no redux

src/components/manifest/manifestConfig.js

@@ -341,10 +341,18 @@ export function collectFilesForUpload(attachments = [], { onlyNew = false } = {}
       }
     }
 
+    let thumbavif = null;
+    if (attachment.thumbnail) {
+      thumbavif = attachment.thumbnail.includes(',')
+        ? attachment.thumbnail.split(',')[1]
+        : attachment.thumbnail;
+    }
+
     files.push({
       file: fileToUpload,
       name: attachment.name || fileToUpload.name,
       mimetype: attachment.type || fileToUpload.type,
+      thumbavif,
     });
   }
   return files;
@@ -389,6 +397,10 @@ export async function buildManifestBody(
     const filesToUpload = collectFilesForUpload(form.attachments, { onlyNew: isUpdate });
     if (filesToUpload.length > 0) {
       const formData = new FormData();
+      body.filesMeta = filesToUpload.map((item) => ({
+        name: item.name,
+        thumbavif: item.thumbavif ?? null,
+      }));
       formData.append('data', JSON.stringify(body));
       for (const item of filesToUpload) {
         formData.append('files', item.file, item.name);