router-plugin versions 1.150.0 and later generate routeTree.gen.ts with type declaration errors

Which project does this relate to?

Router

Describe the bug

The routeTree.gen.ts generated in versions after @tanstack/router-plugin 1.150.0 is inconsistent with version 1.150.0. I created a test path, and the following code was normal in version 1.150.0, passed the TypeScript check, but in subsequent versions, this code still works normally, but the TypeScript check reports an error.

  const router = useRouter();
  React.useEffect(() => {
    console.log(router.routesByPath['/test']);
  }, [router]);

Complete minimal reproducer

https://stackblitz.com/edit/github-shjftka4?file=src%2Froutes%2F__root.tsx

Steps to Reproduce the Bug

1. Change "@tanstack/router-plugin": "1.150.0" in package.json to 1.151.0 or any other new version

Expected behavior

Screenshots or Videos

No response

Platform

• Router Version: [e.g. 1.151.0 ]
• OS: [e.g. macOS]
• Browser: [e.g. Chrome]
• Browser Version: [e.g. 91.1]
• Bundler: [e.g. vite]
• Bundler Version: [e.g. 7.0.0]

Additional context

No response

Open the linked StackBlitz reproducer and compare routeTree.gen.ts generated with @tanstack/router-plugin 1.150.0 versus 1.151.0 or later. Start with the generated declarations used by router.routesByPath['/test'], then run the TypeScript check to identify the reported error. Done means the generated route tree has compatible declarations and the reproducer passes the TypeScript check on newer plugin versions.