refactor: 重构聊天数据层至core并简化首页UI

apps/lib/app/di/injection.dart

@@ -18,7 +18,9 @@ import '../../features/auth/data/repositories/auth_repository_impl.dart';
 import '../../features/auth/presentation/bloc/auth_bloc.dart';
 import '../../features/auth/presentation/bloc/auth_event.dart';
 import '../../features/chat/presentation/bloc/chat_bloc.dart';
-import '../../features/chat/data/repositories/chat_history_repository.dart';
+import '../../core/chat/chat_api.dart';
+import '../../core/chat/chat_history_repository.dart';
+import '../../features/chat/data/apis/chat_api_impl.dart';
 import '../../features/calendar/data/apis/calendar_api.dart';
 import '../../features/calendar/data/services/calendar_service.dart';
 import '../../shared/state/calendar_state_manager.dart';
@@ -127,8 +129,11 @@ Future<void> configureDependencies() async {
     InboxRepositoryImpl(apiClient: apiClient, store: hybridCacheStore),
   );
 
+  final chatApi = ChatApiImpl(apiClient);
+  sl.registerSingleton<ChatApi>(chatApi);
+
   final chatHistoryRepository = ChatHistoryRepository(
-    apiClient: apiClient,
+    chatApi: chatApi,
     store: hybridCacheStore,
   );
   sl.registerSingleton<ChatHistoryRepository>(chatHistoryRepository);
@@ -167,7 +172,7 @@ Future<void> configureDependencies() async {
   sl.registerSingleton<AuthBloc>(authBloc);
   sl.registerSingleton<SessionController>(AuthSessionController(authBloc));
   sl.registerSingleton<ChatBloc>(
-    ChatBloc(apiClient: apiClient, historyRepository: chatHistoryRepository),
+    ChatBloc(chatApi: chatApi, historyRepository: chatHistoryRepository),
   );
 
   apiClient.setRefreshCallback((token) async {