chore: 全面规范化代码，遵循 CLAUDE.md 编码规范

- C# 文件命名改为 snake_case（28 个文件重命名）
- C# 类转换为主构造函数（8 个类）
- 空 catch 添加异常类型（2 处）
- 新建 GlobalUsings.cs（Health.Infrastructure、Health.WebApi）
- Flutter 移除 go_router，改用 Riverpod 路由栈
- Flutter 移除 flutter_secure_storage，改用 sqflite 持久化
- 修复 Flutter 构建路径（Flutter SDK 迁至 D 盘）
- 后端端口改为 0.0.0.0:5000，支持局域网访问

health_app/lib/core/app_router.dart

@@ -1,4 +1,5 @@
-import 'package:go_router/go_router.dart';
+import 'package:flutter/material.dart';
+import 'navigation_provider.dart';
 import '../pages/auth/login_page.dart';
 import '../pages/home/home_page.dart';
 import '../pages/chart/trend_page.dart';
@@ -9,49 +10,51 @@ import '../pages/settings/settings_pages.dart';
 import '../pages/profile/profile_page.dart';
 import '../pages/remaining_pages.dart';
 
-/// 应用路由配置
-class AppRouter {
-  AppRouter._();
-
-  static final GoRouter router = GoRouter(
-    initialLocation: '/login',
-    routes: [
-      GoRoute(path: '/login', builder: (_, _) => const LoginPage()),
-      GoRoute(path: '/home', builder: (_, _) => const HomePage()),
-      GoRoute(path: '/trend/:type', builder: (_, state) => TrendPage(metricType: state.pathParameters['type']!)),
-      GoRoute(path: '/calendar', builder: (_, _) => const HealthCalendarPage()),
-
-      // 用药
-      GoRoute(path: '/medications', builder: (_, _) => const MedicationListPage()),
-      GoRoute(path: '/medications/add', builder: (_, _) => const MedicationEditPage()),
-      GoRoute(path: '/medications/:id/edit', builder: (_, state) => MedicationEditPage(id: state.pathParameters['id'])),
-
-      // 报告
-      GoRoute(path: '/reports', builder: (_, _) => const ReportListPage()),
-      GoRoute(path: '/reports/:id', builder: (_, state) => ReportDetailPage(id: state.pathParameters['id']!)),
-
-      // 问诊
-      GoRoute(path: '/doctors', builder: (_, _) => const DoctorListPage()),
-      GoRoute(path: '/consultation/:id', builder: (_, state) => DoctorChatPage(id: state.pathParameters['id']!)),
-
-      // 运动
-      GoRoute(path: '/exercise-plan', builder: (_, _) => const ExercisePlanPage()),
-
-      // 饮食
-      GoRoute(path: '/diet-records', builder: (_, _) => const DietRecordListPage()),
-
-      // 个人中心
-      GoRoute(path: '/profile', builder: (_, _) => const ProfilePage()),
-      GoRoute(path: '/profile/edit', builder: (_, _) => const EditProfilePage()),
-      GoRoute(path: '/health-archive', builder: (_, _) => const HealthArchivePage()),
-
-      // 复查
-      GoRoute(path: '/followups', builder: (_, _) => const FollowUpListPage()),
-
-      // 设置
-      GoRoute(path: '/settings', builder: (_, _) => const SettingsPage()),
-      GoRoute(path: '/settings/notifications', builder: (_, _) => const NotificationPrefsPage()),
-      GoRoute(path: '/page/:type', builder: (_, state) => StaticTextPage(type: state.pathParameters['type']!)),
-    ],
-  );
+/// 根据路由信息返回对应页面
+Widget buildPage(RouteInfo route) {
+  final params = route.params;
+  switch (route.name) {
+    case 'login':
+      return const LoginPage();
+    case 'home':
+      return const HomePage();
+    case 'trend':
+      return TrendPage(metricType: params['type'] ?? '');
+    case 'calendar':
+      return const HealthCalendarPage();
+    case 'medications':
+      return const MedicationListPage();
+    case 'medicationAdd':
+      return const MedicationEditPage();
+    case 'medicationEdit':
+      return MedicationEditPage(id: params['id']);
+    case 'reports':
+      return const ReportListPage();
+    case 'reportDetail':
+      return ReportDetailPage(id: params['id']!);
+    case 'doctors':
+      return const DoctorListPage();
+    case 'consultation':
+      return DoctorChatPage(id: params['id']!);
+    case 'exercisePlan':
+      return const ExercisePlanPage();
+    case 'dietRecords':
+      return const DietRecordListPage();
+    case 'profile':
+      return const ProfilePage();
+    case 'profileEdit':
+      return const EditProfilePage();
+    case 'healthArchive':
+      return const HealthArchivePage();
+    case 'followups':
+      return const FollowUpListPage();
+    case 'settings':
+      return const SettingsPage();
+    case 'notificationPrefs':
+      return const NotificationPrefsPage();
+    case 'staticText':
+      return StaticTextPage(type: params['type']!);
+    default:
+      return const LoginPage();
+  }
 }