2.1.2

Fixes active-user tracking after closing a tab, a delayed heartbeat alarm, and a background-initialization race.

Bug fixes

• Fixed active-user tracking: the extension could keep reporting 0 active users on a presence's page even while it was genuinely active, because the background service worker's in-memory state was lost every time Chrome/Firefox evicted it (a routine MV3 behavior). Active-presence tracking now survives service worker restarts.
• Fixed the periodic heartbeat alarm being perpetually delayed under continuous activity, sometimes preventing it from ever firing.
• Closing a tab now correctly stops reporting its presence as active (previously it could stay "active" server-side indefinitely).
• Fixed a race where a fresh browser start or extension install/update could run background initialization twice concurrently.
• Minor reliability improvements to presence enable/disable/uninstall and update checks.