.ui.common.Position
+import de.jeanlucmakiola.floret.components.Position
-import de.jeanlucmakiola.calendula.ui.common.positionOf
+import de.jeanlucmakiola.floret.components.positionOf
 import de.jeanlucmakiola.calendula.ui.common.REMINDER_PRESETS
-import de.jeanlucmakiola.calendula.ui.common.ReminderUnit
 import de.jeanlucmakiola.calendula.ui.common.TimePickerAlert
+import de.jeanlucmakiola.floret.reminders.ReminderUnit
 import de.jeanlucmakiola.calendula.ui.common.currentLocale
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
+import de.jeanlucmakiola.calendula.ui.common.timeOfDayFormatter
 import de.jeanlucmakiola.calendula.ui.common.reminderLeadTimeLabel
 import de.jeanlucmakiola.calendula.ui.common.reminderUnitLabel
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.floret.components.pastelize
 import de.jeanlucmakiola.calendula.ui.common.recurrenceText
 import kotlinx.datetime.DayOfWeek
 import kotlinx.datetime.LocalDate
@@ -413,8 +417,8 @@ private fun OptionalFormSection(
 ) {
     AnimatedVisibility(
         visible = visible,
-        enter = calendarExpandEnter(),
+        enter = expandEnter(),
-        exit = calendarCollapseExit(),
+        exit = collapseExit(),
     ) {
         Column(modifier = Modifier.fillMaxWidth(), content = content)
     }
@@ -1017,9 +1021,9 @@ private fun FieldPickerDialog(
             Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
                 hiddenFields.forEach { field ->
                     OptionCard(
-                        label = stringResource(fieldLabel(field)),
+                        label = stringResource(eventFormFieldLabel(field)),
                         onClick = { onSelect(field) },
-                        icon = fieldIcon(field),
+                        icon = eventFormFieldIcon(field),
                     )
                 }
             }
@@ -1566,6 +1570,7 @@ private fun AddGuestInlineCard(
                 value = text,
                 onValueChange = { text = it },
                 placeholder = stringResource(R.string.event_edit_add_guest_hint),
+                capitalization = KeyboardCapitalization.None,
                 keyboardType = KeyboardType.Email,
                 imeAction = ImeAction.Done,
                 onImeAction = { commit() },
@@ -1636,28 +1641,6 @@ private fun readContactAddress(context: Context, uri: Uri): String? =
     }
 
 
-private fun fieldLabel(field: EventFormField): Int = when (field) {
-    EventFormField.Location -> R.string.event_detail_location
-    EventFormField.Description -> R.string.event_detail_description
-    EventFormField.Reminders -> R.string.event_detail_reminders
-    EventFormField.Recurrence -> R.string.event_detail_recurrence
-    EventFormField.Availability -> R.string.event_edit_availability
-    EventFormField.Visibility -> R.string.event_edit_visibility
-    EventFormField.Color -> R.string.event_edit_color
-    EventFormField.Attendees -> R.string.event_edit_attendees
-}
-
-private fun fieldIcon(field: EventFormField): ImageVector = when (field) {
-    EventFormField.Location -> Icons.Default.Place
-    EventFormField.Description -> Icons.AutoMirrored.Filled.Notes
-    EventFormField.Reminders -> Icons.Default.Notifications
-    EventFormField.Recurrence -> Icons.Default.Repeat
-    EventFormField.Availability -> Icons.Default.EventAvailable
-    EventFormField.Visibility -> Icons.Default.Lock
-    EventFormField.Color -> Icons.Default.Palette
-    EventFormField.Attendees -> Icons.Default.People
-}
-
 /**
  * Visibility selector: one card per level, each with its own icon; the
  * current level is highlighted. Tap picks and closes.
@@ -1874,6 +1857,7 @@ private fun InlineField(
         singleLine = singleLine,
         minLines = minLines,
         keyboardType = keyboardType,
+        capitalization = KeyboardCapitalization.None,
     )
 }
 
@@ -1891,8 +1875,9 @@ private fun ScheduleRow(
     val dateFormat = remember(locale) {
         DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).withLocale(locale)
     }
-    val timeFormat = remember(locale) {
+    val use24Hour = LocalUse24HourFormat.current
-        DateTimeFormatter.ofLocalizedTime(FormatStyle.SHORT).withLocale(locale)
+    val timeFormat = remember(locale, use24Hour) {
+        timeOfDayFormatter(use24Hour, locale)
     }
     // Tappable values read as links (primary), like the location on the
     // detail screen; errors flip them to the error colour.

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

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

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

@@ -38,8 +38,8 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.domain.EventForm
 import de.jeanlucmakiola.calendula.domain.ics.IcsParseWarning
-import de.jeanlucmakiola.calendula.ui.common.predictiveBack
+import de.jeanlucmakiola.floret.identity.predictiveBack
-import de.jeanlucmakiola.calendula.ui.common.OptionCard
+import de.jeanlucmakiola.floret.components.OptionCard
 
 /**
  * Handles an opened/received `.ics` file. A single event is handed straight to

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

@@ -67,11 +67,11 @@ import de.jeanlucmakiola.calendula.ui.common.CalendarView
 import de.jeanlucmakiola.calendula.ui.common.ViewSwitcherPill
 import de.jeanlucmakiola.calendula.ui.common.calendarSlideTransition
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarFadeSpec
-import de.jeanlucmakiola.calendula.ui.common.rememberReduceMotion
+import de.jeanlucmakiola.floret.identity.rememberReduceMotion
 import de.jeanlucmakiola.calendula.ui.common.currentLocale
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarSlideSpec
 import de.jeanlucmakiola.calendula.ui.common.next
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.floret.components.pastelize
 import kotlinx.coroutines.launch
 import kotlinx.datetime.DayOfWeek
 import kotlinx.datetime.LocalDate

app/src/main/java/de/jeanlucmakiola/calendula/ui/permission/BrandHero.kt

@@ -0,0 +1,66 @@
+package de.jeanlucmakiola.calendula.ui.permission
+
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.offset
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Lock
+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.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
+
+/**
+ * The app's adaptive launcher mark, reconstructed as a large branded squircle —
+ * the hero of the onboarding screens (floret-kit's OnboardingScaffold supplies
+ * the shell; the mark stays app-local so each sibling keeps its own identity).
+ * A lock badge overlays the corner when permission has been [denied].
+ */
+@Composable
+internal fun BrandHero(denied: Boolean) {
+    Box(contentAlignment = Alignment.Center) {
+        Box(
+            modifier = Modifier
+                .size(128.dp)
+                .clip(RoundedCornerShape(34.dp))
+                .background(colorResource(R.color.ic_launcher_background)),
+        ) {
+            Image(
+                painter = painterResource(R.drawable.ic_launcher_foreground),
+                contentDescription = stringResource(R.string.app_name),
+                modifier = Modifier.fillMaxSize(),
+            )
+        }
+        if (denied) {
+            // A small lock badge sits over the corner to signal "blocked".
+            Box(
+                modifier = Modifier
+                    .align(Alignment.BottomEnd)
+                    .offset(x = 10.dp, y = 10.dp)
+                    .size(44.dp)
+                    .clip(CircleShape)
+                    .background(MaterialTheme.colorScheme.errorContainer),
+                contentAlignment = Alignment.Center,
+            ) {
+                Icon(
+                    imageVector = Icons.Filled.Lock,
+                    contentDescription = null,
+                    tint = MaterialTheme.colorScheme.onErrorContainer,
+                    modifier = Modifier.size(24.dp),
+                )
+            }
+        }
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/permission/OnboardingScaffold.kt

@@ -1,163 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.permission
-
-import androidx.compose.foundation.Image
-import androidx.compose.foundation.background
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.ColumnScope
-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.navigationBarsPadding
-import androidx.compose.foundation.layout.offset
-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.filled.Lock
-import androidx.compose.material3.Icon
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Scaffold
-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.graphics.vector.ImageVector
-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
-
-/** MD3 8dp spacing scale shared by the onboarding screens. */
-internal object OnboardingSpace {
-    val xs = 8.dp
-    val sm = 16.dp
-    val md = 24.dp
-    val lg = 32.dp
-    val xl = 48.dp
-}
-
-/**
- * Shared onboarding shell (calendar grant, reminder step): a scrollable,
- * centred hero + body with the call(s) to action pinned to the bottom (clear
- * of the navigation bar). The content slot is centred horizontally; benefit
- * rows fill the width so their own content left-aligns.
- */
-@Composable
-internal fun OnboardingScaffold(
-    hero: @Composable () -> Unit,
-    actions: @Composable ColumnScope.() -> Unit,
-    modifier: Modifier = Modifier,
-    body: @Composable ColumnScope.() -> Unit,
-) {
-    Scaffold(
-        modifier = modifier,
-        containerColor = MaterialTheme.colorScheme.surface,
-        bottomBar = {
-            Column(
-                modifier = Modifier
-                    .fillMaxWidth()
-                    .navigationBarsPadding()
-                    .padding(horizontal = OnboardingSpace.md, vertical = OnboardingSpace.sm),
-                horizontalAlignment = Alignment.CenterHorizontally,
-                verticalArrangement = Arrangement.spacedBy(4.dp),
-                content = actions,
-            )
-        },
-    ) { innerPadding ->
-        Column(
-            modifier = Modifier
-                .fillMaxSize()
-                .padding(innerPadding)
-                .verticalScroll(rememberScrollState())
-                .padding(horizontal = OnboardingSpace.md),
-            horizontalAlignment = Alignment.CenterHorizontally,
-        ) {
-            Spacer(Modifier.height(OnboardingSpace.xl))
-            hero()
-            Spacer(Modifier.height(OnboardingSpace.lg))
-            body()
-            Spacer(Modifier.height(OnboardingSpace.md))
-        }
-    }
-}
-
-/** The app's adaptive launcher mark, reconstructed as a large branded squircle. */
-@Composable
-internal fun BrandHero(denied: Boolean) {
-    Box(contentAlignment = Alignment.Center) {
-        Box(
-            modifier = Modifier
-                .size(128.dp)
-                .clip(RoundedCornerShape(34.dp))
-                .background(colorResource(R.color.ic_launcher_background)),
-        ) {
-            Image(
-                painter = painterResource(R.drawable.ic_launcher_foreground),
-                contentDescription = stringResource(R.string.app_name),
-                modifier = Modifier.fillMaxSize(),
-            )
-        }
-        if (denied) {
-            // A small lock badge sits over the corner to signal "blocked".
-            Box(
-                modifier = Modifier
-                    .align(Alignment.BottomEnd)
-                    .offset(x = 10.dp, y = 10.dp)
-                    .size(44.dp)
-                    .clip(CircleShape)
-                    .background(MaterialTheme.colorScheme.errorContainer),
-                contentAlignment = Alignment.Center,
-            ) {
-                Icon(
-                    imageVector = Icons.Filled.Lock,
-                    contentDescription = null,
-                    tint = MaterialTheme.colorScheme.onErrorContainer,
-                    modifier = Modifier.size(24.dp),
-                )
-            }
-        }
-    }
-}
-
-/** One trust point: a tonal icon chip on the left, title + supporting text right. */
-@Composable
-internal fun BenefitRow(icon: ImageVector, title: String, body: String) {
-    Row(
-        modifier = Modifier.fillMaxWidth(),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
-        Box(
-            modifier = Modifier
-                .size(44.dp)
-                .clip(CircleShape)
-                .background(MaterialTheme.colorScheme.secondaryContainer),
-            contentAlignment = Alignment.Center,
-        ) {
-            Icon(
-                imageVector = icon,
-                contentDescription = null,
-                tint = MaterialTheme.colorScheme.onSecondaryContainer,
-                modifier = Modifier.size(22.dp),
-            )
-        }
-        Spacer(Modifier.width(OnboardingSpace.sm))
-        Column(modifier = Modifier.weight(1f)) {
-            Text(text = title, style = MaterialTheme.typography.titleMedium)
-            Text(
-                text = body,
-                style = MaterialTheme.typography.bodyMedium,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
-            )
-        }
-    }
-}

app/src/main/java/de/jeanlucmakiola/calendula/ui/permission/PermissionScreen.kt

@@ -1,5 +1,9 @@
 package de.jeanlucmakiola.calendula.ui.permission
 
+import de.jeanlucmakiola.floret.components.BenefitRow
+import de.jeanlucmakiola.floret.components.OnboardingScaffold
+import de.jeanlucmakiola.floret.components.OnboardingSpace
+
 import android.Manifest
 import android.content.Intent
 import android.net.Uri

app/src/main/java/de/jeanlucmakiola/calendula/ui/permission/ReminderOnboardingScreen.kt

@@ -1,5 +1,9 @@
 package de.jeanlucmakiola.calendula.ui.permission
 
+import de.jeanlucmakiola.floret.components.BenefitRow
+import de.jeanlucmakiola.floret.components.OnboardingScaffold
+import de.jeanlucmakiola.floret.components.OnboardingSpace
+
 import android.Manifest
 import android.os.Build
 import androidx.activity.compose.rememberLauncherForActivityResult

app/src/main/java/de/jeanlucmakiola/calendula/ui/search/SearchScreen.kt

@@ -42,20 +42,23 @@ import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.platform.LocalSoftwareKeyboardController
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.text.style.TextAlign
 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.EventInstance
-import de.jeanlucmakiola.calendula.ui.common.calendarAnimateItem
+import de.jeanlucmakiola.floret.identity.animateItemMotion
-import de.jeanlucmakiola.calendula.ui.common.predictiveBack
+import de.jeanlucmakiola.floret.identity.predictiveBack
-import de.jeanlucmakiola.calendula.ui.common.GroupedRow
+import de.jeanlucmakiola.floret.components.GroupedRow
-import de.jeanlucmakiola.calendula.ui.common.InlineTextField
+import de.jeanlucmakiola.floret.components.InlineTextField
-import de.jeanlucmakiola.calendula.ui.common.Position
+import de.jeanlucmakiola.floret.components.Position
 import de.jeanlucmakiola.calendula.ui.common.currentLocale
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
-import de.jeanlucmakiola.calendula.ui.common.positionOf
+import de.jeanlucmakiola.calendula.ui.common.timeOfDayFormatter
+import de.jeanlucmakiola.floret.components.pastelize
+import de.jeanlucmakiola.floret.components.positionOf
 import java.time.Instant as JavaInstant
 import java.time.ZoneId
 import java.time.format.DateTimeFormatter
@@ -99,6 +102,7 @@ fun SearchScreen(
                         value = query,
                         onValueChange = viewModel::setQuery,
                         placeholder = stringResource(R.string.search_hint),
+                        capitalization = KeyboardCapitalization.None,
                         imeAction = ImeAction.Search,
                         onImeAction = { keyboard?.hide() },
                         modifier = Modifier
@@ -173,7 +177,7 @@ private fun SearchResults(
             SearchResultRow(
                 event = event,
                 position = positionOf(index, events.size),
-                modifier = calendarAnimateItem(),
+                modifier = animateItemMotion(),
                 onClick = { onEventClick(event) },
             )
         }
@@ -217,12 +221,11 @@ private fun searchSummary(event: EventInstance): String {
     val dateText = remember(locale) {
         DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).withLocale(locale)
     }.format(start)
+    val use24Hour = LocalUse24HourFormat.current
     val timeText = if (event.isAllDay) {
         stringResource(R.string.event_detail_all_day)
     } else {
-        remember(locale) {
+        remember(locale, use24Hour) { timeOfDayFormatter(use24Hour, locale) }.format(start)
-            DateTimeFormatter.ofLocalizedTime(FormatStyle.SHORT).withLocale(locale)
-        }.format(start)
     }
     val base = "$dateText · $timeText"
     return event.location?.takeIf { it.isNotBlank() }?.let { "$base · $it" } ?: base

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

@@ -1,78 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.settings
-
-import android.content.Context
-import androidx.appcompat.app.AppCompatDelegate
-import androidx.core.os.LocaleListCompat
-import de.jeanlucmakiola.calendula.R
-import org.xmlpull.v1.XmlPullParser
-import java.util.Locale
-
-private const val ANDROID_NS = "http://schemas.android.com/apk/res/android"
-
-/**
- * Per-app language via AppCompatDelegate, driven by res/xml/locales_config.xml.
- *
- * That file is the single source of truth for which languages we ship: dropping
- * in a values-<tag> translation and adding a matching `<locale>` entry makes the
- * language show up here and in the system per-app-language settings, with no
- * other code change. The system-default choice is represented as `null`.
- *
- * On API 33+ this delegates to the platform per-app-languages API; below that
- * the appcompat backport persists the choice itself (manifest `autoStoreLocales`
- * service), so we don't mirror it in DataStore. Setting a locale recreates the
- * activity, which re-reads the current value for the picker.
- */
-object AppLanguage {
-
-    /**
-     * The BCP-47 tags the app ships translations for, in declaration order, as
-     * listed in locales_config.xml. Returns whatever could be parsed; a missing
-     * or malformed config yields an empty list (the picker then offers only the
-     * system-default entry rather than crashing).
-     */
-    fun supportedTags(context: Context): List<String> {
-        val tags = mutableListOf<String>()
-        val parser = context.resources.getXml(R.xml.locales_config)
-        try {
-            var event = parser.eventType
-            while (event != XmlPullParser.END_DOCUMENT) {
-                if (event == XmlPullParser.START_TAG && parser.name == "locale") {
-                    parser.getAttributeValue(ANDROID_NS, "name")?.let(tags::add)
-                }
-                event = parser.next()
-            }
-        } catch (_: Exception) {
-            // Fall back to whatever was parsed before the failure.
-        } finally {
-            parser.close()
-        }
-        return tags
-    }
-
-    /** The applied app language as a BCP-47 tag, or `null` when following the system. */
-    fun currentTag(): String? {
-        val locales = AppCompatDelegate.getApplicationLocales()
-        return if (locales.isEmpty) null else locales[0]?.toLanguageTag()
-    }
-
-    /** Apply a BCP-47 tag, or `null` to follow the system languages. */
-    fun apply(tag: String?) {
-        val locales = if (tag == null) {
-            LocaleListCompat.getEmptyLocaleList()
-        } else {
-            LocaleListCompat.forLanguageTags(tag)
-        }
-        AppCompatDelegate.setApplicationLocales(locales)
-    }
-
-    /**
-     * The autonym for a tag — the language's own name in its own script, e.g.
-     * "Deutsch", "English", "Français" — so users find their language regardless
-     * of the current UI language. Capitalised per the language's own rules.
-     */
-    fun displayName(tag: String): String {
-        val locale = Locale.forLanguageTag(tag)
-        return locale.getDisplayName(locale)
-            .replaceFirstChar { if (it.isLowerCase()) it.titlecase(locale) else it.toString() }
-    }
-}

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

@@ -24,7 +24,6 @@ import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -39,6 +38,7 @@ import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.BugReport
 import androidx.compose.material.icons.filled.CalendarMonth
+import androidx.compose.material.icons.filled.Dashboard
 import androidx.compose.material.icons.filled.Check
 import androidx.compose.material.icons.filled.ExpandLess
 import androidx.compose.material.icons.filled.ExpandMore
@@ -47,11 +47,11 @@ 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.Translate
 import androidx.compose.material.icons.filled.Tune
-import androidx.compose.material3.FilledTonalButton
+import de.jeanlucmakiola.floret.locale.AppLanguage
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
@@ -69,6 +69,7 @@ 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.vectorResource
 import androidx.compose.ui.res.pluralStringResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
@@ -81,31 +82,41 @@ import androidx.lifecycle.LifecycleEventObserver
 import androidx.lifecycle.compose.LocalLifecycleOwner
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import de.jeanlucmakiola.calendula.R
-import de.jeanlucmakiola.calendula.data.crash.CrashReporter
+import de.jeanlucmakiola.floret.reminders.ReminderOverride
-import de.jeanlucmakiola.calendula.data.prefs.CalendarReminderOverride
 import de.jeanlucmakiola.calendula.data.prefs.ThemeMode
+import de.jeanlucmakiola.calendula.data.prefs.TimeFormatPref
 import de.jeanlucmakiola.calendula.data.prefs.WeekStartPref
 import de.jeanlucmakiola.calendula.domain.EventFormField
 import de.jeanlucmakiola.calendula.qs.NewEventTileService
-import de.jeanlucmakiola.calendula.ui.crash.CrashReportDialog
+import de.jeanlucmakiola.floret.identity.collapseExit
-import de.jeanlucmakiola.calendula.ui.crash.openIssueTracker
+import de.jeanlucmakiola.floret.crash.CrashReportDialog
-import de.jeanlucmakiola.calendula.ui.crash.submitCrashReport
+import de.jeanlucmakiola.floret.crash.CrashReporter
-import de.jeanlucmakiola.calendula.ui.common.calendarCollapseExit
+import de.jeanlucmakiola.floret.crash.openIssueTracker
-import de.jeanlucmakiola.calendula.ui.common.calendarExpandEnter
+import de.jeanlucmakiola.floret.crash.submitCrashReport
-import de.jeanlucmakiola.calendula.ui.common.CollapsingScaffold
+import de.jeanlucmakiola.floret.identity.expandEnter
-import de.jeanlucmakiola.calendula.ui.common.GroupedRow
+import de.jeanlucmakiola.calendula.ui.common.AgendaRangePicker
+import de.jeanlucmakiola.calendula.ui.common.agendaRangeLabel
+import de.jeanlucmakiola.floret.components.AboutCard
+import de.jeanlucmakiola.floret.components.AboutLink
+import de.jeanlucmakiola.floret.components.CollapsingScaffold
+import de.jeanlucmakiola.floret.components.GroupedRow
 import de.jeanlucmakiola.calendula.ui.common.IMPLEMENTED_VIEWS
 import de.jeanlucmakiola.calendula.ui.common.labelRes
 import de.jeanlucmakiola.calendula.ui.common.CalendarColorChip
-import de.jeanlucmakiola.calendula.ui.common.OptionPicker
+import de.jeanlucmakiola.floret.components.OptionPicker
-import de.jeanlucmakiola.calendula.ui.common.Position
+import de.jeanlucmakiola.floret.components.Position
 import de.jeanlucmakiola.calendula.ui.common.REMINDER_PRESETS
 import de.jeanlucmakiola.calendula.ui.common.ReminderDefaultPicker
 import de.jeanlucmakiola.calendula.ui.common.TimePickerAlert
-import de.jeanlucmakiola.calendula.ui.common.positionOf
+import de.jeanlucmakiola.floret.components.positionOf
 import de.jeanlucmakiola.calendula.ui.common.reminderLeadTimeLabel
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarSlideSpec
+import de.jeanlucmakiola.calendula.ui.common.currentLocale
+import de.jeanlucmakiola.calendula.ui.common.eventFormFieldIcon
+import de.jeanlucmakiola.calendula.ui.common.eventFormFieldLabel
+import kotlinx.datetime.DayOfWeek
 import kotlinx.datetime.LocalTime
+import java.time.format.TextStyle as JavaTextStyle
 import java.util.Calendar
 
 /** The settings sub-screens reached from the hub's category rows. */
@@ -181,7 +192,7 @@ private fun SettingsHub(
     onOpenSection: (SettingsSection) -> Unit,
     onManageCalendars: () -> Unit,
 ) {
-    CollapsingScaffold(title = stringResource(R.string.settings_title), onBack = onBack) {
+    CollapsingScaffold(title = stringResource(R.string.settings_title), onBack = onBack, predictiveBack = true) {
         Box(Modifier.padding(horizontal = 16.dp)) { AboutCard() }
         Spacer(Modifier.height(16.dp))
 
@@ -214,6 +225,12 @@ private fun SettingsHub(
             onClick = onManageCalendars,
         )
         LanguageRow(position = Position.Middle)
+        // One-tap add of the "New event" Quick Settings tile. The system prompt
+        // is API 33+; on older versions the tile is still addable manually from
+        // the QS editor, so the row simply doesn't appear here.
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            QuickSettingsTileRow(position = Position.Middle)
+        }
         ReportProblemRow(position = Position.Bottom)
 
         AppVersionText()
@@ -255,6 +272,24 @@ private fun ReportProblemRow(position: Position) {
     }
 }
 
+/**
+ * Asks the system to add the "New event" Quick Settings tile (API 33+). A
+ * top-level action row, like [ReportProblemRow] — the tile is a system-surface
+ * shortcut, not part of any one settings category.
+ */
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+@Composable
+private fun QuickSettingsTileRow(position: Position) {
+    val context = LocalContext.current
+    GroupedRow(
+        title = stringResource(R.string.settings_qs_tile),
+        summary = stringResource(R.string.settings_qs_tile_hint),
+        position = position,
+        leading = { CategoryIcon(Icons.Default.Dashboard, ChipAccent.Neutral) },
+        onClick = { requestAddQsTile(context) },
+    )
+}
+
 @Composable
 private fun LanguageRow(position: Position) {
     val context = LocalContext.current
@@ -264,7 +299,7 @@ private fun LanguageRow(position: Position) {
     var showDialog by remember { mutableStateOf(false) }
 
     // null = follow the system; the rest are BCP-47 tags from locales_config.xml.
-    val options = remember { listOf<String?>(null) + AppLanguage.supportedTags(context) }
+    val options = remember { listOf<String?>(null) + AppLanguage.supportedTags(context, R.xml.locales_config) }
 
     GroupedRow(
         title = stringResource(R.string.settings_language),
@@ -277,6 +312,7 @@ private fun LanguageRow(position: Position) {
     if (showDialog) {
         OptionPicker(
             title = stringResource(R.string.settings_language),
+            predictiveBack = true,
             options = options,
             selected = current,
             label = { languageLabel(it) },
@@ -285,89 +321,48 @@ private fun LanguageRow(position: Position) {
                 AppLanguage.apply(it)
             },
             onDismiss = { showDialog = false },
+            // Invite contributions right where users pick their language.
+            header = {
+                val translateUrl = stringResource(R.string.about_translate_url)
+                GroupedRow(
+                    title = stringResource(R.string.settings_translate),
+                    summary = stringResource(R.string.settings_translate_hint),
+                    position = Position.Alone,
+                    leading = { CategoryIcon(Icons.Default.Translate, ChipAccent.Neutral) },
+                    onClick = { openUrl(context, translateUrl) },
+                )
+                Spacer(Modifier.height(16.dp))
+            },
         )
     }
 }
 
 @Composable
 private fun AboutCard() {
-    val context = LocalContext.current
+    // The card layout lives in floret-kit (components.AboutCard); Calendula
-    val sourceUrl = stringResource(R.string.about_source_url)
+    // supplies its own logo, author and the source / licence / support links.
-    val licenseUrl = stringResource(R.string.about_license_url)
+    AboutCard(
-    val supportUrl = stringResource(R.string.about_support_url)
+        logo = { AppLogo() },
-
+        appName = stringResource(R.string.app_name),
-    Surface(
+        author = stringResource(R.string.settings_about_author),
-        color = MaterialTheme.colorScheme.surfaceContainerHigh,
+        primaryLinks = listOf(
-        shape = RoundedCornerShape(24.dp),
+            AboutLink(
-        modifier = Modifier.fillMaxWidth(),
+                icon = ImageVector.vectorResource(R.drawable.ic_gitea),
-    ) {
+                label = stringResource(R.string.settings_about_source),
-        Column(
+                url = stringResource(R.string.about_source_url),
-            modifier = Modifier
+            ),
-                .fillMaxWidth()
+            AboutLink(
-                .padding(16.dp),
+                icon = Icons.Default.Gavel,
-        ) {
+                label = stringResource(R.string.settings_license),
-            Row(verticalAlignment = Alignment.CenterVertically) {
+                url = stringResource(R.string.about_license_url),
-                AppLogo()
+            ),
-                Spacer(Modifier.width(16.dp))
+        ),
-                Column(Modifier.weight(1f)) {
+        highlightLink = AboutLink(
-                    Text(
+            icon = Icons.Default.Favorite,
-                        text = stringResource(R.string.app_name),
+            label = stringResource(R.string.settings_about_support),
-                        style = MaterialTheme.typography.titleLarge,
+            url = stringResource(R.string.about_support_url),
+        ),
     )
-                    Text(
-                        text = stringResource(R.string.settings_about_author),
-                        style = MaterialTheme.typography.bodyMedium,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                    )
-                }
-            }
-            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))
-                }
-            }
-            Spacer(Modifier.height(8.dp))
-            FilledTonalButton(
-                onClick = { openUrl(context, supportUrl) },
-                modifier = Modifier.fillMaxWidth(),
-            ) {
-                Icon(
-                    Icons.Default.Favorite,
-                    contentDescription = null,
-                    modifier = Modifier.size(18.dp),
-                )
-                Spacer(Modifier.width(8.dp))
-                Text(stringResource(R.string.settings_about_support))
-            }
-        }
-    }
 }
 
 /** Plain centred version mark at the foot of the settings list (no card). */
@@ -424,24 +419,23 @@ private fun AppearanceScreen(
 ) {
     var showTheme by remember { mutableStateOf(false) }
     var showWeekStart by remember { mutableStateOf(false) }
+    var showTimeFormat by remember { mutableStateOf(false) }
     var showDefaultView by remember { mutableStateOf(false) }
+    var showAgendaScreenRange by remember { mutableStateOf(false) }
+    var showAgendaWidgetRange by remember { mutableStateOf(false) }
 
     CollapsingScaffold(
         title = stringResource(R.string.settings_section_appearance),
         onBack = onBack,
+        predictiveBack = true,
     ) {
+        // Theme & colour
         GroupedRow(
             title = stringResource(R.string.settings_theme),
             summary = themeLabel(state.themeMode),
             position = Position.Top,
             onClick = { showTheme = true },
         )
-        GroupedRow(
-            title = stringResource(R.string.settings_default_view),
-            summary = stringResource(state.defaultView.labelRes),
-            position = Position.Middle,
-            onClick = { showDefaultView = true },
-        )
         GroupedRow(
             title = stringResource(R.string.settings_dynamic_color),
             summary = if (state.dynamicColorAvailable) {
@@ -449,7 +443,7 @@ private fun AppearanceScreen(
             } else {
                 stringResource(R.string.settings_dynamic_color_unavailable)
             },
-            position = Position.Middle,
+            position = Position.Bottom,
             trailing = {
                 Switch(
                     checked = state.dynamicColor,
@@ -463,17 +457,74 @@ private fun AppearanceScreen(
                 null
             },
         )
+
+        Spacer(Modifier.height(16.dp))
+
+        // Calendar — view, week, and timeline formatting
+        GroupedRow(
+            title = stringResource(R.string.settings_default_view),
+            summary = stringResource(state.defaultView.labelRes),
+            position = Position.Top,
+            onClick = { showDefaultView = true },
+        )
         GroupedRow(
             title = stringResource(R.string.settings_week_start),
             summary = weekStartLabel(state.weekStart),
-            position = Position.Bottom,
+            position = Position.Middle,
             onClick = { showWeekStart = true },
         )
+        GroupedRow(
+            title = stringResource(R.string.settings_time_format),
+            summary = timeFormatLabel(state.timeFormat),
+            position = Position.Middle,
+            onClick = { showTimeFormat = true },
+        )
+        GroupedRow(
+            title = stringResource(R.string.settings_hour_lines),
+            summary = stringResource(R.string.settings_hour_lines_summary),
+            position = Position.Bottom,
+            trailing = {
+                Switch(
+                    checked = state.showHourLines,
+                    onCheckedChange = viewModel::setShowHourLines,
+                )
+            },
+            onClick = { viewModel.setShowHourLines(!state.showHourLines) },
+        )
+
+        Spacer(Modifier.height(16.dp))
+
+        // Agenda
+        GroupedRow(
+            title = stringResource(R.string.settings_agenda_range),
+            summary = agendaRangeLabel(state.agendaScreenRange),
+            position = Position.Top,
+            onClick = { showAgendaScreenRange = true },
+        )
+        GroupedRow(
+            title = stringResource(R.string.settings_agenda_widget_range),
+            summary = agendaRangeLabel(state.agendaWidgetRange),
+            position = Position.Middle,
+            onClick = { showAgendaWidgetRange = true },
+        )
+        GroupedRow(
+            title = stringResource(R.string.settings_agenda_range_bar),
+            summary = stringResource(R.string.settings_agenda_range_bar_hint),
+            position = Position.Bottom,
+            trailing = {
+                Switch(
+                    checked = state.agendaShowRangeBar,
+                    onCheckedChange = viewModel::setAgendaShowRangeBar,
+                )
+            },
+            onClick = { viewModel.setAgendaShowRangeBar(!state.agendaShowRangeBar) },
+        )
     }
 
     if (showTheme) {
         OptionPicker(
             title = stringResource(R.string.settings_theme),
+            predictiveBack = true,
             options = ThemeMode.entries,
             selected = state.themeMode,
             label = { themeLabel(it) },
@@ -484,16 +535,47 @@ private fun AppearanceScreen(
     if (showWeekStart) {
         OptionPicker(
             title = stringResource(R.string.settings_week_start),
-            options = WeekStartPref.entries,
+            predictiveBack = true,
+            options = WEEK_START_OPTIONS,
             selected = state.weekStart,
             label = { weekStartLabel(it) },
             onSelect = viewModel::setWeekStart,
             onDismiss = { showWeekStart = false },
         )
     }
+    if (showAgendaScreenRange) {
+        AgendaRangePicker(
+            title = stringResource(R.string.settings_agenda_range),
+            description = stringResource(R.string.settings_agenda_range_hint),
+            selected = state.agendaScreenRange,
+            onSelect = viewModel::setAgendaScreenRange,
+            onDismiss = { showAgendaScreenRange = false },
+        )
+    }
+    if (showAgendaWidgetRange) {
+        AgendaRangePicker(
+            title = stringResource(R.string.settings_agenda_widget_range),
+            description = stringResource(R.string.settings_agenda_widget_range_hint),
+            selected = state.agendaWidgetRange,
+            onSelect = viewModel::setAgendaWidgetRange,
+            onDismiss = { showAgendaWidgetRange = false },
+        )
+    }
+    if (showTimeFormat) {
+        OptionPicker(
+            title = stringResource(R.string.settings_time_format),
+            predictiveBack = true,
+            options = TimeFormatPref.entries,
+            selected = state.timeFormat,
+            label = { timeFormatLabel(it) },
+            onSelect = viewModel::setTimeFormat,
+            onDismiss = { showTimeFormat = false },
+        )
+    }
     if (showDefaultView) {
         OptionPicker(
             title = stringResource(R.string.settings_default_view),
+            predictiveBack = true,
             options = IMPLEMENTED_VIEWS,
             selected = state.defaultView,
             label = { stringResource(it.labelRes) },
@@ -512,6 +594,7 @@ private fun EventFormScreen(
     CollapsingScaffold(
         title = stringResource(R.string.settings_section_event_form),
         onBack = onBack,
+        predictiveBack = true,
     ) {
         Text(
             text = stringResource(R.string.settings_form_fields_hint),
@@ -524,8 +607,17 @@ private fun EventFormScreen(
         fields.forEachIndexed { index, field ->
             val checked = field in state.defaultFormFields
             GroupedRow(
-                title = stringResource(formFieldLabel(field)),
+                title = stringResource(eventFormFieldLabel(field)),
                 position = positionOf(index, fields.size),
+                // Same icon the field carries in the new-event form, so a toggle
+                // is easy to match to the field it controls.
+                leading = {
+                    Icon(
+                        imageVector = eventFormFieldIcon(field),
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                },
                 trailing = {
                     Switch(
                         checked = checked,
@@ -556,20 +648,6 @@ private fun EventFormScreen(
                 )
             },
         )
-
-        // One-tap add of the "New event" Quick Settings tile. The system prompt
-        // is API 33+; on older versions the tile is still addable manually from
-        // the QS editor, so the row simply doesn't appear there.
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
-            Spacer(Modifier.height(24.dp))
-            val context = LocalContext.current
-            GroupedRow(
-                title = stringResource(R.string.settings_qs_tile),
-                summary = stringResource(R.string.settings_qs_tile_hint),
-                position = Position.Alone,
-                onClick = { requestAddQsTile(context) },
-            )
-        }
     }
 }
 
@@ -621,11 +699,13 @@ private fun NotificationsScreen(
     var showAllDayReminderTime by remember { mutableStateOf(false) }
     var showSnooze by remember { mutableStateOf(false) }
     var overrideDialog by remember { mutableStateOf<OverrideTarget?>(null) }
+    var calendarSectionExpanded by remember { mutableStateOf(false) }
     var expandedCalendars by remember { mutableStateOf(emptySet<Long>()) }
 
     CollapsingScaffold(
         title = stringResource(R.string.settings_section_notifications),
         onBack = onBack,
+        predictiveBack = true,
     ) {
         GroupedRow(
             title = stringResource(R.string.settings_reminders),
@@ -658,21 +738,73 @@ private fun NotificationsScreen(
             onClick = { showAllDayReminderTime = true },
         )
 
-        // Per-calendar overrides: each writable calendar may keep, drop, or
+        // Delivery reliability + snooze: both are global reminder-delivery
-        // replace the global default — separately for timed and all-day events.
+        // settings, so they sit with the defaults above rather than below the
+        // long per-calendar list. Reliability is a soft, optional battery-
+        // optimisation exemption (system-settings deep-link, no special
+        // permission); shown as live status, reversible at any time.
+        Spacer(Modifier.height(24.dp))
+        val batteryExempt = rememberBatteryOptimizationExempt()
+        GroupedRow(
+            title = stringResource(R.string.settings_reliable_delivery),
+            summary = if (batteryExempt) {
+                stringResource(R.string.settings_reliable_delivery_exempt)
+            } else {
+                stringResource(R.string.settings_reliable_delivery_hint)
+            },
+            position = Position.Top,
+            trailing = if (batteryExempt) {
+                {
+                    Icon(
+                        imageVector = Icons.Default.Check,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary,
+                    )
+                }
+            } else {
+                null
+            },
+            onClick = { openBatteryOptimizationSettings(context) },
+        )
+
+        // Snooze: how long the notification's "Snooze" action defers a reminder.
+        GroupedRow(
+            title = stringResource(R.string.settings_snooze_duration),
+            summary = snoozeDurationLabel(state.snoozeMinutes),
+            position = Position.Bottom,
+            onClick = { showSnooze = true },
+        )
+
+        // Per-calendar overrides: the whole section folds behind one header to
+        // keep the screen tidy. Expanded, each writable calendar gets its own
+        // expandable card that may keep, drop, or replace the global default —
+        // separately for timed and all-day events.
         if (state.writableCalendars.isNotEmpty()) {
             Spacer(Modifier.height(24.dp))
-            Text(
+            GroupedRow(
-                text = stringResource(R.string.settings_calendar_reminders_hint),
+                title = stringResource(R.string.settings_calendar_reminders_title),
-                style = MaterialTheme.typography.bodyMedium,
+                summary = stringResource(R.string.settings_calendar_reminders_hint),
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                position = Position.Alone,
-                modifier = Modifier.padding(horizontal = 16.dp, vertical = 4.dp),
+                trailing = {
+                    Icon(
+                        imageVector = if (calendarSectionExpanded) Icons.Default.ExpandLess else Icons.Default.ExpandMore,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.onSurfaceVariant,
                     )
+                },
+                onClick = { calendarSectionExpanded = !calendarSectionExpanded },
+            )
+            AnimatedVisibility(
+                visible = calendarSectionExpanded,
+                enter = expandEnter(),
+                exit = collapseExit(),
+            ) {
+                Column {
                     state.writableCalendars.forEach { calendar ->
                         Spacer(Modifier.height(16.dp))
                         val expanded = calendar.id in expandedCalendars
-                // Calendar card; tapping expands it into a grouped list of three
+                        // Calendar card; tapping expands it into a grouped list
-                // (the card + the timed and all-day override rows).
+                        // of three (the card + the timed and all-day rows).
                         GroupedRow(
                             title = calendar.displayName,
                             position = if (expanded) Position.Top else Position.Alone,
@@ -694,8 +826,8 @@ private fun NotificationsScreen(
                         )
                         AnimatedVisibility(
                             visible = expanded,
-                    enter = calendarExpandEnter(),
+                            enter = expandEnter(),
-                    exit = calendarCollapseExit(),
+                            exit = collapseExit(),
                         ) {
                             Column {
                                 val timed = state.perCalendarReminderOverride.choiceFor(calendar.id)
@@ -716,48 +848,14 @@ private fun NotificationsScreen(
                         }
                     }
                 }
-
-        // Delivery reliability: Android's battery optimisation can delay or drop
-        // the calendar provider's reminder broadcast. A soft, optional exemption
-        // (system-settings deep-link, no special permission) improves on-time
-        // delivery; shown as live status, reversible by the user at any time.
-        Spacer(Modifier.height(24.dp))
-        val batteryExempt = rememberBatteryOptimizationExempt()
-        GroupedRow(
-            title = stringResource(R.string.settings_reliable_delivery),
-            summary = if (batteryExempt) {
-                stringResource(R.string.settings_reliable_delivery_exempt)
-            } else {
-                stringResource(R.string.settings_reliable_delivery_hint)
-            },
-            position = Position.Alone,
-            trailing = if (batteryExempt) {
-                {
-                    Icon(
-                        imageVector = Icons.Default.Check,
-                        contentDescription = null,
-                        tint = MaterialTheme.colorScheme.primary,
-                    )
             }
-            } else {
+        }
-                null
-            },
-            onClick = { openBatteryOptimizationSettings(context) },
-        )
-
-        // Snooze: how long the notification's "Snooze" action defers a reminder.
-        Spacer(Modifier.height(24.dp))
-        GroupedRow(
-            title = stringResource(R.string.settings_snooze_duration),
-            summary = snoozeDurationLabel(state.snoozeMinutes),
-            position = Position.Alone,
-            onClick = { showSnooze = true },
-        )
     }
 
     if (showSnooze) {
         OptionPicker(
             title = stringResource(R.string.settings_snooze_duration),
+            predictiveBack = true,
             options = SNOOZE_PRESETS,
             selected = state.snoozeMinutes,
             label = { snoozeDurationLabel(it) },
@@ -831,12 +929,12 @@ private fun NotificationsScreen(
 private data class OverrideTarget(val calendarId: Long, val isAllDay: Boolean)
 
 /** A global default (null = none) as a picker choice for selection highlighting. */
-private fun Int?.toReminderChoice(): CalendarReminderOverride =
+private fun Int?.toReminderChoice(): ReminderOverride =
-    if (this == null) CalendarReminderOverride.None else CalendarReminderOverride.Minutes(this)
+    if (this == null) ReminderOverride.None else ReminderOverride.Minutes(this)
 
 /** A picked choice as global-default minutes (Inherit isn't offered for globals). */
-private fun CalendarReminderOverride.toMinutesOrNull(): Int? =
+private fun ReminderOverride.toMinutesOrNull(): Int? =
-    (this as? CalendarReminderOverride.Minutes)?.minutes
+    (this as? ReminderOverride.Minutes)?.minutes
 
 /**
  * Whether Calendula is exempt from battery optimisation, re-read on every
@@ -911,10 +1009,10 @@ private fun formatTimeOfDay(context: Context, minutesOfDay: Int): String {
 }
 
 /** The stored override for [calendarId], as a picker choice (absent → inherit). */
-private fun Map<Long, Int?>.choiceFor(calendarId: Long): CalendarReminderOverride = when {
+private fun Map<Long, Int?>.choiceFor(calendarId: Long): ReminderOverride = when {
-    !containsKey(calendarId) -> CalendarReminderOverride.Inherit
+    !containsKey(calendarId) -> ReminderOverride.Inherit
-    this[calendarId] == null -> CalendarReminderOverride.None
+    this[calendarId] == null -> ReminderOverride.None
-    else -> CalendarReminderOverride.Minutes(this.getValue(calendarId)!!)
+    else -> ReminderOverride.Minutes(this.getValue(calendarId)!!)
 }
 
 /** Label for a global-default choice: null → "None", else the lead time. */
@@ -925,13 +1023,13 @@ private fun reminderChoiceLabel(minutes: Int?): String =
 /** Row summary for a calendar: its override, or the inherited global default. */
 @Composable
 private fun calendarOverrideSummary(
-    choice: CalendarReminderOverride,
+    choice: ReminderOverride,
     globalDefault: Int?,
 ): String = when (choice) {
-    CalendarReminderOverride.Inherit ->
+    ReminderOverride.Inherit ->
         stringResource(R.string.settings_calendar_reminder_inherits, reminderChoiceLabel(globalDefault))
-    CalendarReminderOverride.None -> stringResource(R.string.reminder_none)
+    ReminderOverride.None -> stringResource(R.string.reminder_none)
-    is CalendarReminderOverride.Minutes -> reminderLeadTimeLabel(choice.minutes)
+    is ReminderOverride.Minutes -> reminderLeadTimeLabel(choice.minutes)
 }
 
 // ---------------------------------------------------------------------------
@@ -973,17 +1071,6 @@ private fun openUrl(context: Context, url: String) {
     runCatching { context.startActivity(intent) }
 }
 
-private fun formFieldLabel(field: EventFormField): Int = when (field) {
-    EventFormField.Location -> R.string.event_detail_location
-    EventFormField.Description -> R.string.event_detail_description
-    EventFormField.Reminders -> R.string.event_detail_reminders
-    EventFormField.Recurrence -> R.string.event_detail_recurrence
-    EventFormField.Availability -> R.string.event_edit_availability
-    EventFormField.Visibility -> R.string.event_edit_visibility
-    EventFormField.Color -> R.string.event_edit_color
-    EventFormField.Attendees -> R.string.event_edit_attendees
-}
-
 @Composable
 private fun themeLabel(mode: ThemeMode): String = stringResource(
     when (mode) {
@@ -993,12 +1080,25 @@ private fun themeLabel(mode: ThemeMode): String = stringResource(
     },
 )
 
+/** Picker options: "Follow system" first, then Monday…Sunday in ISO order. */
+private val WEEK_START_OPTIONS: List<WeekStartPref> =
+    listOf(WeekStartPref.Auto) + DayOfWeek.entries.map { WeekStartPref.Day(it) }
+
 @Composable
-private fun weekStartLabel(pref: WeekStartPref): String = stringResource(
+private fun weekStartLabel(pref: WeekStartPref): String = when (pref) {
+    WeekStartPref.Auto -> stringResource(R.string.settings_week_start_auto)
+    // Localised full weekday name, so any of the seven days reads naturally
+    // without a per-day string resource.
+    is WeekStartPref.Day -> java.time.DayOfWeek.of(pref.day.ordinal + 1)
+        .getDisplayName(JavaTextStyle.FULL, currentLocale())
+}
+
+@Composable
+private fun timeFormatLabel(pref: TimeFormatPref): String = stringResource(
     when (pref) {
-        WeekStartPref.AUTO -> R.string.settings_week_start_auto
+        TimeFormatPref.AUTO -> R.string.settings_time_format_auto
-        WeekStartPref.MONDAY -> R.string.settings_week_start_monday
+        TimeFormatPref.TWELVE_HOUR -> R.string.settings_time_format_12h
-        WeekStartPref.SUNDAY -> R.string.settings_week_start_sunday
+        TimeFormatPref.TWENTY_FOUR_HOUR -> R.string.settings_time_format_24h
     },
 )
 

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

@@ -2,9 +2,11 @@ package de.jeanlucmakiola.calendula.ui.settings
 
 import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
 import de.jeanlucmakiola.calendula.data.prefs.ThemeMode
+import de.jeanlucmakiola.calendula.data.prefs.TimeFormatPref
 import de.jeanlucmakiola.calendula.data.prefs.WeekStartPref
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventFormField
+import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
 
 /**
@@ -17,7 +19,17 @@ data class SettingsUiState(
     val themeMode: ThemeMode = ThemeMode.SYSTEM,
     val dynamicColor: Boolean = true,
     val dynamicColorAvailable: Boolean = true,
-    val weekStart: WeekStartPref = WeekStartPref.AUTO,
+    val weekStart: WeekStartPref = WeekStartPref.Auto,
+    /** Clock convention for time labels (v2.11). AUTO follows the system setting. */
+    val timeFormat: TimeFormatPref = TimeFormatPref.AUTO,
+    /** Whether the week/day timeline draws an hour separator line (v2.11). */
+    val showHourLines: Boolean = false,
+    /** How far ahead the in-app Agenda screen shows events (v2.11). */
+    val agendaScreenRange: AgendaRange = AgendaRange.Month,
+    /** How far ahead the agenda widget shows events (v2.11). */
+    val agendaWidgetRange: AgendaRange = AgendaRange.Month,
+    /** Whether the agenda shows its top range bar — header + switcher (v2.11). */
+    val agendaShowRangeBar: Boolean = true,
     /** The calendar view the app opens on, and the home of the view back stack (M1). */
     val defaultView: CalendarView = CalendarView.Week,
     /** Optional event-form fields shown by default (rest behind "more fields"). */

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

@@ -1,17 +1,28 @@
 package de.jeanlucmakiola.calendula.ui.settings
 
+import android.content.Context
 import android.os.Build
+import androidx.glance.appwidget.GlanceAppWidgetManager
+import androidx.glance.appwidget.state.updateAppWidgetState
+import androidx.glance.appwidget.updateAll
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
+import dagger.hilt.android.qualifiers.ApplicationContext
 import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
-import de.jeanlucmakiola.calendula.data.prefs.CalendarReminderOverride
 import de.jeanlucmakiola.calendula.data.prefs.SettingsPrefs
 import de.jeanlucmakiola.calendula.data.prefs.ThemeMode
+import de.jeanlucmakiola.floret.reminders.ReminderOverride
+import de.jeanlucmakiola.calendula.data.prefs.TimeFormatPref
 import de.jeanlucmakiola.calendula.data.prefs.WeekStartPref
 import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventFormField
+import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
+import de.jeanlucmakiola.calendula.ui.agenda.storageValue
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
+import de.jeanlucmakiola.calendula.widget.agenda.AGENDA_RANGE_KEY
+import de.jeanlucmakiola.calendula.widget.agenda.AgendaWidget
+import de.jeanlucmakiola.calendula.widget.month.MonthWidget
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
@@ -20,12 +31,15 @@ import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
 import javax.inject.Inject
 
 @HiltViewModel
 class SettingsViewModel @Inject constructor(
     private val prefs: SettingsPrefs,
     repository: CalendarRepository,
+    @ApplicationContext private val appContext: Context,
 ) : ViewModel() {
 
     private val dynamicColorAvailable = Build.VERSION.SDK_INT >= Build.VERSION_CODES.S
@@ -73,10 +87,24 @@ class SettingsViewModel @Inject constructor(
             ) { overrides, allDayOverrides, calendars ->
                 ReminderOverrides(overrides, allDayOverrides, calendars)
             },
+            combine(
                 prefs.defaultView,
-        ) { base, defaults, overrides, defaultView ->
+                prefs.agendaScreenRange,
+                prefs.agendaWidgetRange,
+                prefs.timeFormat,
+                prefs.showHourLines,
+            ) { view, screenRange, widgetRange, timeFormat, showHourLines ->
+                ViewSettings(view, screenRange, widgetRange, timeFormat, showHourLines)
+            },
+            prefs.agendaShowRangeBar,
+        ) { base, defaults, overrides, views, showRangeBar ->
             base.copy(
-                defaultView = defaultView,
+                defaultView = views.defaultView,
+                agendaScreenRange = views.agendaScreenRange,
+                agendaWidgetRange = views.agendaWidgetRange,
+                timeFormat = views.timeFormat,
+                showHourLines = views.showHourLines,
+                agendaShowRangeBar = showRangeBar,
                 allowColorOnUnsupportedCalendars = defaults.allowColor,
                 defaultReminderMinutes = defaults.defaultReminder,
                 defaultAllDayReminderMinutes = defaults.allDayReminder,
@@ -92,6 +120,12 @@ class SettingsViewModel @Inject constructor(
             initialValue = SettingsUiState(dynamicColorAvailable = dynamicColorAvailable),
         )
 
+    // Serialises widget redraws so a rapid flip-and-flip-back can't run two
+    // updateAll calls at once — concurrent calls coalesce around a stale read
+    // and can leave the widget on the intermediate value. Held sequentially,
+    // the last call reads the final committed pref and renders it.
+    private val widgetRefreshMutex = Mutex()
+
     private data class ReminderDefaults(
         val allowColor: Boolean,
         val defaultReminder: Int?,
@@ -106,6 +140,14 @@ class SettingsViewModel @Inject constructor(
         val calendars: List<CalendarSource>,
     )
 
+    private data class ViewSettings(
+        val defaultView: CalendarView,
+        val agendaScreenRange: AgendaRange,
+        val agendaWidgetRange: AgendaRange,
+        val timeFormat: TimeFormatPref,
+        val showHourLines: Boolean,
+    )
+
     fun setThemeMode(mode: ThemeMode) {
         viewModelScope.launch { prefs.setThemeMode(mode) }
     }
@@ -115,7 +157,48 @@ class SettingsViewModel @Inject constructor(
     }
 
     fun setWeekStart(pref: WeekStartPref) {
-        viewModelScope.launch { prefs.setWeekStart(pref) }
+        viewModelScope.launch {
+            prefs.setWeekStart(pref)
+            // Both widgets depend on the week start (month weekday header; the
+            // agenda widget's "this week" range).
+            widgetRefreshMutex.withLock {
+                AgendaWidget().updateAll(appContext)
+                MonthWidget().updateAll(appContext)
+            }
+        }
+    }
+
+    fun setAgendaScreenRange(range: AgendaRange) {
+        viewModelScope.launch { prefs.setAgendaScreenRange(range) }
+    }
+
+    fun setAgendaWidgetRange(range: AgendaRange) {
+        viewModelScope.launch {
+            prefs.setAgendaWidgetRange(range)
+            widgetRefreshMutex.withLock {
+                // Push the range into each instance's Glance state and recompose.
+                // The widget reads it via currentState, so this reflects reliably
+                // even when updateAll only recomposes a live session (it does not
+                // re-run provideGlance's data preamble).
+                val manager = GlanceAppWidgetManager(appContext)
+                manager.getGlanceIds(AgendaWidget::class.java).forEach { id ->
+                    updateAppWidgetState(appContext, id) { it[AGENDA_RANGE_KEY] = range.storageValue() }
+                }
+                AgendaWidget().updateAll(appContext)
+            }
+        }
+    }
+
+    fun setAgendaShowRangeBar(enabled: Boolean) {
+        viewModelScope.launch { prefs.setAgendaShowRangeBar(enabled) }
+    }
+
+    fun setTimeFormat(pref: TimeFormatPref) {
+        viewModelScope.launch { prefs.setTimeFormat(pref) }
+    }
+
+    fun setShowHourLines(enabled: Boolean) {
+        viewModelScope.launch { prefs.setShowHourLines(enabled) }
     }
 
     fun setDefaultView(view: CalendarView) {
@@ -146,11 +229,11 @@ class SettingsViewModel @Inject constructor(
         viewModelScope.launch { prefs.setSnoozeMinutes(minutes) }
     }
 
-    fun setCalendarReminderOverride(calendarId: Long, override: CalendarReminderOverride) {
+    fun setCalendarReminderOverride(calendarId: Long, override: ReminderOverride) {
         viewModelScope.launch { prefs.setCalendarReminderOverride(calendarId, override) }
     }
 
-    fun setCalendarAllDayReminderOverride(calendarId: Long, override: CalendarReminderOverride) {
+    fun setCalendarAllDayReminderOverride(calendarId: Long, override: ReminderOverride) {
         viewModelScope.launch { prefs.setCalendarAllDayReminderOverride(calendarId, override) }
     }
 

app/src/main/java/de/jeanlucmakiola/calendula/ui/theme/Theme.kt

@@ -1,49 +1,31 @@
 package de.jeanlucmakiola.calendula.ui.theme
 
-import android.os.Build
 import androidx.compose.foundation.isSystemInDarkTheme
-import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
-import androidx.compose.material3.MaterialExpressiveTheme
-import androidx.compose.material3.MotionScheme
-import androidx.compose.material3.dynamicDarkColorScheme
-import androidx.compose.material3.dynamicLightColorScheme
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.platform.LocalContext
+import de.jeanlucmakiola.floret.identity.FloretExpressiveTheme
 
 /**
- * App theme. Honors:
+ * Calendula's theme: the family's [FloretExpressiveTheme] machinery — dynamic
- *   - System light/dark.
+ * colour on API 31+, system light/dark, and the **standard** motion scheme
- *   - Dynamic Color on API 31+, else falls back to the hand-tuned scheme
+ * (spring choreography without the overshoot) — fed with Calendula's own
- *     derived from [CalendulaSeed].
+ * identity: its seed-derived fallback schemes ([CalendulaLightFallback] /
+ * [CalendulaDarkFallback]) and [CalendulaTypography].
  *
- * The Settings screen (later) can override useDynamicColor and themePreference,
+ * The mechanics live in floret-kit's identity module; the look stays here, so a
- * but the V1 foundation just follows the system.
+ * sibling app reuses the same theming without inheriting Calendula's palette.
  */
-@OptIn(ExperimentalMaterial3ExpressiveApi::class)
 @Composable
 fun CalendulaTheme(
     darkTheme: Boolean = isSystemInDarkTheme(),
     dynamicColor: Boolean = true,
     content: @Composable () -> Unit,
 ) {
-    val colorScheme = when {
+    FloretExpressiveTheme(
-        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+        lightScheme = CalendulaLightFallback,
-            val ctx = LocalContext.current
+        darkScheme = CalendulaDarkFallback,
-            if (darkTheme) dynamicDarkColorScheme(ctx) else dynamicLightColorScheme(ctx)
+        darkTheme = darkTheme,
-        }
+        dynamicColor = dynamicColor,
-        darkTheme -> CalendulaDarkFallback
-        else -> CalendulaLightFallback
-    }
-
-    // MaterialExpressiveTheme routes all component + custom motion through
-    // MaterialTheme.motionScheme (switches, chips, pickers, calendar slide,
-    // FAB, field reveal). The STANDARD scheme is a deliberate choice over
-    // expressive(): same spring choreography, but without the overshoot —
-    // the bouncy variant felt overdone in review (2026-06-11).
-    MaterialExpressiveTheme(
-        colorScheme = colorScheme,
         typography = CalendulaTypography,
-        motionScheme = MotionScheme.standard(),
         content = content,
     )
 }

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

@@ -81,11 +81,16 @@ import de.jeanlucmakiola.calendula.ui.common.NowLine
 import de.jeanlucmakiola.calendula.ui.common.ViewSwitcherPill
 import de.jeanlucmakiola.calendula.ui.common.calendarSlideTransition
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarFadeSpec
-import de.jeanlucmakiola.calendula.ui.common.rememberReduceMotion
+import de.jeanlucmakiola.floret.identity.rememberReduceMotion
 import de.jeanlucmakiola.calendula.ui.common.currentLocale
+import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
+import de.jeanlucmakiola.calendula.ui.common.LocalShowHourLines
+import de.jeanlucmakiola.calendula.ui.common.formatHourLabel
+import de.jeanlucmakiola.calendula.ui.common.formatMinuteOfDay
+import de.jeanlucmakiola.calendula.ui.common.hourSeparatorLines
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarSlideSpec
 import de.jeanlucmakiola.calendula.ui.common.next
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.floret.components.pastelize
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
 import kotlinx.datetime.LocalDate
@@ -572,6 +577,8 @@ private fun Timeline(
 ) {
     val totalHeight = HOUR_HEIGHT * 24
     val dark = isSystemInDarkTheme()
+    val use24Hour = LocalUse24HourFormat.current
+    val locale = currentLocale()
 
     Box(modifier = Modifier.fillMaxSize()) {
         // Gutter and day columns are two scroll viewports that SHARE one scroll
@@ -595,7 +602,7 @@ private fun Timeline(
                     ) {
                         if (h > 0) {
                             Text(
-                                text = "%02d".format(h),
+                                text = formatHourLabel(h, use24Hour, locale),
                                 style = MaterialTheme.typography.labelSmall,
                                 color = MaterialTheme.colorScheme.onSurfaceVariant,
                                 modifier = Modifier
@@ -650,6 +657,8 @@ private fun DayColumnCard(
     modifier: Modifier = Modifier,
 ) {
     val hourPx = with(LocalDensity.current) { HOUR_HEIGHT.toPx() }
+    val showHourLines = LocalShowHourLines.current
+    val hourLineColor = MaterialTheme.colorScheme.outlineVariant
     Card(
         // Plain rectangular columns — the soft corners come from the outer
         // rounded scroll viewport, so inner rounding would look odd at the edges.
@@ -662,6 +671,9 @@ private fun DayColumnCard(
         BoxWithConstraints(
             modifier = Modifier
                 .fillMaxSize()
+                // Faint hour separators sit over the column background but under
+                // the event blocks (drawBehind paints before the children).
+                .hourSeparatorLines(showHourLines, hourPx, hourLineColor)
                 // Tap an empty slot to create an event there; taps on event
                 // blocks are consumed by their own handler first. Snaps to hour.
                 .pointerInput(date) {
@@ -704,7 +716,10 @@ private fun EventBlock(
     modifier: Modifier = Modifier,
 ) {
     val title = block.event.title.ifBlank { stringResource(R.string.event_untitled) }
-    val timeLabel = "${minToHm(block.startMin)}–${minToHm(block.endMin)}"
+    val use24Hour = LocalUse24HourFormat.current
+    val locale = currentLocale()
+    val timeLabel = "${minToHm(block.startMin, use24Hour, locale)}–" +
+        minToHm(block.endMin, use24Hour, locale)
     val showTime = block.endMin - block.startMin >= 45
     Box(
         modifier = modifier
@@ -773,8 +788,8 @@ private fun WeekLoading() {
     }
 }
 
-private fun minToHm(min: Int): String =
+private fun minToHm(min: Int, is24Hour: Boolean, locale: java.util.Locale): String =
-    if (min >= MINUTES_PER_DAY) "24:00" else "%02d:%02d".format(min / 60, min % 60)
+    formatMinuteOfDay(min, is24Hour, locale)
 
 private fun formatWeekRange(weekStart: LocalDate): String {
     val locale = Locale.getDefault()

app/src/main/java/de/jeanlucmakiola/calendula/widget/WidgetData.kt

@@ -4,9 +4,11 @@ import android.Manifest
 import android.content.Context
 import android.content.pm.PackageManager
 import androidx.core.content.ContextCompat
+import de.jeanlucmakiola.calendula.data.prefs.is24Hour
 import de.jeanlucmakiola.calendula.data.prefs.resolveFirstDay
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.ui.agenda.AgendaDay
+import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
 import de.jeanlucmakiola.calendula.ui.agenda.agendaRange
 import de.jeanlucmakiola.calendula.ui.agenda.groupAgendaDays
 import kotlinx.coroutines.flow.first
@@ -23,9 +25,6 @@ import kotlinx.datetime.toLocalDateTime
 import java.util.Locale
 import kotlin.time.Clock
 
-/** How far ahead the agenda widget loads (a month of upcoming events). */
-private const val AGENDA_WIDGET_DAYS = 30
-
 /**
  * How far either side of today the month widget pre-loads. The displayed month
  * is chosen reactively in the composition, so one wide read covers ~13 months of
@@ -46,7 +45,22 @@ internal fun Context.hasCalendarPermission(): Boolean =
 sealed interface AgendaWidgetData {
     /** Calendar permission not granted — the widget can't read events. */
     data object NeedsPermission : AgendaWidgetData
-    data class Ready(val today: LocalDate, val days: List<AgendaDay>) : AgendaWidgetData
+    data class Ready(
+        val today: LocalDate,
+        /**
+         * Days with events across the **widest** selectable window. The displayed
+         * range is sliced from this in the composition (read reactively from
+         * Glance state), so a range change is pure recomposition rather than a
+         * flaky widget session restart — the same approach the month widget uses.
+         */
+        val days: List<AgendaDay>,
+        /** Resolved clock convention for event time labels (the time-format pref). */
+        val is24Hour: Boolean,
+        /** First day of the week, for the calendar-aligned "this week" range. */
+        val weekStart: DayOfWeek,
+        /** Saved range pref — the fallback when an instance has no Glance state yet. */
+        val savedRange: AgendaRange,
+    ) : AgendaWidgetData
 }
 
 /**
@@ -91,9 +105,24 @@ internal suspend fun Context.loadAgendaWidgetData(): AgendaWidgetData {
     if (!hasCalendarPermission()) return AgendaWidgetData.NeedsPermission
     val zone = systemZone()
     val anchor = today(zone)
-    val repo = widgetEntryPoint().calendarRepository()
+    val ep = widgetEntryPoint()
-    val instances = repo.instances(agendaRange(anchor, AGENDA_WIDGET_DAYS, zone)).first()
+    val prefs = ep.settingsPrefs()
-    return AgendaWidgetData.Ready(today = anchor, days = groupAgendaDays(anchor, instances, zone))
+    val savedRange = prefs.agendaWidgetRange.first()
+    val weekStart = prefs.weekStart.first().resolveFirstDay(Locale.getDefault())
+    // Load the widest selectable window once; the displayed range is sliced in
+    // the composition from Glance state, so changing the range is a plain
+    // recomposition and never depends on the widget session restarting.
+    val window = agendaRange(anchor, AgendaRange.MAX_CUSTOM_DAYS - 1, zone)
+    val instances = ep.calendarRepository().instances(window).first()
+    val is24Hour = prefs.timeFormat.first()
+        .is24Hour(android.text.format.DateFormat.is24HourFormat(this))
+    return AgendaWidgetData.Ready(
+        today = anchor,
+        days = groupAgendaDays(anchor, instances, zone),
+        is24Hour = is24Hour,
+        weekStart = weekStart,
+        savedRange = savedRange,
+    )
 }
 
 /** One-shot wide read backing the month widget's grid for any nearby month. */

app/src/main/java/de/jeanlucmakiola/calendula/widget/agenda/AgendaWidget.kt

@@ -6,6 +6,7 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.datastore.preferences.core.stringPreferencesKey
 import androidx.glance.ColorFilter
 import androidx.glance.GlanceId
 import androidx.glance.GlanceModifier
@@ -24,6 +25,8 @@ import androidx.glance.appwidget.lazy.items
 import androidx.glance.appwidget.provideContent
 import androidx.glance.appwidget.updateAll
 import androidx.glance.background
+import androidx.glance.currentState
+import androidx.glance.state.PreferencesGlanceStateDefinition
 import androidx.glance.layout.Alignment
 import androidx.glance.layout.Box
 import androidx.glance.layout.Column
@@ -41,8 +44,12 @@ import androidx.glance.text.TextStyle
 import de.jeanlucmakiola.calendula.MainActivity
 import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.domain.EventInstance
+import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
+import de.jeanlucmakiola.calendula.ui.agenda.dayCount
+import de.jeanlucmakiola.calendula.ui.agenda.parseAgendaRange
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.calendula.ui.common.formatTimeOfDay
+import de.jeanlucmakiola.floret.components.pastelize
 import de.jeanlucmakiola.calendula.widget.AgendaWidgetData
 import de.jeanlucmakiola.calendula.widget.CalendulaGlanceTheme
 import de.jeanlucmakiola.calendula.widget.loadAgendaWidgetData
@@ -62,8 +69,20 @@ import java.util.Locale
  * of events grouped under day headers (the Google "Schedule" widget model).
  * Reuses the app's [groupAgendaDays] grouping so it matches the in-app agenda.
  */
+/**
+ * Per-instance Glance state key holding the agenda range (as [AgendaRange.storageValue]).
+ * The range is read reactively in the composition ([currentState]) so a settings
+ * change is reflected by plain recomposition — `updateAll` does NOT reliably
+ * re-run the `provideGlance` preamble for a live widget session, so loading the
+ * range there and slicing it would silently keep the stale value (mirrors the
+ * month widget's MONTH_INDEX_KEY approach).
+ */
+internal val AGENDA_RANGE_KEY = stringPreferencesKey("agenda_range")
+
 class AgendaWidget : GlanceAppWidget() {
 
+    override val stateDefinition = PreferencesGlanceStateDefinition
+
     override suspend fun provideGlance(context: Context, id: GlanceId) {
         val data = context.loadAgendaWidgetData()
         val dark = (context.resources.configuration.uiMode and
@@ -101,12 +120,21 @@ private fun AgendaWidgetBody(data: AgendaWidgetData, dark: Boolean) {
         Spacer(GlanceModifier.height(4.dp))
         when (data) {
             AgendaWidgetData.NeedsPermission -> WidgetMessage(R.string.widget_needs_permission)
-            is AgendaWidgetData.Ready ->
+            is AgendaWidgetData.Ready -> {
-                if (data.days.isEmpty()) {
+                // Range read reactively from per-instance Glance state (falls back
+                // to the saved pref for a freshly placed widget), then the wide
+                // pre-loaded window is sliced to it — pure recomposition.
+                val range = parseAgendaRange(currentState(AGENDA_RANGE_KEY), data.savedRange)
+                val rangeEnd = data.today.plus(
+                    range.dayCount(data.today, data.weekStart) - 1,
+                    DateTimeUnit.DAY,
+                )
+                val visibleDays = data.days.filter { it.date <= rangeEnd }
+                if (visibleDays.isEmpty()) {
                     WidgetMessage(R.string.agenda_empty_title)
                 } else {
                     val rows = buildList {
-                        data.days.forEach { day ->
+                        visibleDays.forEach { day ->
                             add(AgendaRow.Header(day.date, data.today))
                             day.events.forEach { add(AgendaRow.Event(it)) }
                         }
@@ -115,7 +143,8 @@ private fun AgendaWidgetBody(data: AgendaWidgetData, dark: Boolean) {
                         items(rows.size) { index ->
                             when (val row = rows[index]) {
                                 is AgendaRow.Header -> DayHeaderRow(row.date, row.today)
-                                is AgendaRow.Event -> EventRow(row.event, dark)
+                                is AgendaRow.Event -> EventRow(row.event, dark, data.is24Hour)
+                            }
                         }
                     }
                 }
@@ -195,7 +224,7 @@ private fun DayHeaderRow(date: LocalDate, today: LocalDate) {
 }
 
 @Composable
-private fun EventRow(event: EventInstance, dark: Boolean) {
+private fun EventRow(event: EventInstance, dark: Boolean, is24Hour: Boolean) {
     val context = androidx.glance.LocalContext.current
     val title = event.title.ifBlank { context.getString(R.string.event_untitled) }
     Row(
@@ -230,7 +259,7 @@ private fun EventRow(event: EventInstance, dark: Boolean) {
                 style = TextStyle(color = GlanceTheme.colors.onSurface, fontSize = 14.sp),
             )
             Text(
-                text = eventTimeSummary(context, event),
+                text = eventTimeSummary(context, event, is24Hour),
                 maxLines = 1,
                 style = TextStyle(color = GlanceTheme.colors.onSurfaceVariant, fontSize = 12.sp),
             )
@@ -269,17 +298,17 @@ private fun agendaDayLabel(context: Context, date: LocalDate, today: LocalDate):
     return if (relative != null) "$relative · $formatted" else formatted
 }
 
-private fun eventTimeSummary(context: Context, event: EventInstance): String {
+private fun eventTimeSummary(context: Context, event: EventInstance, is24Hour: Boolean): String {
     val time = if (event.isAllDay) {
         context.getString(R.string.event_detail_all_day)
     } else {
-        "${formatTime(event.start)} – ${formatTime(event.end)}"
+        "${formatTime(event.start, is24Hour)} – ${formatTime(event.end, is24Hour)}"
     }
     val location = event.location?.takeIf { it.isNotBlank() }
     return if (location != null) "$time · $location" else time
 }
 
-private fun formatTime(instant: Instant): String {
+private fun formatTime(instant: Instant, is24Hour: Boolean): String {
     val t = instant.toLocalDateTime(zone()).time
-    return "%02d:%02d".format(t.hour, t.minute)
+    return formatTimeOfDay(t.hour, t.minute, is24Hour, Locale.getDefault())
 }

app/src/main/java/de/jeanlucmakiola/calendula/widget/month/MonthWidget.kt

@@ -50,7 +50,7 @@ import de.jeanlucmakiola.calendula.MainActivity
 import de.jeanlucmakiola.calendula.R
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
-import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.floret.components.pastelize
 import de.jeanlucmakiola.calendula.ui.month.MonthWeek
 import de.jeanlucmakiola.calendula.ui.month.layoutMonthWeeks
 import de.jeanlucmakiola.calendula.widget.CalendulaGlanceTheme

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

@@ -230,8 +230,7 @@
     <string name="agenda_today_action">Heute</string>
     <string name="agenda_header_today">Heute</string>
     <string name="agenda_header_tomorrow">Morgen</string>
-    <string name="agenda_empty_title">Nichts geplant</string>
+    <string name="agenda_empty_title">Alles erledigt</string>
-    <string name="agenda_empty_subtitle">Anstehende Termine erscheinen hier.</string>
 
     <!-- Terminsuche -->
     <string name="search_action">Suchen</string>
@@ -267,6 +266,7 @@
     <!-- Einstellungen (M4) -->
     <string name="settings_title">Einstellungen</string>
     <string name="settings_back">Zurück</string>
+    <string name="back">Zurück</string>
     <string name="settings_section_appearance">Darstellung</string>
     <string name="settings_theme">Design</string>
     <string name="settings_theme_system">System</string>
@@ -276,8 +276,31 @@
     <string name="settings_dynamic_color_unavailable">Erfordert Android 12 oder neuer</string>
     <string name="settings_week_start">Wochenstart</string>
     <string name="settings_week_start_auto">Automatisch</string>
-    <string name="settings_week_start_monday">Montag</string>
+    <string name="settings_time_format">Zeitformat</string>
-    <string name="settings_week_start_sunday">Sonntag</string>
+    <string name="settings_time_format_auto">Automatisch</string>
+    <string name="settings_time_format_12h">12-Stunden (2:00 PM)</string>
+    <string name="settings_time_format_24h">24-Stunden (14:00)</string>
+    <string name="settings_hour_lines">Stundenlinien</string>
+    <string name="settings_hour_lines_summary">Trennlinie zu jeder vollen Stunde in Wochen- und Tagesansicht anzeigen</string>
+    <string name="settings_agenda_range">Agenda-Zeitraum</string>
+    <string name="settings_agenda_range_hint">Wie weit im Voraus die Agenda-Ansicht Termine anzeigt.</string>
+    <string name="settings_agenda_widget_range">Agenda-Widget-Zeitraum</string>
+    <string name="settings_agenda_widget_range_hint">Wie weit im Voraus das Agenda-Widget auf dem Startbildschirm Termine anzeigt.</string>
+    <string name="settings_agenda_range_bar">Zeitraum-Leiste</string>
+    <string name="settings_agenda_range_bar_hint">Eine Leiste oben in der Agenda anzeigen, die den dargestellten Zeitraum benennt, mit einer Schaltfläche zum Wechseln des Zeitraums für die Sitzung</string>
+    <string name="agenda_range_day">Heute</string>
+    <string name="agenda_range_this_week">Diese Woche</string>
+    <string name="agenda_range_this_month">Dieser Monat</string>
+    <string name="agenda_range_week">Nächste 7 Tage</string>
+    <string name="agenda_range_month">Nächste 30 Tage</string>
+    <string name="agenda_range_custom">Benutzerdefiniert…</string>
+    <string name="agenda_range_custom_hint">Tage</string>
+    <string name="agenda_range_override_hint">Nur vorübergehend — wird beim erneuten Öffnen von Calendula auf deinen gespeicherten Zeitraum zurückgesetzt.</string>
+    <string name="agenda_range_showing_label">Alle anstehenden Termine für</string>
+    <plurals name="agenda_range_days">
+        <item quantity="one">%d Tag</item>
+        <item quantity="other">%d Tage</item>
+    </plurals>
     <string name="settings_section_event_form">Termin-Formular</string>
     <string name="settings_form_fields_hint">Standardmäßig angezeigte Felder — alles Weitere liegt hinter \"Weitere Felder\"</string>
     <string name="settings_color_unsupported">Farben auf nicht unterstützten Kalendern erlauben</string>
@@ -377,14 +400,14 @@
     </plurals>
 
     <!-- Absturzberichte: vom Nutzer selbst als Gitea-Issue einreichbar -->
-    <string name="crash_dialog_title">Calendula ist abgestürzt</string>
+    <string name="crash_dialog_title">%1$s ist abgestürzt</string>
-    <string name="crash_dialog_message">Calendula wurde beim letzten Mal unerwartet beendet. Du kannst bei der Behebung helfen, indem du diesen Bericht als Issue sendest. Er bleibt auf deinem Gerät, bis du ihn teilst, und enthält keine persönlichen Daten oder Kalenderinhalte — nur die technischen Angaben unten.</string>
+    <string name="crash_dialog_message">%1$s wurde beim letzten Mal unerwartet beendet. Du kannst bei der Behebung helfen, indem du diesen Bericht als Issue sendest. Er bleibt auf deinem Gerät, bis du ihn teilst, und enthält keine persönlichen Daten oder Kalenderinhalte — nur die technischen Angaben unten.</string>
     <string name="crash_dialog_report">Melden</string>
     <string name="crash_dialog_dismiss">Nicht jetzt</string>
     <string name="crash_report_issue_title">Absturzbericht</string>
-    <string name="crash_report_clip_label">Calendula-Absturzbericht</string>
+    <string name="crash_report_clip_label">%1$s-Absturzbericht</string>
     <string name="crash_report_copied">Bericht in die Zwischenablage kopiert</string>
     <string name="crash_report_open_failed">Der Issue-Tracker konnte nicht geöffnet werden. Der Bericht ist in deiner Zwischenablage.</string>
-    <string name="crash_report_body_template">Danke, dass du einen Absturz in Calendula meldest. Bitte ergänze, was du gerade getan hast, und sende dann ab.\n\n### Was ist passiert\n\n\n### Absturzbericht\n%1$s\n</string>
+    <string name="crash_report_body_template">Danke, dass du einen Absturz in %1$s meldest. Bitte ergänze, was du gerade getan hast, und sende dann ab.\n\n### Was ist passiert\n\n\n### Absturzbericht\n%2$s\n</string>
     <string name="crash_report_body_paste">_(Der Bericht war zu lang für diesen Link — füge ihn aus deiner Zwischenablage hier ein.)_</string>
 </resources>

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

@@ -197,6 +197,14 @@
         <item quantity="one">%d hour</item>
         <item quantity="other">%d hours</item>
     </plurals>
+    <plurals name="duration_days">
+        <item quantity="one">%d day</item>
+        <item quantity="other">%d days</item>
+    </plurals>
+    <plurals name="duration_weeks">
+        <item quantity="one">%d week</item>
+        <item quantity="other">%d weeks</item>
+    </plurals>
 
     <!-- Shared event strings -->
     <string name="event_untitled">(No title)</string>
@@ -231,8 +239,7 @@
     <string name="agenda_today_action">Today</string>
     <string name="agenda_header_today">Today</string>
     <string name="agenda_header_tomorrow">Tomorrow</string>
-    <string name="agenda_empty_title">Nothing scheduled</string>
+    <string name="agenda_empty_title">You\'re all caught up</string>
-    <string name="agenda_empty_subtitle">Upcoming events will show up here.</string>
 
     <!-- Event search -->
     <string name="search_action">Search</string>
@@ -259,6 +266,8 @@
     <!-- Settings (M4) -->
     <string name="settings_title">Settings</string>
     <string name="settings_back">Back</string>
+    <!-- Overrides floret-kit components' CollapsingScaffold back-button label. -->
+    <string name="back">Back</string>
     <string name="settings_section_appearance">Appearance</string>
     <string name="settings_theme">Theme</string>
     <string name="settings_theme_system">System</string>
@@ -269,8 +278,31 @@
     <string name="settings_dynamic_color_unavailable">Requires Android 12 or newer</string>
     <string name="settings_week_start">Week starts on</string>
     <string name="settings_week_start_auto">Automatic</string>
-    <string name="settings_week_start_monday">Monday</string>
+    <string name="settings_time_format">Time format</string>
-    <string name="settings_week_start_sunday">Sunday</string>
+    <string name="settings_time_format_auto">Automatic</string>
+    <string name="settings_time_format_12h">12-hour (2:00 PM)</string>
+    <string name="settings_time_format_24h">24-hour (14:00)</string>
+    <string name="settings_hour_lines">Hour lines</string>
+    <string name="settings_hour_lines_summary">Show a separator line at each hour in week and day view</string>
+    <string name="settings_agenda_range">Agenda range</string>
+    <string name="settings_agenda_range_hint">How far ahead the Agenda screen lists events.</string>
+    <string name="settings_agenda_widget_range">Agenda widget range</string>
+    <string name="settings_agenda_widget_range_hint">How far ahead the agenda home-screen widget lists events.</string>
+    <string name="settings_agenda_range_bar">Range bar</string>
+    <string name="settings_agenda_range_bar_hint">Show a bar at the top of the agenda naming the dates shown, with a button to switch the range for the session</string>
+    <string name="agenda_range_day">Today</string>
+    <string name="agenda_range_this_week">This week</string>
+    <string name="agenda_range_this_month">This month</string>
+    <string name="agenda_range_week">Next 7 days</string>
+    <string name="agenda_range_month">Next 30 days</string>
+    <string name="agenda_range_custom">Custom…</string>
+    <string name="agenda_range_custom_hint">Days</string>
+    <string name="agenda_range_override_hint">Just for now — resets to your saved range when you reopen Calendula.</string>
+    <string name="agenda_range_showing_label">Showing all upcoming events for</string>
+    <plurals name="agenda_range_days">
+        <item quantity="one">%d day</item>
+        <item quantity="other">%d days</item>
+    </plurals>
     <string name="settings_section_event_form">New event form</string>
     <string name="settings_form_fields_hint">Fields shown by default — everything else sits behind \"More fields\"</string>
     <string name="settings_color_unsupported">Allow colors on unsupported calendars</string>
@@ -287,6 +319,7 @@
     <string name="reminder_custom_amount">Amount</string>
     <string name="reminder_custom_with_value">Custom (%1$s)</string>
     <string name="reminder_custom_set">Set</string>
+    <string name="settings_calendar_reminders_title">Per-calendar reminders</string>
     <string name="settings_calendar_reminders_hint">Override the default per calendar — separately for timed and all-day events. A calendar can keep the default, drop it, or set its own.</string>
     <string name="settings_calendar_reminder_inherits">Default (%1$s)</string>
     <string name="settings_reliable_delivery">Reliable delivery</string>
@@ -299,6 +332,8 @@
     <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_translate">Help translate</string>
+    <string name="settings_translate_hint">Add or improve a language on Weblate</string>
     <!-- Hub category subtitles -->
     <string name="settings_appearance_subtitle">Theme, default view, week start</string>
     <string name="settings_event_form_subtitle">Default fields for new events</string>
@@ -323,7 +358,10 @@
     <string name="calendars_show_in_app_a11y">Show \"%1$s\" in the app</string>
     <string name="calendars_synced_header">Synced calendars</string>
     <string name="calendars_synced_hint">These come from accounts on your device. Create and edit them in their own app.</string>
-    <string name="calendars_manage_in_app">Manage</string>
+    <string name="calendars_manage_in_app">Manage in app</string>
+    <string name="calendars_account_menu_a11y">More options for %1$s</string>
+    <string name="calendars_enable_all">Enable all</string>
+    <string name="calendars_disable_all">Disable all</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>
@@ -337,6 +375,26 @@
     <string name="calendars_backup_header">Backup</string>
     <string name="calendars_backup_hint">Local calendars aren\'t synced anywhere, so export them to an .ics file to keep a copy.</string>
     <string name="calendars_backup_action">Export as .ics file</string>
+    <string name="calendars_auto_backup">Automatic backup</string>
+    <string name="calendars_auto_backup_hint">Periodically export your local calendars to a folder as an .ics file.</string>
+    <string name="calendars_auto_backup_folder">Backup folder</string>
+    <string name="calendars_auto_backup_folder_unset">Tap to choose a folder</string>
+    <string name="calendars_auto_backup_interval">Interval</string>
+    <string name="calendars_auto_backup_every">Every %1$s</string>
+    <string name="calendars_auto_backup_interval_min">Minimum 30 minutes.</string>
+    <string name="calendars_auto_backup_status_never">No automatic backup yet</string>
+    <string name="calendars_auto_backup_status_ok">Last backup: %1$s</string>
+    <string name="calendars_auto_backup_status_failed">Last backup failed: %1$s</string>
+    <string name="backup_channel_name">Backup</string>
+    <string name="backup_channel_description">Warns if automatic backups fail repeatedly.</string>
+    <string name="backup_failed_title">Automatic backup failed</string>
+    <string name="backup_failed_text">Calendula couldn\'t write the backup file. Check the backup folder in Settings.</string>
+    <string-array name="backup_interval_units">
+        <item>Minutes</item>
+        <item>Hours</item>
+        <item>Days</item>
+        <item>Weeks</item>
+    </string-array>
     <string name="calendars_backup_failed">Couldn\'t export the backup.</string>
     <plurals name="calendars_backup_done">
         <item quantity="one">Exported %d event.</item>
@@ -382,18 +440,19 @@
     <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>
     <string name="about_support_url" translatable="false">https://ko-fi.com/jeanlucmakiola</string>
+    <string name="about_translate_url" translatable="false">https://weblate.dev.jeanlucmakiola.de/engage/calendula/</string>
 
     <!-- Crash reporting: a captured report the user can submit, by hand, as a
          Gitea issue (the app sends nothing automatically). -->
-    <string name="crash_dialog_title">Calendula crashed</string>
+    <string name="crash_dialog_title">%1$s crashed</string>
-    <string name="crash_dialog_message">Calendula closed unexpectedly last time. You can help fix it by sending this report as an issue. It stays on your device until you choose to share it, and includes no personal data or calendar content — only the technical details below.</string>
+    <string name="crash_dialog_message">%1$s closed unexpectedly last time. You can help fix it by sending this report as an issue. It stays on your device until you choose to share it, and includes no personal data or calendar content — only the technical details below.</string>
     <string name="crash_dialog_report">Report</string>
     <string name="crash_dialog_dismiss">Not now</string>
     <string name="crash_report_issue_title">Crash report</string>
-    <string name="crash_report_clip_label">Calendula crash report</string>
+    <string name="crash_report_clip_label">%1$s crash report</string>
     <string name="crash_report_copied">Report copied to your clipboard</string>
     <string name="crash_report_open_failed">Couldn\'t open the issue tracker. The report is on your clipboard.</string>
-    <string name="crash_report_body_template">Thanks for reporting a crash in Calendula. Please add anything you remember about what you were doing, then submit.\n\n### What happened\n\n\n### Crash report\n%1$s\n</string>
+    <string name="crash_report_body_template">Thanks for reporting a crash in %1$s. Please add anything you remember about what you were doing, then submit.\n\n### What happened\n\n\n### Crash report\n%2$s\n</string>
     <string name="crash_report_body_paste">_(The report was too long for this link — paste it from your clipboard here.)_</string>
     <string name="report_issue_url" translatable="false">https://codeberg.org/jlmakiola/calendula/issues/new</string>
     <string name="report_issue_choose_url" translatable="false">https://codeberg.org/jlmakiola/calendula/issues/new/choose</string>

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

@@ -1,26 +0,0 @@
-package de.jeanlucmakiola.calendula.data.calendar
-
-import com.google.common.truth.Truth.assertThat
-import kotlin.time.Instant
-import org.junit.jupiter.api.Test
-
-class TimeBridgeTest {
-
-    @Test
-    fun `epoch millis round-trips through Instant`() {
-        val original = 1_717_840_800_000L // 2024-06-08T10:00:00Z
-        val instant = original.toKotlinInstantFromEpochMillis()
-        assertThat(instant.toEpochMillis()).isEqualTo(original)
-    }
-
-    @Test
-    fun `zero millis maps to Instant epoch`() {
-        assertThat(0L.toKotlinInstantFromEpochMillis()).isEqualTo(Instant.fromEpochMilliseconds(0L))
-    }
-
-    @Test
-    fun `negative epoch millis is supported`() {
-        val original = -1_000_000L
-        assertThat(original.toKotlinInstantFromEpochMillis().toEpochMillis()).isEqualTo(original)
-    }
-}

app/src/test/java/de/jeanlucmakiola/calendula/data/crash/CrashReportBuilderTest.kt

@@ -1,8 +1,17 @@
 package de.jeanlucmakiola.calendula.data.crash
 
 import com.google.common.truth.Truth.assertThat
+import de.jeanlucmakiola.floret.crash.CrashContext
+import de.jeanlucmakiola.floret.crash.buildCrashReport
 import org.junit.jupiter.api.Test
 
+/**
+ * Guards the privacy contract of the report Calendula ships: the report builder
+ * itself now lives in floret-kit's core-crash, but the allowlist — exactly the
+ * app/Android/device/locale/time header lines plus the stack trace, and nothing
+ * else — is what Calendula relies on, so it stays pinned here with Calendula's
+ * own app label.
+ */
 class CrashReportBuilderTest {
 
     private val context = CrashContext(
@@ -17,7 +26,7 @@ class CrashReportBuilderTest {
 
     @Test
     fun `report carries the allowlisted facts and the stack trace`() {
-        val report = buildCrashReport(context, IllegalStateException("boom"), nowMillis = 0L)
+        val report = buildCrashReport(context, IllegalStateException("boom"), nowMillis = 0L, appLabel = "Calendula")
 
         assertThat(report).startsWith("Calendula crash report")
         assertThat(report).contains("App version: 2.7.0 (20700)")
@@ -33,7 +42,7 @@ class CrashReportBuilderTest {
     @Test
     fun `nested causes are included`() {
         val cause = NullPointerException("inner")
-        val report = buildCrashReport(context, RuntimeException("outer", cause), nowMillis = 0L)
+        val report = buildCrashReport(context, RuntimeException("outer", cause), nowMillis = 0L, appLabel = "Calendula")
 
         assertThat(report).contains("outer")
         assertThat(report).contains("Caused by")
@@ -42,7 +51,7 @@ class CrashReportBuilderTest {
 
     @Test
     fun `report holds only the allowlisted lines before the stack trace`() {
-        val report = buildCrashReport(context, Exception("x"), nowMillis = 0L)
+        val report = buildCrashReport(context, Exception("x"), nowMillis = 0L, appLabel = "Calendula")
         val header = report.substringBefore("Stack trace:").trim().lines()
 
         // No identifiers, accounts, or extra fields ever creep into the header:

app/src/test/java/de/jeanlucmakiola/calendula/data/prefs/SettingsPrefsTest.kt

@@ -5,6 +5,8 @@ import androidx.datastore.preferences.core.PreferenceDataStoreFactory
 import androidx.datastore.preferences.core.Preferences
 import com.google.common.truth.Truth.assertThat
 import de.jeanlucmakiola.calendula.domain.EventFormField
+import de.jeanlucmakiola.calendula.ui.agenda.AgendaRange
+import de.jeanlucmakiola.floret.reminders.ReminderOverride
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.test.runTest
 import kotlinx.datetime.DayOfWeek
@@ -25,7 +27,7 @@ class SettingsPrefsTest {
         val prefs = SettingsPrefs(newDataStore(tempDir))
         assertThat(prefs.themeMode.first()).isEqualTo(ThemeMode.SYSTEM)
         assertThat(prefs.dynamicColor.first()).isTrue()
-        assertThat(prefs.weekStart.first()).isEqualTo(WeekStartPref.AUTO)
+        assertThat(prefs.weekStart.first()).isEqualTo(WeekStartPref.Auto)
     }
 
     @Test
@@ -43,10 +45,62 @@ class SettingsPrefsTest {
     }
 
     @Test
-    fun `week start round-trips`(@TempDir tempDir: Path) = runTest {
+    fun `week start round-trips any day`(@TempDir tempDir: Path) = runTest {
         val prefs = SettingsPrefs(newDataStore(tempDir))
-        prefs.setWeekStart(WeekStartPref.SUNDAY)
+        prefs.setWeekStart(WeekStartPref.Day(DayOfWeek.SATURDAY))
-        assertThat(prefs.weekStart.first()).isEqualTo(WeekStartPref.SUNDAY)
+        assertThat(prefs.weekStart.first()).isEqualTo(WeekStartPref.Day(DayOfWeek.SATURDAY))
+    }
+
+    @Test
+    fun `legacy MONDAY week-start value migrates to Day`(@TempDir tempDir: Path) = runTest {
+        val store = newDataStore(tempDir)
+        val prefs = SettingsPrefs(store)
+        store.updateData { p ->
+            val m = p.toMutablePreferences()
+            m[SettingsPrefs.WEEK_START_KEY] = "MONDAY"
+            m
+        }
+        assertThat(prefs.weekStart.first()).isEqualTo(WeekStartPref.Day(DayOfWeek.MONDAY))
+    }
+
+    @Test
+    fun `garbage week-start value falls back to Auto`(@TempDir tempDir: Path) = runTest {
+        val store = newDataStore(tempDir)
+        val prefs = SettingsPrefs(store)
+        store.updateData { p ->
+            val m = p.toMutablePreferences()
+            m[SettingsPrefs.WEEK_START_KEY] = "FUNDAY"
+            m
+        }
+        assertThat(prefs.weekStart.first()).isEqualTo(WeekStartPref.Auto)
+    }
+
+    @Test
+    fun `time format defaults to auto and round-trips`(@TempDir tempDir: Path) = runTest {
+        val prefs = SettingsPrefs(newDataStore(tempDir))
+        assertThat(prefs.timeFormat.first()).isEqualTo(TimeFormatPref.AUTO)
+        prefs.setTimeFormat(TimeFormatPref.TWELVE_HOUR)
+        assertThat(prefs.timeFormat.first()).isEqualTo(TimeFormatPref.TWELVE_HOUR)
+    }
+
+    @Test
+    fun `hour lines default off and round-trips`(@TempDir tempDir: Path) = runTest {
+        val prefs = SettingsPrefs(newDataStore(tempDir))
+        assertThat(prefs.showHourLines.first()).isFalse()
+        prefs.setShowHourLines(true)
+        assertThat(prefs.showHourLines.first()).isTrue()
+    }
+
+    @Test
+    fun `agenda ranges default to month and round-trip independently`(@TempDir tempDir: Path) = runTest {
+        val prefs = SettingsPrefs(newDataStore(tempDir))
+        assertThat(prefs.agendaScreenRange.first()).isEqualTo(AgendaRange.Month)
+        assertThat(prefs.agendaWidgetRange.first()).isEqualTo(AgendaRange.Month)
+
+        prefs.setAgendaScreenRange(AgendaRange.Custom(14))
+        prefs.setAgendaWidgetRange(AgendaRange.Week)
+        assertThat(prefs.agendaScreenRange.first()).isEqualTo(AgendaRange.Custom(14))
+        assertThat(prefs.agendaWidgetRange.first()).isEqualTo(AgendaRange.Week)
     }
 
     @Test
@@ -153,14 +207,14 @@ class SettingsPrefsTest {
         val prefs = SettingsPrefs(newDataStore(tempDir))
         assertThat(prefs.perCalendarReminderOverride.first()).isEmpty()
 
-        prefs.setCalendarReminderOverride(7L, CalendarReminderOverride.Minutes(15))
+        prefs.setCalendarReminderOverride(7L, ReminderOverride.Minutes(15))
-        prefs.setCalendarReminderOverride(9L, CalendarReminderOverride.None)
+        prefs.setCalendarReminderOverride(9L, ReminderOverride.None)
         prefs.perCalendarReminderOverride.first().let { map ->
             assertThat(map).containsExactly(7L, 15, 9L, null)
         }
 
         // Inherit drops the override entirely (absent != null value).
-        prefs.setCalendarReminderOverride(9L, CalendarReminderOverride.Inherit)
+        prefs.setCalendarReminderOverride(9L, ReminderOverride.Inherit)
         prefs.perCalendarReminderOverride.first().let { map ->
             assertThat(map).containsExactly(7L, 15)
             assertThat(map.containsKey(9L)).isFalse()
@@ -180,12 +234,12 @@ class SettingsPrefsTest {
     @Test
     fun `per-calendar all-day override round-trips independently of the timed one`(@TempDir tempDir: Path) = runTest {
         val prefs = SettingsPrefs(newDataStore(tempDir))
-        prefs.setCalendarReminderOverride(7L, CalendarReminderOverride.Minutes(15))
+        prefs.setCalendarReminderOverride(7L, ReminderOverride.Minutes(15))
-        prefs.setCalendarAllDayReminderOverride(7L, CalendarReminderOverride.Minutes(1_440))
+        prefs.setCalendarAllDayReminderOverride(7L, ReminderOverride.Minutes(1_440))
         assertThat(prefs.perCalendarReminderOverride.first()).containsExactly(7L, 15)
         assertThat(prefs.perCalendarAllDayReminderOverride.first()).containsExactly(7L, 1_440)
         // Clearing the all-day override leaves the timed one untouched.
-        prefs.setCalendarAllDayReminderOverride(7L, CalendarReminderOverride.Inherit)
+        prefs.setCalendarAllDayReminderOverride(7L, ReminderOverride.Inherit)
         assertThat(prefs.perCalendarAllDayReminderOverride.first()).isEmpty()
         assertThat(prefs.perCalendarReminderOverride.first()).containsExactly(7L, 15)
     }
@@ -252,13 +306,15 @@ class SettingsPrefsTest {
 
     @Test
     fun `explicit week-start prefs resolve regardless of locale`() {
-        assertThat(WeekStartPref.MONDAY.resolveFirstDay(Locale.US)).isEqualTo(DayOfWeek.MONDAY)
+        assertThat(WeekStartPref.Day(DayOfWeek.MONDAY).resolveFirstDay(Locale.US))
-        assertThat(WeekStartPref.SUNDAY.resolveFirstDay(Locale.GERMANY)).isEqualTo(DayOfWeek.SUNDAY)
+            .isEqualTo(DayOfWeek.MONDAY)
+        assertThat(WeekStartPref.Day(DayOfWeek.SATURDAY).resolveFirstDay(Locale.GERMANY))
+            .isEqualTo(DayOfWeek.SATURDAY)
     }
 
     @Test
     fun `auto week start follows the locale convention`() {
-        assertThat(WeekStartPref.AUTO.resolveFirstDay(Locale.GERMANY)).isEqualTo(DayOfWeek.MONDAY)
+        assertThat(WeekStartPref.Auto.resolveFirstDay(Locale.GERMANY)).isEqualTo(DayOfWeek.MONDAY)
-        assertThat(WeekStartPref.AUTO.resolveFirstDay(Locale.US)).isEqualTo(DayOfWeek.SUNDAY)
+        assertThat(WeekStartPref.Auto.resolveFirstDay(Locale.US)).isEqualTo(DayOfWeek.SUNDAY)
     }
 }

app/src/test/java/de/jeanlucmakiola/calendula/data/reminders/ReminderTimeTextTest.kt

@@ -26,10 +26,24 @@ class ReminderTimeTextTest {
             isAllDay = false,
             zone = berlin,
             locale = Locale.GERMANY,
+            is24Hour = true,
         )
         assertThat(text).isEqualTo("09:30 – 10:00")
     }
 
+    @Test
+    fun `12-hour preference renders an am-pm time range`() {
+        val text = reminderTimeText(
+            beginMillis = millisAt(LocalDateTime.of(2026, 6, 11, 14, 0), berlin),
+            endMillis = millisAt(LocalDateTime.of(2026, 6, 11, 15, 0), berlin),
+            isAllDay = false,
+            zone = berlin,
+            locale = Locale.US,
+            is24Hour = false,
+        )
+        assertThat(text).isEqualTo("2:00 PM – 3:00 PM")
+    }
+
     @Test
     fun `timed event crossing midnight includes both dates`() {
         val text = reminderTimeText(
@@ -38,6 +52,7 @@ class ReminderTimeTextTest {
             isAllDay = false,
             zone = berlin,
             locale = Locale.GERMANY,
+            is24Hour = true,
         )
         assertThat(text).contains("11.06.2026")
         assertThat(text).contains("12.06.2026")
@@ -54,6 +69,7 @@ class ReminderTimeTextTest {
             // 02:00 in Berlin — naive local reading would shift the day.
             zone = berlin,
             locale = Locale.GERMANY,
+            is24Hour = true,
         )
         assertThat(text).isEqualTo("11.06.2026")
     }
@@ -66,6 +82,7 @@ class ReminderTimeTextTest {
             isAllDay = true,
             zone = berlin,
             locale = Locale.GERMANY,
+            is24Hour = true,
         )
         assertThat(text).isEqualTo("11.06.2026 – 12.06.2026")
     }
@@ -79,6 +96,7 @@ class ReminderTimeTextTest {
             isAllDay = true,
             zone = berlin,
             locale = Locale.GERMANY,
+            is24Hour = true,
         )
         assertThat(text).isEqualTo("11.06.2026")
     }

app/src/test/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaRangeTest.kt

@@ -0,0 +1,83 @@
+package de.jeanlucmakiola.calendula.ui.agenda
+
+import com.google.common.truth.Truth.assertThat
+import kotlinx.datetime.DayOfWeek
+import kotlinx.datetime.LocalDate
+import org.junit.jupiter.api.Test
+
+class AgendaRangeTest {
+
+    // A reference anchor: 2026-06-17 is a Wednesday.
+    private val wednesday = LocalDate(2026, 6, 17)
+
+    @Test
+    fun `rolling ranges have fixed 1, 7, 30 day counts regardless of anchor`() {
+        assertThat(AgendaRange.Day.dayCount(wednesday, DayOfWeek.MONDAY)).isEqualTo(1)
+        assertThat(AgendaRange.Week.dayCount(wednesday, DayOfWeek.MONDAY)).isEqualTo(7)
+        assertThat(AgendaRange.Month.dayCount(wednesday, DayOfWeek.MONDAY)).isEqualTo(30)
+    }
+
+    @Test
+    fun `this week runs through the day before the week repeats`() {
+        // Mon-start week: Wed → Wed,Thu,Fri,Sat,Sun = 5 days (everything before next Monday).
+        assertThat(AgendaRange.ThisWeek.dayCount(wednesday, DayOfWeek.MONDAY)).isEqualTo(5)
+        // On the first day of the week the whole 7 days remain.
+        val monday = LocalDate(2026, 6, 15)
+        assertThat(AgendaRange.ThisWeek.dayCount(monday, DayOfWeek.MONDAY)).isEqualTo(7)
+        // A Sunday-start week shifts the boundary: Wed → 4 days left (through Saturday).
+        assertThat(AgendaRange.ThisWeek.dayCount(wednesday, DayOfWeek.SUNDAY)).isEqualTo(4)
+    }
+
+    @Test
+    fun `this month runs through the last day of the month`() {
+        // June has 30 days: the 17th leaves 14 days (17..30 inclusive).
+        assertThat(AgendaRange.ThisMonth.dayCount(wednesday, DayOfWeek.MONDAY)).isEqualTo(14)
+        // February 2026 (non-leap) has 28 days.
+        assertThat(AgendaRange.ThisMonth.dayCount(LocalDate(2026, 2, 20), DayOfWeek.MONDAY))
+            .isEqualTo(9)
+    }
+
+    @Test
+    fun `custom day count is clamped to bounds`() {
+        assertThat(AgendaRange.Custom(45).dayCount(wednesday, DayOfWeek.MONDAY)).isEqualTo(45)
+        assertThat(AgendaRange.Custom(0).dayCount(wednesday, DayOfWeek.MONDAY))
+            .isEqualTo(AgendaRange.MIN_CUSTOM_DAYS)
+        assertThat(AgendaRange.Custom(9_999).dayCount(wednesday, DayOfWeek.MONDAY))
+            .isEqualTo(AgendaRange.MAX_CUSTOM_DAYS)
+    }
+
+    @Test
+    fun `fixed ranges round-trip through storage`() {
+        listOf(
+            AgendaRange.Day,
+            AgendaRange.Week,
+            AgendaRange.Month,
+            AgendaRange.ThisWeek,
+            AgendaRange.ThisMonth,
+        ).forEach { range ->
+            assertThat(parseAgendaRange(range.storageValue(), default = AgendaRange.Day))
+                .isEqualTo(range)
+        }
+    }
+
+    @Test
+    fun `custom range round-trips through storage`() {
+        val range = AgendaRange.Custom(14)
+        assertThat(range.storageValue()).isEqualTo("CUSTOM:14")
+        assertThat(parseAgendaRange("CUSTOM:14", default = AgendaRange.Day))
+            .isEqualTo(AgendaRange.Custom(14))
+    }
+
+    @Test
+    fun `garbage and null fall back to the default`() {
+        assertThat(parseAgendaRange(null, default = AgendaRange.Month)).isEqualTo(AgendaRange.Month)
+        assertThat(parseAgendaRange("YEAR", default = AgendaRange.Week)).isEqualTo(AgendaRange.Week)
+        assertThat(parseAgendaRange("CUSTOM:abc", default = AgendaRange.Day)).isEqualTo(AgendaRange.Day)
+    }
+
+    @Test
+    fun `out-of-range custom value clamps on parse`() {
+        assertThat(parseAgendaRange("CUSTOM:9999", default = AgendaRange.Day))
+            .isEqualTo(AgendaRange.Custom(AgendaRange.MAX_CUSTOM_DAYS))
+    }
+}

app/src/test/java/de/jeanlucmakiola/calendula/ui/common/TimeFormatTest.kt

@@ -0,0 +1,37 @@
+package de.jeanlucmakiola.calendula.ui.common
+
+import com.google.common.truth.Truth.assertThat
+import org.junit.jupiter.api.Test
+import java.util.Locale
+
+class TimeFormatTest {
+
+    @Test
+    fun `24-hour format is zero-padded HH mm`() {
+        assertThat(formatTimeOfDay(9, 5, is24Hour = true, Locale.US)).isEqualTo("09:05")
+        assertThat(formatTimeOfDay(14, 0, is24Hour = true, Locale.US)).isEqualTo("14:00")
+        assertThat(formatTimeOfDay(0, 0, is24Hour = true, Locale.US)).isEqualTo("00:00")
+    }
+
+    @Test
+    fun `12-hour format adds a localised am-pm marker`() {
+        assertThat(formatTimeOfDay(14, 0, is24Hour = false, Locale.US)).isEqualTo("2:00 PM")
+        assertThat(formatTimeOfDay(0, 30, is24Hour = false, Locale.US)).isEqualTo("12:30 AM")
+        assertThat(formatTimeOfDay(12, 0, is24Hour = false, Locale.US)).isEqualTo("12:00 PM")
+    }
+
+    @Test
+    fun `minute-of-day end-of-day renders 24 00 in 24h and midnight in 12h`() {
+        assertThat(formatMinuteOfDay(1_440, is24Hour = true, Locale.US)).isEqualTo("24:00")
+        assertThat(formatMinuteOfDay(1_440, is24Hour = false, Locale.US)).isEqualTo("12:00 AM")
+        assertThat(formatMinuteOfDay(13 * 60 + 15, is24Hour = true, Locale.US)).isEqualTo("13:15")
+    }
+
+    @Test
+    fun `hour label is zero-padded in 24h and compact am-pm in 12h`() {
+        assertThat(formatHourLabel(13, is24Hour = true, Locale.US)).isEqualTo("13")
+        assertThat(formatHourLabel(13, is24Hour = false, Locale.US)).isEqualTo("1 PM")
+        assertThat(formatHourLabel(1, is24Hour = false, Locale.US)).isEqualTo("1 AM")
+        assertThat(formatHourLabel(0, is24Hour = false, Locale.US)).isEqualTo("12 AM")
+    }
+}

docs/fdroid-official/de.jeanlucmakiola.calendula.yml

@@ -43,11 +43,21 @@ Builds:
     versionCode: 20705
     commit: v2.7.5
     subdir: app
+    submodules: true
     gradle:
       - yes
     # No NDK / no flavors. The release buildType applies a signingConfig only
     # when key.properties exists; on the buildserver it does not, so this
     # produces the unsigned APK F-Droid compares against our binary.
+    #
+    # submodules: true — REQUIRED from v2.11.0 onward, where the build pulls
+    # shared code from the `floret-kit` git submodule via a Gradle composite
+    # build (`includeBuild("floret-kit")`). Without it F-Droid checks out an
+    # empty floret-kit/ and the from-source build fails, stalling publishing.
+    # Inert for v2.7.5 (no submodule yet); kept here so AutoUpdateMode copies it
+    # onto every auto-generated future build entry. The kit is plain-Kotlin and
+    # carries no foojay toolchain resolver, so it clears the same reproducibility
+    # bar (enforced by scripts/check_reproducible_release.sh).
 
 # SHA-256 of our app signing certificate (public; embedded in every published
 # APK). Locks F-Droid to publish only binaries signed with our key.

fastlane/metadata/android/en-US/changelogs/21100.txt

@@ -0,0 +1,50 @@
+### Added
+- Start the week on any day. The **Week starts on** setting (Settings →
+  Appearance) now offers every weekday — not just Monday or Sunday — alongside
+  the automatic, locale-based default. Thanks to @zmaherdev for the suggestion
+  ([#3]).
+- Choose a 12- or 24-hour clock. A new **Time format** setting (Settings →
+  Appearance) lets you force a 12-hour (2:00 PM) or 24-hour (14:00) clock, or
+  follow the system setting automatically. It applies everywhere times appear —
+  the week and day timelines, agenda, event details, search and reminders — so
+  the format is now consistent across the whole app. Thanks to @zmaherdev for
+  the suggestion ([#6]).
+- Optional hour lines in the timeline. A new **Hour lines** switch (Settings →
+  Appearance) draws a faint separator at each hour in the week and day views,
+  making it easier to see when events start and end. Off by default. Thanks to
+  @zmaherdev for the suggestion ([#5]).
+- Limit how far ahead the agenda looks, and switch it on the fly. New **Agenda
+  range** and **Agenda widget range** settings (Settings → Appearance) let the
+  agenda screen and its home-screen widget each show just today, the rest of this
+  week, the rest of this month, a rolling 7 or 30 days, or a custom number of
+  days — "This week" follows your week-start. The agenda also gains a bar at the
+  top naming the exact dates in view, with a button to switch the range just for
+  the current session (it resets when you reopen the app); the bar can be turned
+  off. Thanks to @zmaherdev for the suggestion ([#4]).
+- Automatic backup of local calendars. A new **Automatic backup** option
+  (Settings → Calendars → Backup) periodically exports your local calendars to an
+  `.ics` file in a folder you choose, on an interval you set (from 30 minutes up).
+  Useful for file-based syncing such as Syncthing, or simply as a safety net — it
+  is a one-way export and never touches your synced accounts. Thanks to @shield
+  for the discussion that inspired it ([#7], [#8]).
+- Field icons in the event-form settings. Each optional-field toggle (Settings →
+  Event form) now shows the same icon the field uses in the new-event form, so
+  the list is easier to scan.
+- Help translate Calendula. A **Help translate** link at the top of **Settings →
+  App language** opens the project's Weblate, where you can add or improve a
+  language in your browser — no coding needed. Contributions in any language are
+  welcome.
+
+### Changed
+- Tidied **Settings → Appearance** into clearer groups (theme & colour, calendar,
+  agenda), and the agenda's empty state now reads "You're all caught up".
+- Reworked **Settings → Calendars**. Local and synced calendars are now grouped
+  into collapsible, source-branded cards — each account shows its app's icon —
+  with a per-account menu to enable or disable all of its calendars at once or
+  open the account in its source app.
+- Reorganised **Settings → Notifications**: reliable-delivery and snooze settings
+  moved up with the other global reminder options, and the per-calendar reminder
+  overrides now fold into a single expandable section.
+- Moved **Add Quick Settings tile** out of the event-form section to its own
+  top-level entry in Settings.
+

gradle/libs.versions.toml

@@ -26,10 +26,14 @@ lifecycleCompose = "2.10.0"
 androidxTestRules = "1.7.0"
 # Glance: 1.1.1 is the latest stable (1.2.0 is still rc, 1.3.0 alpha).
 glance = "1.1.1"
+work = "2.10.1"
+documentfile = "1.0.1"
 
 [libraries]
 # AndroidX core
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
+androidx-work-runtime-ktx = { group = "androidx.work", name = "work-runtime-ktx", version.ref = "work" }
+androidx-documentfile = { group = "androidx.documentfile", name = "documentfile", version.ref = "documentfile" }
 androidx-appcompat = { group = "androidx.appcompat", name = "appcompat", version.ref = "appcompat" }
 androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntime" }
 androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }

scripts/check_reproducible_release.sh

@@ -34,8 +34,15 @@ else
 fi
 
 # 2. The foojay toolchain resolver must not be present in any Gradle script.
+#    This includes the floret-kit submodule: it's an included build (composite
+#    build via `includeBuild`), so F-Droid evaluates its Gradle scripts too when
+#    building from source — the same offline-scanner bar applies to it.
 gradle_files=("$SETTINGS" "$APP")
 [ -f build.gradle.kts ] && gradle_files+=(build.gradle.kts)
+if [ -d floret-kit ]; then
+  while IFS= read -r f; do gradle_files+=("$f"); done \
+    < <(find floret-kit -name '*.gradle.kts' -not -path '*/build/*')
+fi
 if grep -qi 'foojay' "${gradle_files[@]}"; then
   echo "ERROR: foojay toolchain resolver found in: $(grep -li foojay "${gradle_files[@]}" | tr '\n' ' ')" >&2
   echo "       F-Droid's source scanner rejects org.gradle.toolchains.foojay-resolver" >&2

settings.gradle.kts

@@ -22,3 +22,4 @@ dependencyResolutionManagement {
 
 rootProject.name = "Calendula"
 include(":app")
+includeBuild("floret-kit")