refactor: 移除前端 Mock API，新增共享组件，优化认证流程

- 删除 mock_api_client、mock_calendar_service、mock_history_service
- 新增 fixed_length_code_input、link_button、message_composer 共享组件
- 优化登录/注册/密码重置页面使用新组件
- 简化 injection.dart 移除 mock 分支
- 更新 env.dart 配置（BACKEND_URL 替换 API_URL）
- 后端 agentscope 工具和测试更新
- 重构 AGENTS.md 文档结构
- 新增 deploy/ 目录和 protocol 文档

apps/lib/main.dart

@@ -5,10 +5,9 @@ import 'core/di/injection.dart';
 import 'core/router/app_router.dart';
 import 'core/theme/app_theme.dart';
 import 'core/notifications/local_notification_service.dart';
-import 'features/auth/data/models/auth_response.dart';
 import 'features/auth/presentation/bloc/auth_bloc.dart';
 import 'features/auth/presentation/bloc/auth_event.dart';
-import 'features/calendar/data/services/mock_calendar_service.dart';
+import 'features/calendar/data/services/calendar_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -18,16 +17,7 @@ void main() async {
   await notificationService.initialize();
 
   final authBloc = sl<AuthBloc>();
-
-  if (Env.isMockApi) {
-    authBloc.add(
-      AuthLoggedIn(
-        user: AuthUser(id: 'user_001', email: 'test@example.com'),
-      ),
-    );
-  } else {
-    authBloc.add(AuthStarted());
-  }
+  authBloc.add(AuthStarted());
 
   try {
     final now = DateTime.now();