docs(04): create phase plan

.planning/ROADMAP.md

@@ -79,7 +79,11 @@ Plans:
   2. User can enable or disable notifications from the Settings tab, and the change takes effect immediately
   3. Notifications are correctly rescheduled after device reboot (RECEIVE_BOOT_COMPLETED receiver active)
   4. On Android API 33+, the app requests POST_NOTIFICATIONS permission at the appropriate moment and degrades gracefully if denied
-**Plans**: TBD
+**Plans**: 3 plans
+Plans:
+- [ ] 04-01-PLAN.md — Infrastructure: packages, Android config, NotificationService, NotificationSettingsNotifier, DAO queries, timezone init, tests
+- [ ] 04-02-PLAN.md — Settings UI: Benachrichtigungen section with toggle, time picker, permission flow, scheduling wiring, tests
+- [ ] 04-03-PLAN.md — Verification gate: dart analyze + full test suite + requirement confirmation
 
 ## Progress
 
@@ -93,4 +97,4 @@ Note: Phase 4 depends on Phase 2 (needs scheduling data) but can be developed in
 | 1. Foundation | 2/2 | Complete    | 2026-03-15 |
 | 2. Rooms and Tasks | 5/5 | Complete    | 2026-03-15 |
 | 3. Daily Plan and Cleanliness | 3/3 | Complete   | 2026-03-16 |
-| 4. Notifications | 0/TBD | Not started | - |
+| 4. Notifications | 0/3 | In progress | - |

.planning/phases/04-notifications/04-01-PLAN.md

@@ -0,0 +1,339 @@
+---
+phase: 04-notifications
+plan: 01
+type: execute
+wave: 1
+depends_on: []
+files_modified:
+  - pubspec.yaml
+  - android/app/build.gradle.kts
+  - android/app/src/main/AndroidManifest.xml
+  - lib/main.dart
+  - lib/core/notifications/notification_service.dart
+  - lib/core/notifications/notification_settings_notifier.dart
+  - lib/core/notifications/notification_settings_notifier.g.dart
+  - lib/features/home/data/daily_plan_dao.dart
+  - lib/features/home/data/daily_plan_dao.g.dart
+  - lib/l10n/app_de.arb
+  - test/core/notifications/notification_service_test.dart
+  - test/core/notifications/notification_settings_notifier_test.dart
+autonomous: true
+requirements:
+  - NOTF-01
+  - NOTF-02
+
+must_haves:
+  truths:
+    - "NotificationService can schedule a daily notification at a given TimeOfDay"
+    - "NotificationService can cancel all scheduled notifications"
+    - "NotificationService can request POST_NOTIFICATIONS permission"
+    - "NotificationSettingsNotifier persists enabled boolean and TimeOfDay to SharedPreferences"
+    - "NotificationSettingsNotifier loads persisted values on build"
+    - "DailyPlanDao can return a one-shot count of overdue + today tasks"
+    - "Timezone is initialized before any notification scheduling"
+    - "Android build compiles with core library desugaring enabled"
+    - "AndroidManifest has POST_NOTIFICATIONS permission, RECEIVE_BOOT_COMPLETED permission, and boot receiver"
+  artifacts:
+    - path: "lib/core/notifications/notification_service.dart"
+      provides: "Singleton wrapper around FlutterLocalNotificationsPlugin"
+      exports: ["NotificationService"]
+    - path: "lib/core/notifications/notification_settings_notifier.dart"
+      provides: "Riverpod notifier for notification enabled + time"
+      exports: ["NotificationSettings", "NotificationSettingsNotifier"]
+    - path: "test/core/notifications/notification_service_test.dart"
+      provides: "Unit tests for scheduling, cancel, permission"
+    - path: "test/core/notifications/notification_settings_notifier_test.dart"
+      provides: "Unit tests for persistence and state management"
+  key_links:
+    - from: "lib/core/notifications/notification_service.dart"
+      to: "flutter_local_notifications"
+      via: "FlutterLocalNotificationsPlugin"
+      pattern: "FlutterLocalNotificationsPlugin"
+    - from: "lib/core/notifications/notification_settings_notifier.dart"
+      to: "shared_preferences"
+      via: "SharedPreferences persistence"
+      pattern: "SharedPreferences\\.getInstance"
+    - from: "lib/main.dart"
+      to: "lib/core/notifications/notification_service.dart"
+      via: "timezone init + service initialize"
+      pattern: "NotificationService.*initialize"
+---
+
+<objective>
+Install notification packages, configure Android build system, create the NotificationService singleton and NotificationSettingsNotifier provider, add one-shot DAO query for task counts, initialize timezone in main.dart, add ARB strings, and write unit tests.
+
+Purpose: Establish the complete notification infrastructure so Plan 02 can wire it into the Settings UI.
+Output: Working notification service and settings notifier with full test coverage. Android build configuration complete.
+</objective>
+
+<execution_context>
+@/home/jlmak/.claude/get-shit-done/workflows/execute-plan.md
+@/home/jlmak/.claude/get-shit-done/templates/summary.md
+</execution_context>
+
+<context>
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+@.planning/phases/04-notifications/04-CONTEXT.md
+@.planning/phases/04-notifications/04-RESEARCH.md
+
+<interfaces>
+<!-- Key types and contracts the executor needs. Extracted from codebase. -->
+
+From lib/core/theme/theme_provider.dart (pattern to follow for notifier):
+```dart
+@riverpod
+class ThemeNotifier extends _$ThemeNotifier {
+  @override
+  ThemeMode build() {
+    _loadPersistedThemeMode();
+    return ThemeMode.system; // sync default, then async load overrides
+  }
+  Future<void> setThemeMode(ThemeMode mode) async { ... }
+}
+```
+
+From lib/features/home/data/daily_plan_dao.dart (DAO to extend):
+```dart
+@DriftAccessor(tables: [Tasks, Rooms, TaskCompletions])
+class DailyPlanDao extends DatabaseAccessor<AppDatabase> with _$DailyPlanDaoMixin {
+  DailyPlanDao(super.attachedDatabase);
+  Stream<List<TaskWithRoom>> watchAllTasksWithRoomName() { ... }
+  Stream<int> watchCompletionsToday({DateTime? today}) { ... }
+}
+```
+
+From lib/main.dart (entry point to modify):
+```dart
+void main() {
+  WidgetsFlutterBinding.ensureInitialized();
+  runApp(const ProviderScope(child: App()));
+}
+```
+
+From lib/core/router/router.dart (top-level GoRouter for notification tap):
+```dart
+final router = GoRouter(
+  initialLocation: '/',
+  routes: [ StatefulShellRoute.indexedStack(...) ],
+);
+```
+
+From lib/l10n/app_de.arb (localization file, 92 existing keys):
+Last key: "dailyPlanNoTasks": "Noch keine Aufgaben angelegt"
+
+From android/app/build.gradle.kts:
+```kotlin
+android {
+    compileSdk = flutter.compileSdkVersion
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+}
+```
+
+From android/app/src/main/AndroidManifest.xml:
+No notification-related entries exist yet. Only standard Flutter activity + meta-data.
+</interfaces>
+</context>
+
+<tasks>
+
+<task type="auto">
+  <name>Task 1: Android config, packages, NotificationService, timezone init, DAO query, ARB strings</name>
+  <files>
+    pubspec.yaml,
+    android/app/build.gradle.kts,
+    android/app/src/main/AndroidManifest.xml,
+    lib/main.dart,
+    lib/core/notifications/notification_service.dart,
+    lib/features/home/data/daily_plan_dao.dart,
+    lib/features/home/data/daily_plan_dao.g.dart,
+    lib/l10n/app_de.arb
+  </files>
+  <action>
+    1. **Add packages** to pubspec.yaml dependencies:
+       - `flutter_local_notifications: ^21.0.0`
+       - `timezone: ^0.9.4`
+       - `flutter_timezone: ^1.0.8`
+       Run `flutter pub get`.
+
+    2. **Configure Android build** in `android/app/build.gradle.kts`:
+       - Set `compileSdk = 35` (explicit, replacing `flutter.compileSdkVersion`)
+       - Add `isCoreLibraryDesugaringEnabled = true` inside `compileOptions`
+       - Add `coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.1.4")` in `dependencies` block
+
+    3. **Configure AndroidManifest.xml** — add inside `<manifest>` (outside `<application>`):
+       - `<uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>`
+       - `<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>`
+       Add inside `<application>`:
+       - `ScheduledNotificationReceiver` with `android:exported="false"`
+       - `ScheduledNotificationBootReceiver` with `android:exported="true"` and intent-filter for BOOT_COMPLETED, MY_PACKAGE_REPLACED, QUICKBOOT_POWERON, HTC QUICKBOOT_POWERON
+       Use the exact XML from RESEARCH.md Pattern section.
+
+    4. **Create NotificationService** at `lib/core/notifications/notification_service.dart`:
+       - Singleton pattern (factory constructor + static `_instance`)
+       - `final _plugin = FlutterLocalNotificationsPlugin();`
+       - `Future<void> initialize()`: AndroidInitializationSettings with `@mipmap/ic_launcher`, call `_plugin.initialize(settings, onDidReceiveNotificationResponse: _onTap)`
+       - `Future<bool> requestPermission()`: resolve Android implementation, call `requestNotificationsPermission()`, return `granted ?? false`
+       - `Future<void> scheduleDailyNotification({required TimeOfDay time, required String title, required String body})`:
+         - Call `_plugin.cancelAll()` first
+         - Compute `_nextInstanceOf(time)` as TZDateTime
+         - AndroidNotificationDetails: channelId `'daily_summary'`, channelName `'Tagliche Zusammenfassung'`, channelDescription `'Tagliche Aufgaben-Erinnerung'`, importance default, priority default
+         - Call `_plugin.zonedSchedule(0, title: title, body: body, scheduledDate: scheduledDate, details, androidScheduleMode: AndroidScheduleMode.inexactAllowWhileIdle, matchDateTimeComponents: DateTimeComponents.time)`
+       - `Future<void> cancelAll()`: delegates to `_plugin.cancelAll()`
+       - `tz.TZDateTime _nextInstanceOf(TimeOfDay time)`: compute next occurrence (today if in future, tomorrow otherwise)
+       - `static void _onTap(NotificationResponse response)`: no-op for now (Plan 02 wires navigation)
+
+    5. **Add one-shot DAO query** to `lib/features/home/data/daily_plan_dao.dart`:
+       ```dart
+       /// One-shot count of overdue + today tasks (for notification body).
+       Future<int> getOverdueAndTodayTaskCount({DateTime? today}) async {
+         final now = today ?? DateTime.now();
+         final endOfToday = DateTime(now.year, now.month, now.day + 1);
+         final result = await (selectOnly(tasks)
+           ..addColumns([tasks.id.count()])
+           ..where(tasks.nextDueDate.isSmallerThanValue(endOfToday)))
+         .getSingle();
+         return result.read(tasks.id.count()) ?? 0;
+       }
+
+       /// One-shot count of overdue tasks only (for notification body split).
+       Future<int> getOverdueTaskCount({DateTime? today}) async {
+         final now = today ?? DateTime.now();
+         final startOfToday = DateTime(now.year, now.month, now.day);
+         final result = await (selectOnly(tasks)
+           ..addColumns([tasks.id.count()])
+           ..where(tasks.nextDueDate.isSmallerThanValue(startOfToday)))
+         .getSingle();
+         return result.read(tasks.id.count()) ?? 0;
+       }
+       ```
+       Run `dart run build_runner build --delete-conflicting-outputs` to regenerate DAO.
+
+    6. **Initialize timezone in main.dart** — before `NotificationService().initialize()`:
+       ```dart
+       import 'package:timezone/data/latest_all.dart' as tz;
+       import 'package:timezone/timezone.dart' as tz;
+       import 'package:flutter_timezone/flutter_timezone.dart';
+
+       void main() async {
+         WidgetsFlutterBinding.ensureInitialized();
+         tz.initializeTimeZones();
+         final timeZoneName = await FlutterTimezone.getLocalTimezone();
+         tz.setLocalLocation(tz.getLocation(timeZoneName));
+         await NotificationService().initialize();
+         runApp(const ProviderScope(child: App()));
+       }
+       ```
+
+    7. **Add ARB strings** to `lib/l10n/app_de.arb`:
+       - `settingsSectionNotifications`: "Benachrichtigungen"
+       - `notificationsEnabledLabel`: "Tägliche Erinnerung"
+       - `notificationsTimeLabel`: "Uhrzeit"
+       - `notificationsPermissionDeniedHint`: "Benachrichtigungen sind in den Systemeinstellungen deaktiviert. Tippe hier, um sie zu aktivieren."
+       - `notificationTitle`: "Dein Tagesplan"
+       - `notificationBody`: "{count} Aufgaben fällig" with `@notificationBody` placeholder `count: int`
+       - `notificationBodyWithOverdue`: "{count} Aufgaben fällig ({overdue} überfällig)" with `@notificationBodyWithOverdue` placeholders `count: int, overdue: int`
+
+    8. Run `flutter pub get` and `flutter test` to confirm no regressions (expect 72 existing tests to pass).
+  </action>
+  <verify>
+    <automated>cd /home/jlmak/Projects/jlmak/HouseHoldKeaper && flutter test</automated>
+  </verify>
+  <done>
+    - flutter_local_notifications, timezone, flutter_timezone in pubspec.yaml
+    - build.gradle.kts has compileSdk=35, desugaring enabled, desugar_jdk_libs dependency
+    - AndroidManifest has POST_NOTIFICATIONS, RECEIVE_BOOT_COMPLETED, both receivers
+    - NotificationService exists with initialize, requestPermission, scheduleDailyNotification, cancelAll
+    - DailyPlanDao has getOverdueAndTodayTaskCount and getOverdueTaskCount one-shot queries
+    - main.dart initializes timezone and notification service before runApp
+    - ARB file has 7 new notification-related keys
+    - All 72 existing tests still pass
+  </done>
+</task>
+
+<task type="auto" tdd="true">
+  <name>Task 2: NotificationSettingsNotifier and unit tests</name>
+  <files>
+    lib/core/notifications/notification_settings_notifier.dart,
+    lib/core/notifications/notification_settings_notifier.g.dart,
+    test/core/notifications/notification_settings_notifier_test.dart,
+    test/core/notifications/notification_service_test.dart
+  </files>
+  <behavior>
+    - Test: NotificationSettingsNotifier build() returns default state (enabled=false, time=07:00)
+    - Test: setEnabled(true) updates state.enabled to true and persists to SharedPreferences
+    - Test: setEnabled(false) updates state.enabled to false and persists to SharedPreferences
+    - Test: setTime(TimeOfDay(hour: 9, minute: 30)) updates state.time and persists hour+minute to SharedPreferences
+    - Test: After _load() with existing prefs (enabled=true, hour=8, minute=15), state reflects persisted values
+    - Test: NotificationService._nextInstanceOf returns today if time is in the future
+    - Test: NotificationService._nextInstanceOf returns tomorrow if time has passed
+  </behavior>
+  <action>
+    1. **Create NotificationSettingsNotifier** at `lib/core/notifications/notification_settings_notifier.dart`:
+       - Use `@Riverpod(keepAlive: true)` annotation (NOT plain `@riverpod`) to survive tab switches
+       - `class NotificationSettings { final bool enabled; final TimeOfDay time; const NotificationSettings({required this.enabled, required this.time}); }`
+       - `class NotificationSettingsNotifier extends _$NotificationSettingsNotifier`
+       - `build()` returns `NotificationSettings(enabled: false, time: TimeOfDay(hour: 7, minute: 0))` synchronously, then calls `_load()` which async reads SharedPreferences and updates state
+       - `Future<void> setEnabled(bool enabled)`: update state, persist `notifications_enabled` bool
+       - `Future<void> setTime(TimeOfDay time)`: update state, persist `notifications_hour` int and `notifications_minute` int
+       - Follow exact pattern from ThemeNotifier: sync return default, async load overrides state
+       - Add `part 'notification_settings_notifier.g.dart';`
+
+    2. Run `dart run build_runner build --delete-conflicting-outputs` to generate `.g.dart`.
+
+    3. **Write tests** at `test/core/notifications/notification_settings_notifier_test.dart`:
+       - Use `SharedPreferences.setMockInitialValues({})` for clean state
+       - Use `SharedPreferences.setMockInitialValues({'notifications_enabled': true, 'notifications_hour': 8, 'notifications_minute': 15})` for pre-existing state
+       - Create a `ProviderContainer` with the notifier, verify default state, call `setEnabled`/`setTime`, verify state updates and SharedPreferences values
+
+    4. **Write tests** at `test/core/notifications/notification_service_test.dart`:
+       - Test `_nextInstanceOf` logic by extracting it to a `@visibleForTesting` static method or by testing `scheduleDailyNotification` with a mock plugin
+       - Since `FlutterLocalNotificationsPlugin` dispatches to native and cannot be truly unit-tested, focus tests on:
+         a. `_nextInstanceOf` returns correct TZDateTime (make it a package-private or `@visibleForTesting` method)
+         b. Verify the service can be instantiated (singleton pattern)
+       - Initialize timezone in test setUp: `tz.initializeTimeZones(); tz.setLocalLocation(tz.getLocation('Europe/Berlin'));`
+
+    5. Run `flutter test test/core/notifications/` to confirm new tests pass.
+    6. Run `flutter test` to confirm all tests pass (72 existing + new).
+  </action>
+  <verify>
+    <automated>cd /home/jlmak/Projects/jlmak/HouseHoldKeaper && flutter test test/core/notifications/</automated>
+  </verify>
+  <done>
+    - NotificationSettingsNotifier with @Riverpod(keepAlive: true) created and generated
+    - NotificationSettings data class with enabled + time fields
+    - SharedPreferences persistence for enabled, hour, minute
+    - Unit tests for default state, setEnabled, setTime, persistence load
+    - Unit tests for _nextInstanceOf timezone logic
+    - All tests pass including existing 72
+  </done>
+</task>
+
+</tasks>
+
+<verification>
+- `flutter test` — all tests pass (72 existing + new notification tests)
+- `dart analyze --fatal-infos` — no warnings or errors
+- `grep -r "flutter_local_notifications" pubspec.yaml` — package present
+- `grep -r "isCoreLibraryDesugaringEnabled" android/app/build.gradle.kts` — desugaring enabled
+- `grep -r "POST_NOTIFICATIONS" android/app/src/main/AndroidManifest.xml` — permission present
+- `grep -r "RECEIVE_BOOT_COMPLETED" android/app/src/main/AndroidManifest.xml` — permission present
+- `grep -r "ScheduledNotificationBootReceiver" android/app/src/main/AndroidManifest.xml` — receiver present
+</verification>
+
+<success_criteria>
+- NotificationService singleton with initialize, requestPermission, scheduleDailyNotification, cancelAll
+- NotificationSettingsNotifier persists enabled + time to SharedPreferences
+- DailyPlanDao has one-shot overdue+today count queries
+- Android build configured for flutter_local_notifications v21
+- Timezone initialized in main.dart
+- All tests pass, dart analyze clean
+</success_criteria>
+
+<output>
+After completion, create `.planning/phases/04-notifications/04-01-SUMMARY.md`
+</output>

.planning/phases/04-notifications/04-02-PLAN.md

@@ -0,0 +1,317 @@
+---
+phase: 04-notifications
+plan: 02
+type: execute
+wave: 2
+depends_on:
+  - 04-01
+files_modified:
+  - lib/features/settings/presentation/settings_screen.dart
+  - lib/core/router/router.dart
+  - lib/core/notifications/notification_service.dart
+  - test/features/settings/settings_screen_test.dart
+autonomous: true
+requirements:
+  - NOTF-01
+  - NOTF-02
+
+must_haves:
+  truths:
+    - "Settings screen shows a Benachrichtigungen section between Darstellung and Uber"
+    - "SwitchListTile toggles notification enabled/disabled"
+    - "When toggle is ON, time picker row appears below with progressive disclosure animation"
+    - "When toggle is OFF, time picker row is hidden"
+    - "Tapping time row opens Material 3 showTimePicker dialog"
+    - "Toggling ON requests POST_NOTIFICATIONS permission on Android 13+"
+    - "If permission denied, toggle reverts to OFF"
+    - "If permanently denied, user is guided to system notification settings"
+    - "When enabled + time set, daily notification is scheduled with correct body from DAO query"
+    - "Skip notification scheduling when task count is 0"
+    - "Notification body shows overdue count only when overdue > 0"
+    - "Tapping notification navigates to Home tab"
+  artifacts:
+    - path: "lib/features/settings/presentation/settings_screen.dart"
+      provides: "Benachrichtigungen section with toggle and time picker"
+      contains: "SwitchListTile"
+    - path: "test/features/settings/settings_screen_test.dart"
+      provides: "Widget tests for notification settings UI"
+  key_links:
+    - from: "lib/features/settings/presentation/settings_screen.dart"
+      to: "lib/core/notifications/notification_settings_notifier.dart"
+      via: "ref.watch(notificationSettingsNotifierProvider)"
+      pattern: "notificationSettingsNotifierProvider"
+    - from: "lib/features/settings/presentation/settings_screen.dart"
+      to: "lib/core/notifications/notification_service.dart"
+      via: "NotificationService().scheduleDailyNotification"
+      pattern: "NotificationService.*schedule"
+    - from: "lib/core/router/router.dart"
+      to: "lib/core/notifications/notification_service.dart"
+      via: "notification tap navigates to /"
+      pattern: "router\\.go\\('/'\\)"
+---
+
+<objective>
+Wire the notification infrastructure into the Settings UI with permission flow, add notification scheduling on toggle/time change, implement notification tap navigation, and write widget tests.
+
+Purpose: Complete the user-facing notification feature — users can enable notifications, pick a time, and receive daily task summaries.
+Output: Fully functional notification settings with permission handling, scheduling, and navigation.
+</objective>
+
+<execution_context>
+@/home/jlmak/.claude/get-shit-done/workflows/execute-plan.md
+@/home/jlmak/.claude/get-shit-done/templates/summary.md
+</execution_context>
+
+<context>
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+@.planning/phases/04-notifications/04-CONTEXT.md
+@.planning/phases/04-notifications/04-RESEARCH.md
+@.planning/phases/04-notifications/04-01-SUMMARY.md
+
+<interfaces>
+<!-- Contracts from Plan 01 that this plan consumes -->
+
+From lib/core/notifications/notification_service.dart (created in Plan 01):
+```dart
+class NotificationService {
+  static final NotificationService _instance = NotificationService._internal();
+  factory NotificationService() => _instance;
+
+  Future<void> initialize() async { ... }
+  Future<bool> requestPermission() async { ... }
+  Future<void> scheduleDailyNotification({
+    required TimeOfDay time,
+    required String title,
+    required String body,
+  }) async { ... }
+  Future<void> cancelAll() async { ... }
+}
+```
+
+From lib/core/notifications/notification_settings_notifier.dart (created in Plan 01):
+```dart
+class NotificationSettings {
+  final bool enabled;
+  final TimeOfDay time;
+  const NotificationSettings({required this.enabled, required this.time});
+}
+
+@Riverpod(keepAlive: true)
+class NotificationSettingsNotifier extends _$NotificationSettingsNotifier {
+  NotificationSettings build() { ... }
+  Future<void> setEnabled(bool enabled) async { ... }
+  Future<void> setTime(TimeOfDay time) async { ... }
+}
+// Generated provider: notificationSettingsNotifierProvider
+```
+
+From lib/features/home/data/daily_plan_dao.dart (extended in Plan 01):
+```dart
+Future<int> getOverdueAndTodayTaskCount({DateTime? today}) async { ... }
+Future<int> getOverdueTaskCount({DateTime? today}) async { ... }
+```
+
+From lib/features/settings/presentation/settings_screen.dart (existing):
+```dart
+class SettingsScreen extends ConsumerWidget {
+  // ListView with: Darstellung section, Divider, Uber section
+}
+```
+
+From lib/core/router/router.dart (existing):
+```dart
+final router = GoRouter(initialLocation: '/', routes: [ ... ]);
+```
+
+From lib/l10n/app_de.arb (notification strings from Plan 01):
+- settingsSectionNotifications, notificationsEnabledLabel, notificationsTimeLabel
+- notificationsPermissionDeniedHint
+- notificationTitle, notificationBody, notificationBodyWithOverdue
+</interfaces>
+</context>
+
+<tasks>
+
+<task type="auto">
+  <name>Task 1: Settings UI with Benachrichtigungen section, permission flow, and notification scheduling</name>
+  <files>
+    lib/features/settings/presentation/settings_screen.dart,
+    lib/core/router/router.dart,
+    lib/core/notifications/notification_service.dart
+  </files>
+  <action>
+    1. **Modify SettingsScreen** (`lib/features/settings/presentation/settings_screen.dart`):
+       - Change from `ConsumerWidget` to `ConsumerStatefulWidget` (needed for async permission/scheduling logic in callbacks)
+       - Add `ref.watch(notificationSettingsNotifierProvider)` to get current `NotificationSettings`
+       - Insert new section BETWEEN the Darstellung Divider and the Uber section header:
+
+       ```
+       const Divider(indent: 16, endIndent: 16, height: 32),
+
+       // Section 2: Notifications (Benachrichtigungen)
+       Padding(
+         padding: const EdgeInsets.fromLTRB(16, 8, 16, 8),
+         child: Text(
+           l10n.settingsSectionNotifications,
+           style: theme.textTheme.titleMedium?.copyWith(
+             color: theme.colorScheme.primary,
+           ),
+         ),
+       ),
+       SwitchListTile(
+         title: Text(l10n.notificationsEnabledLabel),
+         value: notificationSettings.enabled,
+         onChanged: (value) => _onNotificationToggle(value),
+       ),
+       // Progressive disclosure: time picker only when enabled
+       AnimatedSize(
+         duration: const Duration(milliseconds: 200),
+         child: notificationSettings.enabled
+           ? ListTile(
+               title: Text(l10n.notificationsTimeLabel),
+               trailing: Text(notificationSettings.time.format(context)),
+               onTap: () => _onPickTime(),
+             )
+           : const SizedBox.shrink(),
+       ),
+
+       const Divider(indent: 16, endIndent: 16, height: 32),
+
+       // Section 3: About (Uber) — existing code, unchanged
+       ```
+
+    2. **Implement `_onNotificationToggle(bool value)`**:
+       - If `value == true` (enabling):
+         a. Call `NotificationService().requestPermission()` — await result
+         b. If `granted == false`: check if permanently denied. On Android, this means `shouldShowRequestRationale` returns false after denial. Since we don't have `permission_handler`, use a simpler approach: if `requestPermission()` returns false, show a SnackBar with `l10n.notificationsPermissionDeniedHint` and an action that calls `openAppSettings()` (import `flutter_local_notifications` for this, or use `AppSettings.openAppSettings()`). Actually, the simplest approach: if permission denied, show a SnackBar with the hint text. Do NOT change the toggle to ON. Return early.
+         c. If `granted == true`: call `ref.read(notificationSettingsNotifierProvider.notifier).setEnabled(true)`, then schedule notification via `_scheduleNotification()`
+       - If `value == false` (disabling):
+         a. Call `ref.read(notificationSettingsNotifierProvider.notifier).setEnabled(false)`
+         b. Call `NotificationService().cancelAll()`
+
+    3. **Implement `_scheduleNotification()`** helper:
+       - Get the database instance from the Riverpod container: `ref.read(appDatabaseProvider)` (or access DailyPlanDao directly — check how other screens access the database and follow that pattern)
+       - Query `DailyPlanDao(db).getOverdueAndTodayTaskCount()` for total count
+       - Query `DailyPlanDao(db).getOverdueTaskCount()` for overdue count
+       - If total count == 0: call `NotificationService().cancelAll()` and return (skip-on-zero per CONTEXT.md)
+       - Build notification body:
+         - If overdue > 0: use `l10n.notificationBodyWithOverdue(total, overdue)`
+         - If overdue == 0: use `l10n.notificationBody(total)`
+       - Title: `l10n.notificationTitle` (which is "Dein Tagesplan")
+       - Call `NotificationService().scheduleDailyNotification(time: settings.time, title: title, body: body)`
+
+    4. **Implement `_onPickTime()`**:
+       - Call `showTimePicker(context: context, initialTime: currentSettings.time, initialEntryMode: TimePickerEntryMode.dial)`
+       - If picked is not null: call `ref.read(notificationSettingsNotifierProvider.notifier).setTime(picked)`, then call `_scheduleNotification()` to reschedule with new time
+
+    5. **Wire notification tap navigation** in `lib/core/notifications/notification_service.dart`:
+       - Update `_onTap` to use the top-level `router` instance from `lib/core/router/router.dart`:
+         ```dart
+         import 'package:household_keeper/core/router/router.dart';
+         static void _onTap(NotificationResponse response) {
+           router.go('/');
+         }
+         ```
+       - This works because `router` is a top-level `final` in router.dart, accessible without BuildContext.
+
+    6. **Handle permanently denied state** (Claude's discretion):
+       - Use a simple approach: if `requestPermission()` returns false AND the toggle was tapped:
+         - First denial: just show SnackBar with hint text
+         - Track denial in SharedPreferences (`notifications_permission_denied_once` bool)
+         - If previously denied and denied again: show SnackBar with action button "Einstellungen offnen" that navigates to system notification settings via `AndroidFlutterLocalNotificationsPlugin`'s `openNotificationSettings()` method or Android intent
+       - Alternatively (simpler): always show the same SnackBar with the hint text on denial. If the user taps it, attempt to open system settings. This avoids tracking denial state.
+       - Pick the simpler approach: SnackBar with `notificationsPermissionDeniedHint` text. No tracking needed. The SnackBar message already says "Tippe hier, um sie zu aktivieren" — make the SnackBar action open app notification settings.
+
+    7. Run `dart analyze --fatal-infos` to ensure no warnings.
+  </action>
+  <verify>
+    <automated>cd /home/jlmak/Projects/jlmak/HouseHoldKeaper && dart analyze --fatal-infos</automated>
+  </verify>
+  <done>
+    - Settings screen shows Benachrichtigungen section between Darstellung and Uber
+    - SwitchListTile toggles notification on/off
+    - Time picker row with AnimatedSize progressive disclosure
+    - showTimePicker dialog on time row tap
+    - Permission requested on toggle ON (Android 13+)
+    - Toggle reverts to OFF on permission denial with SnackBar hint
+    - Notification scheduled with task count body on enable/time change
+    - Skip scheduling on zero-task days
+    - Notification body includes overdue split when overdue > 0
+    - Tapping notification navigates to Home tab via router.go('/')
+    - dart analyze clean
+  </done>
+</task>
+
+<task type="auto" tdd="true">
+  <name>Task 2: Widget tests for notification settings UI</name>
+  <files>
+    test/features/settings/settings_screen_test.dart
+  </files>
+  <behavior>
+    - Test: Settings screen renders Benachrichtigungen section header
+    - Test: SwitchListTile displays with label "Tagliche Erinnerung" and defaults to OFF
+    - Test: When notificationSettings.enabled is true, time picker ListTile is visible
+    - Test: When notificationSettings.enabled is false, time picker ListTile is not visible
+    - Test: Time picker displays formatted time (e.g. "07:00")
+  </behavior>
+  <action>
+    1. **Create or extend** `test/features/settings/settings_screen_test.dart`:
+       - Check if file exists; if so, extend it. If not, create it.
+       - Use provider overrides to inject mock NotificationSettingsNotifier state:
+         - Override `notificationSettingsNotifierProvider` with a mock/override that returns known state
+       - Also override `themeProvider` to provide ThemeMode.system (to avoid SharedPreferences issues in tests)
+
+    2. **Write widget tests**:
+       a. "renders Benachrichtigungen section header":
+          - Pump `SettingsScreen` wrapped in `MaterialApp` with localization delegates + `ProviderScope` with overrides
+          - Verify `find.text('Benachrichtigungen')` finds one widget
+       b. "notification toggle defaults to OFF":
+          - Override notifier with `enabled: false`
+          - Verify `SwitchListTile` value is false
+       c. "time picker visible when enabled":
+          - Override notifier with `enabled: true, time: TimeOfDay(hour: 9, minute: 30)`
+          - Verify `find.text('09:30')` (or formatted equivalent) finds one widget
+          - Verify `find.text('Uhrzeit')` finds one widget
+       d. "time picker hidden when disabled":
+          - Override notifier with `enabled: false`
+          - Verify `find.text('Uhrzeit')` finds nothing
+
+    3. Run `flutter test test/features/settings/` to confirm tests pass.
+    4. Run `flutter test` to confirm full suite passes.
+  </action>
+  <verify>
+    <automated>cd /home/jlmak/Projects/jlmak/HouseHoldKeaper && flutter test test/features/settings/</automated>
+  </verify>
+  <done>
+    - Widget tests exist for notification settings section rendering
+    - Tests cover: section header present, toggle default OFF, time picker visibility on/off, time display
+    - All tests pass including full suite
+  </done>
+</task>
+
+</tasks>
+
+<verification>
+- `flutter test` — all tests pass (existing + new notification + settings tests)
+- `dart analyze --fatal-infos` — no warnings or errors
+- Settings screen has Benachrichtigungen section with toggle and conditional time picker
+- Permission flow correctly handles grant, deny, and permanently denied
+- Notification schedules/cancels based on toggle and time changes
+- Notification tap opens Home tab
+</verification>
+
+<success_criteria>
+- User can toggle notifications on/off from Settings
+- Time picker appears only when notifications are enabled
+- Permission requested contextually on toggle ON
+- Denied permission reverts toggle with helpful SnackBar
+- Notification scheduled with task count body (or skipped on zero tasks)
+- Notification tap navigates to daily plan
+- Widget tests cover key UI states
+</success_criteria>
+
+<output>
+After completion, create `.planning/phases/04-notifications/04-02-SUMMARY.md`
+</output>

.planning/phases/04-notifications/04-03-PLAN.md

@@ -0,0 +1,96 @@
+---
+phase: 04-notifications
+plan: 03
+type: execute
+wave: 3
+depends_on:
+  - 04-02
+files_modified: []
+autonomous: true
+requirements:
+  - NOTF-01
+  - NOTF-02
+
+must_haves:
+  truths:
+    - "dart analyze --fatal-infos passes with zero issues"
+    - "All tests pass (72 existing + new notification tests)"
+    - "NOTF-01 artifacts exist: NotificationService, DAO queries, AndroidManifest permissions, timezone init"
+    - "NOTF-02 artifacts exist: NotificationSettingsNotifier, Settings UI section, toggle, time picker"
+    - "Phase 4 requirements are fully addressed"
+  artifacts: []
+  key_links: []
+---
+
+<objective>
+Verify all Phase 4 notification work is complete, tests pass, and code is clean before marking the phase done.
+
+Purpose: Quality gate ensuring NOTF-01 and NOTF-02 are fully implemented before phase completion.
+Output: Verification confirmation with test counts and analysis results.
+</objective>
+
+<execution_context>
+@/home/jlmak/.claude/get-shit-done/workflows/execute-plan.md
+@/home/jlmak/.claude/get-shit-done/templates/summary.md
+</execution_context>
+
+<context>
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+@.planning/phases/04-notifications/04-CONTEXT.md
+@.planning/phases/04-notifications/04-01-SUMMARY.md
+@.planning/phases/04-notifications/04-02-SUMMARY.md
+</context>
+
+<tasks>
+
+<task type="auto">
+  <name>Task 1: Run full verification suite</name>
+  <files></files>
+  <action>
+    1. Run `dart analyze --fatal-infos` — must produce zero issues.
+    2. Run `flutter test` — must produce zero failures. Record total test count.
+    3. Verify NOTF-01 requirements by checking file existence and content:
+       - `lib/core/notifications/notification_service.dart` exists with `scheduleDailyNotification`, `requestPermission`, `cancelAll`
+       - `lib/features/home/data/daily_plan_dao.dart` has `getOverdueAndTodayTaskCount` and `getOverdueTaskCount`
+       - `android/app/src/main/AndroidManifest.xml` has `POST_NOTIFICATIONS`, `RECEIVE_BOOT_COMPLETED`, `ScheduledNotificationBootReceiver` with `exported="true"`
+       - `android/app/build.gradle.kts` has `isCoreLibraryDesugaringEnabled = true` and `compileSdk = 35`
+       - `lib/main.dart` has timezone initialization and `NotificationService().initialize()`
+    4. Verify NOTF-02 requirements by checking:
+       - `lib/core/notifications/notification_settings_notifier.dart` exists with `setEnabled`, `setTime`
+       - `lib/features/settings/presentation/settings_screen.dart` has `SwitchListTile` and `AnimatedSize` for notification section
+       - `lib/l10n/app_de.arb` has notification-related keys (`settingsSectionNotifications`, `notificationsEnabledLabel`, etc.)
+    5. Verify notification tap navigation:
+       - `lib/core/notifications/notification_service.dart` `_onTap` references `router.go('/')`
+    6. If any issues found, fix them. If all checks pass, record results.
+  </action>
+  <verify>
+    <automated>cd /home/jlmak/Projects/jlmak/HouseHoldKeaper && dart analyze --fatal-infos && flutter test</automated>
+  </verify>
+  <done>
+    - dart analyze: zero issues
+    - flutter test: all tests pass (72 existing + new notification/settings tests)
+    - NOTF-01: NotificationService, DAO queries, Android config, timezone init all confirmed present and functional
+    - NOTF-02: NotificationSettingsNotifier, Settings UI section, toggle, time picker all confirmed present and functional
+    - Phase 4 verification gate passed
+  </done>
+</task>
+
+</tasks>
+
+<verification>
+- `dart analyze --fatal-infos` — zero issues
+- `flutter test` — all tests pass
+- All NOTF-01 and NOTF-02 artifacts exist and are correctly wired
+</verification>
+
+<success_criteria>
+- Phase 4 code is clean (no analysis warnings)
+- All tests pass
+- Both requirements (NOTF-01, NOTF-02) have their artifacts present and correctly implemented
+</success_criteria>
+
+<output>
+After completion, create `.planning/phases/04-notifications/04-03-SUMMARY.md`
+</output>