feat:更新待办事项对话框功能

lib/widgets/todo_widget.dart

@@ -72,7 +72,7 @@ Widget buildTabs({
 Widget buildTodoList({
   required List<TodoItem> todos,
   required ValueChanged<String> onToggleTodo,
-  required ValueChanged<TodoItem> onEditTodo
+  required ValueChanged<TodoItem> onEditTodo,
 }) {
   return ListView.separated(
     itemCount: todos.length,
@@ -82,7 +82,7 @@ Widget buildTodoList({
       return _buildTodoItem(
         todo: todo,
         onToggle: onToggleTodo,
-        onEdit: onEditTodo
+        onEdit: onEditTodo,
       );
     },
   );
@@ -91,13 +91,18 @@ Widget buildTodoList({
 Widget _buildTodoItem({
   required TodoItem todo,
   required ValueChanged<String> onToggle,
-  required ValueChanged<TodoItem> onEdit
+  required ValueChanged<TodoItem> onEdit,
 }) {
   return buildCard(
     child: ListTile(
-      leading: Checkbox(
-        value: todo.isCompleted,
-        onChanged: (value) => onToggle(todo.id),
+      contentPadding: EdgeInsets.symmetric(horizontal: 8, vertical: 0),
+      leading: SizedBox(
+        width: 24,
+        child: Checkbox(
+          value: todo.isCompleted,
+          onChanged: (value) => onToggle(todo.id.toString()),
+          materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
+        ),
       ),
       title: _buildTodoTitle(todo),
       subtitle: _buildTodoSubtitle(todo),
@@ -126,8 +131,7 @@ Widget? _buildTodoSubtitle(TodoItem todo) {
       todo.dueDate!.isBefore(DateTime.now()) &&
       !todo.isCompleted;
 
-  final hasContent =
-      todo.description?.isNotEmpty == true || todo.dueDate != null;
+  final hasContent = todo.content.isNotEmpty == true || todo.dueDate != null;
 
   if (!hasContent) return null;
 
@@ -135,9 +139,9 @@ Widget? _buildTodoSubtitle(TodoItem todo) {
     direction: Axis.vertical,
     spacing: 5,
     children: [
-      if (todo.description?.isNotEmpty == true)
+      if (todo.content.isNotEmpty == true)
         Text(
-          todo.description!,
+          todo.content,
           maxLines: 1,
           overflow: TextOverflow.ellipsis,
           style: TextStyle(fontSize: 12, color: Colors.grey.shade600),
@@ -160,11 +164,7 @@ Widget _buildPriorityBadge(TodoPriority priority) {
   return Chip(
     label: Text(priority.label),
     backgroundColor: priority.color,
-    labelStyle: TextStyle(
-      color: Colors.white,
-      fontSize: 12,
-      fontWeight: FontWeight.bold,
-    ),
+    labelStyle: TextStyle(color: Colors.white, fontWeight: FontWeight.bold),
     shape: RoundedRectangleBorder(
       borderRadius: BorderRadius.circular(8),
       side: BorderSide(color: Colors.white),
@@ -175,7 +175,7 @@ Widget _buildPriorityBadge(TodoPriority priority) {
 }
 
 // 空状态
-Widget buildEmptyState(TodoTab currentFilter) {
+Widget buildEmptyState(TodoTab tab) {
   final messages = {
     TodoTab.all: '📝 还没有待办事项\n点击➕号添加第一个任务吧～',
     TodoTab.active: '🎯 没有待完成的任务\n享受轻松时光吧！✨',
@@ -188,11 +188,10 @@ Widget buildEmptyState(TodoTab currentFilter) {
       mainAxisAlignment: MainAxisAlignment.center,
       children: [
         Icon(Icons.checklist, size: 80, color: Colors.orange.shade600),
-        const SizedBox(height: 20),
         Text(
-          messages[currentFilter] ?? '暂无数据',
+          messages[tab] ?? '暂无数据',
           textAlign: TextAlign.center,
-          style: TextStyle(fontSize: 16, color: Colors.orange.shade600),
+          style: TextStyle(color: Colors.orange.shade600),
         ),
       ],
     ),