`$fetch` infered type for `Date` is wrong

[offizium-berndstorath]

Environment

Node v20.15.0

Reproduction

https://github.com/offizium-berndstorath/nitro-repro https://stackblitz.com/~/github.com/offizium-berndstorath/nitro-repro?file=server/utils/test.ts

Describe the bug

If you return a Date from a api route the type doesn't get converted to string. But only if its inside an array

Additional context

https://github.com/nuxt/nuxt/issues/28674

Logs

No response

[kaaax0815]

@danielroe @pi0 any update?

[pi0]

Lets track with https://github.com/nitrojs/nitro/issues/2758