The requested feature to add a worker count badge to the TUI header
is already fully implemented in src/tui/app.ts via:
- getWorkerStats(): returns counts by status (active/idle/error)
- getHeaderContent(): builds badge with color-coded indicators
- updateHeader(): called in real-time via addEvent()
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
