test(TaskListScreen): add integration tests for filtered and overdue task states

- Covers empty states, celebration state, and scheduled/overdue task rendering
- Verifies proper checkbox behavior for future tasks
- Tests AppBar for sort dropdown, edit/delete actions, and calendar strip
- Adds necessary test helpers and overrides for room-specific tasks

test/features/home/data/calendar_dao_test.dart

@@ -283,4 +283,267 @@ void main() {
       expect(result.first.roomId, room2Id);
     });
   });
+
+  group('CalendarDao.watchTasksForDateInRoom', () {
+    test('returns empty list when no tasks exist in room', () async {
+      final result = await db.calendarDao
+          .watchTasksForDateInRoom(DateTime(2026, 3, 16), room1Id)
+          .first;
+      expect(result, isEmpty);
+    });
+
+    test('returns only tasks due on the queried date in the specified room',
+        () async {
+      // Task due on March 16 in room1
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Abspuelen',
+        intervalType: IntervalType.daily,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 16, 9, 30),
+      ));
+      // Task due on March 15 in room1 (should NOT appear)
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Staubsaugen',
+        intervalType: IntervalType.weekly,
+        effortLevel: EffortLevel.medium,
+        nextDueDate: DateTime(2026, 3, 15),
+      ));
+      // Task due on March 17 in room1 (should NOT appear)
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Fenster putzen',
+        intervalType: IntervalType.monthly,
+        effortLevel: EffortLevel.high,
+        nextDueDate: DateTime(2026, 3, 17),
+      ));
+
+      final result = await db.calendarDao
+          .watchTasksForDateInRoom(DateTime(2026, 3, 16), room1Id)
+          .first;
+      expect(result.length, 1);
+      expect(result.first.task.name, 'Abspuelen');
+    });
+
+    test('does not return tasks from other rooms on the same date', () async {
+      // Task due on March 16 in room1
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Kueche Aufgabe',
+        intervalType: IntervalType.daily,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 16),
+      ));
+      // Task due on March 16 in room2 (should NOT appear when querying room1)
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room2Id,
+        name: 'Bad Aufgabe',
+        intervalType: IntervalType.weekly,
+        effortLevel: EffortLevel.medium,
+        nextDueDate: DateTime(2026, 3, 16),
+      ));
+
+      final result = await db.calendarDao
+          .watchTasksForDateInRoom(DateTime(2026, 3, 16), room1Id)
+          .first;
+      expect(result.length, 1);
+      expect(result.first.task.name, 'Kueche Aufgabe');
+      expect(result.first.roomId, room1Id);
+    });
+
+    test('returns tasks sorted alphabetically by name', () async {
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Zitrone putzen',
+        intervalType: IntervalType.daily,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 18),
+      ));
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Abspuelen',
+        intervalType: IntervalType.daily,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 18, 10),
+      ));
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Moppen',
+        intervalType: IntervalType.weekly,
+        effortLevel: EffortLevel.medium,
+        nextDueDate: DateTime(2026, 3, 18, 8),
+      ));
+
+      final result = await db.calendarDao
+          .watchTasksForDateInRoom(DateTime(2026, 3, 18), room1Id)
+          .first;
+      expect(result.length, 3);
+      expect(result[0].task.name, 'Abspuelen');
+      expect(result[1].task.name, 'Moppen');
+      expect(result[2].task.name, 'Zitrone putzen');
+    });
+  });
+
+  group('CalendarDao.watchOverdueTasksInRoom', () {
+    test('returns empty list when no overdue tasks in room', () async {
+      final result = await db.calendarDao
+          .watchOverdueTasksInRoom(DateTime(2026, 3, 16), room1Id)
+          .first;
+      expect(result, isEmpty);
+    });
+
+    test('returns only overdue tasks in the specified room', () async {
+      // Task due March 15 in room1 — overdue relative to March 16
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Ueberfaelliges Task',
+        intervalType: IntervalType.daily,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 15),
+      ));
+      // Task due March 10 in room1 — also overdue
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Sehr altes Task',
+        intervalType: IntervalType.weekly,
+        effortLevel: EffortLevel.medium,
+        nextDueDate: DateTime(2026, 3, 10),
+      ));
+      // Task due on March 16 in room1 — NOT overdue (should NOT appear)
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Heutiges Task',
+        intervalType: IntervalType.daily,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 16),
+      ));
+
+      final result = await db.calendarDao
+          .watchOverdueTasksInRoom(DateTime(2026, 3, 16), room1Id)
+          .first;
+      expect(result.length, 2);
+    });
+
+    test('does not return overdue tasks from other rooms', () async {
+      // Overdue task in room1
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Kueche Overdue',
+        intervalType: IntervalType.daily,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 14),
+      ));
+      // Overdue task in room2 (should NOT appear when querying room1)
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room2Id,
+        name: 'Bad Overdue',
+        intervalType: IntervalType.weekly,
+        effortLevel: EffortLevel.medium,
+        nextDueDate: DateTime(2026, 3, 14),
+      ));
+
+      final result = await db.calendarDao
+          .watchOverdueTasksInRoom(DateTime(2026, 3, 16), room1Id)
+          .first;
+      expect(result.length, 1);
+      expect(result.first.task.name, 'Kueche Overdue');
+      expect(result.first.roomId, room1Id);
+    });
+
+    test('returns overdue tasks sorted by nextDueDate ascending', () async {
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Neues Overdue',
+        intervalType: IntervalType.daily,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 15),
+      ));
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Altes Overdue',
+        intervalType: IntervalType.monthly,
+        effortLevel: EffortLevel.medium,
+        nextDueDate: DateTime(2026, 3, 1),
+      ));
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Mittleres Overdue',
+        intervalType: IntervalType.weekly,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 10),
+      ));
+
+      final result = await db.calendarDao
+          .watchOverdueTasksInRoom(DateTime(2026, 3, 16), room1Id)
+          .first;
+      expect(result.length, 3);
+      expect(result[0].task.name, 'Altes Overdue');
+      expect(result[1].task.name, 'Mittleres Overdue');
+      expect(result[2].task.name, 'Neues Overdue');
+    });
+  });
+
+  group('CalendarDao.getTaskCountInRoom', () {
+    test('returns 0 when room has no tasks', () async {
+      final count = await db.calendarDao.getTaskCountInRoom(room1Id);
+      expect(count, 0);
+    });
+
+    test('returns correct count for room', () async {
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Aufgabe 1',
+        intervalType: IntervalType.daily,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 16),
+      ));
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Aufgabe 2',
+        intervalType: IntervalType.weekly,
+        effortLevel: EffortLevel.medium,
+        nextDueDate: DateTime(2026, 3, 20),
+      ));
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Aufgabe 3',
+        intervalType: IntervalType.monthly,
+        effortLevel: EffortLevel.high,
+        nextDueDate: DateTime(2026, 3, 25),
+      ));
+
+      final count = await db.calendarDao.getTaskCountInRoom(room1Id);
+      expect(count, 3);
+    });
+
+    test('does not count tasks from other rooms', () async {
+      // Two tasks in room1
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Kueche Aufgabe 1',
+        intervalType: IntervalType.daily,
+        effortLevel: EffortLevel.low,
+        nextDueDate: DateTime(2026, 3, 16),
+      ));
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room1Id,
+        name: 'Kueche Aufgabe 2',
+        intervalType: IntervalType.weekly,
+        effortLevel: EffortLevel.medium,
+        nextDueDate: DateTime(2026, 3, 20),
+      ));
+      // One task in room2 (should NOT be counted for room1)
+      await db.tasksDao.insertTask(TasksCompanion.insert(
+        roomId: room2Id,
+        name: 'Bad Aufgabe',
+        intervalType: IntervalType.monthly,
+        effortLevel: EffortLevel.high,
+        nextDueDate: DateTime(2026, 3, 18),
+      ));
+
+      final count = await db.calendarDao.getTaskCountInRoom(room1Id);
+      expect(count, 2);
+    });
+  });
 }

test/features/tasks/presentation/task_list_screen_test.dart

@@ -0,0 +1,325 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import 'package:household_keeper/core/database/database.dart';
+import 'package:household_keeper/features/home/domain/calendar_models.dart';
+import 'package:household_keeper/features/home/domain/daily_plan_models.dart';
+import 'package:household_keeper/features/home/presentation/calendar_providers.dart';
+import 'package:household_keeper/features/tasks/domain/effort_level.dart';
+import 'package:household_keeper/features/tasks/domain/frequency.dart';
+import 'package:household_keeper/features/tasks/domain/task_sort_option.dart';
+import 'package:household_keeper/features/tasks/presentation/sort_preference_notifier.dart';
+import 'package:household_keeper/features/tasks/presentation/task_list_screen.dart';
+import 'package:household_keeper/l10n/app_localizations.dart';
+
+/// Helper to create a test [Task] with sensible defaults.
+Task _makeTask({
+  int id = 1,
+  int roomId = 1,
+  String name = 'Test Task',
+  required DateTime nextDueDate,
+}) {
+  return Task(
+    id: id,
+    roomId: roomId,
+    name: name,
+    intervalType: IntervalType.weekly,
+    intervalDays: 7,
+    effortLevel: EffortLevel.medium,
+    nextDueDate: nextDueDate,
+    createdAt: DateTime(2026, 1, 1),
+  );
+}
+
+/// Helper to create a [TaskWithRoom].
+TaskWithRoom _makeTaskWithRoom({
+  int id = 1,
+  int roomId = 1,
+  String taskName = 'Test Task',
+  String roomName = 'Kueche',
+  required DateTime nextDueDate,
+}) {
+  return TaskWithRoom(
+    task: _makeTask(
+      id: id,
+      roomId: roomId,
+      name: taskName,
+      nextDueDate: nextDueDate,
+    ),
+    roomName: roomName,
+    roomId: roomId,
+  );
+}
+
+/// Build the app with [roomCalendarDayProvider] overridden to the given state.
+///
+/// Uses [UncontrolledProviderScope] with a [ProviderContainer] to avoid
+/// the riverpod_lint scoped_providers_should_specify_dependencies warning.
+///
+/// Renders [TaskListScreen] directly with roomId 1, wrapped in a [MaterialApp]
+/// to avoid router complexity. The _RoomTitle widget will show '...' because
+/// appDatabaseProvider is not overridden — this is acceptable for these tests.
+Widget _buildApp(CalendarDayState dayState) {
+  final container = ProviderContainer(overrides: [
+    roomCalendarDayProvider.overrideWith(
+      (ref, roomId) => Stream.value(dayState),
+    ),
+    selectedDateProvider.overrideWith(SelectedDateNotifier.new),
+    sortPreferenceProvider.overrideWith(SortPreferenceNotifier.new),
+  ]);
+
+  return UncontrolledProviderScope(
+    container: container,
+    child: const MaterialApp(
+      localizationsDelegates: AppLocalizations.localizationsDelegates,
+      supportedLocales: [Locale('de')],
+      locale: Locale('de'),
+      home: TaskListScreen(roomId: 1),
+    ),
+  );
+}
+
+void main() {
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  final now = DateTime.now();
+  final today = DateTime(now.year, now.month, now.day);
+  final yesterday = today.subtract(const Duration(days: 1));
+
+  group('TaskListScreen empty states', () {
+    testWidgets('shows no-tasks empty state when no tasks exist in room',
+        (tester) async {
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: today,
+        dayTasks: const [],
+        overdueTasks: const [],
+        totalTaskCount: 0,
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // Should show "Noch keine Aufgaben" (taskEmptyTitle)
+      expect(find.text('Noch keine Aufgaben'), findsOneWidget);
+      // Should show action button to create a task
+      expect(find.text('Aufgabe erstellen'), findsOneWidget);
+    });
+
+    testWidgets('shows celebration state when tasks exist but today is clear',
+        (tester) async {
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: today,
+        dayTasks: const [],
+        overdueTasks: const [],
+        totalTaskCount: 5, // tasks exist elsewhere
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // Should show celebration state
+      expect(find.byIcon(Icons.celebration_outlined), findsOneWidget);
+      expect(find.text('Alles erledigt! \u{1F31F}'), findsOneWidget);
+    });
+
+    testWidgets('shows empty-day state for non-today date with no tasks',
+        (tester) async {
+      final tomorrow = today.add(const Duration(days: 1));
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: tomorrow,
+        dayTasks: const [],
+        overdueTasks: const [],
+        totalTaskCount: 5, // tasks exist on other days
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // Should show "Keine Aufgaben" (not celebration — not today)
+      expect(find.text('Keine Aufgaben'), findsOneWidget);
+      expect(find.byIcon(Icons.event_available), findsOneWidget);
+    });
+  });
+
+  group('TaskListScreen normal state', () {
+    testWidgets('shows overdue section when overdue tasks exist (today)',
+        (tester) async {
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: today,
+        dayTasks: [
+          _makeTaskWithRoom(
+            id: 2,
+            taskName: 'Staubsaugen',
+            roomName: 'Wohnzimmer',
+            nextDueDate: today,
+          ),
+        ],
+        overdueTasks: [
+          _makeTaskWithRoom(
+            id: 1,
+            taskName: 'Boden wischen',
+            roomName: 'Kueche',
+            nextDueDate: yesterday,
+          ),
+        ],
+        totalTaskCount: 2,
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // Should show overdue section header
+      expect(find.text('\u00dcberf\u00e4llig'), findsOneWidget);
+      // Should show both tasks
+      expect(find.text('Boden wischen'), findsOneWidget);
+      expect(find.text('Staubsaugen'), findsOneWidget);
+    });
+
+    testWidgets('does not show overdue section for non-today date',
+        (tester) async {
+      final tomorrow = today.add(const Duration(days: 1));
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: tomorrow,
+        dayTasks: [
+          _makeTaskWithRoom(
+            id: 1,
+            taskName: 'Staubsaugen',
+            roomName: 'Wohnzimmer',
+            nextDueDate: tomorrow,
+          ),
+        ],
+        overdueTasks: const [], // No overdue for non-today
+        totalTaskCount: 1,
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // Should NOT show overdue section header
+      expect(find.text('\u00dcberf\u00e4llig'), findsNothing);
+      // Should show day task
+      expect(find.text('Staubsaugen'), findsOneWidget);
+    });
+
+    testWidgets('tasks have checkboxes', (tester) async {
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: today,
+        dayTasks: [
+          _makeTaskWithRoom(
+            id: 1,
+            taskName: 'Staubsaugen',
+            roomName: 'Wohnzimmer',
+            nextDueDate: today,
+          ),
+        ],
+        overdueTasks: const [],
+        totalTaskCount: 1,
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // Task should have a checkbox
+      expect(find.byType(Checkbox), findsOneWidget);
+    });
+
+    testWidgets('room tag is NOT shown on task rows', (tester) async {
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: today,
+        dayTasks: [
+          _makeTaskWithRoom(
+            id: 1,
+            taskName: 'Staubsaugen',
+            roomName: 'Kueche',
+            nextDueDate: today,
+          ),
+        ],
+        overdueTasks: const [],
+        totalTaskCount: 1,
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // Task name should be visible
+      expect(find.text('Staubsaugen'), findsOneWidget);
+      // Room tag text should NOT appear (showRoomTag is false in room context)
+      expect(find.text('Kueche'), findsNothing);
+    });
+  });
+
+  group('TaskListScreen future task restriction', () {
+    testWidgets('checkboxes are disabled for future tasks', (tester) async {
+      final futureDate = today.add(const Duration(days: 3));
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: futureDate,
+        dayTasks: [
+          _makeTaskWithRoom(
+            id: 1,
+            taskName: 'Fenster putzen',
+            roomName: 'Kueche',
+            nextDueDate: futureDate,
+          ),
+        ],
+        overdueTasks: const [],
+        totalTaskCount: 1,
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // Task should be visible
+      expect(find.text('Fenster putzen'), findsOneWidget);
+
+      // Checkbox should exist but be disabled (onChanged is null)
+      final checkbox = tester.widget<Checkbox>(find.byType(Checkbox));
+      expect(checkbox.onChanged, isNull);
+    });
+  });
+
+  group('TaskListScreen AppBar', () {
+    testWidgets('shows sort dropdown in AppBar', (tester) async {
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: today,
+        dayTasks: const [],
+        overdueTasks: const [],
+        totalTaskCount: 0,
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // SortDropdown wraps a PopupMenuButton<TaskSortOption>
+      expect(
+        find.byType(PopupMenuButton<TaskSortOption>),
+        findsOneWidget,
+      );
+    });
+
+    testWidgets('shows edit and delete icon buttons', (tester) async {
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: today,
+        dayTasks: const [],
+        overdueTasks: const [],
+        totalTaskCount: 0,
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // Edit icon button
+      expect(find.byIcon(Icons.edit), findsOneWidget);
+      // Delete icon button
+      expect(find.byIcon(Icons.delete), findsOneWidget);
+    });
+
+    testWidgets('calendar strip is shown', (tester) async {
+      await tester.pumpWidget(_buildApp(CalendarDayState(
+        selectedDate: today,
+        dayTasks: const [],
+        overdueTasks: const [],
+        totalTaskCount: 0,
+      )));
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 500));
+
+      // The strip is a horizontal ListView — verify it exists by finding
+      // ListView widgets (strip + potentially the task list).
+      expect(find.byType(ListView), findsWidgets);
+    });
+  });
+}