fix(gateway): 补齐鉴权测试页并保持旧接口兼容

gateway/client_auth.py

@@ -10,7 +10,7 @@ import secrets
 import time
 from uuid import uuid4
 
-from fastapi import APIRouter, Security
+from fastapi import APIRouter, Depends, Security
 from fastapi.responses import JSONResponse
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
 from pydantic import BaseModel, Field
@@ -145,3 +145,11 @@ async def client_auth_error(credentials: HTTPAuthorizationCredentials | None = S
     if not _valid(credentials.credentials, secret, "access"):
         return _unauthorized("访问令牌无效或已过期")
     return None
+
+
+@router.get("/check", summary="验证当前访问令牌")
+async def check(auth_error=Depends(client_auth_error)):
+    """检查与 42、52、72 相同的 Bearer 令牌，无需提交图片。"""
+    if auth_error is not None:
+        return auth_error
+    return _response(0, "访问令牌有效")