fix: 完全回滚公告轮播身份校验代码，恢复改前行为

Co-authored-by: Cursor <cursoragent@cursor.com>

config/views.py

@@ -151,7 +151,8 @@ class ShangpinGonggaoView(APIView):
     """
     throttle_classes = [AnonRateThrottle]
     permission_classes = [AllowAny]
-    authentication_classes = []  # 不校验 JWT，避免前端带过期 token 时 401
+    authentication_classes = []
+
     def post(self, request):
         """
         处理POST请求，返回公告和轮播图数据