* chore(core): point material catalog at KTX2 tiers for wood/flooring/roofing finishes All 48 remaining webp/jpg/png finish entries now reference _512.ktx2 maps and 256px _thumb.webp previews, matching the fabric/leather/concrete/metal convention. flipY set to false on the converted entries — compressed textures can't be flipped at upload. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix: stabilize room surfaces and wall openings * style(core): format KTX2 material catalog --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com>