feat: curved wall and fixes (#236)

* 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>

packages/core/src/schema/nodes/wall.ts

@@ -15,6 +15,7 @@ export const WallNode = BaseNode.extend({
   materialPreset: z.string().optional(),
   thickness: z.number().optional(),
   height: z.number().optional(),
+  curveOffset: z.number().optional(),
   // e.g., start/end points for path
   start: z.tuple([z.number(), z.number()]),
   end: z.tuple([z.number(), z.number()]),
@@ -26,6 +27,7 @@ export const WallNode = BaseNode.extend({
   Wall node - used to represent a wall in the building
   - thickness: thickness in meters
   - height: height in meters
+  - curveOffset: midpoint sagitta offset used to bend the wall into an arc
   - start: start point of the wall in level coordinate system
   - end: end point of the wall in level coordinate system
   - size: size of the wall in grid units