feat:更新主题色兼容

lib/pages/todo_page.dart

@@ -86,7 +86,7 @@ class TodoPageState extends State<TodoPage> {
         ),
         ButtonSegment<TodoSortMode>(
           value: TodoSortMode.priority,
-          icon: Icon(Icons.flag_outlined, size: 16,),
+          icon: Icon(Icons.flag_outlined, size: 16),
           label: const Text('优先级', style: TextStyle(fontSize: 12)),
         ),
       ],
@@ -123,13 +123,16 @@ class TodoPageState extends State<TodoPage> {
 
   // 切换待办事项完成状态
   void _toggleTodo(Todo todo) async {
-    await notifyService.cancelNotification(todo.id);
+    final bool? result = await showConfirmDialog(context, '确定已完成该待办吗？');
+    if (result == true) {
+      await notifyService.cancelNotification(todo.id);
 
-    setState(() {
-      todo.isCompleted = !todo.isCompleted;
-      todo.scheduledTime = null;
-      todoService.updateTodo(todo);
-    });
+      setState(() {
+        todo.isCompleted = !todo.isCompleted;
+        todo.scheduledTime = null;
+        todoService.updateTodo(todo);
+      });
+    }
   }
 
   // 显示对话框