fix download filename in unable-to-sync modal error message (#36113)

GitOrigin-RevId: fdc891962b24a096a1d54a73fcb0d7af6d504729

services/web/frontend/js/features/ide-react/components/modals/unable-to-sync-modal.tsx

@@ -83,7 +83,7 @@ function UnableToSyncModal({
 
   const handleDownload = useCallback(() => {
     sendMB('unable-to-sync-modal-click', { action: 'download' })
-    downloadFileContent(targetContent, docName ?? 'document.txt')
+    downloadFileContent(targetContent, docName || 'document.txt')
   }, [targetContent, docName])
 
   const handleSaveAsNewFile = useCallback(async () => {

services/web/frontend/js/features/ide-react/context/editor-manager-context.tsx

@@ -645,12 +645,19 @@ export const EditorManagerProvider: FC<React.PropsWithChildren> = ({
 
   useEffect(() => {
     const handleUnableToSync = ({
-      detail: [{ editorContent, baseContent, docName, reloadAfterClose }],
+      detail: [
+        { docId, editorContent, baseContent, docName, reloadAfterClose },
+      ],
     }: CustomEvent<IdeEvents['ide:unableToSyncOfflineChanges']>) => {
+      const resolvedDocName =
+        docName ||
+        (fileTreeDataRef.current &&
+          findDocEntityById(fileTreeDataRef.current, docId)?.name) ||
+        null
       showUnableToSyncModal({
         baseContent,
         targetContent: editorContent,
-        docName,
+        docName: resolvedDocName,
         rootFolderId: fileTreeDataRef.current?._id,
         reloadAfterClose,
       })