SmileLulz/SmileMPlayer ? reverse-engineered prompt

Build me a simple, modern local music player for Linux desktops, with Windows support too.

I want it to feel playlist focused, so folders can be used like playlists, with easy track sorting, album art, basic playback controls, volume, and a clean Material You style interface by default. It should support LRC sidecar lyrics, ReplayGain 2.0, and MPRIS integration so media keys and desktop controls work properly. The UI should be customizable and themeable, but still look polished out of the box.

Please make it easy to run from source and keep the app lightweight and friendly for people who just want to point it at their music library and play it. If you need to check any current docs or best practices for the UI stack, look them up online and follow the project’s existing direction.