playcanvas/supersplat ? reverse-engineered prompt

Build me a browser based 3D Gaussian Splat editor like SuperSplat. I want users to open a splat file in the browser, inspect it in an interactive 3D view, edit it, optimize it, and publish or export the result without installing anything.

Make it feel like a real creative tool, not just a demo. It should have a clean editor interface, viewport controls, basic file loading, editing tools for selecting and adjusting splats, optimization options, and a clear way to save or publish the edited scene. Please include support for localization so the interface can be translated later, and make it easy to add new language files.

Use TypeScript and web graphics tech suitable for Gaussian splats. If you need exact file format details or current browser rendering best practices, look up current docs online. Set it up so I can run it locally with npm, open it in a browser, and keep developing it easily.