chrisjz/universe ? reverse-engineered prompt

Build me a browser app that lets you zoom continuously from the scale of the observable universe all the way down to a proton, with no scene cuts or loading between levels.

I want it to feel like one endless scroll where the camera automatically hands off from galaxies to solar systems to Earth to a picnic blanket on the Chicago lakefront, then deeper into atoms and inside a proton. Include a guided tour mode I can trigger with a key, plus basic controls for scroll to zoom, click to focus, double click to fly to something, and drag to orbit or roam on Earth.

Make the experience look polished and educational, with real looking stars, planets, terrain, and a clear sense of what is real versus stylized. If it helps, use current docs online for WebGPU or any tricky browser API details. The whole thing should run smoothly in the browser and feel like a single continuous atlas of the universe.