Covers the render both ways: the Tunnel row appears with its URL when a
tunnel is published, and is absent for an ordinary `fn dashboard` run.
Verified by mutation — deleting the row from app.tsx fails the first test.
Driving this through a real TTY proved impractical from a non-interactive
shell (isTTYAvailable needs stdin AND stdout to be TTYs, which neither
`docker exec -t` nor a detached `script` provides), so the render is pinned
here instead of by observation.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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