- dashboard.html: node-centric layout — GPU cards with VRAM bars and
sparklines, active leases table with TTL progress bars, service health
pill, auto-refreshes every 5s via fetch() against the local JSON API
- All dynamic content set via DOM textContent / createElementNS — no
innerHTML with user-sourced strings
- coordinator/app.py: serves dashboard.html at GET / (HTMLResponse,
excluded from OpenAPI schema); HTML read at import time from package dir
- test_dashboard_serves_html: verifies 200, content-type text/html,
and key route markers present
