Reset core/viewer/editor/mcp packages and apps/editor from private-editor

Wholesale swap of packages/{core,viewer,editor,mcp} and apps/editor with the
versions from the private editor repo, which is the production source of truth.

Setup changes:
- packages/{core,viewer,editor} versions held at 0.7.0 baseline (matching
  the most recent published release) so a bump=minor publishes 0.8.0
- packages/mcp held at 0.1.1 (never published; first publish will go through
  the new release.yml flow)
- peerDependencies and devDependencies for inter-package @pascal-app/*
  references pinned to ^0.7.0 instead of '*' / 'workspace:*' so they are
  valid for npm consumers
- Root package.json: TypeScript bumped to 6.0.2, added overrides for
  @types/react, @types/react-dom, @types/three to prevent JSX namespace
  fragmentation across the workspace
- release.yml extended to also publish editor and mcp; 'both' option renamed
  to 'all'; added a sync step that updates inter-package peerDeps/devDeps to
  match the new versions on every bump (so viewer/editor/mcp tarballs always
  reference the version of core they were built against)
- Root scripts gained release:editor and release:mcp shortcuts

Verification:
- bun install --frozen-lockfile is consistent
- packages/{core,viewer,mcp} build cleanly, dist/index.d.ts emitted
- packages/editor check-types reports 21 pre-existing errors, identical to
  what private-editor currently reports

Open PRs against editor-v2 will need rebasing/conflict resolution.

packages/mcp/src/bridge/index.ts

@@ -0,0 +1,10 @@
+export type {
+  ActiveSceneMeta,
+  CreatePatch,
+  DeletePatch,
+  Patch,
+  UpdatePatch,
+  ValidationError,
+  ValidationResult,
+} from './scene-bridge'
+export { SceneBridge } from './scene-bridge'

packages/mcp/src/bridge/scene-bridge.test.ts

@@ -401,27 +401,6 @@ describe('SceneBridge', () => {
   })
 
   describe('setScene / exportJSON / loadJSON', () => {
-    test('setScene prunes duplicated levels that were accidentally saved as roots', () => {
-      const level0 = LevelNode.parse({ level: 0, children: [] })
-      const building = BuildingNode.parse({ children: [level0.id] })
-      const site = SiteNode.parse({ children: [building] })
-      const orphanLevel = LevelNode.parse({ level: 1, children: [] })
-
-      bridge.setScene(
-        {
-          [site.id]: site,
-          [building.id]: building,
-          [level0.id]: level0,
-          [orphanLevel.id]: orphanLevel,
-        } as any,
-        [site.id, orphanLevel.id] as any,
-      )
-
-      expect(bridge.getRootNodeIds()).toEqual([site.id])
-      expect(bridge.getNode(orphanLevel.id)).toBeNull()
-      expect(bridge.findNodes({ type: 'level' }).map((node) => node.id)).toEqual([level0.id])
-    })
-
     test('exportJSON returns the scene shape', () => {
       const exp = bridge.exportJSON()
       expect(typeof exp.nodes).toBe('object')

packages/mcp/src/bridge/scene-bridge.ts

@@ -493,7 +493,7 @@ export class SceneBridge {
   private _findParentByChildrenScan(id: AnyNodeId): AnyNode | null {
     const nodes = useScene.getState().nodes
     for (const candidate of Object.values(nodes)) {
-      if (!('children' in candidate) || !Array.isArray(candidate.children)) continue
+      if (!('children' in candidate && Array.isArray(candidate.children))) continue
       for (const child of candidate.children as unknown[]) {
         let childId: string | null = null
         if (typeof child === 'string') childId = child