feat: 优化前端 UI 组件与交互体验

- 优化日历、待办、消息等页面交互
- 更新 ChatBloc 与 UI Schema 渲染
- 优化联系人、首页、设置页面体验

apps/lib/features/todo/ui/screens/todo_detail_screen.dart

@@ -3,6 +3,7 @@ import 'package:go_router/go_router.dart';
 import 'package:lucide_icons/lucide_icons.dart';
 import '../../../../core/di/injection.dart';
 import '../../../../core/theme/design_tokens.dart';
+import '../../../../shared/widgets/app_loading_indicator.dart';
 import '../../../../shared/widgets/page_header.dart' as widgets;
 import '../../../../shared/widgets/app_button.dart';
 import '../../../../shared/widgets/toast/toast.dart';
@@ -130,7 +131,7 @@ class _TodoDetailScreenState extends State<TodoDetailScreen> {
 
   Widget _buildContent() {
     if (_isLoading) {
-      return const Center(child: CircularProgressIndicator());
+      return const Center(child: AppLoadingIndicator(size: 22));
     }
 
     if (_error != null) {
@@ -428,6 +429,7 @@ class _EditTodoSheetState extends State<_EditTodoSheet> {
   late TextEditingController _descriptionController;
   late int _priority;
   late Set<String> _selectedScheduleItems;
+  late final Future<List<_ScheduleItemSimple>> _scheduleItemsFuture;
 
   @override
   void initState() {
@@ -438,6 +440,7 @@ class _EditTodoSheetState extends State<_EditTodoSheet> {
     );
     _priority = widget.todo.priority;
     _selectedScheduleItems = widget.todo.scheduleItems.map((e) => e.id).toSet();
+    _scheduleItemsFuture = _loadScheduleItems();
   }
 
   @override
@@ -534,11 +537,11 @@ class _EditTodoSheetState extends State<_EditTodoSheet> {
             ),
           ),
           Expanded(
-            child: FutureBuilder(
-              future: _loadScheduleItems(),
+            child: FutureBuilder<List<_ScheduleItemSimple>>(
+              future: _scheduleItemsFuture,
               builder: (context, snapshot) {
                 if (snapshot.connectionState == ConnectionState.waiting) {
-                  return const Center(child: CircularProgressIndicator());
+                  return const Center(child: AppLoadingIndicator(size: 22));
                 }
                 if (snapshot.hasError) {
                   return Center(child: Text('加载失败: ${snapshot.error}'));