fix: icon_key 无效时回传具体 key，并提示需更新接单池背景相关版本

便于定位是空 key 还是服务器未 pull/未重启导致 grab_card_* 未注册。

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

jituan/views_miniapp_assets.py

@@ -98,9 +98,20 @@ class ClubMiniappIconManageView(APIView):
 
         action = (request.data.get('action') or 'upload').strip()
         club_id = resolve_effective_club_id(request, request.user)
-        icon_key = (request.data.get('icon_key') or '').strip()
+        raw_key = request.data.get('icon_key')
+        if raw_key is None or raw_key == '':
+            raw_key = request.query_params.get('icon_key')
+        if isinstance(raw_key, (list, tuple)):
+            raw_key = raw_key[0] if raw_key else ''
+        icon_key = str(raw_key or '').strip()
         if icon_key not in MINIAPP_ICON_LABELS:
-            return Response({'code': 400, 'msg': 'icon_key 无效'})
+            return Response({
+                'code': 400,
+                'msg': (
+                    f'icon_key 无效: {icon_key or "(空)"}。'
+                    '若上传接单池卡背景，请确认 Django 已 pull 到含 grab_card_* 的提交并重启进程'
+                ),
+            })
 
         if action == 'save_meta':
             description = (request.data.get('description') or '').strip()