diff --git a/api/app/services/conversation_service.py b/api/app/services/conversation_service.py
index 3bb51858..122d0d87 100644
--- a/api/app/services/conversation_service.py
+++ b/api/app/services/conversation_service.py
@@ -1,22 +1,17 @@
 """会话服务"""
 import uuid
-from typing import Optional, List, Tuple, Annotated
-
-from fastapi import Depends
-from sqlalchemy.orm import Session
-from sqlalchemy import select, desc
-
-from app.db import get_db
-from app.models import Conversation, Message
-from app.core.exceptions import ResourceNotFoundException, BusinessException
-from app.core.error_codes import BizCode
+from typing import Annotated
 from typing import Optional, List, Tuple
 
+from fastapi import Depends
 from sqlalchemy import select, desc
 from sqlalchemy.orm import Session
 
+from app.core.error_codes import BizCode
+from app.core.exceptions import BusinessException
 from app.core.exceptions import ResourceNotFoundException
 from app.core.logging_config import get_business_logger
+from app.db import get_db
 from app.models import Conversation, Message
 
 logger = get_business_logger()
diff --git a/api/app/services/workspace_service.py b/api/app/services/workspace_service.py
index c6b22cc9..34ce0610 100644
--- a/api/app/services/workspace_service.py
+++ b/api/app/services/workspace_service.py
@@ -5,39 +5,16 @@ import uuid
 from os import getenv
 from typing import List, Optional
 
-from sqlalchemy.orm import Session
-
 from app.core.config import settings
 from app.core.error_codes import BizCode
 from app.core.exceptions import BusinessException, PermissionDeniedException
 from app.core.logging_config import get_business_logger
 from app.models.user_model import User
 
-# 获取业务逻辑专用日志器
-business_logger = get_business_logger()
-from app.models.workspace_model import (
-    InviteStatus,
-    Workspace,
-    WorkspaceMember,
-    WorkspaceRole,
-)
-from app.repositories import workspace_repository
-from app.repositories.workspace_invite_repository import WorkspaceInviteRepository
 from app.schemas.workspace_schema import (
-    InviteAcceptRequest,
-    InviteValidateResponse,
-    WorkspaceCreate,
-    WorkspaceInviteCreate,
-    WorkspaceInviteResponse,
-    WorkspaceMemberUpdate,
     WorkspaceModelsUpdate,
-    WorkspaceUpdate,
 )
-from dotenv import load_dotenv
 from sqlalchemy.orm import Session
-
-# 获取业务逻辑专用日志器
-business_logger = get_business_logger()
 from app.models.workspace_model import Workspace, WorkspaceRole, InviteStatus, WorkspaceMember
 from app.repositories import workspace_repository
 from app.repositories.workspace_invite_repository import WorkspaceInviteRepository
@@ -347,7 +324,6 @@ def _check_workspace_admin_permission(db: Session, workspace_id: uuid.UUID, user
         )
 
     # 使用统一权限服务检查管理权限
-    from app.core.permissions import Action, Resource, Subject, permission_service
     from app.core.permissions import permission_service, Subject, Resource, Action
 
     # 获取用户的工作空间成员关系