Which project does this relate to?

Router

Describe the bug

Since that version, basepath has been replaced with the rewrite method, and it seems that the rewrite logic has been applied to basepath for backward compatibility with previous versions.

When basepath is configured the same way as in earlier versions, accessing without a basepath (e.g., http://localhost:3000) does not add the basepath to the browser URL.

Your Example Website or App

https://stackblitz.com/edit/github-lebazlff?file=src%2Froutes%2F__root.tsx

Steps to Reproduce the Bug or Issue

1. check window.location.pathname in /home
2. click about
3. check window.location.pathname in /about

Expected behavior

window.location.pathname in home should be /app

Screenshots or Videos

No response

Platform

• Router / Start Version: [e.g. 1.121.0]
• OS: [e.g. macOS, Windows, Linux]
• Browser: [e.g. Chrome, Safari, Firefox]
• Browser Version: [e.g. 91.1]
• Bundler: [e.g. vite]
• Bundler Version: [e.g. 7.0.0]

Additional context

No response