- Remove unreliable Box3.setFromObject scaling (broke for skinned meshes,
control rigs, and scene-containing GLBs)
- Use measured vertex extents (scripts/measure-models.mjs) as modelLength
- Clownfish: hide Surface/TopLight/Bubbles/Mirrored nodes (GLB is a full
scene, not just a fish) — eliminates the white box + giant fish bug
- All 10 species now have accurate scale factors
