When pair-agent detects headless mode, it auto-switches to headed
(visible Chromium window) so the user can watch what the remote
agent does. Use --headless to skip this. Fixed compiled binary
path resolution (process.execPath, not process.argv[1] which is
virtual /$bunfs/ in Bun compiled binaries).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>