a30636f817
When a background agent completes a Kanban task, the Desktop app now surfaces a native OS notification with the task summary and a one-click "Open Kanban" action. Rides the existing /events WebSocket (onEventsFrame in api.ts). A new module completion-notify.ts implements cursor-based per-board deduplication with baseline from GET /board, fail-closed on unknown baseline, and reconnection safety. The notification uses the existing host.notify() and host.navigate() SDK APIs. Files changed: - apps/desktop/src/plugins/kanban/api.ts (+8, -1) — wire completion-notify - apps/desktop/src/plugins/kanban/completion-notify.ts (+89, new) - apps/desktop/src/plugins/kanban/completion-notify.test.ts (+378, new) 19 targeted tests pass (0 fail).