fix: improve maintenance and synchronize live conversations

backend/app/api/ai_setup.py

@@ -16,11 +16,10 @@ limitations under the License.
 
 import traceback
 from fastapi import APIRouter, Depends, HTTPException, status
-from app.core import config
 from app.core.logger import get_logger
 from app.database import get_db
 from app.models.user import User
-from app.core.auth import get_current_user, require_permissions
+from app.core.auth import require_permissions
 from app.repositories.ai_config import AIConfigRepository
 from app.agents.chat_agent import ChatAgent
 from app.core.security import decrypt_api_key