A tool-driven inventory overlay — a three.js rack you cycle with ◀ ▶ and
open with USE. Registry-based (not tied to a level type) so new tools just
add a model + component. Reuses the phone's 3D model; notebook is a blocky
placeholder tool. Dev route /?inventory=1; drop <Inventory/> into the navbar
after the merges.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
