Sleep mode

[lebaudantoine]

Bug Report

Problematic behavior
When a participant's device enters sleep mode (e.g., due to inactivity or power-saving settings), the frontend does not handle this properly. Upon waking the device, video and audio streams may freeze, fail to resume, or desynchronize from the room state. Other participants might see the affected participant as inactive or disconnected.

Expected behavior/code
Properly handle sleeping mode on all OS.