修复了商家客服登录身份标识问题

merchant_ops/services/authz.py

@@ -53,6 +53,15 @@ def assert_staff_perm(member, perm_code):
         raise StaffAuthError(403, f'无权限: {perm_code}')
 
 
+def staff_fields_for_login(user):
+    """登录/注册响应附带子客服身份（与 shangjiastatus 并列，互斥）。"""
+    ctx = resolve_staff_context(user)
+    return {
+        'staffstatus': 1 if ctx else 0,
+        'staff_context': ctx,
+    }
+
+
 def resolve_staff_context(user):
     """子客服上下文；非客服返回 None。"""
     member = get_active_staff_member(user)