docs(04-03): complete Phase 4 verification gate plan

- dart analyze --fatal-infos: zero issues
- flutter test: 89/89 tests pass (72 original + 12 notification + 5 settings widget)
- NOTF-01 confirmed: NotificationService, DailyPlanDao queries, Android config, timezone init
- NOTF-02 confirmed: NotificationSettingsNotifier, SettingsScreen section, toggle, time picker
- Phase 4 (Notifications) fully complete — all 4 phases of v1.0 milestone done

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/ROADMAP.md

@@ -15,7 +15,7 @@ Decimal phases appear between their surrounding integers in numeric order.
 - [x] **Phase 1: Foundation** - Project scaffold, database, state management, theme, and localization infrastructure (completed 2026-03-15)
 - [x] **Phase 2: Rooms and Tasks** - Complete room CRUD, task CRUD with auto-scheduling, and bundled templates (completed 2026-03-15)
 - [x] **Phase 3: Daily Plan and Cleanliness** - Primary daily plan screen with overdue/today/upcoming, cleanliness indicators per room (completed 2026-03-16)
-- [ ] **Phase 4: Notifications** - Daily summary notification with configurable time and Android permission handling
+- [x] **Phase 4: Notifications** - Daily summary notification with configurable time and Android permission handling (completed 2026-03-16)
 
 ## Phase Details
 
@@ -97,4 +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 | 2/3 | In Progress|  |
+| 4. Notifications | 3/3 | Complete   | 2026-03-16 |

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: executing
-stopped_at: Completed 04-02-PLAN.md (Notification Settings UI)
+stopped_at: Completed 04-03-PLAN.md (Phase 4 Verification Gate)
-last_updated: "2026-03-16T14:09:29.326Z"
+last_updated: "2026-03-16T14:13:32.150Z"
 last_activity: 2026-03-16 — Completed 04-01-PLAN.md (Notification infrastructure)
 progress:
   total_phases: 4
-  completed_phases: 3
+  completed_phases: 4
   total_plans: 13
-  completed_plans: 12
+  completed_plans: 13
   percent: 100
 ---
 
@@ -62,6 +62,7 @@ Progress: [██████████] 100%
 | Phase 03 P03 | 2 | 2 tasks | 0 files |
 | Phase 04-notifications P01 | 9 | 2 tasks | 11 files |
 | Phase 04-notifications P02 | 5 | 2 tasks | 5 files |
+| Phase 04-notifications P03 | 2 | 1 tasks | 0 files |
 
 ## Accumulated Context
 
@@ -110,6 +111,7 @@ Recent decisions affecting current work:
 - [Phase 04-01]: nextInstanceOf exposed as @visibleForTesting public method to enable TZ logic unit testing without native dispatch mocking
 - [Phase Phase 04-02]: openNotificationSettings() not available in flutter_local_notifications v21 — simplified to informational SnackBar (no action button)
 - [Phase Phase 04-02]: ConsumerStatefulWidget for SettingsScreen — async permission callbacks require mounted guards after every await
+- [Phase 04-notifications]: Phase 4 verification gate passed: dart analyze --fatal-infos zero issues, 89/89 tests passing — all NOTF-01 and NOTF-02 requirements confirmed functional
 
 ### Pending Todos
 
@@ -123,6 +125,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-03-16T14:09:29.324Z
+Last session: 2026-03-16T14:13:32.148Z
-Stopped at: Completed 04-02-PLAN.md (Notification Settings UI)
+Stopped at: Completed 04-03-PLAN.md (Phase 4 Verification Gate)
 Resume file: None

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

@@ -0,0 +1,98 @@
+---
+phase: 04-notifications
+plan: 03
+subsystem: testing
+tags: [flutter, dart-analyze, flutter-test, verification]
+
+# Dependency graph
+requires:
+  - phase: 04-notifications/04-01
+    provides: NotificationService, NotificationSettingsNotifier, DailyPlanDao queries, Android config, timezone init, ARB strings
+  - phase: 04-notifications/04-02
+    provides: SettingsScreen Benachrichtigungen section, permission flow, scheduling integration, widget tests
+
+provides:
+  - Phase 4 verification gate passed: dart analyze clean, 89/89 tests pass
+  - All NOTF-01 artifacts confirmed present and functional
+  - All NOTF-02 artifacts confirmed present and functional
+
+affects: [phase completion]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: []
+
+key-files:
+  created: []
+  modified: []
+
+key-decisions:
+  - "Phase 4 verification gate passed: dart analyze --fatal-infos zero issues, 89/89 tests passing (72 original + 12 notification unit + 5 notification settings widget)"
+
+patterns-established: []
+
+requirements-completed: [NOTF-01, NOTF-02]
+
+# Metrics
+duration: 2min
+completed: 2026-03-16
+---
+
+# Phase 4 Plan 3: Phase 4 Verification Gate Summary
+
+**dart analyze --fatal-infos zero issues and 89/89 tests passing confirming NOTF-01 (NotificationService, DailyPlanDao queries, Android config, timezone init) and NOTF-02 (NotificationSettingsNotifier, SettingsScreen Benachrichtigungen section, SwitchListTile, AnimatedSize time picker) fully implemented**
+
+## Performance
+
+- **Duration:** 2 min
+- **Started:** 2026-03-16T14:10:51Z
+- **Completed:** 2026-03-16T14:12:07Z
+- **Tasks:** 1
+- **Files modified:** 0
+
+## Accomplishments
+- `dart analyze --fatal-infos` passed with zero issues
+- `flutter test` passed: 89/89 tests (72 pre-Phase-4 + 12 notification unit tests + 5 notification settings widget tests)
+- NOTF-01 artifacts confirmed: `NotificationService` with `scheduleDailyNotification`, `requestPermission`, `cancelAll`; `DailyPlanDao` with `getOverdueAndTodayTaskCount` and `getOverdueTaskCount`; AndroidManifest with `POST_NOTIFICATIONS`, `RECEIVE_BOOT_COMPLETED`, `ScheduledNotificationBootReceiver exported="true"`; `build.gradle.kts` with `isCoreLibraryDesugaringEnabled = true` and `compileSdk = 35`; `main.dart` with timezone init chain and `NotificationService().initialize()`
+- NOTF-02 artifacts confirmed: `NotificationSettingsNotifier` with `setEnabled` and `setTime`; `SettingsScreen` with `SwitchListTile` and `AnimatedSize` notification section; `app_de.arb` with all 7 notification keys (`settingsSectionNotifications`, `notificationsEnabledLabel`, `notificationsTimeLabel`, `notificationsPermissionDeniedHint`, `notificationTitle`, `notificationBody`, `notificationBodyWithOverdue`)
+- Notification tap navigation confirmed: `_onTap` calls `router.go('/')`
+
+## Task Commits
+
+No source code commits required — verification-only task.
+
+**Plan metadata:** (docs commit — see final commit hash below)
+
+## Files Created/Modified
+None — pure verification gate.
+
+## Decisions Made
+None - followed plan as specified. All artifacts were already present from Plans 01 and 02.
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+None — all checks passed on first run.
+
+## User Setup Required
+None — no external service configuration required.
+
+## Next Phase Readiness
+- Phase 4 (Notifications) is fully complete and verified
+- All 4 phases of the v1.0 milestone are complete
+- 89 tests passing, zero analysis issues
+- App delivers on core value: users see what needs doing today, mark it done, get daily reminders, trust recurring scheduling
+
+---
+*Phase: 04-notifications*
+*Completed: 2026-03-16*
+
+## Self-Check: PASSED
+
+- lib/core/notifications/notification_service.dart: FOUND
+- lib/core/notifications/notification_settings_notifier.dart: FOUND
+- lib/features/settings/presentation/settings_screen.dart: FOUND
+- .planning/phases/04-notifications/04-03-SUMMARY.md: FOUND