The world-model spatial surface: author a space, view the living twin, grant access against it, and watch perception live. The appliance senses and models — this is where the model is drawn, inspected and governed.
Skeleton. Both surfaces below are the recovered 2026-08-18 directional mockups,
seeded here unchanged. They render their own sample state and are not wired to the hub
API — every /api/ route on this server other than health and version
answers 501 "not yet" on purpose.