- Replace createEventBatcher with createDomainEventBatcher in App.tsx
- Add handleGranularBatch for task, run, approval, agent, and budget events
- Task/run/approval events trigger targeted IPC fetch and Zustand patch
- Run completion and budget changes trigger full refresh (cross-entity)
- Failed entity fetches fall back to removeTask or full refresh
- Unknown event types trigger full refresh (PERF-03 safety)
- Sidebar badges refresh after every successful granular batch
- Add 12 integration tests for handleGranularBatch in selective-ipc.test.ts
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>