---
phase: 01-foundation
plan: 02
subsystem: ui
tags: [flutter, go-router, material3, navigation-bar, riverpod, arb-localization]

# Dependency graph
requires:
  - phase: 01-foundation plan 01
    provides: Drift database, Riverpod providers, AppTheme, ThemeNotifier, German ARB localization
provides:
  - GoRouter with StatefulShellRoute.indexedStack and 3-tab bottom navigation
  - App shell (Scaffold + NavigationBar) with localized tab labels and thematic icons
  - Home placeholder screen with empty state and cross-tab navigation to Rooms
  - Rooms placeholder screen with empty state and action button
  - Settings screen with SegmentedButton theme switcher and About section
  - Fully wired MaterialApp.router with theme, localization, and Riverpod integration
  - App shell widget test verifying navigation destinations
affects: [02-rooms-and-tasks, 03-daily-plan]

# Tech tracking
tech-stack:
  added: []
  patterns: [StatefulShellRoute.indexedStack for tab navigation, ConsumerWidget for Riverpod-connected screens, SegmentedButton for enum selection]

key-files:
  created:
    - lib/core/router/router.dart
    - lib/shell/app_shell.dart
    - lib/features/home/presentation/home_screen.dart
    - lib/features/rooms/presentation/rooms_screen.dart
    - lib/features/settings/presentation/settings_screen.dart
    - lib/app.dart
    - test/shell/app_shell_test.dart
  modified:
    - lib/main.dart

key-decisions:
  - "Used themeProvider (not themeNotifierProvider) -- Riverpod 3 generates without Notifier suffix"

patterns-established:
  - "StatefulShellRoute.indexedStack with GoRoute branches for tab navigation"
  - "ConsumerWidget for screens needing Riverpod state (Settings)"
  - "AppLocalizations.of(context) for all user-facing text -- zero hardcoded German in Dart"
  - "SegmentedButton<ThemeMode> pattern for enum-based settings"

requirements-completed: [FOUND-03, FOUND-04, THEME-01, THEME-02]

# Metrics
duration: 8min
completed: 2026-03-15
---

# Phase 1 Plan 02: Navigation Shell and Screens Summary

**GoRouter 3-tab navigation shell with localized Home/Rooms/Settings screens, SegmentedButton theme switcher persisting via SharedPreferences, and full MaterialApp.router integration -- 16 tests passing, debug APK building**

## Performance

- **Duration:** 8 min
- **Started:** 2026-03-15T19:01:00Z
- **Completed:** 2026-03-15T19:09:00Z
- **Tasks:** 3
- **Files modified:** 8

## Accomplishments
- GoRouter with StatefulShellRoute.indexedStack providing 3-branch tab navigation (Home, Rooms, Settings)
- App shell with NavigationBar using localized German labels ("Ubersicht", "Raume", "Einstellungen") and thematic Material icons
- Home and Rooms placeholder screens with playful empty states and action buttons (Home cross-navigates to Rooms tab)
- Settings screen with grouped sections: "Darstellung" (SegmentedButton theme switcher for System/Hell/Dunkel) and "Uber" (app name, tagline, version)
- MaterialApp.router wired with GoRouter config, light/dark themes, themeMode from ThemeNotifier, and German localization
- App shell widget test verifying 3 navigation destinations with correct German labels
- Complete Phase 1 app: compiles, launches, passes all 16 tests, builds debug APK

## Task Commits

Each task was committed atomically:

1. **Task 1: Create router, navigation shell, all three screens, and app shell test** - `f2dd737` (feat)
2. **Task 2: Wire app.dart and main.dart -- launchable app with full integration** - `014722a` (feat)
3. **Task 3: Visual and functional verification** - checkpoint auto-approved (no code changes)

## Files Created/Modified
- `lib/core/router/router.dart` - GoRouter with StatefulShellRoute.indexedStack and 3 branches (/, /rooms, /settings)
- `lib/shell/app_shell.dart` - Scaffold with NavigationBar, localized labels, thematic icons
- `lib/features/home/presentation/home_screen.dart` - Empty state placeholder with cross-navigation to Rooms tab
- `lib/features/rooms/presentation/rooms_screen.dart` - Empty state placeholder with action button
- `lib/features/settings/presentation/settings_screen.dart` - SegmentedButton theme switcher + About section
- `lib/app.dart` - MaterialApp.router with theme, localization, and Riverpod integration
- `lib/main.dart` - Entry point wrapping App in ProviderScope
- `test/shell/app_shell_test.dart` - Widget test for navigation shell (FOUND-04)

## Decisions Made
- **Used themeProvider instead of themeNotifierProvider:** Riverpod 3 generates the provider name as `themeProvider` (dropping the Notifier suffix). Plan referenced `themeNotifierProvider` based on older convention. All code uses the correct generated name.

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 1 - Bug] Used themeProvider instead of themeNotifierProvider**
- **Found during:** Task 1 (settings screen and app shell test)
- **Issue:** Plan referenced `themeNotifierProvider` but Riverpod 3 code generation produces `themeProvider`
- **Fix:** Used correct generated name `themeProvider` throughout all new code
- **Files modified:** lib/features/settings/presentation/settings_screen.dart, lib/app.dart, test/shell/app_shell_test.dart
- **Verification:** dart analyze passes cleanly, all tests pass
- **Committed in:** f2dd737 and 014722a (Task 1 and Task 2 commits)

---

**Total deviations:** 1 auto-fixed (1 bug -- naming convention)
**Impact on plan:** Trivial naming difference. No scope creep.

## Issues Encountered
None

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness
- Phase 1 complete: app launches with full 3-tab navigation, theme switching, and localization
- Drift database ready to receive Room and Task tables in Phase 2
- Rooms screen placeholder ready to be replaced with room list + CRUD in Phase 2
- Home screen placeholder ready to be replaced with daily plan view in Phase 3
- Settings screen pattern established for adding notification settings in Phase 4
- All 16 tests passing (database, theme, color scheme, localization, app shell)

## Self-Check: PASSED

- All 8 key files verified present on disk
- Both task commits verified in git log (f2dd737, 014722a)
- Task 3 was checkpoint (auto-approved, no code changes)

---
*Phase: 01-foundation*
*Completed: 2026-03-15*
