Phase 1 proof-of-life

Autographs is up and ready for the delivery spine.

This landing page is intentionally narrow. It proves the Next.js app scaffold exists, renders through the App Router, and exposes a stable health surface before gallery, admin, Oracle, or object-storage work begins.

App routerLayout and page entrypoints are in place under `app/app`.
Health routeMachine checks can call /health for a stable JSON success response.
Response contract{"ok":true,"service":"autographs","scope":"proof-of-life"}