- game/assets/store/{rack,crate,record}.glb from the 3D-STORE library
- _glb_piece(): instances a GLB as a Smashable's visual, auto-fits a box
collider to the mesh AABB, and drops it flush to the floor (no hardcoded dims)
- _build_rack now assembles two smashable racks + crates of records on the floor
- cascade preserved: smashing a crate spills the records stacked on it
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
