fix: 未上传的配置型大背景后台列表不再返回假默认图

避免图标管理预览 404，并明确 is_uploaded 状态，方便前端展示上传按钮。

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

jituan/views_miniapp_assets.py

@@ -12,6 +12,7 @@ from jituan.services.club_context import resolve_effective_club_id
 from jituan.services.display_config import forbid_display_write_in_all_scope, list_response_meta
 from jituan.services.miniapp_assets import (
     ICON_FOLDER,
+    CONFIG_ONLY_DELIVERY_KEYS,
     MINIAPP_ICON_LABELS,
     MINIAPP_ICON_META,
     POSTER_FOLDER,
@@ -49,13 +50,21 @@ class ClubMiniappIconListView(APIView):
         items = []
         for key, label in MINIAPP_ICON_META:
             row = icons_db.get(key)
+            uploaded = bool(row and row.is_uploaded and (row.image_path or '').strip())
+            if uploaded:
+                image_path = row.image_path.strip()
+            elif key in CONFIG_ONLY_DELIVERY_KEYS:
+                # 未上传的大背景不回默认路径，避免后台预览 404、误以为已配置
+                image_path = ''
+            else:
+                image_path = (row.image_path if row else '') or default_icon_path(key)
             items.append({
                 'icon_key': key,
                 'label': label,
-                'image_path': (row.image_path if row else '') or default_icon_path(key),
+                'image_path': image_path,
                 'description': (row.description if row else '') or '',
                 'is_active': row.is_active if row else True,
-                'is_uploaded': row.is_uploaded if row else False,
+                'is_uploaded': uploaded,
                 'id': row.id if row else None,
             })
         return Response({