feat: Connect AddTask to Drift DB — remove sample tasks [AITM-232]

lib/features/tasks/screens/add_task_screen.dart

@@ -55,7 +55,7 @@ class _AddTaskSheetState extends ConsumerState<_AddTaskSheet> {
     final taskTime = ref.read(selectedTaskTimeProvider);
     final deadline = _resolveDeadline(taskDay, taskTime);
     final now = DateTime.now();
-    final tasks = ref.read(tasksProvider).valueOrNull ?? [];
+    final tasks = ref.read(tasksProvider).value ?? [];
 
     final entity = TaskEntity(
       id: const Uuid().v4(),

lib/features/zen_mode/screens/zen_screen.dart

@@ -56,7 +56,7 @@ class ZenScreen extends ConsumerWidget {
                     Expanded(
                       child: ElevatedButton(
                         onPressed: () {
-                          ref.read(tasksProvider.notifier).completeTask(task.id);
+                          ref.read(taskRepositoryProvider).completeTask(task.id);
                           ref.read(petStateProvider.notifier).incrementTasksDone();
                         },
                         style: ElevatedButton.styleFrom(
@@ -76,7 +76,10 @@ class ZenScreen extends ConsumerWidget {
                     Expanded(
                       child: TextButton(
                         onPressed: () {
-                          ref.read(tasksProvider.notifier).skipTask(task.id);
+                          ref.read(taskRepositoryProvider).updateTask(
+                                task.copyWith(
+                                    sortOrder: task.sortOrder + 100),
+                              );
                         },
                         style: TextButton.styleFrom(
                           foregroundColor: KittieColors.brownLight,

test/widget_test.dart

@@ -9,7 +9,7 @@ void main() {
     await tester.pumpWidget(
       const ProviderScope(child: KittieApp()),
     );
-    await tester.pumpAndSettle();
+    await tester.pump();
 
     // App renders without crashing
     expect(find.byType(MaterialApp), findsOneWidget);