feat:增加数据存储

lib/models/menu.dart

@@ -0,0 +1,27 @@
+import 'package:fitnote/pages/history_page.dart';
+import 'package:fitnote/pages/record_page.dart';
+import 'package:fitnote/pages/setting_page.dart';
+import 'package:fitnote/pages/stats_page.dart';
+import 'package:flutter/material.dart';
+
+class PageInfo {
+  final String title;
+  final IconData icon;
+  final Widget page;
+
+  const PageInfo({required this.title, required this.icon, required this.page});
+}
+
+final List<PageInfo> pages = [
+  PageInfo(title: '记录', icon: Icons.article, page: RecordPage()),
+  PageInfo(title: '历史', icon: Icons.history, page: HistoryPage()),
+  PageInfo(title: '统计', icon: Icons.insert_chart, page: StatsPage()),
+  PageInfo(title: '设置', icon: Icons.settings, page: SettingPage()),
+];
+
+final List<Widget> pageWidgets = pages.map((item) => item.page).toList();
+
+final List<BottomNavigationBarItem> bottomNavItems =
+    pages.map((page) {
+      return BottomNavigationBarItem(icon: Icon(page.icon), label: page.title);
+    }).toList();