fix: improve maintenance and synchronize live conversations

backend/tests/api/test_widget_chat_enhanced.py

@@ -20,7 +20,6 @@ from app.models.widget import Widget
 from app.models.agent import Agent, AgentType
 from app.models.ai_config import AIConfig, AIModelType
 from app.models.customer import Customer
-from app.models.user import User
 from app.models.workflow import Workflow, WorkflowStatus
 from app.models.session_to_agent import SessionToAgent, SessionStatus
 
@@ -30,7 +29,7 @@ from app.repositories.session_to_agent import SessionToAgentRepository
 from app.repositories.chat import ChatRepository
 from app.models.schemas.widget import WidgetCreate
 from app.core.security import encrypt_api_key
-from uuid import UUID, uuid4
+from uuid import uuid4
 from datetime import datetime, timezone