* Replace placeholder /remote/qr SVG (URL drawn as text) with real QR
rendered via the qrcode package; add format=terminal returning ASCII
QR for the TUI.
* Resolve the public tailscale funnel URL from captured CLI output
instead of constructing http://<hostname>:<port> from a configured
hostname label — that label was never used by `tailscale funnel` and
produced a non-public URL in the auth/QR link.
* Drop hostname requirement from engine + UI; only target port matters.
* Tighten tailscale parseReadiness to require a URL on the matched line
so the tunnel manager doesn't lock in `running` before the URL line.
* TUI: poll remote status, show ● tunnel indicator + URL in MainHeader,
bind Ctrl+Q to a global QR overlay (terminal ASCII), and switch the
in-Settings K shortcut to render the same ASCII QR.
* Auto-poll remote status in the dashboard while in `starting`/`stopping`
so the UI flips to running without reopening the modal.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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