* feat: add polygon movement support to editor and implement dedicated move tools for walls, slabs, and ceilings
* feat: add uv2 attribute to ceiling and slab geometries for lightmap support
* Fix curved wall miters and align roof position sliders
* Fix wall measurement label and extension anchors
* Fix WebGPU renderer initialization order
* fix(editor): scope wall movement to the selected level
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Co-authored-by: Pascal <open@pascal.app>
* Add catalog-based material presets across structural nodes
* Fix material picker fallback and wall visible highlights
* Preserve wall materials in selection highlights
- Add MaterialSchema with 10 presets (white, brick, concrete, wood, glass, metal, plaster, tile, marble, custom)
- Add material field to Wall, Slab, Door, Window, Ceiling, Roof, RoofSegment nodes
- Create MaterialPicker UI component with preset selection and custom properties
- Update all renderers to support material rendering with caching
- Add Material section to all node panels (WallPanel, SlabPanel, DoorPanel, WindowPanel, CeilingPanel, RoofPanel, RoofSegmentPanel)
- Update AGENTS.md with Material System documentation
