Sharp-ML/SHARP-ML ? reverse-engineered prompt

Build me a web app called SHARP 3D that lets people turn a photo into an interactive 3D scene.

I want someone to be able to sign in with Google, upload a PNG, JPG, or WebP, then wait while the image is processed and shown as a smooth 3D Gaussian splat they can rotate, zoom, and pan in the browser. It should have a clean landing page, an upload area, a clear processing status, and a shareable link for each finished scene.

Please include a simple account system, a database for users and their scenes, and a payment upgrade flow after a free usage limit so people can keep generating more scenes. Use a modern polished design, make it feel fast and friendly, and wire it up so the image processing happens through a separate backend endpoint. If you need current docs for any of the services, look them up online first.