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

lib/features/home/data/calendar_dao.dart

@@ -55,6 +55,33 @@ class CalendarDao extends DatabaseAccessor<AppDatabase>
     return result.read(countExp) ?? 0;
   }
 
+  /// Watch tasks due on [date] within a specific [roomId].
+  ///
+  /// Same as [watchTasksForDate] but filtered to a single room.
+  Stream<List<TaskWithRoom>> watchTasksForDateInRoom(
+      DateTime date, int roomId) {
+    final startOfDay = DateTime(date.year, date.month, date.day);
+    final endOfDay = startOfDay.add(const Duration(days: 1));
+
+    final query = select(tasks).join([
+      innerJoin(rooms, rooms.id.equalsExp(tasks.roomId)),
+    ]);
+    query.where(
+      tasks.nextDueDate.isBiggerOrEqualValue(startOfDay) &
+          tasks.nextDueDate.isSmallerThanValue(endOfDay) &
+          tasks.roomId.equals(roomId),
+    );
+    query.orderBy([OrderingTerm.asc(tasks.name)]);
+
+    return query.watch().map((rows) {
+      return rows.map((row) {
+        final task = row.readTable(tasks);
+        final room = row.readTable(rooms);
+        return TaskWithRoom(task: task, roomName: room.name, roomId: room.id);
+      }).toList();
+    });
+  }
+
   /// Watch tasks whose [nextDueDate] is strictly before [referenceDate].
   ///
   /// Returns tasks sorted by [nextDueDate] ascending (oldest first).
@@ -84,4 +111,50 @@ class CalendarDao extends DatabaseAccessor<AppDatabase>
       }).toList();
     });
   }
+
+  /// Watch overdue tasks (before [referenceDate]) within a specific [roomId].
+  ///
+  /// Same as [watchOverdueTasks] but filtered to a single room.
+  Stream<List<TaskWithRoom>> watchOverdueTasksInRoom(
+      DateTime referenceDate, int roomId) {
+    final startOfReferenceDay = DateTime(
+      referenceDate.year,
+      referenceDate.month,
+      referenceDate.day,
+    );
+
+    final query = select(tasks).join([
+      innerJoin(rooms, rooms.id.equalsExp(tasks.roomId)),
+    ]);
+    query.where(
+      tasks.nextDueDate.isSmallerThanValue(startOfReferenceDay) &
+          tasks.roomId.equals(roomId),
+    );
+    query.orderBy([OrderingTerm.asc(tasks.nextDueDate)]);
+
+    return query.watch().map((rows) {
+      return rows.map((row) {
+        final task = row.readTable(tasks);
+        final room = row.readTable(rooms);
+        return TaskWithRoom(
+          task: task,
+          roomName: room.name,
+          roomId: room.id,
+        );
+      }).toList();
+    });
+  }
+
+  /// Total task count within a specific room.
+  ///
+  /// Used to distinguish first-run empty state from celebration state
+  /// in the room calendar view.
+  Future<int> getTaskCountInRoom(int roomId) async {
+    final countExp = tasks.id.count();
+    final query = selectOnly(tasks)
+      ..addColumns([countExp])
+      ..where(tasks.roomId.equals(roomId));
+    final result = await query.getSingle();
+    return result.read(countExp) ?? 0;
+  }
 }