The copy button in Nuxt's error overlay fails because navigator.clipboard is undefined inside the data: URL iframe (opaque origin = not a secure context).

pnpm install
pnpm dev

Visit http://localhost:3000 → error overlay appears → click copy button → check console for error.

Nuxt's error overlay renders youch's error page inside a data: URL iframe. The data: URL has an opaque origin which is not considered a secure context, so navigator.clipboard is undefined.

See fix/nuxt-patch branch for a pnpm patch that fixes this via postMessage bridge.