fix: improve maintenance and synchronize live conversations

backend/tests/api/test_session_to_agent.py

@@ -25,9 +25,9 @@ from app.models.session_to_agent import SessionToAgent, SessionStatus
 from app.models.chat_history import ChatHistory
 from app.models.agent import Agent, AgentType
 from app.models.customer import Customer
-from uuid import UUID, uuid4
+from uuid import uuid4
 from app.api import session_to_agent as session_to_agent_router
-from app.core.auth import get_current_user, require_permissions
+from app.core.auth import get_current_user
 from typing import Generator
 from datetime import datetime
 from app.models.schemas.chat import ChatDetailResponse, CustomerInfo, AgentInfo, Message