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/presentation/calendar_day_list.dart

@@ -14,7 +14,8 @@ const _overdueColor = Color(0xFFE07A5F);
 
 /// Shows the task list for the selected calendar day.
 ///
-/// Watches [calendarDayProvider] and renders one of several states:
+/// Watches [calendarDayProvider] (or [roomCalendarDayProvider] when [roomId]
+/// is provided) and renders one of several states:
 /// - Loading spinner while data loads
 /// - Error text on failure
 /// - First-run empty state (no rooms/tasks at all) — prompts to create a room
@@ -22,7 +23,10 @@ const _overdueColor = Color(0xFFE07A5F);
 /// - Celebration state (today is selected and all tasks are done)
 /// - Has-tasks state with optional overdue section (today only) and checkboxes
 class CalendarDayList extends ConsumerStatefulWidget {
-  const CalendarDayList({super.key});
+  const CalendarDayList({super.key, this.roomId});
+
+  /// When non-null, filters tasks to this room only.
+  final int? roomId;
 
   @override
   ConsumerState<CalendarDayList> createState() => _CalendarDayListState();
@@ -43,7 +47,9 @@ class _CalendarDayListState extends ConsumerState<CalendarDayList> {
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context);
     final theme = Theme.of(context);
-    final dayState = ref.watch(calendarDayProvider);
+    final dayState = widget.roomId != null
+        ? ref.watch(roomCalendarDayProvider(widget.roomId!))
+        : ref.watch(calendarDayProvider);
 
     return dayState.when(
       loading: () => const Center(child: CircularProgressIndicator()),
@@ -96,6 +102,46 @@ class _CalendarDayListState extends ConsumerState<CalendarDayList> {
     AppLocalizations l10n,
     ThemeData theme,
   ) {
+    // Room-scoped: prompt to create a task in this room.
+    if (widget.roomId != null) {
+      return Center(
+        child: Padding(
+          padding: const EdgeInsets.symmetric(horizontal: 32),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              Icon(
+                Icons.task_alt,
+                size: 80,
+                color: theme.colorScheme.onSurface.withValues(alpha: 0.4),
+              ),
+              const SizedBox(height: 24),
+              Text(
+                l10n.taskEmptyTitle,
+                style: theme.textTheme.headlineSmall,
+                textAlign: TextAlign.center,
+              ),
+              const SizedBox(height: 8),
+              Text(
+                l10n.taskEmptyMessage,
+                style: theme.textTheme.bodyLarge?.copyWith(
+                  color: theme.colorScheme.onSurface.withValues(alpha: 0.6),
+                ),
+                textAlign: TextAlign.center,
+              ),
+              const SizedBox(height: 24),
+              FilledButton.tonal(
+                onPressed: () =>
+                    context.go('/rooms/${widget.roomId}/tasks/new'),
+                child: Text(l10n.taskEmptyAction),
+              ),
+            ],
+          ),
+        ),
+      );
+    }
+
+    // Home-screen: prompt to create a room.
     return Center(
       child: Padding(
         padding: const EdgeInsets.symmetric(horizontal: 32),
@@ -194,20 +240,36 @@ class _CalendarDayListState extends ConsumerState<CalendarDayList> {
     AppLocalizations l10n,
     ThemeData theme,
   ) {
+    final now = DateTime.now();
+    final today = DateTime(now.year, now.month, now.day);
+    final isFuture = state.selectedDate.isAfter(today);
+    final showRoomTag = widget.roomId == null;
+
     final items = <Widget>[];
 
     // Overdue section (today only, when overdue tasks exist).
+    // Overdue tasks are always completable (they're past due, only shown on today).
     if (state.overdueTasks.isNotEmpty) {
       items.add(_buildSectionHeader(l10n.dailyPlanSectionOverdue, theme,
           color: _overdueColor));
       for (final tw in state.overdueTasks) {
-        items.add(_buildAnimatedTaskRow(tw, isOverdue: true));
+        items.add(_buildAnimatedTaskRow(
+          tw,
+          isOverdue: true,
+          showRoomTag: showRoomTag,
+          canComplete: true,
+        ));
       }
     }
 
     // Day tasks section.
     for (final tw in state.dayTasks) {
-      items.add(_buildAnimatedTaskRow(tw, isOverdue: false));
+      items.add(_buildAnimatedTaskRow(
+        tw,
+        isOverdue: false,
+        showRoomTag: showRoomTag,
+        canComplete: !isFuture,
+      ));
     }
 
     return ListView(children: items);
@@ -227,7 +289,12 @@ class _CalendarDayListState extends ConsumerState<CalendarDayList> {
     );
   }
 
-  Widget _buildAnimatedTaskRow(TaskWithRoom tw, {required bool isOverdue}) {
+  Widget _buildAnimatedTaskRow(
+    TaskWithRoom tw, {
+    required bool isOverdue,
+    required bool showRoomTag,
+    required bool canComplete,
+  }) {
     final isCompleting = _completingTaskIds.contains(tw.task.id);
 
     if (isCompleting) {
@@ -235,6 +302,7 @@ class _CalendarDayListState extends ConsumerState<CalendarDayList> {
         key: ValueKey('completing-${tw.task.id}'),
         taskWithRoom: tw,
         isOverdue: isOverdue,
+        showRoomTag: showRoomTag,
       );
     }
 
@@ -242,6 +310,8 @@ class _CalendarDayListState extends ConsumerState<CalendarDayList> {
       key: ValueKey('task-${tw.task.id}'),
       taskWithRoom: tw,
       isOverdue: isOverdue,
+      showRoomTag: showRoomTag,
+      canComplete: canComplete,
       onCompleted: () => _onTaskCompleted(tw.task.id),
     );
   }
@@ -253,10 +323,12 @@ class _CompletingTaskRow extends StatefulWidget {
     super.key,
     required this.taskWithRoom,
     required this.isOverdue,
+    required this.showRoomTag,
   });
 
   final TaskWithRoom taskWithRoom;
   final bool isOverdue;
+  final bool showRoomTag;
 
   @override
   State<_CompletingTaskRow> createState() => _CompletingTaskRowState();
@@ -302,6 +374,7 @@ class _CompletingTaskRowState extends State<_CompletingTaskRow>
         child: CalendarTaskRow(
           taskWithRoom: widget.taskWithRoom,
           isOverdue: widget.isOverdue,
+          showRoomTag: widget.showRoomTag,
           onCompleted: () {}, // Already completing — ignore repeat taps.
         ),
       ),