docs(08-02): complete task delete UI plan

- Add 08-02-SUMMARY.md with delete button and smartDeleteTask outcomes
- Update STATE.md with progress, decisions, and session continuity
- Update ROADMAP.md: phase 08-task-delete 2/2 plans complete
- Mark DEL-01 and DEL-04 requirements complete

.planning/REQUIREMENTS.md

@@ -9,10 +9,10 @@ Requirements for milestone v1.2 Polish & Task Management. Each maps to roadmap p
 
 ### Task Delete
 
-- [ ] **DEL-01**: User can delete a task from the task edit form via a clearly visible delete action
+- [x] **DEL-01**: User can delete a task from the task edit form via a clearly visible delete action
 - [x] **DEL-02**: Deleting a task that has never been completed removes it from the database entirely (hard delete)
 - [x] **DEL-03**: Deleting a task that has been completed at least once deactivates it instead (soft delete) — task is hidden from all active views but preserved in the database for future statistics
-- [ ] **DEL-04**: User sees a confirmation before deleting/deactivating a task
+- [x] **DEL-04**: User sees a confirmation before deleting/deactivating a task
 
 ### Task Creation UX
 

.planning/ROADMAP.md

@@ -33,7 +33,7 @@ See `milestones/v1.1-ROADMAP.md` for full phase details.
 
 **v1.2 Polish & Task Management (Phases 8-10):**
 
-- [ ] **Phase 8: Task Delete** - Add smart delete action to tasks — hard delete if never completed, soft delete (deactivate) if completed at least once
+- [x] **Phase 8: Task Delete** - Add smart delete action to tasks — hard delete if never completed, soft delete (deactivate) if completed at least once (completed 2026-03-18)
 - [ ] **Phase 9: Task Creation UX** - Rework the frequency picker from flat preset chips to an intuitive "Every N units" interface with quick-select shortcuts
 - [ ] **Phase 10: Dead Code Cleanup** - Remove orphaned v1.0 daily plan files and verify no regressions
 
@@ -43,7 +43,7 @@ See `milestones/v1.1-ROADMAP.md` for full phase details.
 **Goal**: Users can remove tasks they no longer need, with smart preservation of completion history for future statistics
 **Depends on**: Phase 7 (v1.1 shipped — calendar, history, and sorting all in place)
 **Requirements**: DEL-01, DEL-02, DEL-03, DEL-04
-**Plans:** 1/2 plans executed
+**Plans:** 2/2 plans complete
 Plans:
 - [ ] 08-01-PLAN.md — Data layer: isActive column, schema migration, DAO filters and methods
 - [ ] 08-02-PLAN.md — UI layer: delete button, confirmation dialog, smart delete provider
@@ -86,6 +86,6 @@ Plans:
 | 5. Calendar Strip | v1.1 | 2/2 | Complete | 2026-03-16 |
 | 6. Task History | v1.1 | 1/1 | Complete | 2026-03-16 |
 | 7. Task Sorting | v1.1 | 2/2 | Complete | 2026-03-16 |
-| 8. Task Delete | 1/2 | In Progress|  | - |
+| 8. Task Delete | 2/2 | Complete   | 2026-03-18 | - |
 | 9. Task Creation UX | v1.2 | - | Planned | - |
 | 10. Dead Code Cleanup | v1.2 | - | Planned | - |

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: "Ready for /gsd:plan-phase 8"
-stopped_at: Completed 08-task-delete 08-01-PLAN.md
+stopped_at: Completed 08-task-delete 08-02-PLAN.md
-last_updated: "2026-03-18T19:58:20.028Z"
+last_updated: "2026-03-18T20:03:07.082Z"
 last_activity: 2026-03-18 — Created v1.2 milestone
 progress:
   total_phases: 3
-  completed_phases: 0
+  completed_phases: 1
   total_plans: 2
-  completed_plans: 1
+  completed_plans: 2
   percent: 0
 ---
 
@@ -43,6 +43,7 @@ Progress: [░░░░░░░░░░] 0% (0/3 phases)
 | LOC (lib) | 7,773 | 9,051 | TBD |
 | Tests | 89 | 108 | TBD |
 | Phase 08-task-delete P01 | 9 | 2 tasks | 11 files |
+| Phase 08-task-delete P02 | 2 | 2 tasks | 3 files |
 
 ## Accumulated Context
 
@@ -52,6 +53,8 @@ Decisions archived to PROJECT.md Key Decisions table.
 - [Phase 08-task-delete]: isActive uses BoolColumn.withDefault(true) so existing rows are automatically active after migration without backfill
 - [Phase 08-task-delete]: Migration uses from==2 (not from<3) for addColumn to avoid duplicate-column error when createTable already includes isActive in current schema definition
 - [Phase 08-task-delete]: Migration tests updated to only test v1->v3 and v2->v3 paths since AppDatabase.schemaVersion=3 always migrates to v3
+- [Phase 08-task-delete]: smartDeleteTask kept separate from deleteTask to preserve existing hard-delete path for cascade/other uses
+- [Phase 08-task-delete]: Delete button placed after history section with divider, visible only in edit mode
 
 ### Pending Todos
 
@@ -63,7 +66,7 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-03-18T19:58:20.026Z
+Last session: 2026-03-18T20:03:07.081Z
-Stopped at: Completed 08-task-delete 08-01-PLAN.md
+Stopped at: Completed 08-task-delete 08-02-PLAN.md
 Resume file: None
 Next action: /gsd:plan-phase 8

.planning/phases/08-task-delete/08-02-SUMMARY.md

@@ -0,0 +1,117 @@
+---
+phase: 08-task-delete
+plan: 02
+subsystem: ui
+tags: [flutter, riverpod, drift, material3, l10n]
+
+# Dependency graph
+requires:
+  - phase: 08-task-delete plan 01
+    provides: softDeleteTask and getCompletionCount on TasksDao, isActive column migration
+
+provides:
+  - smartDeleteTask on TaskActions provider (hard delete if 0 completions, soft delete otherwise)
+  - Red delete button in task edit form with Material 3 error color
+  - Confirmation AlertDialog using existing German l10n strings
+  - Full delete flow: button -> dialog -> smart delete -> navigate back
+
+affects: [task-form, task-providers, any future task management UI]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - Smart delete pattern: check completion count to decide hard vs soft delete
+    - Delete confirmation dialog matching room delete pattern with error-colored FilledButton
+
+key-files:
+  created: []
+  modified:
+    - lib/features/tasks/presentation/task_providers.dart
+    - lib/features/tasks/presentation/task_form_screen.dart
+
+key-decisions:
+  - "smartDeleteTask kept separate from deleteTask to preserve existing hard-delete path for cascade/other uses"
+  - "Delete button placed after history section with divider, visible only in edit mode"
+
+patterns-established:
+  - "Delete confirmation pattern: showDialog<bool> returning true/false, error-colored FilledButton for confirm"
+  - "Smart delete pattern: getCompletionCount -> conditional hard/soft delete invisible to user"
+
+requirements-completed: [DEL-01, DEL-04]
+
+# Metrics
+duration: 2min
+completed: 2026-03-18
+---
+
+# Phase 8 Plan 02: Task Delete UI Summary
+
+**Red delete button with confirmation dialog in task edit form: hard-deletes unused tasks, soft-deletes tasks with completion history**
+
+## Performance
+
+- **Duration:** 2 min
+- **Started:** 2026-03-18T19:59:37Z
+- **Completed:** 2026-03-18T20:02:05Z
+- **Tasks:** 2
+- **Files modified:** 2
+
+## Accomplishments
+
+- Added `smartDeleteTask` to `TaskActions` Riverpod notifier — checks completion count and routes to DAO `deleteTask` (hard) or `softDeleteTask` (soft)
+- Added red `FilledButton.icon` with error colorScheme at bottom of task edit form, separated from history section by a `Divider`
+- Added `_onDelete` confirmation dialog using existing `taskDeleteConfirmTitle`, `taskDeleteConfirmMessage`, `taskDeleteConfirmAction`, and `cancel` l10n strings
+- All 144 tests pass, `dart analyze --fatal-infos` clean
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Add smartDeleteTask to TaskActions provider** - `1b1b981` (feat)
+2. **Task 2: Add delete button and confirmation dialog to TaskFormScreen** - `6133c97` (feat)
+
+**Plan metadata:** _(docs commit follows)_
+
+## Files Created/Modified
+
+- `lib/features/tasks/presentation/task_providers.dart` - Added `smartDeleteTask` method to `TaskActions` class
+- `lib/features/tasks/presentation/task_providers.g.dart` - Regenerated by build_runner (no functional changes)
+- `lib/features/tasks/presentation/task_form_screen.dart` - Added delete button in edit mode and `_onDelete` async method
+
+## Decisions Made
+
+- `smartDeleteTask` kept separate from `deleteTask` to preserve the existing hard-delete path used for room cascade deletes and any other callers
+- Delete button placed after history ListTile, inside the `if (widget.isEditing)` block, so it never appears in create mode
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- Complete delete flow is working: task edit form -> red delete button -> confirmation dialog -> smart delete -> pop back to room task list
+- Soft-deleted tasks (isActive=false) are already filtered from all views (implemented in Plan 01)
+- Phase 08-task-delete is fully complete
+
+---
+*Phase: 08-task-delete*
+*Completed: 2026-03-18*
+
+## Self-Check: PASSED
+
+- FOUND: lib/features/tasks/presentation/task_providers.dart
+- FOUND: lib/features/tasks/presentation/task_form_screen.dart
+- FOUND: .planning/phases/08-task-delete/08-02-SUMMARY.md
+- FOUND: commit 1b1b981 (smartDeleteTask)
+- FOUND: commit 6133c97 (delete button and dialog)
+- FOUND: smartDeleteTask in task_providers.dart
+- FOUND: taskDeleteConfirmTitle in task_form_screen.dart