feat: live system dashboard with real-time API data
- status/route.ts: add command-center + agents-api fetches alongside existing health checks
- page.tsx: replace landing page with live infrastructure dashboard
- Platform metrics (agents, orgs, repos, CF workers, health score)
- Service health grid with latency and status indicators
- Agent roster cards with skills, tasks, uptime
- Pi fleet status (octavia, lucidia, alice, cecilia nodes)
- Auto-refreshes every 30s with live countdown
- Brand colors: amber #F5A623, hot-pink #FF1D6C, violet #9C27B0, electric-blue #2979FF
- Dark #000 background
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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