NUber-dev/YTubic ? reverse-engineered prompt

Build me a fast desktop app for YouTube Music that runs on Windows, macOS, and Linux.

I want it to feel much quicker than the website, with instant navigation, smooth playback, and no constant loading screens. It should let people browse and search music, open artists, albums, playlists, likes, and their library, and sign in only if they want to. Please include a music player that can sit at the bottom of the app or on the right side, plus a small floating always on top player window.

Add synced lyrics when they are available, cover art that looks clean and sharp, and support for media keys and system media controls. It should also have a tray or menu bar icon, work as a single app window, and update itself automatically. If you need current docs or details for anything, look them up online.

Make the app polished, responsive, and ready for real daily use, with a modern dark friendly music app feel.