fix(admin): keep all batch-uploaded images when saving packages

Serialize multi-file uploads and reload package list after save so imageUrls persist.

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

apps/h5-partner/src/components/MultiOssUploadField.tsx

@@ -53,7 +53,9 @@ export default function MultiOssUploadField({
   }
 
   async function uploadFiles(files: File[]) {
-    const picked = files.slice(0, remaining);
+    const current = normalizeUrls(value);
+    const room = Math.max(0, maxCount - current.length);
+    const picked = files.slice(0, room);
     if (!picked.length) {
       showUploadError(`最多 ${maxCount} 张`);
       return;
@@ -68,7 +70,7 @@ export default function MultiOssUploadField({
         appended.push(result.url);
       }
       if (appended.length) {
-        onChange?.([...urls, ...appended]);
+        onChange?.([...current, ...appended]);
         toastSuccess(`已上传 ${appended.length} 张`);
       }
     } catch (e) {