执行 Ruff 安全自动修复

web/backend/security.py

@@ -3,10 +3,10 @@
 import os
 import secrets
 import warnings
-from datetime import datetime, timedelta, timezone
-from typing import Optional
+from datetime import UTC, datetime, timedelta
+
 import bcrypt
-from jose import jwt, JWTError
+from jose import JWTError, jwt
 
 # JWT 密钥：生产环境必须通过环境变量 JWT_SECRET_KEY 设置
 SECRET_KEY = os.getenv("JWT_SECRET_KEY")
@@ -41,12 +41,12 @@ def create_access_token(
     data: dict, expires_hours: int = ACCESS_TOKEN_EXPIRE_HOURS
 ) -> str:
     to_encode = data.copy()
-    expire = datetime.now(timezone.utc) + timedelta(hours=expires_hours)
+    expire = datetime.now(UTC) + timedelta(hours=expires_hours)
     to_encode.update({"exp": expire})
     return jwt.encode(to_encode, SECRET_KEY_TYPED, algorithm=ALGORITHM)
 
 
-def decode_access_token(token: str) -> Optional[dict]:
+def decode_access_token(token: str) -> dict | None:
     try:
         return jwt.decode(token, SECRET_KEY_TYPED, algorithms=[ALGORITHM])
     except JWTError: