Replace unprivileged LXC/XFCE/Chromium setup with privileged LXC, LXQt
desktop, and Google Chrome to support the OpenClaw browser extension
(developer mode). Removes --no-sandbox workaround and XFCE desktop icon
trust mechanism, adds Chrome .deb install and browser extension setup.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
