- Align local mutation dedupe keys with live event keys so the same
action doesn't produce two toasts (local success + live event)
- Add per-type cooldown gate (max 3 toasts per category in 10s) to
suppress rapid-fire events from chatty sources
- Suppress all live-event toasts for 2s after WebSocket reconnect to
avoid burst floods from cached server events
- TTL tuning by severity already applied externally (info=4s,
success=3.5s, warn=8s, error=10s)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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