feat:增加hive模块

lib/widgets/todo_form.dart

@@ -8,7 +8,7 @@ import 'package:flisp_app/utils/date_utils.dart';
 class TodoForm extends StatefulWidget {
   final GlobalKey<FormBuilderState> formKey;
   final bool isEditing;
-  final TodoItem? initialTodo;
+  final Todo? initialTodo;
 
   const TodoForm({
     super.key,

lib/widgets/todo_widget.dart

@@ -5,7 +5,7 @@ import 'package:flutter/material.dart';
 import 'package:toggle_switch/toggle_switch.dart';
 
 // 统计卡片
-Widget buildStatsCard(List<TodoItem> todos) {
+Widget buildStatsCard(List<Todo> todos) {
   int totalCount = todos.length;
 
   int activeCount = todos.where((todo) => !todo.isCompleted).length;
@@ -70,9 +70,9 @@ Widget buildTabs({
 }
 
 Widget buildTodoList({
-  required List<TodoItem> todos,
+  required List<Todo> todos,
   required ValueChanged<String> onToggleTodo,
-  required ValueChanged<TodoItem> onEditTodo,
+  required ValueChanged<Todo> onEditTodo,
 }) {
   return ListView.separated(
     itemCount: todos.length,
@@ -89,9 +89,9 @@ Widget buildTodoList({
 }
 
 Widget _buildTodoItem({
-  required TodoItem todo,
+  required Todo todo,
   required ValueChanged<String> onToggle,
-  required ValueChanged<TodoItem> onEdit,
+  required ValueChanged<Todo> onEdit,
 }) {
   return buildCard(
     child: ListTile(
@@ -113,7 +113,7 @@ Widget _buildTodoItem({
   );
 }
 
-Widget _buildTodoTitle(TodoItem todo) {
+Widget _buildTodoTitle(Todo todo) {
   return Text(
     todo.title,
     style: TextStyle(
@@ -125,7 +125,7 @@ Widget _buildTodoTitle(TodoItem todo) {
 }
 
 // 构建待办事项副标题
-Widget? _buildTodoSubtitle(TodoItem todo) {
+Widget? _buildTodoSubtitle(Todo todo) {
   final isOverdue =
       todo.dueDate != null &&
       todo.dueDate!.isBefore(DateTime.now()) &&