docs(07-02): complete sort dropdown UI plan

- 07-02-SUMMARY.md: SortDropdown widget wired into HomeScreen and TaskListScreen AppBars
- STATE.md: updated metrics, decisions, session record
- ROADMAP.md: Phase 7 complete (2/2 plans done)

.planning/ROADMAP.md

@@ -23,7 +23,7 @@ See `milestones/v1.0-ROADMAP.md` for full phase details.
 
 - [x] **Phase 5: Calendar Strip** - Replace the stacked daily plan home screen with a horizontal scrollable date-strip and day-task list (completed 2026-03-16)
 - [x] **Phase 6: Task History** - Record every task completion with a timestamp and expose a per-task history view (completed 2026-03-16)
-- [ ] **Phase 7: Task Sorting** - Add alphabetical, interval, and effort sort options to task lists
+- [x] **Phase 7: Task Sorting** - Add alphabetical, interval, and effort sort options to task lists (completed 2026-03-16)
 
 ## Phase Details
 
@@ -63,7 +63,7 @@ Plans:
   2. Selecting alphabetical sort orders tasks A-Z by name within the visible list
   3. Selecting interval sort orders tasks from most-frequent (daily) to least-frequent (yearly/custom) intervals
   4. Selecting effort sort orders tasks from lowest effort to highest effort level
-**Plans:** 1/2 plans executed
+**Plans:** 2/2 plans complete
 Plans:
 - [ ] 07-01-PLAN.md — Sort model, persistence notifier, localization, provider integration
 - [ ] 07-02-PLAN.md — Sort dropdown widget, HomeScreen AppBar, TaskListScreen integration, tests
@@ -78,4 +78,4 @@ Plans:
 | 4. Notifications | v1.0 | 3/3 | Complete | 2026-03-16 |
 | 5. Calendar Strip | 2/2 | Complete   | 2026-03-16 | - |
 | 6. Task History | 1/1 | Complete   | 2026-03-16 | - |
-| 7. Task Sorting | 1/2 | In Progress|  | - |
+| 7. Task Sorting | 2/2 | Complete   | 2026-03-16 | - |

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: completed
-stopped_at: Completed 07-task-sorting/07-01-PLAN.md
+stopped_at: Completed 07-task-sorting/07-02-PLAN.md
-last_updated: "2026-03-16T21:34:49.629Z"
+last_updated: "2026-03-16T21:40:24.558Z"
 last_activity: 2026-03-16 — Completed Phase 6 Plan 01 (task completion history)
 progress:
   total_phases: 3
-  completed_phases: 2
+  completed_phases: 3
   total_plans: 5
-  completed_plans: 4
+  completed_plans: 5
   percent: 100
 ---
 
@@ -46,6 +46,7 @@ Progress: [██████████] 100% (1/1 plans in Phase 6)
 | Phase 05-calendar-strip P02 | 8 | 3 tasks | 9 files |
 | Phase 06-task-history P01 | 5 | 2 tasks | 9 files |
 | Phase 07-task-sorting P01 | 4 | 2 tasks | 9 files |
+| Phase 07-task-sorting P02 | 4 | 2 tasks | 5 files |
 
 ## Accumulated Context
 
@@ -67,6 +68,8 @@ Progress: [██████████] 100% (1/1 plans in Phase 6)
 - [Phase 07-task-sorting]: Default sort is alphabetical — continuity with existing A-Z SQL sort in CalendarDayList
 - [Phase 07-task-sorting]: overdueTasks are NOT sorted — pinned at top in existing order per design decision
 - [Phase 07-task-sorting]: Sort preference stored as enum.name string in SharedPreferences (not intEnum) — enum reordering safe
+- [Phase 07-task-sorting]: Used PopupMenuButton for SortDropdown in AppBar — menu overlay vs inline expansion, Material 3 pattern
+- [Phase 07-task-sorting]: HomeScreen uses nested Scaffold for AppBar — standard StatefulShellRoute.indexedStack per-tab AppBar pattern
 
 ### Pending Todos
 
@@ -78,7 +81,7 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-03-16T21:34:49.627Z
+Last session: 2026-03-16T21:40:24.556Z
-Stopped at: Completed 07-task-sorting/07-01-PLAN.md
+Stopped at: Completed 07-task-sorting/07-02-PLAN.md
 Resume file: None
 Next action: Phase 7 (task sorting) or release

.planning/phases/07-task-sorting/07-02-SUMMARY.md

@@ -0,0 +1,125 @@
+---
+phase: 07-task-sorting
+plan: 02
+subsystem: ui
+tags: [flutter, riverpod, material3, popup-menu, sort-ui, localization]
+
+# Dependency graph
+requires:
+  - phase: 07-task-sorting
+    plan: 01
+    provides: sortPreferenceProvider, TaskSortOption enum, German sort l10n strings
+
+provides:
+  - SortDropdown ConsumerWidget (PopupMenuButton<TaskSortOption> with check marks)
+  - HomeScreen with AppBar (title: Übersicht, actions: SortDropdown)
+  - TaskListScreen AppBar with SortDropdown before edit/delete buttons
+
+affects: [home_screen_test.dart, app_shell_test.dart, any screen showing HomeScreen]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - "PopupMenuButton<TaskSortOption> with Opacity check mark — avoids layout shift vs conditional Icon"
+    - "Nested Scaffold inside AppShell tab body — standard pattern for per-tab AppBars in StatefulShellRoute"
+
+key-files:
+  created:
+    - lib/features/tasks/presentation/sort_dropdown.dart
+  modified:
+    - lib/features/home/presentation/home_screen.dart
+    - lib/features/tasks/presentation/task_list_screen.dart
+    - test/features/home/presentation/home_screen_test.dart
+    - test/shell/app_shell_test.dart
+
+key-decisions:
+  - "Used PopupMenuButton instead of DropdownButton for AppBar — menu overlay vs inline expansion, consistent with Material 3 AppBar action patterns"
+  - "Opacity(opacity: isSelected ? 1 : 0) for check mark — preserves item width alignment vs conditional show/hide"
+  - "HomeScreen Scaffold is nested inside AppShell Scaffold — standard StatefulShellRoute pattern for per-tab AppBars"
+
+# Metrics
+duration: 4min
+completed: 2026-03-16
+---
+
+# Phase 07 Plan 02: Sort Dropdown UI Summary
+
+**SortDropdown ConsumerWidget using PopupMenuButton wired into HomeScreen AppBar (title: Übersicht) and TaskListScreen AppBar before edit/delete actions**
+
+## Performance
+
+- **Duration:** 4 min
+- **Started:** 2026-03-16T21:35:56Z
+- **Completed:** 2026-03-16T21:39:24Z
+- **Tasks:** 2
+- **Files modified:** 5 (1 created, 4 modified)
+
+## Accomplishments
+
+- SortDropdown ConsumerWidget: PopupMenuButton<TaskSortOption> with sort icon, current label, and check mark on active option
+- HomeScreen wrapped in Scaffold with AppBar titled "Übersicht" and SortDropdown in trailing actions
+- TaskListScreen AppBar has SortDropdown before the existing edit/delete IconButtons
+- 2 new tests in HomeScreen test suite: verifies PopupMenuButton and AppBar title presence
+- Auto-fixed app_shell_test regression caused by "Übersicht" now appearing twice (AppBar + bottom nav)
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: SortDropdown widget and HomeScreen/TaskListScreen integration** - `e5eccb7` (feat)
+2. **Task 2: Sort dropdown tests and AppShell test fix** - `a3e4d02` (feat)
+
+## Files Created/Modified
+
+- `lib/features/tasks/presentation/sort_dropdown.dart` - Reusable SortDropdown ConsumerWidget with PopupMenuButton<TaskSortOption>
+- `lib/features/home/presentation/home_screen.dart` - Added Scaffold with AppBar (Übersicht title + SortDropdown)
+- `lib/features/tasks/presentation/task_list_screen.dart` - Added SortDropdown before edit/delete in AppBar actions
+- `test/features/home/presentation/home_screen_test.dart` - Added sortPreferenceProvider override + 2 new sort dropdown tests
+- `test/shell/app_shell_test.dart` - Fixed findsOneWidget -> findsWidgets for 'Übersicht' (now in AppBar + bottom nav)
+
+## Decisions Made
+
+- Used PopupMenuButton instead of DropdownButton for AppBar actions — menu overlay is cleaner in AppBar context (Material 3)
+- Opacity trick for check mark: `Opacity(opacity: isSelected ? 1 : 0)` preserves item width so labels align regardless of selection
+- HomeScreen uses nested Scaffold for AppBar — standard pattern in StatefulShellRoute.indexedStack; AppShell provides bottom nav, HomeScreen provides AppBar
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 1 - Bug] Fixed AppShell test regression from 'Übersicht' duplicate**
+- **Found during:** Task 2 test run
+- **Issue:** `app_shell_test.dart` expected `findsOneWidget` for 'Übersicht'. Adding the HomeScreen AppBar title caused the string to appear twice (AppBar + bottom nav label).
+- **Fix:** Changed `findsOneWidget` to `findsWidgets` in `app_shell_test.dart` line 67. Applied same fix to new `home_screen_test.dart` AppBar title test.
+- **Files modified:** `test/shell/app_shell_test.dart`, `test/features/home/presentation/home_screen_test.dart`
+- **Commit:** `a3e4d02`
+
+## Issues Encountered
+
+None beyond the auto-fixed regression.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- Phase 07 (task sorting) is now complete: data layer (07-01) + UI layer (07-02)
+- Sort dropdown is live in both HomeScreen and TaskListScreen AppBars
+- Selecting a sort option reactively reorders task lists via sortPreferenceProvider
+- Preference persists across app restarts via SharedPreferences
+
+---
+*Phase: 07-task-sorting*
+*Completed: 2026-03-16*
+
+## Self-Check: PASSED
+
+- FOUND: lib/features/tasks/presentation/sort_dropdown.dart
+- FOUND: lib/features/home/presentation/home_screen.dart (modified)
+- FOUND: lib/features/tasks/presentation/task_list_screen.dart (modified)
+- FOUND: test/features/home/presentation/home_screen_test.dart (modified)
+- FOUND: test/shell/app_shell_test.dart (modified)
+- Commits e5eccb7, a3e4d02 verified in git log
+- All 115 tests pass, dart analyze clean