Add comprehensive controller health monitoring functionality with
real-time visual indicators and auto-refresh capabilities.
Features:
- Health check API with 5-second timeout
- Latency tracking and version detection
- ControllerStatus component with color-coded indicators
- Auto-refresh with configurable intervals
- Integration with SettingsPage and SealingKeysView
Technical details:
- AbortController for proper timeout handling
- Never-fail API (always returns status)
- Three states: Healthy (green), Unhealthy (yellow), Unreachable (red)
- Detailed tooltips with error messages
- Response time display in milliseconds
- Version information from X-Controller-Version header
Files:
- src/lib/controller.ts: Add checkControllerHealth() (+58 lines)
- src/components/ControllerStatus.tsx: NEW component (+117 lines)
- src/components/SettingsPage.tsx: Add status display
- src/components/SealingKeysView.tsx: Add status to header
- PHASE_2.2_COMPLETE.md: Implementation documentation
Bundle size: 346.65 kB (95.49 kB gzipped), +2.7 kB (+0.8%)
Build time: 3.94s (improved!)
Zero TypeScript/lint errors
Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>
