新增导航

lib/main.dart

@@ -1,5 +1,7 @@
 import 'package:flutter/material.dart';
 import './pages/home_page.dart';
+import './pages/statistics_page.dart';
+import './pages/profile_page.dart';
 
 void main() {
   runApp(const MyApp());
@@ -10,14 +12,63 @@ class MyApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    // 移除debug标签
     return MaterialApp(
       debugShowCheckedModeBanner: false,
       title: '记账本',
       theme: ThemeData(
-        primarySwatch: Colors.blue,
+        primaryColor: const Color(0xFF9FE2BF),
+        colorScheme: ColorScheme.fromSeed(
+          seedColor: const Color(0xFF9FE2BF),
+        ),
+      ),
+      home: const MainPage(),
+    );
+  }
+}
+
+class MainPage extends StatefulWidget {
+  const MainPage({Key? key}) : super(key: key);
+
+  @override
+  State<MainPage> createState() => _MainPageState();
+}
+
+class _MainPageState extends State<MainPage> {
+  int _currentIndex = 0;
+  
+  // 页面列表
+  final List<Widget> _pages = [
+    const HomePage(),
+    const StatisticsPage(),
+    const ProfilePage(),
+  ];
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: _pages[_currentIndex],
+      bottomNavigationBar: BottomNavigationBar(
+        currentIndex: _currentIndex,
+        onTap: (index) {
+          setState(() {
+            _currentIndex = index;
+          });
+        },
+        items: const [
+          BottomNavigationBarItem(
+            icon: Icon(Icons.account_balance_wallet),
+            label: '记账',
+          ),
+          BottomNavigationBarItem(
+            icon: Icon(Icons.insert_chart),
+            label: '统计',
+          ),
+          BottomNavigationBarItem(
+            icon: Icon(Icons.person),
+            label: '我的',
+          ),
+        ],
       ),
-      home: const HomePage(),
     );
   }
 }

lib/pages/home_page.dart

@@ -5,7 +5,6 @@ import 'dart:async';
 import '../models/record.dart';
 import './record_page.dart';
 import '../widgets/record_list.dart';
-import '../data/mock_data.dart';  // 暂时使用模拟数据
 import '../services/database_service.dart';
 import '../widgets/weekly_spending_chart.dart';
 import '../widgets/monthly_summary_card.dart';

lib/pages/profile_page.dart

@@ -0,0 +1,17 @@
+import 'package:flutter/material.dart';
+
+class ProfilePage extends StatelessWidget {
+  const ProfilePage({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('我的'),
+      ),
+      body: const Center(
+        child: Text('个人中心开发中...'),
+      ),
+    );
+  }
+} 

lib/pages/statistics_page.dart

@@ -0,0 +1,17 @@
+import 'package:flutter/material.dart';
+
+class StatisticsPage extends StatelessWidget {
+  const StatisticsPage({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('统计'),
+      ),
+      body: const Center(
+        child: Text('统计功能开发中...'),
+      ),
+    );
+  }
+}