MarkdownEditor and ui/start-confetti-button had no importers anywhere in the repo
and both carried a different product's content: MarkdownEditor hardcoded
https://app.pertento.ai/logo.png with alt="Pertento", and start-confetti-button
spoke about 'the experiment' and 'Draft/Created' statuses.
Translating either would have put feature words into ui.*, which D6 forbids —
a shared namespace may not name a feature.
todo/inputs-outside-forms named MarkdownEditor as deliberately-unwrapped, so that
entry is updated rather than left pointing at a deleted file.