This makes the Vite assets handling better, namely: - make it possible to include any vite assets in the templates - include the right `<link rel="preload">` tags for assets - include Subresource Integrity hashes - pre-compress assets and remove on-the-fly compression by the Rust server - build the CSS used by templates through Vite It also moves the React app from /app/ to /account/, and remove some of the old SSR account screens.