feat(editor): preset placement polish — params, move tool, shadows, isolation (#357)

* feat(editor): preset placement polish — params, move tool, shadows

- wall/slab/ceiling/roof create paths consume `toolDefaults` so template
  presets build with their saved params; cleared on tool unmount
- wall draw preview reflects the preset's height/thickness (+ HUD labels)
- box-select picks up registry-selectable kinds (shelf) via bbox
- registry + column move tools: snap to the active grid step, R/T rotation,
  and ignore the stray trailing click that armed the move (no double-place)
- shelf geometry casts + receives shadows like fence/slab

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* feat(viewer): expose isIsolationActive() for isolation-aware consumers

Tracks whether an isolation filter is currently applied and exposes it so
hosts can avoid acting on the partial view — e.g. skipping project-thumbnail
autosave while a single subtree is isolated (preset capture).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

packages/editor/src/components/tools/registry/move-registry-node-tool.tsx

@@ -20,7 +20,15 @@ import { sfxEmitter } from '../../../lib/sfx-bus'
 import useEditor from '../../../store/use-editor'
 import { CursorSphere } from '../shared/cursor-sphere'
 
-const roundToHalf = (value: number) => Math.round(value * 2) / 2
+/** Snap a world-plan coordinate to the editor's active grid step (0.5 / 0.25
+ *  / 0.1 / 0.05), read live so changing the step mid-drag takes effect. */
+const snapToGridStep = (value: number) => {
+  const step = useEditor.getState().gridSnapStep
+  return Math.round(value / step) * step
+}
+
+/** 90° steps, matching the GLB item placement rotation. */
+const ROTATION_STEP = Math.PI / 2
 
 /**
  * Generic move tool for any registry-backed kind.
@@ -104,6 +112,19 @@ export function MoveRegistryNodeTool({ node }: { node: AnyNode }) {
    * commit position consistent with the visible cursor.
    */
   const lastCursorRef = useRef<[number, number, number]>(originalPosition)
+  /**
+   * Becomes true on the first `grid:move` after this move arms. Commits are
+   * ignored until then so a click that *armed* this move (e.g. the trailing
+   * `click` event of the click that just committed the previous copy, when a
+   * preset placement immediately re-arms the next one) can't auto-drop a
+   * second copy at the spot. Every real placement moves the cursor into
+   * position before the drop click, so this never blocks a legitimate commit.
+   */
+  const hasMovedRef = useRef(false)
+  // Live Y-rotation during the drag, seeded from the node's current rotation
+  // and bumped by R/T. Applied imperatively + mirrored to `useLiveTransforms`,
+  // and committed to the scene on drop.
+  const rotationRef = useRef(originalRotationY)
 
   const exitMoveMode = useCallback(() => {
     useEditor.getState().setMovingNode(null)
@@ -112,8 +133,18 @@ export function MoveRegistryNodeTool({ node }: { node: AnyNode }) {
   useEffect(() => {
     useScene.temporal.getState().pause()
     previousSnapRef.current = null
+    hasMovedRef.current = false
+    rotationRef.current = originalRotationY
     let committed = false
 
+    // The node's rotation shape (tuple vs scalar) is preserved on commit;
+    // only the Y angle changes. Most registry kinds use a `[x, y, z]` tuple.
+    const baseRotation = (node as { rotation?: unknown }).rotation
+    const toCommitRotation = (y: number): number | [number, number, number] =>
+      Array.isArray(baseRotation)
+        ? [(baseRotation[0] as number) ?? 0, y, (baseRotation[2] as number) ?? 0]
+        : y
+
     // Disable raycast on the moved node's meshes for the duration of
     // the drag. As the shelf follows the cursor, the cursor ray would
     // otherwise hit the moved mesh first → only `${kind}:move` fires →
@@ -135,8 +166,9 @@ export function MoveRegistryNodeTool({ node }: { node: AnyNode }) {
     }
 
     const onGridMove = (event: GridEvent) => {
-      const x = roundToHalf(event.localPosition[0])
-      const z = roundToHalf(event.localPosition[2])
+      const x = snapToGridStep(event.localPosition[0])
+      const z = snapToGridStep(event.localPosition[2])
+      hasMovedRef.current = true
       setCursorPosition([x, 0, z])
       lastCursorRef.current = [x, 0, z]
 
@@ -154,7 +186,7 @@ export function MoveRegistryNodeTool({ node }: { node: AnyNode }) {
       // their floor-plan move-targets handle the override themselves.
       useLiveTransforms.getState().set(node.id, {
         position: [x, 0, z],
-        rotation: originalRotationY,
+        rotation: rotationRef.current,
       })
 
       const prev = previousSnapRef.current
@@ -180,11 +212,17 @@ export function MoveRegistryNodeTool({ node }: { node: AnyNode }) {
      *  AND scene updated) — never the original.
      */
     const commitAtCursor = (event: ClickTriggerEvent) => {
+      // Ignore a commit that fires before the cursor has moved into place —
+      // it's the stray trailing click of whatever armed this move, not a
+      // deliberate drop. Prevents preset re-arm from double-placing.
+      if (!hasMovedRef.current) return
       const position: [number, number, number] = [...lastCursorRef.current]
 
+      const rotation = toCommitRotation(rotationRef.current)
+
       if (useScene.getState().nodes[node.id]) {
         useScene.temporal.getState().resume()
-        useScene.getState().updateNode(node.id, { position } as Partial<AnyNode>)
+        useScene.getState().updateNode(node.id, { position, rotation } as Partial<AnyNode>)
         useScene.temporal.getState().pause()
         committed = true
       } else if (node.parentId) {
@@ -196,6 +234,7 @@ export function MoveRegistryNodeTool({ node }: { node: AnyNode }) {
             id: undefined,
             metadata: {},
             position,
+            rotation,
           })
           useScene.temporal.getState().resume()
           useScene.getState().createNode(reparsed as AnyNode, node.parentId as AnyNodeId)
@@ -204,11 +243,14 @@ export function MoveRegistryNodeTool({ node }: { node: AnyNode }) {
         }
       }
 
-      // Keep mesh.position aligned with the just-committed scene position
-      // so the next R3F frame paints at the right spot even if React's
+      // Keep mesh.position/rotation aligned with the just-committed scene
+      // values so the next R3F frame paints correctly even if React's
       // reconciliation lags by a tick.
       const mesh = sceneRegistry.nodes.get(node.id)
-      if (mesh) mesh.position.set(position[0], position[1], position[2])
+      if (mesh) {
+        mesh.position.set(position[0], position[1], position[2])
+        mesh.rotation.y = rotationRef.current
+      }
 
       // Now safe to clear — node.position is already the new value, so
       // `ParametricNodeRenderer`'s next render lands at `[x, 0, z]`.
@@ -230,6 +272,26 @@ export function MoveRegistryNodeTool({ node }: { node: AnyNode }) {
       if (typeof direct === 'function') direct.call(event)
     }
 
+    // R / T rotate the dragged node about Y in 90° steps — matching the GLB
+    // item placement keys (and the "Rotate" hints the move HUD shows). Applied
+    // imperatively + mirrored to the live transform; committed on drop.
+    const onKeyDown = (e: KeyboardEvent) => {
+      if (e.metaKey || e.ctrlKey || e.altKey) return
+      let delta = 0
+      if (e.key === 'r' || e.key === 'R') delta = ROTATION_STEP
+      else if (e.key === 't' || e.key === 'T') delta = -ROTATION_STEP
+      else return
+      e.preventDefault()
+      rotationRef.current += delta
+      const m = sceneRegistry.nodes.get(node.id)
+      if (m) m.rotation.y = rotationRef.current
+      useLiveTransforms.getState().set(node.id, {
+        position: lastCursorRef.current,
+        rotation: rotationRef.current,
+      })
+    }
+    window.addEventListener('keydown', onKeyDown)
+
     emitter.on('grid:move', onGridMove)
     emitter.on('grid:click', commitAtCursor)
 
@@ -244,9 +306,11 @@ export function MoveRegistryNodeTool({ node }: { node: AnyNode }) {
     }
 
     const onCancel = () => {
-      sceneRegistry.nodes
-        .get(node.id)
-        ?.position.set(originalPosition[0], originalPosition[1], originalPosition[2])
+      const m = sceneRegistry.nodes.get(node.id)
+      if (m) {
+        m.position.set(originalPosition[0], originalPosition[1], originalPosition[2])
+        m.rotation.y = originalRotationY
+      }
       useLiveTransforms.getState().clear(node.id)
       useScene.temporal.getState().resume()
       markToolCancelConsumed()
@@ -255,6 +319,7 @@ export function MoveRegistryNodeTool({ node }: { node: AnyNode }) {
     emitter.on('tool:cancel', onCancel)
 
     return () => {
+      window.removeEventListener('keydown', onKeyDown)
       emitter.off('grid:move', onGridMove)
       emitter.off('grid:click', commitAtCursor)
       for (const kind of CLICK_TRIGGER_KINDS) {

packages/editor/src/components/tools/roof/roof-tool.tsx

@@ -34,6 +34,13 @@ const commitRoofPlacement = (
 ): AnyNode['id'] => {
   const { createNode, createNodes, nodes } = useScene.getState()
 
+  // A placed roof preset seeds `toolDefaults.roof` with the flattened
+  // subtree params (roofType, pitch, wallHeight, overhang, materials, …)
+  // before the tool activates. The footprint (width/depth) and placement
+  // come from the drawn rectangle and always win; the segment carries the
+  // shape/material params, the roof container picks up the materials.
+  const defaults = useEditor.getState().toolDefaults.roof ?? {}
+
   const centerX = (corner1[0] + corner2[0]) / 2
   const centerZ = (corner1[2] + corner2[2]) / 2
 
@@ -74,11 +81,12 @@ const commitRoofPlacement = (
     }
 
     const segment = RoofSegmentNode.parse({
-      width,
-      depth,
       wallHeight: DEFAULT_WALL_HEIGHT,
       pitch: DEFAULT_PITCH_DEG,
       roofType: 'gable',
+      ...defaults,
+      width,
+      depth,
       position: [localX, 0, localZ],
     })
 
@@ -93,16 +101,19 @@ const commitRoofPlacement = (
 
   // Create the segment first (centered in its new parent)
   const segment = RoofSegmentNode.parse({
-    width,
-    depth,
     wallHeight: DEFAULT_WALL_HEIGHT,
     pitch: DEFAULT_PITCH_DEG,
     roofType: 'gable',
+    ...defaults,
+    width,
+    depth,
     position: [0, 0, 0],
   })
 
-  // Create the roof container
+  // Create the roof container. Segment-shaped params (roofType, pitch, …) are
+  // dropped by the RoofNode schema; surface materials in `defaults` carry over.
   const roof = RoofNode.parse({
+    ...defaults,
     name,
     position: [centerX, 0, centerZ],
     children: [segment.id],
@@ -138,6 +149,10 @@ export const RoofTool: React.FC = () => {
     selectedIdsRef.current = selectedIds
   }, [selectedIds])
 
+  // Clear preset-seeded defaults on deactivation so a later manual roof draw
+  // isn't built with a stale preset's parameters. Unmount-only.
+  useEffect(() => () => useEditor.getState().setToolDefaults('roof', null), [])
+
   const corner1Ref = useRef<[number, number, number] | null>(null)
   const previousGridPosRef = useRef<[number, number] | null>(null)
   const [preview, setPreview] = useState<PreviewState>({

packages/editor/src/components/tools/select/box-select-tool.tsx

@@ -8,6 +8,7 @@ import {
   emitter,
   type GridEvent,
   type ItemNode,
+  isRegistrySelectable,
   type LevelNode,
   type SlabNode,
   sceneRegistry,
@@ -272,6 +273,13 @@ function collectNodeIdsInBounds(bounds: Bounds): string[] {
         if (xz && pointInBounds(xz[0], xz[1], bounds)) {
           result.push(item.id)
         }
+      } else if (isRegistrySelectable(node.type)) {
+        // Registry-driven selectable kinds (shelf + future furnish/structure
+        // kinds) aren't in the hardcoded list above; pick them up by their
+        // rendered bounding box, the same path column/stair use.
+        if (objectBoundsIntersectsBounds(node.id, bounds)) {
+          result.push(node.id)
+        }
       }
     }
   }

packages/editor/src/components/tools/wall/wall-drafting.ts

@@ -507,7 +507,12 @@ export function createWallOnCurrentLevel(
   }
 
   const wallCount = Object.values(nodes).filter((node) => node.type === 'wall').length
+  // A placed wall preset seeds `toolDefaults.wall` (thickness, height,
+  // materials, sides) before the tool activates; merge those first so the
+  // drawn wall reproduces the preset. Identity + endpoints always win.
+  const defaults = useEditor.getState().toolDefaults.wall ?? {}
   const wall = WallSchema.parse({
+    ...defaults,
     name: `Wall ${wallCount + 1}`,
     start: resolvedStart,
     end: resolvedEnd,

packages/nodes/src/ceiling/tool.tsx

@@ -1,7 +1,13 @@
 'use client'
 
 import { emitter, type GridEvent, type LevelNode, useScene } from '@pascal-app/core'
-import { CursorSphere, EDITOR_LAYER, markToolCancelConsumed, triggerSFX } from '@pascal-app/editor'
+import {
+  CursorSphere,
+  EDITOR_LAYER,
+  markToolCancelConsumed,
+  triggerSFX,
+  useEditor,
+} from '@pascal-app/editor'
 import { useViewer } from '@pascal-app/viewer'
 import { useEffect, useMemo, useRef, useState } from 'react'
 import { BufferGeometry, DoubleSide, type Group, type Line, Shape, Vector3 } from 'three'
@@ -46,7 +52,10 @@ function commitCeilingDrawing(levelId: LevelNode['id'], points: Array<[number, n
   const { createNode, nodes } = useScene.getState()
   const ceilingCount = Object.values(nodes).filter((n) => n.type === 'ceiling').length
   const name = `Ceiling ${ceilingCount + 1}`
-  const ceiling = CeilingNode.parse({ name, polygon: points })
+  // A placed ceiling preset seeds `toolDefaults.ceiling` (thickness, height,
+  // material, …) before the tool activates; the drawn polygon always wins.
+  const defaults = useEditor.getState().toolDefaults.ceiling ?? {}
+  const ceiling = CeilingNode.parse({ ...defaults, name, polygon: points })
   createNode(ceiling, levelId)
   triggerSFX('sfx:structure-build')
   return ceiling.id
@@ -70,6 +79,10 @@ export const CeilingTool: React.FC = () => {
   const previousSnappedPointRef = useRef<[number, number] | null>(null)
   const shiftPressed = useRef(false)
 
+  // Clear preset-seeded defaults on deactivation so a later manual ceiling
+  // draw isn't built with a stale preset's parameters. Unmount-only.
+  useEffect(() => () => useEditor.getState().setToolDefaults('ceiling', null), [])
+
   const verticalGeo = useMemo(
     () =>
       new BufferGeometry().setFromPoints([

packages/nodes/src/column/move-tool.tsx

@@ -28,7 +28,14 @@ import { useCallback, useEffect, useState } from 'react'
  * dispatcher's `getRegistryAffordanceTool('column', 'move')` lookup
  * picks this up before its legacy chain reaches `<MoveColumnTool>`.
  */
-const roundToHalf = (value: number) => Math.round(value * 2) / 2
+/** Snap to the editor's active grid step (0.5 / 0.25 / 0.1 / 0.05), read live. */
+const snapToGridStep = (value: number) => {
+  const step = useEditor.getState().gridSnapStep
+  return Math.round(value / step) * step
+}
+
+/** 90° steps, matching the GLB item / shelf placement rotation. */
+const ROTATION_STEP = Math.PI / 2
 
 function MoveColumnTool({ node }: { node: ColumnNode }) {
   const [previewPosition, setPreviewPosition] = useState<[number, number, number]>(node.position)
@@ -40,6 +47,14 @@ function MoveColumnTool({ node }: { node: ColumnNode }) {
   useEffect(() => {
     useScene.temporal.getState().pause()
     let committed = false
+    // Ignore a commit before the cursor has moved into place: it's the stray
+    // trailing click of whatever armed this move (e.g. a preset re-arming the
+    // next copy right after a placement click), not a deliberate drop.
+    let hasMoved = false
+    // Live Y-rotation, seeded from the column and bumped by R/T.
+    let rotationY = node.rotation
+    // Latest previewed position, so an R/T press can re-apply at the spot.
+    let lastPosition: [number, number, number] = node.position
     const meta =
       typeof node.metadata === 'object' && node.metadata !== null
         ? (node.metadata as Record<string, unknown>)
@@ -47,23 +62,47 @@ function MoveColumnTool({ node }: { node: ColumnNode }) {
     const isNew = !!meta.isNew
 
     const applyPreview = (position: [number, number, number]) => {
+      lastPosition = position
       setPreviewPosition(position)
       useLiveTransforms.getState().set(node.id, {
         position,
-        rotation: node.rotation,
+        rotation: rotationY,
       })
-      sceneRegistry.nodes.get(node.id)?.position.set(position[0], position[1], position[2])
+      const m = sceneRegistry.nodes.get(node.id)
+      if (m) {
+        m.position.set(position[0], position[1], position[2])
+        m.rotation.y = rotationY
+      }
     }
 
     const onGridMove = (event: GridEvent) => {
-      applyPreview([roundToHalf(event.localPosition[0]), 0, roundToHalf(event.localPosition[2])])
+      hasMoved = true
+      applyPreview([
+        snapToGridStep(event.localPosition[0]),
+        0,
+        snapToGridStep(event.localPosition[2]),
+      ])
+    }
+
+    // R / T rotate the dragged column about Y in 90° steps (matches the move
+    // HUD's "Rotate" hints), committed on drop.
+    const onKeyDown = (e: KeyboardEvent) => {
+      if (e.metaKey || e.ctrlKey || e.altKey) return
+      let delta = 0
+      if (e.key === 'r' || e.key === 'R') delta = ROTATION_STEP
+      else if (e.key === 't' || e.key === 'T') delta = -ROTATION_STEP
+      else return
+      e.preventDefault()
+      rotationY += delta
+      applyPreview(lastPosition)
     }
 
     const onGridClick = (event: GridEvent) => {
+      if (!hasMoved) return
       const position: [number, number, number] = [
-        roundToHalf(event.localPosition[0]),
+        snapToGridStep(event.localPosition[0]),
         0,
-        roundToHalf(event.localPosition[2]),
+        snapToGridStep(event.localPosition[2]),
       ]
       const nodeId = (node as { id?: ColumnNode['id'] }).id
 
@@ -71,13 +110,16 @@ function MoveColumnTool({ node }: { node: ColumnNode }) {
         committed = true
         useLiveTransforms.getState().clear(nodeId)
         useScene.temporal.getState().resume()
-        useScene.getState().updateNode(nodeId, { position, ...(isNew ? { metadata: {} } : {}) })
+        useScene
+          .getState()
+          .updateNode(nodeId, { position, rotation: rotationY, ...(isNew ? { metadata: {} } : {}) })
       } else if (node.parentId) {
         const column = ColumnNodeSchema.parse({
           ...node,
           id: undefined,
           metadata: {},
           position,
+          rotation: rotationY,
         })
         committed = true
         useScene.temporal.getState().resume()
@@ -92,27 +134,33 @@ function MoveColumnTool({ node }: { node: ColumnNode }) {
 
     const onCancel = () => {
       useLiveTransforms.getState().clear(node.id)
-      sceneRegistry.nodes
-        .get(node.id)
-        ?.position.set(node.position[0], node.position[1], node.position[2])
+      const m = sceneRegistry.nodes.get(node.id)
+      if (m) {
+        m.position.set(node.position[0], node.position[1], node.position[2])
+        m.rotation.y = node.rotation
+      }
       useScene.temporal.getState().resume()
       markToolCancelConsumed()
       exitMoveMode()
     }
 
+    window.addEventListener('keydown', onKeyDown)
     emitter.on('grid:move', onGridMove)
     emitter.on('grid:click', onGridClick)
     emitter.on('tool:cancel', onCancel)
 
     return () => {
+      window.removeEventListener('keydown', onKeyDown)
       emitter.off('grid:move', onGridMove)
       emitter.off('grid:click', onGridClick)
       emitter.off('tool:cancel', onCancel)
       useLiveTransforms.getState().clear(node.id)
       if (!committed) {
-        sceneRegistry.nodes
-          .get(node.id)
-          ?.position.set(node.position[0], node.position[1], node.position[2])
+        const m = sceneRegistry.nodes.get(node.id)
+        if (m) {
+          m.position.set(node.position[0], node.position[1], node.position[2])
+          m.rotation.y = node.rotation
+        }
         useScene.temporal.getState().resume()
       }
     }

packages/nodes/src/shelf/geometry.ts

@@ -93,6 +93,13 @@ export function buildShelfGeometry(
       break
   }
 
+  // Boards/brackets cast + receive shadows like the other geometry-driven
+  // kinds (fence, slab). Set once here rather than on every `new Mesh` above.
+  for (const child of group.children) {
+    child.castShadow = true
+    child.receiveShadow = true
+  }
+
   return group
 }
 

packages/nodes/src/slab/tool.tsx

@@ -1,7 +1,13 @@
 'use client'
 
 import { emitter, type GridEvent, type LevelNode, useScene } from '@pascal-app/core'
-import { CursorSphere, EDITOR_LAYER, markToolCancelConsumed, triggerSFX } from '@pascal-app/editor'
+import {
+  CursorSphere,
+  EDITOR_LAYER,
+  markToolCancelConsumed,
+  triggerSFX,
+  useEditor,
+} from '@pascal-app/editor'
 import { useViewer } from '@pascal-app/viewer'
 import { useEffect, useMemo, useRef, useState } from 'react'
 import { BufferGeometry, DoubleSide, type Group, type Line, Shape, Vector3 } from 'three'
@@ -47,7 +53,10 @@ function commitSlabDrawing(levelId: LevelNode['id'], points: Array<[number, numb
   const { createNode, nodes } = useScene.getState()
   const slabCount = Object.values(nodes).filter((n) => n.type === 'slab').length
   const name = `Slab ${slabCount + 1}`
-  const slab = SlabNode.parse({ name, polygon: points })
+  // A placed slab preset seeds `toolDefaults.slab` (thickness, material, …)
+  // before the tool activates; the drawn polygon always wins.
+  const defaults = useEditor.getState().toolDefaults.slab ?? {}
+  const slab = SlabNode.parse({ ...defaults, name, polygon: points })
   createNode(slab, levelId)
   triggerSFX('sfx:structure-build')
   return slab.id
@@ -67,6 +76,10 @@ export const SlabTool: React.FC = () => {
   const previousSnappedPointRef = useRef<[number, number] | null>(null)
   const shiftPressed = useRef(false)
 
+  // Clear preset-seeded defaults on deactivation so a later manual slab draw
+  // isn't built with a stale preset's parameters. Unmount-only.
+  useEffect(() => () => useEditor.getState().setToolDefaults('slab', null), [])
+
   useEffect(() => {
     if (!currentLevelId) return
 

packages/nodes/src/wall/tool.tsx

@@ -21,6 +21,7 @@ import {
   type SegmentAngleReference,
   snapWallDraftPoint,
   triggerSFX,
+  useEditor,
   WALL_FINE_GRID_STEP,
   type WallPlanPoint,
 } from '@pascal-app/editor'
@@ -44,9 +45,11 @@ import { BoxGeometry, BufferGeometry, DoubleSide, type Group, type Mesh, Vector3
  */
 const WALL_HEIGHT = 2.5
 const DRAFT_WALL_THICKNESS = 0.1
-const DRAFT_LABEL_Y = WALL_HEIGHT + 0.22
-const DRAFT_ANGLE_LABEL_Y = WALL_HEIGHT + 0.08
-const DRAFT_ANGLE_ARC_Y = WALL_HEIGHT + 0.012
+// HUD label heights are measured from the top of the preview bar, so they
+// track whatever height a seeded preset draws at (`previewHeight`).
+const DRAFT_LABEL_Y_OFFSET = 0.22
+const DRAFT_ANGLE_LABEL_Y_OFFSET = 0.08
+const DRAFT_ANGLE_ARC_Y_OFFSET = 0.012
 const DRAFT_ANGLE_ARC_MIN_RADIUS = 0.32
 const DRAFT_ANGLE_ARC_MAX_RADIUS = 0.72
 const DRAFT_ANGLE_ARC_SEGMENTS = 24
@@ -259,6 +262,7 @@ function getDraftAngleLabels(
   end: WallPlanPoint,
   walls: WallNode[],
   baseY: number,
+  previewHeight: number,
 ): DraftAngleLabel[] {
   const draftFromStart: WallPlanPoint = [end[0] - start[0], end[1] - start[1]]
   const draftFromEnd: WallPlanPoint = [start[0] - end[0], start[1] - end[1]]
@@ -313,7 +317,7 @@ function getDraftAngleLabels(
       label: formatAngleRadians(angle),
       position: [
         arcCenter[0] + Math.cos(arc.midAngle) * (radius + 0.16),
-        baseY + DRAFT_ANGLE_LABEL_Y,
+        baseY + previewHeight + DRAFT_ANGLE_LABEL_Y_OFFSET,
         arcCenter[1] + Math.sin(arc.midAngle) * (radius + 0.16),
       ],
       arc: {
@@ -321,7 +325,7 @@ function getDraftAngleLabels(
         radius,
         startAngle: arc.startAngle,
         endAngle: arc.endAngle,
-        y: baseY + DRAFT_ANGLE_ARC_Y,
+        y: baseY + previewHeight + DRAFT_ANGLE_ARC_Y_OFFSET,
       },
     })
   }
@@ -335,6 +339,7 @@ function getDraftMeasurementState(
   walls: WallNode[],
   unit: 'metric' | 'imperial',
   baseY: number,
+  previewHeight: number,
 ): DraftMeasurementState {
   const dx = end[0] - start[0]
   const dz = end[1] - start[1]
@@ -342,12 +347,22 @@ function getDraftMeasurementState(
   if (length < 0.01) return null
   return {
     lengthLabel: formatMeasurement(length, unit),
-    lengthPosition: [(start[0] + end[0]) / 2, baseY + DRAFT_LABEL_Y, (start[1] + end[1]) / 2],
-    angleLabels: getDraftAngleLabels(start, end, walls, baseY),
+    lengthPosition: [
+      (start[0] + end[0]) / 2,
+      baseY + previewHeight + DRAFT_LABEL_Y_OFFSET,
+      (start[1] + end[1]) / 2,
+    ],
+    angleLabels: getDraftAngleLabels(start, end, walls, baseY, previewHeight),
   }
 }
 
-function updateWallPreview(mesh: Mesh, start: Vector3, end: Vector3) {
+function updateWallPreview(
+  mesh: Mesh,
+  start: Vector3,
+  end: Vector3,
+  previewHeight: number,
+  previewThickness: number,
+) {
   const direction = new Vector3(end.x - start.x, 0, end.z - start.z)
   const length = direction.length()
   if (length < 0.01) {
@@ -357,10 +372,10 @@ function updateWallPreview(mesh: Mesh, start: Vector3, end: Vector3) {
   mesh.visible = true
   direction.normalize()
 
-  const geometry = new BoxGeometry(length, WALL_HEIGHT, DRAFT_WALL_THICKNESS)
+  const geometry = new BoxGeometry(length, previewHeight, previewThickness)
   const angle = Math.atan2(direction.z, direction.x)
 
-  mesh.position.set((start.x + end.x) / 2, start.y + WALL_HEIGHT / 2, (start.z + end.z) / 2)
+  mesh.position.set((start.x + end.x) / 2, start.y + previewHeight / 2, (start.z + end.z) / 2)
   mesh.rotation.y = -angle
 
   if (mesh.geometry) {
@@ -383,6 +398,19 @@ function getCurrentLevelWalls(): WallNode[] {
 export const WallTool: React.FC = () => {
   const unit = useViewer((state) => state.unit)
   const isDark = useViewer((state) => getSceneTheme(state.sceneTheme).appearance === 'dark')
+  // A placed wall preset seeds `toolDefaults.wall` (height / thickness …)
+  // before the tool mounts, so the draft preview is drawn at the preset's
+  // dimensions rather than the generic fallbacks — matching the wall that
+  // will be created. Read through refs so the live event handlers below see
+  // the latest values without re-subscribing.
+  const wallDefaults = useEditor((s) => s.toolDefaults.wall)
+  const previewHeight = typeof wallDefaults?.height === 'number' ? wallDefaults.height : WALL_HEIGHT
+  const previewThickness =
+    typeof wallDefaults?.thickness === 'number' ? wallDefaults.thickness : DRAFT_WALL_THICKNESS
+  const previewHeightRef = useRef(previewHeight)
+  previewHeightRef.current = previewHeight
+  const previewThicknessRef = useRef(previewThickness)
+  previewThicknessRef.current = previewThickness
   const cursorRef = useRef<Group>(null)
   const wallPreviewRef = useRef<Mesh>(null!)
   const startingPoint = useRef(new Vector3(0, 0, 0))
@@ -393,6 +421,10 @@ export const WallTool: React.FC = () => {
   const measurementColor = isDark ? '#ffffff' : '#111111'
   const measurementShadowColor = isDark ? '#111111' : '#ffffff'
 
+  // Clear preset-seeded defaults on deactivation so a later manual wall draw
+  // isn't built with a stale preset's parameters. Unmount-only.
+  useEffect(() => () => useEditor.getState().setToolDefaults('wall', null), [])
+
   useEffect(() => {
     let gridPosition: WallPlanPoint = [0, 0]
     let previousWallEnd: [number, number] | null = null
@@ -434,7 +466,13 @@ export const WallTool: React.FC = () => {
         }
         previousWallEnd = currentWallEnd
 
-        updateWallPreview(wallPreviewRef.current, startingPoint.current, endingPoint.current)
+        updateWallPreview(
+          wallPreviewRef.current,
+          startingPoint.current,
+          endingPoint.current,
+          previewHeightRef.current,
+          previewThicknessRef.current,
+        )
         setDraftMeasurement(
           getDraftMeasurementState(
             [startingPoint.current.x, startingPoint.current.z],
@@ -442,6 +480,7 @@ export const WallTool: React.FC = () => {
             walls,
             unit,
             startingPoint.current.y,
+            previewHeightRef.current,
           ),
         )
       } else {
@@ -538,7 +577,7 @@ export const WallTool: React.FC = () => {
 
   return (
     <group>
-      <CursorSphere ref={cursorRef} />
+      <CursorSphere height={previewHeight} ref={cursorRef} />
       <mesh layers={EDITOR_LAYER} ref={wallPreviewRef} renderOrder={1} visible={false}>
         <shapeGeometry />
         <meshBasicMaterial

packages/viewer/src/index.ts

@@ -37,7 +37,12 @@ export {
   SUBTRACTION,
 } from './lib/csg-utils'
 export type { EdgeMode } from './lib/edge-style'
-export { applyIsolation, clearIsolation, collectIsolationSubtree } from './lib/isolation'
+export {
+  applyIsolation,
+  clearIsolation,
+  collectIsolationSubtree,
+  isIsolationActive,
+} from './lib/isolation'
 export { GRID_LAYER, OVERLAY_LAYER, SCENE_LAYER, ZONE_LAYER } from './lib/layers'
 export {
   applyMaterialPresetToMaterials,

packages/viewer/src/lib/isolation.ts

@@ -12,6 +12,17 @@ const ORIGINAL_LAYERS = Symbol('isolation:original-layers')
 
 type IsolationCarrier = Object3D & { [ORIGINAL_LAYERS]?: number }
 
+// Whether a subtree is currently isolated (some objects have SCENE_LAYER
+// disabled). Read by consumers that must not act on the partial view — e.g.
+// the project-thumbnail autosave skips capturing while isolated so it never
+// snapshots a single focused item as the whole project's thumbnail.
+let isolationActive = false
+
+/** True while an isolation filter is applied (see {@link applyIsolation}). */
+export function isIsolationActive(): boolean {
+  return isolationActive
+}
+
 /**
  * Compute the union of every isolated subtree's `Object3D` descendants.
  *
@@ -71,6 +82,7 @@ export function applyIsolation(ids: ReadonlyArray<AnyNodeId> | null): void {
     if (keep.has(obj)) continue
     hideRecursive(obj, keep)
   }
+  isolationActive = true
 }
 
 function hideRecursive(obj: Object3D, keep: Set<Object3D>): void {
@@ -98,4 +110,5 @@ export function clearIsolation(): void {
       }
     })
   }
+  isolationActive = false
 }