Implements Picture-in-Picture functionality for the Electron wrapper to maintain video engagement when users are not actively focused on the conference window. This feature addresses the need to keep users visually connected to the conference even when multitasking.
Key features:
- Automatic PiP mode activation and deactivation based on user interaction
- Displays large video participant's stream or renders their avatar on canvas when video unavailable
- Provides audio/video mute controls via MediaSession API directly in PiP window
- Adds API events (_pip-requested) for Electron wrapper integration
Implementation includes new pip feature module with Redux architecture, canvas-based avatar rendering with custom backgrounds support, and integration with existing mute/unmute logic. Depends on jitsi-meet-electron-sdk#479 for proper user gesture handling in Electron.
Replaces hard-coded pixel values with relative rem units across UI components to improve typography responsiveness and maintainability.
Co-authored-by: Hristo Terezov <hristo@jitsi.org>
