Phase 5 batch: door + window migrate to registry (always-on)

Both kinds share traits — hosted on walls, cuttable, animated open/
close state via a geometry system + animation system. Stage A
migration: register + wrap-export the legacy renderer + bundle both
per-kind systems. Pure geometry + floor-plan ports are later
milestones.

Files added (packages/nodes/src/door/, packages/nodes/src/window/):
 - schema.ts: re-export from core.
 - parametrics.ts: minimal — dimensions only. Door has 29 sliders +
   segmented controls + presets in its legacy panel; window has 15+
   sliders. Auto-inspector can't cover them at Stage A — legacy
   panel keeps rendering via panel-manager.tsx case fall-through.
   Stage E may extend parametrics or use parametrics.customPanel
   escape hatch.
 - definition.ts: capabilities (no `movable` — wall-bound drag is
   bespoke; capability-driven dispatch keeps legacy MoveDoorTool /
   MoveWindowTool), parametrics, renderer, system. defaults() uses
   `DoorNode.parse({...stub})` to leverage zod's schema-level
   `.default()` annotations — door has 40+ fields, window has 20+;
   listing them inline duplicates the schema.
 - renderer.tsx: wrap-export of legacy DoorRenderer / WindowRenderer
   (thin 33-36 lines each).
 - system.tsx: bundles each kind's TWO systems — DoorSystem +
   DoorAnimationSystem, WindowSystem + WindowAnimationSystem. Both
   per-kind systems mount via RegisteredSystems when the kind is
   registry-driven; `<LegacySystem kind="door|window">` wrappers
   around each individual system short-circuit.
 - index.ts: barrel.

Files changed:
 - packages/viewer/src/index.ts: new public exports for DoorRenderer,
   DoorSystem, DoorAnimationSystem, WindowRenderer, WindowSystem,
   WindowAnimationSystem.
 - packages/nodes/src/index.ts: appends doorDefinition + windowDefinition.
 - packages/editor/src/components/ui/panels/door-panel.tsx + window-
   panel.tsx: panel slider-drag fix recipe applied. Drop the
   subscribed `updateNode` action, drop the `node` dep from
   handleUpdate / previewDoorUpdate / commitDoorPreview useCallbacks.
   Use useScene.getState() inside. Door panel has 29 SliderControls,
   window 15+ — both at high risk of the Maximum update depth
   cascade without the fix.

Phase 5 progress: shelf ✅, spawn ✅, wall ✅, fence ✅, slab ✅, ceiling ✅,
door ✅, window ✅. Eight kinds on the registry. Item / stair / roof /
zone / containers remain.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/nodes/src/window/definition.ts

@@ -0,0 +1,59 @@
+import type { NodeDefinition } from '@pascal-app/core'
+import { windowParametrics } from './parametrics'
+import { WindowNode } from './schema'
+
+/**
+ * Window — Phase 5 batch kind. Mirrors door's shape: hosted on walls,
+ * cuts holes in them, animated open/close state for opening windows.
+ *
+ * Capabilities: no `movable` (wall-bound drag is bespoke). Tool field
+ * absent (legacy WindowTool / MoveWindowTool continue).
+ */
+export const windowDefinition: NodeDefinition<typeof WindowNode> = {
+  kind: 'window',
+  schemaVersion: 1,
+  schema: WindowNode,
+  category: 'structure',
+
+  // Same schema-driven defaults trick as door: parse a stub, strip
+  // id/type. Window also has many fields with zod `.default()` set.
+  defaults: () => {
+    const stub = WindowNode.parse({ id: 'window_default' as never, type: 'window' })
+    const { id: _id, type: _type, ...rest } = stub
+    return rest
+  },
+
+  capabilities: {
+    selectable: { hitVolume: 'bbox' },
+    duplicable: true,
+    deletable: true,
+  },
+
+  parametrics: windowParametrics,
+
+  renderer: {
+    kind: 'parametric',
+    module: () => import('./renderer'),
+  },
+  system: {
+    module: () => import('./system'),
+    priority: 3,
+  },
+
+  toolHints: [
+    { key: 'Left click', label: 'Place window on wall' },
+    { key: 'Esc', label: 'Cancel' },
+  ],
+
+  presentation: {
+    label: 'Window',
+    description: 'A window cut into a wall. Animated open/close for opening windows.',
+    icon: { kind: 'iconify', name: 'lucide:rectangle-horizontal' },
+    paletteSection: 'structure',
+    paletteOrder: 60,
+  },
+
+  mcp: {
+    description: 'A window mounted on a wall, with type / dimensions / opening options.',
+  },
+}

packages/nodes/src/window/index.ts

@@ -0,0 +1,2 @@
+export { windowDefinition } from './definition'
+export { WindowNode } from './schema'

packages/nodes/src/window/parametrics.ts

@@ -0,0 +1,21 @@
+import type { ParametricDescriptor } from '@pascal-app/core'
+import type { WindowNode } from './schema'
+
+/**
+ * Minimal inspector descriptor for window. Like door, the legacy
+ * `<WindowPanel>` has 15+ SliderControls covering sashes, dividers,
+ * sill, frame, opening shape — too elaborate for the auto-inspector
+ * at Stage A. Legacy panel keeps rendering via panel-manager's
+ * `case 'window':`.
+ */
+export const windowParametrics: ParametricDescriptor<WindowNode> = {
+  groups: [
+    {
+      label: 'Dimensions',
+      fields: [
+        { key: 'width', kind: 'number', unit: 'm', min: 0.3, max: 4, step: 0.05 },
+        { key: 'height', kind: 'number', unit: 'm', min: 0.3, max: 4, step: 0.05 },
+      ],
+    },
+  ],
+}

packages/nodes/src/window/renderer.tsx

@@ -0,0 +1,9 @@
+'use client'
+
+import { WindowRenderer } from '@pascal-app/viewer'
+
+/**
+ * Wrap-export of the legacy `WindowRenderer`. Thin (~36 lines); Phase 5
+ * Stage F inlines it here and deletes the viewer-side file.
+ */
+export default WindowRenderer

packages/nodes/src/window/schema.ts

@@ -0,0 +1 @@
+export { WindowNode } from '@pascal-app/core'

packages/nodes/src/window/system.tsx

@@ -0,0 +1,27 @@
+'use client'
+
+import { WindowAnimationSystem, WindowSystem } from '@pascal-app/viewer'
+
+/**
+ * Registry-driven window system bundle. Same shape as door — two
+ * per-frame systems wrapped together:
+ *
+ *  - **`WindowSystem`** — rebuilds frame / sash / divider / sill /
+ *    muntin geometry. Cascades dirty to parent wall for the cutout.
+ *  - **`WindowAnimationSystem`** — advances sash/panel open state at
+ *    frame priority 2, then marks the window dirty for the geometry
+ *    rebuild at priority 3.
+ *
+ * Both wrapped in `<LegacySystem kind="window">` legacy mounts; with
+ * window registered, those short-circuit and this bundle takes over.
+ */
+const WindowSystems = () => {
+  return (
+    <>
+      <WindowAnimationSystem />
+      <WindowSystem />
+    </>
+  )
+}
+
+export default WindowSystems