- Settings: UI test mode toggle generates simulated telemetry data (speed/RPM/gear/laps...)
- Simulated data broadcasts via WebSocket and forwards to downstream devices
- game_ports config: per-game independent port overrides (shown when unified port off)
- Settings UI: game port list with save button, hidden when unified port enabled
- Sidebar: switch game reads game_ports[gameId] fallback to default_port