Ivorisnoob/Koda ? reverse-engineered prompt

Build me a modern Android app for music and video that feels polished and expressive, with a strong Material 3 look and smooth motion.

I want one app that can work as a music player by default, then switch into a video mode when I turn that on. It should stream from YouTube Music, support search, playback, queues, playlists, downloads, and a library, and it should still work even if I do not sign in. If I do connect my account, add personalized home content, watch history, comments, subscriptions, and real account actions where needed.

The app should look and feel native on Android 11 and up, use Kotlin and Compose, and have a clean, premium design throughout. Please include a nice home screen, search, player, library, and settings, plus a local taste profile so recommendations still make sense without login. If you need to check current docs or APIs, look them up online first.