I've been looking for a tool that takes an actual existing HTML/CSS/JS project and converts it into a modern Vite + React setup.

Not Figma React (there are funded startups for that).

Not screenshot HTML (tools exist for that too).

I mean: you have an HTML site with CSS and vanilla JS, and you want a proper Vite + React project out of it. The closest things I've found are syntax converters they handle class className but don't touch component structure, JS logic, or project scaffolding.