[Epic] LR-3 · Calling & Element Call Maturity

[Deniel9204]

Bring VoIP from working-1:1 to a robust group-calling experience on the Element Call/LiveKit path: screen-share audio, video entry points, group calls, ringing, stats, and crash hardening.

Why it's long-running: Two parallel call stacks (legacy WebRTC + LiveKit/MatrixRTC) must converge; group calling, E2EE call setup, ringing, stats, and screenshare-with-audio each require protocol-level work (MSC4143/3401/4140) plus cross-platform media plumbing and low-end performance tuning.

Tracked issues

• VoIP crashes on TURN-less servers (e.g. Tchap) #24 — VoIP crashes on TURN-less servers (e.g. Tchap)
• Add a video-call entry point in the UI #25 — Add a video-call entry point in the UI
• Element Call screen-share with audio #26 — Element Call screen-share with audio
• Per-source audio / mic-gain controls; hide non-video sources; fullscreen stream #27 — Per-source audio / mic-gain controls; hide non-video sources; fullscreen stream
• Screen-share dialog bugs: KDE duplicates, Android not fullscreen #28 — Screen-share dialog bugs: KDE duplicates, Android not fullscreen
• Converge call stacks; add ringing/accept-decline and call stats #29 — Converge call stacks; add ringing/accept-decline and call stats
• Human-readable call timeline events; revive or remove the screen-share annotation feature

Related (tracked under other epics)

• Video playback options (speed/quality/PiP); slow start #31 — Video playback options (speed/quality/PiP); slow start
• App-wide animation stutter on Android #71 — App-wide animation stutter on Android
• Slow media playback; downloaded media not instant #72 — Slow media playback; downloaded media not instant

_{Epic LR-3 · area: voip · auto-generated from ROADMAP.md §5.}