watsonbox/exportify — reverse-engineered prompt

Build me a simple web app like Exportify for Spotify playlist backups. I want people to sign in with Spotify, give read only access to their playlists, then see their playlists in a clean list where they can export one playlist to CSV or export everything as a zip of CSV files. The CSV should include the usual track, artist, album, release date, image, duration, popularity, added by, and added at fields, and there should be easy options to also include album info, artist genres, and audio feature data.

Please make it work fully in the browser with no user data saved on a server. Add playlist search with support for filters like public true or false, collaborative true or false, and owner me, plus a way to export the current search results. I also want dark mode, a mobile friendly layout, a quick help area, and language support for the same set of languages shown in the project. Please handle Spotify rate limits gracefully so big exports still feel reliable. Look up current Spotify docs if you need to.