fix: kefu permissions use legacy permission table instead of gvsdsdk

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

jituan/services/admin_context.py

@@ -101,6 +101,22 @@ def is_system_super_admin(user):
     )
 
 
+def is_kefu_backend_account(user):
+    """可登录客服后台：超管 / UserType=kefu / KefuProfile / 旧表 user_role 有绑定。"""
+    if is_system_super_admin(user):
+        return True
+    if getattr(user, 'UserType', '') == 'kefu':
+        return True
+    try:
+        kefu = user.KefuProfile
+        if kefu.zhuangtai == 1:
+            return True
+    except Exception:
+        pass
+    from backend.utils import has_legacy_backend_binding
+    return has_legacy_backend_binding(user)
+
+
 def can_manage_admin_assignments(user, permissions=None):
     """是否可维护数据范围任职、俱乐部密钥等集团级配置（不含俱乐部 000001）。"""
     if is_system_super_admin(user):