A small red dot on a space tab when any room in that space (recursively)
has an active MatrixRTC session, so a live call is visible even when you
are looking at a different space or your DMs. Hidden while the space is
selected — the room list already shows the Live badge there.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
