JG-Jdiem/JayTune ? reverse-engineered prompt

Build me an Android music app called JayTune that feels fast, lightweight, and polished. I want users to be able to search and play songs, albums, artists, videos, and playlists from YouTube Music, and also play music from their own device. It should keep playing in the background, let people cache songs for offline listening, and support importing playlists from YouTube and Spotify.

Please include a nice now playing experience, lyrics and synced lyrics when available, local playlist management, audio normalization, and a customizable look with dynamic theming and Material You style colors. It should also handle opening YouTube and YouTube Music links directly in the app, and work well with Android Auto for listening in the car.

Make it feel smooth, modern, and simple to use, with a clean UI and good performance. If you need to check any current docs or APIs, look them up online first.