Building with `ssr: false` doesn't seem to work

Thank you for this very useful plugin.

When I try to build a project with ssr: false, RSbuild still builds both client and server, and the client files don't seem to work on their own.

Here's a reproducible repo: https://github.com/dangmai/rr7-spa-rsbuild

There are 2 packages within it, one with Vite and one with RSbuild. Both are building the same project files, both with ssr: false in react-router-config.ts.

After the build, the Vite project contains a build/client directory with a clear index.html that can be deployed. Meanwhile, the RSbuild project contains both build/server and build/client, and the files in build/client don't seem to work on their own in the browser.

After some more research, I believe it's because RR7 in SPA Mode still requires to server render the root route, which is then read by the Vite plugin and flushed to disk as index.html. The implementation of that process starts here: https://github.com/remix-run/react-router/blob/2ac4f9b231d83ee391b94160021397161e5e586d/packages/react-router-dev/vite/plugin.ts#L1743

Hey folks! Is there any update on this one? Thanks!!