chore: 基础设施 — 阿里云源、北京时间、HEX计数器、打印机配置

backend/app/core/security.py

@@ -1,8 +1,9 @@
 """安全模块 — JWT Token 生成与验证"""
-from datetime import datetime, timedelta, timezone
+from datetime import timedelta
 from jose import JWTError, jwt
 from passlib.context import CryptContext
 from app.core.config import settings
+from app.core.time_utils import get_beijing_time
 
 pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
 
@@ -12,7 +13,7 @@ ALGORITHM = "HS256"
 def create_access_token(data: dict, expires_delta: timedelta | None = None) -> str:
     """生成 JWT Access Token"""
     to_encode = data.copy()
-    expire = datetime.now(timezone.utc) + (
+    expire = get_beijing_time() + (
         expires_delta or timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
     )
     to_encode.update({"exp": expire})

backend/app/core/time_utils.py

@@ -0,0 +1,10 @@
+"""全局北京时间 (UTC+8)"""
+from datetime import datetime
+from zoneinfo import ZoneInfo
+
+BEIJING_TZ = ZoneInfo("Asia/Shanghai")
+
+
+def get_beijing_time() -> datetime:
+    """返回当前北京时间"""
+    return datetime.now(BEIJING_TZ)