- A non-null pin forces layout "spotlight" and remembers the displaced mode; clearing restores it only if the user hasn't switched since; gridLayoutMedia$ surfaces the pinned item for narrow mode (#3). - Pin clears when the user is gone for 5 s or on leave$ (#16). - Screenshare branch keeps pip$ = auto speaker unless it IS the pinned user (#29). - Payload accepts an optional media id (userId:deviceId) and prefers it; userId-only picks the speaking device (#30). 18 unit tests. Fixes #3 Fixes #16 Fixes #29 Fixes #30 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA