WebSocket Multi-Tab Awareness — pyrite

Real-time change notifications across browser tabs:

Backend:

`WS /ws` endpoint for change notifications

`ConnectionManager` class in `websocket.py` — tracks sessions, broadcasts events

CRUD endpoints call `manager.notify_change()` after mutations

Events: entry created, updated, deleted, KB synced

Frontend:

`websocket.ts` client — connects on app init, auto-reconnect with backoff

Dispatches events to Svelte stores

Toast notifications when other tabs modify entries

Stores auto-refresh stale data

Not collaborative editing — just awareness notifications for the same user across tabs.

WebSocket Multi-Tab Awarenessbacklog_item