zachwinter/kaleidosync ? reverse-engineered prompt

Build me a polished web app that turns Spotify music into a live WebGL visualizer.

I want users to connect their Spotify account, play a song, and see the visuals react in real time to the beat and sections of the track. It should feel smooth and modern, with a few different visualizer styles to choose from, plus a simple control panel for tweaking things like colors, motion, and intensity. Make it work well on desktop and mobile, and have it handle unsupported playback situations gracefully if the browser can’t use the best live sync method.

Use a clean Vue based frontend and lean on WebGL for the visuals, with the audio timing synced as accurately as possible. If you need to look up current Spotify docs online while building it, go ahead. I also want the app to remember user settings when they come back, and overall it should feel like a real music experience, not just a demo.