spotbye/SpotiFLAC ? reverse-engineered prompt

Build me a desktop app for Windows, Mac, and Linux that lets me download music in high-quality, lossless FLAC format. The main idea is that I can paste a link from Spotify—for a track, album, or playlist—and the app will download the music for me.

It's important that the app doesn't require any user accounts or subscriptions. It shouldn't connect to my Spotify account at all. Instead of getting the audio from Spotify, it should find the same tracks on other services that offer high-fidelity audio, like Tidal, Qobuz, or Amazon Music, and download the true FLAC files from there.

The user interface should be super simple and clean: just an input box to paste the Spotify URL and a way to see the download progress and the final files.