On the internal error page and the feedback page, "Download report.txt"
was an <a> without href, so Tab skipped it. It is an action, so it becomes
a <button type="button"> with the same look, underline on hover included.
The type keeps it from sending the feedback form.
A new visual test reaches both pages through a mocked server error and
checks 0 px of difference and the download with Enter.
AI-assisted-by: claude-opus-5-5