feat: doors and windows on roof-segment wall faces

Openings now host on the walls a roof segment generates — the base
walls under the roof and the coplanar gable/shed/gambrel end faces, so
a window can sit in a gable pediment.

- core: roof-segment-walls.ts models the four vertical faces as 2D
  frames (u along face, v height) with convex profile polygons that
  mirror the wall volume getRoofSegmentBrushes builds; rect-in-profile
  clamping and anchored resize limits via half-plane algebra.
- schemas: optional roofSegmentId on door/window; position is the
  segment-local wall mid-plane center, rotation[1] the face yaw.
- cut: reuses capabilities.roofAccessory.buildCut; new cutScope: 'wall'
  subtracts from the wall brush only. cascadesViaHostSegment keeps the
  roof-merge loop from consuming door/window dirty marks (their own
  systems cascade via parentId).
- tools: roof:* handlers in door/window tool + move-tool (the Build-tab
  preset path), with roofSegmentId cleared/restored across every
  roof<->wall re-anchor and revert; shared hit resolver normalizes
  normals through world space (merged mesh vs painted segment frames).
- fix: RoofSystem no longer rebuilds per-segment CSG in accessory-reveal
  mode — the uncut rebuild used to draw over the merged shell's fresh
  opening until deselect.
- fix: the walkthrough collider world now prunes by renderer-effective
  visibility; stale uncut segment CSG inside the hidden segments-wrapper
  blocked the player at openings the merged shell had cut through.

Known gap: painted segments render per-segment CSG without accessory
cuts (pre-existing, also affects skylight/dormer). Twice Codex-reviewed;
details in private-editor plans/editor-roof-wall-openings.md.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/nodes/src/door/renderer.tsx

@@ -1,6 +1,12 @@
 'use client'
 
-import { type DoorNode, useRegistry, useScene } from '@pascal-app/core'
+import {
+  type AnyNodeId,
+  type DoorNode,
+  type RoofSegmentNode,
+  useRegistry,
+  useScene,
+} from '@pascal-app/core'
 import { useNodeEvents } from '@pascal-app/viewer'
 import { useLayoutEffect, useRef } from 'react'
 import { type Mesh, MeshBasicMaterial } from 'three'
@@ -17,7 +23,17 @@ export const DoorRenderer = ({ node }: { node: DoorNode }) => {
   const handlers = useNodeEvents(node, 'door')
   const isTransient = !!(node.metadata as Record<string, unknown> | null)?.isTransient
 
-  return (
+  // Roof-hosted doors mount under the roof's `roof-elements` group (roof
+  // frame), so the host segment's transform is applied here — wall-hosted
+  // doors get it for free from the wall mesh they're nested in.
+  const segment = useScene((state) =>
+    node.roofSegmentId
+      ? (state.nodes[node.roofSegmentId as AnyNodeId] as RoofSegmentNode | undefined)
+      : undefined,
+  )
+  if (node.roofSegmentId && segment?.type !== 'roof-segment') return null
+
+  const mesh = (
     <mesh
       castShadow
       material={doorHitboxMaterial}
@@ -31,6 +47,13 @@ export const DoorRenderer = ({ node }: { node: DoorNode }) => {
       <boxGeometry args={[0, 0, 0]} />
     </mesh>
   )
+
+  if (!segment) return mesh
+  return (
+    <group position={segment.position} rotation-y={segment.rotation}>
+      {mesh}
+    </group>
+  )
 }
 
 export default DoorRenderer