Can't use ValidateLinkOptions inside createFileRoute

Which project does this relate to?

Router

Describe the bug

When trying to use the type ValidateLinkOptions or similar (like LinkProps) inside the loader of createFileRoute, I get the error

'loader' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.

This seems like a regression, because it worked fine in v1.130.12.

Your Example Website or App

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

Steps to Reproduce the Bug or Issue

Return something typed as ValidateLinkOptions inside a loader. You must have a route that accepts parameters, like /user/$userId.

Expected behavior

This shouldn't happen, as the return type of a loader shouldn't be related to the route names.

Screenshots or Videos

No response

Platform

• Router / Start Version: 1.136.14
• OS: Linux
• Browser: N/A
• Browser Version: N/A
• Bundler: rolldown-vite
• Bundler Version: 7.2.5

Additional context

I using this to declare breadcrumbs, maybe this particular problem can be solved in another way

Start with the StackBlitz reproduction in src/routes/index.tsx and the createFileRoute loader using ValidateLinkOptions or LinkProps. Compare behavior between v1.130.12 and v1.136.14, then trace the route-parameter-dependent type relationship. Done when the reproduction no longer reports the implicit-any error for a loader returning a value typed with these link options.