---
phase: 08-task-delete
plan: 02
type: execute
wave: 2
depends_on: ["08-01"]
files_modified:
  - lib/features/tasks/presentation/task_providers.dart
  - lib/features/tasks/presentation/task_form_screen.dart
autonomous: true
requirements: [DEL-01, DEL-04]

must_haves:
  truths:
    - "User sees a red delete button at the bottom of the task edit form"
    - "Tapping delete shows a confirmation dialog before any action"
    - "Confirming delete on a task with no completions removes it from the database"
    - "Confirming delete on a task with completions deactivates it (hidden from views)"
    - "After deletion the user is navigated back to the room task list"
  artifacts:
    - path: "lib/features/tasks/presentation/task_form_screen.dart"
      provides: "Delete button and confirmation dialog in edit mode"
      contains: "taskDeleteConfirmTitle"
    - path: "lib/features/tasks/presentation/task_providers.dart"
      provides: "Smart delete method using getCompletionCount"
      contains: "softDeleteTask"
  key_links:
    - from: "lib/features/tasks/presentation/task_form_screen.dart"
      to: "lib/features/tasks/presentation/task_providers.dart"
      via: "TaskActions.smartDeleteTask call from delete button callback"
      pattern: "smartDeleteTask"
    - from: "lib/features/tasks/presentation/task_providers.dart"
      to: "lib/features/tasks/data/tasks_dao.dart"
      via: "getCompletionCount + conditional deleteTask or softDeleteTask"
      pattern: "getCompletionCount.*softDeleteTask|deleteTask"
---

<objective>
Add the delete button and confirmation dialog to the task edit form, with smart delete logic in the provider layer.

Purpose: Users can remove tasks they no longer need. The smart behavior (hard vs soft delete) is invisible to the user -- they just see "delete" with a confirmation.

Output: Working delete flow on the task edit form: red button -> confirmation dialog -> smart delete -> navigate back.
</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/08-task-delete/08-CONTEXT.md
@.planning/phases/08-task-delete/08-01-SUMMARY.md

<interfaces>
<!-- Key types and contracts the executor needs. -->

From lib/features/tasks/presentation/task_providers.dart (existing TaskActions):
```dart
@riverpod
class TaskActions extends _$TaskActions {
  @override
  FutureOr<void> build() {}

  Future<int> createTask({...}) async { ... }
  Future<void> updateTask(Task task) async { ... }
  Future<void> deleteTask(int taskId) async { ... }  // calls DAO hard delete
  Future<void> completeTask(int taskId) async { ... }
}
```

From lib/features/tasks/data/tasks_dao.dart (after Plan 01):
```dart
class TasksDao {
  Future<void> deleteTask(int taskId);       // hard delete (cascade)
  Future<void> softDeleteTask(int taskId);   // sets isActive = false
  Future<int> getCompletionCount(int taskId); // count completions
}
```

From lib/features/tasks/presentation/task_form_screen.dart (edit mode section):
```dart
// History section (edit mode only) — delete button goes AFTER this
if (widget.isEditing) ...[
  const SizedBox(height: 24),
  const Divider(),
  ListTile(
    leading: const Icon(Icons.history),
    title: Text(l10n.taskHistoryTitle),
    trailing: const Icon(Icons.chevron_right),
    onTap: () => showTaskHistorySheet(
      context: context,
      taskId: widget.taskId!,
    ),
  ),
],
```

From lib/l10n/app_de.arb (existing delete l10n strings):
```json
"taskDeleteConfirmTitle": "Aufgabe l\u00f6schen?",
"taskDeleteConfirmMessage": "Die Aufgabe wird unwiderruflich gel\u00f6scht.",
"taskDeleteConfirmAction": "L\u00f6schen"
```

Room delete dialog pattern (from lib/features/rooms/presentation/rooms_screen.dart:165-189):
```dart
showDialog(
  context: context,
  builder: (ctx) => AlertDialog(
    title: Text(l10n.roomDeleteConfirmTitle),
    content: Text(l10n.roomDeleteConfirmMessage),
    actions: [
      TextButton(
        onPressed: () => Navigator.pop(ctx),
        child: Text(l10n.cancel),
      ),
      FilledButton(
        style: FilledButton.styleFrom(
          backgroundColor: Theme.of(ctx).colorScheme.error,
        ),
        onPressed: () { ... },
        child: Text(l10n.roomDeleteConfirmAction),
      ),
    ],
  ),
);
```
</interfaces>
</context>

<tasks>

<task type="auto">
  <name>Task 1: Add smartDeleteTask to TaskActions provider</name>
  <files>lib/features/tasks/presentation/task_providers.dart</files>
  <action>
Add a `smartDeleteTask` method to the `TaskActions` class in task_providers.dart. This method checks the completion count and routes to hard delete or soft delete accordingly:

```dart
/// Smart delete: hard-deletes tasks with no completions, soft-deletes tasks with completions.
Future<void> smartDeleteTask(int taskId) async {
  final db = ref.read(appDatabaseProvider);
  final completionCount = await db.tasksDao.getCompletionCount(taskId);
  if (completionCount == 0) {
    await db.tasksDao.deleteTask(taskId);
  } else {
    await db.tasksDao.softDeleteTask(taskId);
  }
}
```

Keep the existing `deleteTask` method unchanged (it is still a valid hard delete for other uses like room cascade delete).

Run `dart run build_runner build --delete-conflicting-outputs` to regenerate the provider code.
  </action>
  <verify>
    <automated>cd /home/jlmak/Projects/jlmak/HouseHoldKeaper && dart analyze --fatal-infos lib/features/tasks/presentation/task_providers.dart</automated>
  </verify>
  <done>
    - smartDeleteTask method exists on TaskActions
    - Method checks completion count and routes to hard or soft delete
    - dart analyze passes with zero issues
  </done>
</task>

<task type="auto">
  <name>Task 2: Add delete button and confirmation dialog to TaskFormScreen</name>
  <files>lib/features/tasks/presentation/task_form_screen.dart</files>
  <action>
1. In the TaskFormScreen build method's ListView children, AFTER the history section (the existing `if (widget.isEditing) ...` block ending at line ~204), add the delete button section inside the same `if (widget.isEditing)` block:

```dart
if (widget.isEditing) ...[
  const SizedBox(height: 24),
  const Divider(),
  // History ListTile (existing)
  ListTile(
    leading: const Icon(Icons.history),
    title: Text(l10n.taskHistoryTitle),
    trailing: const Icon(Icons.chevron_right),
    onTap: () => showTaskHistorySheet(
      context: context,
      taskId: widget.taskId!,
    ),
  ),
  // DELETE BUTTON — new
  const Divider(),
  const SizedBox(height: 8),
  SizedBox(
    width: double.infinity,
    child: FilledButton.icon(
      style: FilledButton.styleFrom(
        backgroundColor: theme.colorScheme.error,
        foregroundColor: theme.colorScheme.onError,
      ),
      onPressed: _isLoading ? null : _onDelete,
      icon: const Icon(Icons.delete_outline),
      label: Text(l10n.taskDeleteConfirmAction),
    ),
  ),
],
```

2. Add a `_onDelete` method to _TaskFormScreenState:

```dart
Future<void> _onDelete() async {
  final l10n = AppLocalizations.of(context);
  final confirmed = await showDialog<bool>(
    context: context,
    builder: (ctx) => AlertDialog(
      title: Text(l10n.taskDeleteConfirmTitle),
      content: Text(l10n.taskDeleteConfirmMessage),
      actions: [
        TextButton(
          onPressed: () => Navigator.pop(ctx, false),
          child: Text(l10n.cancel),
        ),
        FilledButton(
          style: FilledButton.styleFrom(
            backgroundColor: Theme.of(ctx).colorScheme.error,
          ),
          onPressed: () => Navigator.pop(ctx, true),
          child: Text(l10n.taskDeleteConfirmAction),
        ),
      ],
    ),
  );

  if (confirmed != true || !mounted) return;

  setState(() => _isLoading = true);
  try {
    await ref.read(taskActionsProvider.notifier).smartDeleteTask(widget.taskId!);
    if (mounted) {
      context.pop();
    }
  } finally {
    if (mounted) {
      setState(() => _isLoading = false);
    }
  }
}
```

Note: The `l10n.cancel` string should already exist from the room delete dialog. If not, use `MaterialLocalizations.of(context).cancelButtonLabel`.

3. Verify `cancel` l10n key exists. If it does not exist in app_de.arb, check for the existing cancel button pattern in rooms_screen.dart and use the same approach.
  </action>
  <verify>
    <automated>cd /home/jlmak/Projects/jlmak/HouseHoldKeaper && flutter test --reporter compact && dart analyze --fatal-infos</automated>
  </verify>
  <done>
    - Red delete button visible at bottom of task edit form (below history, separated by divider)
    - Delete button only shows in edit mode (not create mode)
    - Tapping delete shows AlertDialog with title "Aufgabe loschen?" and error-colored confirm button
    - Canceling dialog does nothing
    - Confirming dialog calls smartDeleteTask and pops back to room task list
    - Button is disabled while loading (_isLoading)
    - All existing tests pass, dart analyze clean
  </done>
</task>

</tasks>

<verification>
- Task edit form shows red delete button below history section with divider separator
- Delete button is NOT shown in create mode
- Tapping delete shows confirmation dialog matching room delete dialog pattern
- Confirming deletes/deactivates the task and navigates back
- Canceling returns to the form without changes
- All tests pass: `flutter test --reporter compact`
- Code quality: `dart analyze --fatal-infos` reports zero issues
</verification>

<success_criteria>
- Complete delete flow works: open task -> scroll to bottom -> tap delete -> confirm -> back to room task list
- Smart delete is invisible to user: tasks with completions are deactivated, tasks without are removed
- Delete button follows Material 3 error color pattern
- Confirmation dialog uses existing German l10n strings
- All 137+ tests pass
</success_criteria>

<output>
After completion, create `.planning/phases/08-task-delete/08-02-SUMMARY.md`
</output>
