执行 Ruff 安全自动修复

web/backend/services/account_check_service.py

@@ -8,9 +8,9 @@ import uuid
 import zipfile
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from dataclasses import dataclass, field
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from types import SimpleNamespace
-from typing import Optional, cast
+from typing import cast
 
 from core.douyu import DouyuLogin, WgapiLoginAPI
 from core.douyu.login import AccountLike
@@ -21,7 +21,7 @@ from ..models import ProxyConfig as ProxyConfigModel
 
 def _now() -> datetime:
     """返回时区感知 UTC 时间。"""
-    return datetime.now(timezone.utc)
+    return datetime.now(UTC)
 
 
 STATUS_LABELS = {
@@ -139,7 +139,7 @@ class AccountCheckRunner:
         self,
         batch: AccountCheckBatch,
         accounts: list[AccountCheckInput],
-        proxy_config: Optional[ProxyConfigModel] = None,
+        proxy_config: ProxyConfigModel | None = None,
     ):
         self.batch = batch
         self.accounts = accounts
@@ -394,7 +394,7 @@ class AccountCheckRegistry:
         max_login_retries: int,
         max_total_time: float,
         use_proxy: bool = False,
-        proxy_config: Optional[ProxyConfigModel] = None,
+        proxy_config: ProxyConfigModel | None = None,
     ) -> AccountCheckRunner:
         batch_id = uuid.uuid4().hex[:12]
         normalized_retries = max_login_retries if max_login_retries > 0 else 20