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- Demo mode toggle: admin can enable public access without login - Demo users can view/run everything but cannot modify admin settings - Admin write routes (config saves, API keys) blocked for non-admins in demo - IP allowlist: LAN (192.168.1.*) and localhost never rate-limited - Admin panel gets Security tab: demo toggle, allowlist management - Main UI shows "Demo ON" button (green) + top banner when active - Demo mode state is in-memory, resets on restart (safe default) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>