feat(mine): 我的 Tab 全量实现 (#5~#13)

从 im-client-ios-swift-demo 搬运 Settings 逻辑，对齐 Gitea issue #5–#13

## 基础设施
- AuthNotifier 新增 currentUid 字段，login() 接受 uid 参数 (#5)
- LoginViewModel 登录成功后传入 user.uid
- ApiPaths 补充 account/block/store 系列路径
- Tab 重命名"设置"→"我的"，icon 改为 person_outline (#5)
- AppRouteName 新增5条子路由 (edit-profile/blocklist/language/network-diagnostics/about)
- app_router + auth_guard 同步注册新路由

## Settings Feature
- SettingsViewModel 重写为 NotifierProvider（去除 @riverpod 依赖）
  - build() 自动触发 loadProfile()
  - logout() 完整流程：API → WS 断开 → DB 关闭 → AuthNotifier
  - 6 个 navigateTo* 方法
- SettingsPage 完整 UI：资料卡 / 偏好设置 / 工具 / 关于 / 退出登录按钮 (#5 #7)
- FetchProfileUseCase: GET /app/api/user/profile (#5)
- LogoutUseCase: logout + disconnect + closeDatabase (#7)
- UpdateProfileUseCase + UpdateProfileRequest: POST /app/api/user/update-profile (#6)
- EditProfilePage + EditProfileViewModel: 昵称/bio 编辑 (#6)
- LanguagePage: 语言选择 UI 框架，l10n_sdk 待接入 (#9)
- BlocklistPage: 黑名单框架，API 待实现 (#10)
- NetworkDiagnosticsPage + ViewModel: 四步诊断（连通/TCP/DNS/HTTPS）(#12)
- AboutPage: 版本号 + 服务条款/隐私政策入口 (#13)
- settings_providers.dart: 扩展 DI 装配

## 文档
- Doc/mine_tab_architecture.md: 架构说明、数据流、路由、待完成事项

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/im_app/lib/features/settings/di/settings_providers.dart

@@ -1,21 +1,54 @@
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
+import 'package:im_app/app/di/network_provider.dart';
+import 'package:im_app/app/di/db_provider.dart';
+import 'package:im_app/core/services/socket_manager.dart';
+import 'package:im_app/features/login/di/auth_providers.dart';
 import 'package:im_app/features/settings/usecases/set_theme_usecase.dart';
+import 'package:im_app/features/settings/usecases/fetch_profile_usecase.dart';
+import 'package:im_app/features/settings/usecases/logout_usecase.dart';
+import 'package:im_app/features/settings/usecases/update_profile_usecase.dart';
 
 /// Settings feature DI 装配
 ///
-/// 手动装配 UseCase Provider，ViewModel 通过此处获取依赖。
-///
 /// ```
+/// SettingsViewModel
+///   → fetchProfileUseCaseProvider  → GET /app/api/user/profile
+///   → logoutUseCaseProvider        → POST /app/api/auth/logout + WS + DB
+///
+/// EditProfileViewModel
+///   → updateProfileUseCaseProvider → POST /app/api/user/update-profile
+///
 /// ThemeViewModel
-///   → ref.read(setThemeUseCaseProvider)   ← 此处装配
-///     → SetThemeUseCase（幂等校验）
-///       → onApply → ThemeModeNotifier.setMode()（内存 + 持久化 TODO）
+///   → setThemeUseCaseProvider      → ThemeModeNotifier（内存 + 持久化 TODO）
 /// ```
 
-// ── UseCase ───────────────────────────────────────────────────────────────────
+// ── Theme ─────────────────────────────────────────────────────────────────────
 
 /// 设置主题用例 Provider
 final setThemeUseCaseProvider = Provider<SetThemeUseCase>(
   (_) => const SetThemeUseCase(),
 );
+
+// ── Profile ────────────────────────────────────────────────────────────────────
+
+/// 获取当前用户资料用例 Provider
+final fetchProfileUseCaseProvider = Provider<FetchProfileUseCase>((ref) {
+  return FetchProfileUseCase(client: ref.read(networkSdkApiProvider));
+});
+
+/// 更新用户资料用例 Provider
+final updateProfileUseCaseProvider = Provider<UpdateProfileUseCase>((ref) {
+  return UpdateProfileUseCase(client: ref.read(networkSdkApiProvider));
+});
+
+// ── Auth ───────────────────────────────────────────────────────────────────────
+
+/// 退出登录用例 Provider
+final logoutUseCaseProvider = Provider<LogoutUseCase>((ref) {
+  return LogoutUseCase(
+    authRepository: ref.read(authRepositoryProvider),
+    socketManager: ref.read(socketManagerProvider),
+    storageApi: ref.read(storageSdkProvider),
+  );
+});