feat(app):

1. Add new functional features to the agent;
2. Enhance the voice output;
3. Modify the end_user binding;
4. Delete and modify the tools.

api/app/db.py

@@ -16,7 +16,7 @@ engine = create_engine(
     pool_recycle=settings.DB_POOL_RECYCLE,
     pool_timeout=settings.DB_POOL_TIMEOUT,
     connect_args={
-        "options": "-c timezone=Asia/Shanghai -c statement_timeout=60000"
+        "options": "-c timezone=UTC -c statement_timeout=60000"
     },
 )
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)