User reported a flood of chimes when opening Tx OS while several
notifications were pending. Two complementary fixes:
1. Player throttle bumped from 600 ms → 3000 ms in
artifacts/tx-os/src/lib/notification-sounds.ts. Bursts of real-time
events now produce a single chime instead of several overlapping ones.
2. Socket warmup gate added in
artifacts/tx-os/src/hooks/use-notifications-socket.ts:
- Track connectedAtRef (useRef<number>), set on effect mount and on
each socket "connect" event using performance.now().
- In the notification_created handler, after mute / per-channel
gates but before notificationPlayer.play(...), suppress
audio + vibration when within the 3 s warmup window.
- UI/badge invalidation still runs — only sound is silenced during
the warmup, so the user sees notifications appear without an
alarm-like welcome.
All existing gates preserved (global mute, per-channel sound/vibration,
autoplay-blocked toast hint, per-meeting playedRef dedupe).
No deviations. tx-os typecheck passes.
riyadhafraa
292959248d