看股功能更新

backend/app/models.py

@@ -16,7 +16,7 @@ from .db import Base
 
 
 def _utcnow() -> datetime:
-    # naive UTC，避免 SQLite 存储时区带来的麻烦
+    # naive UTC，统一存储避免时区带来的麻烦
     from datetime import timezone
     return datetime.now(timezone.utc).replace(tzinfo=None)