Add last_data_time_shared timestamp updated in all three Vuer event
handlers (CAMERA_MOVE, HAND_MOVE, CONTROLLER_MOVE). Exposes
last_data_time property for the main teleop loop to detect VP
connection freshness (connected if data received within 1 second).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
visionOS Safari doesn't support immersive-ar WebXR sessions. Pass-through
on Vision Pro requires immersive-vr with a transparent scene background.
When display_mode is pass-through, pass background=none query param to Vuer
client, which (with corresponding JS patch) skips the opaque scene background.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Joe DiPrima
silencht
Lizhi Yang