chore(e2e): Pin to react-router 7.10.1 in spa e2e test

[github-actions]

Note

The pull request "chore(e2e): Pin to react-router 7.10.1 in spa e2e test" was created by @andreiborza but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

The newly released React Router 7.11.0 introduced vite preview support(remix-run/react-router#14507). This change has a bug that affects SPA mode (ssr: false).

When building in SPA mode, React Router correctly builds the server bundle (build/server/index.js) and then removes it with the message Removing the server build... due to ssr:false.

The new vite preview implementation doesn't account for this removal and attempts to import the deleted build/server/index.js file when starting the preview server, causing:

Cannot find module '/build/server/index.js'

[linear]

JS-1326

[github-actions]

A PR closing this issue has just been released 🚀

This issue was referenced by PR #18548, which was included in the 10.32.0 release.