feat(mobile-app): #79 Flutter 个人中心 + 三Tab入口接入

master 上的 Flutter APP 骨架(来自#24)已实现入口/路由/三Tab/登录/Token/Dio拦截器/离线缓存，#79唯一缺失的是个人中心页。本次补齐：

- profile/pages/profile_page.dart: 个人中心（用户信息头部+个人信息/消息/设置/帮助/关于菜单+退出登录确认）

- app_routes.dart: 新增 /profile 路由（go_router）

- main_shell_page.dart: 新增 FloatingActionButton 个人中心入口

遵循现有代码风格：go_router 路由、Provider 状态管理、Material 3、复用 AuthProvider(currentUser/logout) 与 UserModel。

分支重建为基于 master 的干净单提交，清除了原 86c768c5(IoT协议适配器，与Flutter无关的误提交)。符合设计文档 8.2。

mobile-app/lib/config/app_routes.dart

@@ -3,6 +3,7 @@ import 'package:go_router/go_router.dart';
 import '../features/auth/pages/login_page.dart';
 import '../features/auth/services/token_service.dart';
 import '../features/main_shell/pages/main_shell_page.dart';
+import '../features/profile/pages/profile_page.dart';
 import '../features/revenue/pages/bill_list_page.dart';
 
 /// 应用路由配置
@@ -10,6 +11,7 @@ class AppRoutes {
   static const String login = '/login';
   static const String main = '/main';
   static const String bills = '/bills';
+  static const String profile = '/profile';
 
   static GoRouter createRouter() {
     return GoRouter(
@@ -36,6 +38,10 @@ class AppRoutes {
           path: bills,
           builder: (context, state) => const BillListPage(),
         ),
+        GoRoute(
+          path: profile,
+          builder: (context, state) => const ProfilePage(),
+        ),
       ],
     );
   }

mobile-app/lib/features/main_shell/pages/main_shell_page.dart

@@ -1,7 +1,9 @@
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
 import '../../water_supply/pages/monitor_list_page.dart';
 import '../../patrol/pages/patrol_task_list_page.dart';
 import '../../revenue/pages/meter_reading_page.dart';
+import '../../../config/app_routes.dart';
 
 /// 主页面 - 底部三Tab导航（供水/巡检/营收）
 class MainShellPage extends StatefulWidget {
@@ -27,6 +29,12 @@ class _MainShellPageState extends State<MainShellPage> {
         index: _currentIndex,
         children: _pages,
       ),
+      // 个人中心入口（浮动按钮，不干扰各 Tab 的 AppBar）
+      floatingActionButton: FloatingActionButton(
+        onPressed: () => GoRouter.of(context).push(AppRoutes.profile),
+        tooltip: '个人中心',
+        child: const Icon(Icons.person),
+      ),
       bottomNavigationBar: BottomNavigationBar(
         currentIndex: _currentIndex,
         onTap: (index) {

mobile-app/lib/features/profile/pages/profile_page.dart

@@ -0,0 +1,190 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:provider/provider.dart';
+import '../../auth/models/user_model.dart';
+import '../../auth/services/auth_provider.dart';
+import '../../../config/app_routes.dart';
+
+/// 个人中心页面（对应 Issue #79：个人中心）
+///
+/// 展示当前登录用户信息 + 功能菜单（个人信息/消息/设置/帮助/关于）+ 退出登录。
+class ProfilePage extends StatelessWidget {
+  const ProfilePage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: const Text('个人中心')),
+      body: Consumer<AuthProvider>(
+        builder: (context, auth, _) {
+          final user = auth.currentUser;
+          return ListView(
+            children: [
+              _UserHeader(user: user),
+              const SizedBox(height: 8),
+              _MenuGroup(items: const [
+                _MenuItem(icon: Icons.person_outline, title: '个人信息'),
+                _MenuItem(icon: Icons.notifications_outlined, title: '我的消息'),
+                _MenuItem(icon: Icons.settings_outlined, title: '设置'),
+              ]),
+              const SizedBox(height: 8),
+              _MenuGroup(items: const [
+                _MenuItem(icon: Icons.help_outline, title: '帮助与反馈'),
+                _MenuItem(icon: Icons.info_outline, title: '关于'),
+              ]),
+              const SizedBox(height: 16),
+              _LogoutButton(onLogout: () => _handleLogout(context, auth)),
+              const SizedBox(height: 24),
+            ],
+          );
+        },
+      ),
+    );
+  }
+
+  Future<void> _handleLogout(BuildContext context, AuthProvider auth) async {
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (ctx) => AlertDialog(
+        title: const Text('退出登录'),
+        content: const Text('确定要退出当前账号吗？'),
+        actions: [
+          TextButton(onPressed: () => Navigator.of(ctx).pop(false), child: const Text('取消')),
+          TextButton(
+            onPressed: () => Navigator.of(ctx).pop(true),
+            child: const Text('退出', style: TextStyle(color: Colors.red)),
+          ),
+        ],
+      ),
+    );
+    if (confirmed == true) {
+      await auth.logout();
+      // 登出后跳转登录页（go_router 守卫也会拦截，这里显式跳转）
+      if (context.mounted) {
+        GoRouter.of(context).go(AppRoutes.login);
+      }
+    }
+  }
+}
+
+/// 用户信息头部（头像 + 姓名 + 角色/部门）
+class _UserHeader extends StatelessWidget {
+  final UserModel? user;
+  const _UserHeader({this.user});
+
+  @override
+  Widget build(BuildContext context) {
+    final name = user?.name ?? '未登录';
+    final role = user?.role ?? '';
+    final department = user?.department;
+    final phone = user?.phone;
+
+    return Container(
+      width: double.infinity,
+      padding: const EdgeInsets.symmetric(vertical: 24, horizontal: 16),
+      color: Theme.of(context).colorScheme.primary,
+      child: Column(
+        children: [
+          CircleAvatar(
+            radius: 40,
+            backgroundColor: Colors.white24,
+            child: _buildAvatar(user, name),
+          ),
+          const SizedBox(height: 12),
+          Text(name, style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold, color: Colors.white)),
+          if (role.isNotEmpty) ...[
+            const SizedBox(height: 4),
+            Text(_roleLabel(role), style: const TextStyle(color: Colors.white70)),
+          ],
+          if (department != null || phone != null) ...[
+            const SizedBox(height: 4),
+            Text(
+              [department, phone].whereType<String>().join(' · '),
+              style: const TextStyle(color: Colors.white60, fontSize: 13),
+            ),
+          ],
+        ],
+      ),
+    );
+  }
+
+  String _roleLabel(String role) {
+    const map = {'admin': '管理员', 'inspector': '巡检员', 'operator': '操作员'};
+    return map[role] ?? role;
+  }
+
+  /// 头像：有 avatar 用网络图，否则取姓名首字
+  Widget _buildAvatar(UserModel? user, String name) {
+    final avatar = user?.avatar;
+    if (avatar != null && avatar.isNotEmpty) {
+      return ClipOval(child: Image.network(avatar, width: 80, height: 80, fit: BoxFit.cover));
+    }
+    return Text(
+      name.isNotEmpty ? name.substring(0, 1) : '?',
+      style: const TextStyle(fontSize: 32, color: Colors.white),
+    );
+  }
+}
+
+/// 菜单组（带卡片容器）
+class _MenuGroup extends StatelessWidget {
+  final List<_MenuItem> items;
+  const _MenuGroup({required this.items});
+
+  @override
+  Widget build(BuildContext context) {
+    return Card(
+      margin: const EdgeInsets.symmetric(horizontal: 12),
+      child: Column(
+        children: [
+          for (int i = 0; i < items.length; i++) ...[
+            items[i],
+            if (i < items.length - 1) const Divider(height: 1, indent: 56),
+          ],
+        ],
+      ),
+    );
+  }
+}
+
+/// 单个菜单项（占位 onTap，待后续接入具体页面）
+class _MenuItem extends StatelessWidget {
+  final IconData icon;
+  final String title;
+  final VoidCallback? onTap;
+
+  const _MenuItem({required this.icon, required this.title, this.onTap});
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      leading: Icon(icon, color: Theme.of(context).colorScheme.primary),
+      title: Text(title),
+      trailing: const Icon(Icons.chevron_right, color: Colors.grey),
+      onTap: onTap ?? () => ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('$title（待实现）'))),
+    );
+  }
+}
+
+/// 退出登录按钮
+class _LogoutButton extends StatelessWidget {
+  final VoidCallback onLogout;
+  const _LogoutButton({required this.onLogout});
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(horizontal: 12),
+      child: OutlinedButton.icon(
+        onPressed: onLogout,
+        icon: const Icon(Icons.logout, color: Colors.red),
+        label: const Text('退出登录', style: TextStyle(color: Colors.red)),
+        style: OutlinedButton.styleFrom(
+          minimumSize: const Size(double.infinity, 48),
+          side: const BorderSide(color: Colors.red),
+          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
+        ),
+      ),
+    );
+  }
+}