FileHeatmap component is fully integrated into main TUI app:
- Keyboard shortcut 'H' toggles heatmap view
- Real-time file access aggregation from event store
- Shows most-touched files with multiple sort modes
- All tests passing (943 tests, including 130 FileHeatmap tests)
Additional fixes:
- Fixed ErrorGroupPanel options to support bottom property
- Added vitest globals configuration for proper TypeScript support
- Fixed type assertions in server.test.ts
- Created comprehensive integration documentation
Co-Authored-By: Claude Worker <noreply@anthropic.com>
