Fix health check fake request state binding

app/account.py

@@ -1,5 +1,6 @@
 import logging
 import random
+from types import SimpleNamespace
 
 from curl_cffi import requests
 from fastapi import HTTPException, Request
@@ -254,12 +255,13 @@ def account_health_check(account, timeout=30):
             ensure_hif_tokens(account)
 
         # 2. 创建会话 —— 需要伪造一个 request 对象
-        class _FakeRequest:
-            class state:
-                deepseek_token = account.get("token")
-                account = account
-                use_config_token = True
-        fake_req = _FakeRequest()
+        fake_req = SimpleNamespace(
+            state=SimpleNamespace(
+                deepseek_token=account.get("token"),
+                account=account,
+                use_config_token=True,
+            )
+        )
 
         session_id = create_session(fake_req)
         if not session_id: