refactor: 重构聊天数据层至core并简化首页UI

apps/lib/features/chat/presentation/bloc/chat_bloc.dart

@@ -2,16 +2,15 @@ import 'dart:typed_data';
 
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:image_picker/image_picker.dart';
+import 'package:social_app/core/chat/chat_api.dart';
 import 'package:social_app/core/chat/agent_stage.dart';
+import 'package:social_app/core/chat/ag_ui_event.dart';
+import 'package:social_app/core/chat/ag_ui_service.dart';
 import 'package:social_app/core/chat/chat_list_item.dart';
 import 'package:social_app/core/chat/chat_orchestrator.dart';
-import 'package:social_app/data/network/i_api_client.dart';
+import 'package:social_app/core/chat/chat_history_repository.dart';
 import 'package:social_app/core/l10n/l10n.dart';
 
-import '../../data/models/ag_ui_event.dart';
-import '../../data/repositories/chat_history_repository.dart';
-import '../../data/services/ag_ui_service.dart';
-
 class ChatState implements ChatOrchestratorState {
   @override
   final List<ChatListItem> items;
@@ -98,14 +97,11 @@ class ChatState implements ChatOrchestratorState {
 class ChatBloc extends Cubit<ChatState> implements ChatOrchestrator {
   ChatBloc({
     AgUiService? service,
-    required IApiClient apiClient,
+    required ChatApi chatApi,
     ChatHistoryRepository? historyRepository,
   }) : _service =
            service ??
-           AgUiService(
-             apiClient: apiClient,
-             historyRepository: historyRepository,
-           ),
+           AgUiService(chatApi: chatApi, historyRepository: historyRepository),
        super(const ChatState()) {
     _service.onEvent = _handleEvent;
   }
@@ -434,7 +430,20 @@ class ChatBloc extends Cubit<ChatState> implements ChatOrchestrator {
       ),
     );
     try {
-      final sendResult = await _service.sendMessage(content, images: images);
+      final uploadInputs = await Future.wait(
+        (images ?? const <XFile>[]).map(
+          (image) async => AttachmentUploadInput(
+            name: image.name,
+            mimeType: image.mimeType ?? 'image/jpeg',
+            bytes: await image.readAsBytes(),
+            localPath: image.path,
+          ),
+        ),
+      );
+      final sendResult = await _service.sendMessage(
+        content,
+        attachments: uploadInputs,
+      );
       _syncUploadedAttachments(
         messageId: messageId,
         uploadedAttachments: sendResult.uploadedAttachments,