Scribus 1.5 --no-gui mode doesn't execute --python-script properly.
Remove the flag and let Scribus use the Xvfb display, which also
enables the runner to create the bridge socket.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The bridge's /start endpoint was returning "already running" even when
the runner script had crashed (socket gone). Now kills zombie Scribus
and restarts. Agent route also verifies runner connectivity after start.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>