fix(ui): storage size formatting, overdue queue items, and i18n fixes

- Add formatStorageSize helper in FileManagerModal to display storage
  in GB/MB instead of raw bytes
- Show "Overdue" label for queue items whose scheduled time has passed
  by more than 1 minute
- Fix missing "in" prefix for English inDays translation
- Fix swapped justNow/now translations in Italian locale
- Fix whitespace formatting for waiting key across all locales
- Add trailing newline to date.ts and date.test.ts

frontend/src/utils/date.ts

@@ -484,4 +484,4 @@ export function formatRelativeTime(
 
   // Older than 7 days
   return formatDateTime(dateStr, timeFormat);
-}
+}