The first cut named the upload chat-<epoch>.png; presigned-url turns the prefix before '-' into the storage folder, so it landed in /chat/ with a non-timestamp slug that get.painting(slug).by(handle) can't resolve (no inline preview). Match uploadPainting's painting-<num.timestamp()>.png convention. Also: inserting the #code appended to the TextInput's '...' call-to-action, producing '... #code' messages — treat '...' as empty.