Wave 3: Fix render visibility issues across 5 files
Model cleanups and fixes, most of the loaner building is fixed (save hair)
Wave 2: Restore grp_* collections, fix broken library links, DarkGlass node group, RoofGableLeeches material
Setup of the Blender MCP and documented
Wave 1: Fix multi-scene issues in 6 blend files
Complete Phase 6 workspace unification, document render pipeline reference
Updated todos
Phase 6: Workspace unification across all 144 .blend files