s-codes14/30sekify ? reverse-engineered prompt

Build me a Spotify style music app called 30sekify that looks and feels like a clean desktop clone of Spotify.

It should use Spotify data to show songs and artists, then let me click a track and play a 30 second preview snippet. I want a polished music browsing experience with a sidebar, search, featured sections, and a player at the bottom with play and pause controls, track info, and progress display.

Make it feel smooth and modern, with the same kind of dark music app vibe people expect from Spotify. Since this is meant to run as a desktop app too, please include the Electron setup so it works nicely in a desktop window.

The app does not need to be responsive right now, so focus on getting the desktop version looking good and working reliably. If you need to check the latest Spotify API or Electron docs online, go ahead and do that.