resurrectdev1/Flac-R — reverse-engineered prompt

Build me a simple Android app for cleaning up the tags in my local music library. I want it to work fully offline and only touch files on the device, no accounts, no cloud stuff, no tracking. The app should let me pick a music folder, browse my audio files, open a track and edit common metadata like title, artist, album, genre, and track number, then save the changes back to the file.

It should support the usual formats people keep locally, like mp3, flac, m4a, ogg, and aac. I also want batch editing so I can update multiple songs at once, even if they are different file types. Please include album art tools so I can view, replace, embed, or extract cover art. Keep the design clean and minimal, with a modern Android look and dynamic colors where available.

This should feel fast and straightforward for organizing a big offline collection. If you need details, look up current Flutter and Android docs.