A cache diagnostics rack where every key-group is a storage-heater brick holding heat: a hit charges it toward full glyph-density stipple, idle time cools it on a decay matched to its own TTL, and a real eviction contracts the rack by exactly one slot. Keys hit over and over flicker cold-hot instead of settling: the visual signature of a thrashing cache.
pnpm dlx shadcn@latest add "https://design.helpmarq.com/r/night-store.json"