[fix] i18n import error

api/app/i18n/__init__.py

@@ -61,6 +61,12 @@ from app.i18n.logger import (
     log_translation_error,
 )
 from app.i18n.middleware import LanguageMiddleware
+from app.i18n.serializers import (
+    I18nResponseMixin,
+    WorkspaceSerializer,
+    WorkspaceMemberSerializer,
+    WorkspaceInviteSerializer,
+)
 from app.i18n.service import (
     TranslationService,
     get_translation_service,
@@ -86,6 +92,11 @@ __all__ = [
     "get_translation_logger",
     "log_missing_translation",
     "log_translation_error",
+    # Serializers
+    "I18nResponseMixin",
+    "WorkspaceSerializer",
+    "WorkspaceMemberSerializer",
+    "WorkspaceInviteSerializer",
     # Exception classes
     "I18nException",
     "BadRequestError",

api/app/i18n/serializers.py

@@ -72,7 +72,9 @@ class I18nResponseMixin:
         Returns:
             添加了 _display 字段的字典
         """
-        from app.i18n.service import translation_service
+        from app.i18n.service import get_translation_service
+        
+        translation_service = get_translation_service()
         
         result = data.copy()