chore(ts7): adopt the TypeScript 7 native compiler (tsgo)

Make the editor packages compatible with, and benefit from, the native Go
compiler (TypeScript 7 / tsgo) while keeping the npm publish path on stable tsc.

- Add @typescript/native-preview (pinned 7.0.0-dev.20260624.1). tsgo coexists
  with typescript@6, which Next typegen and the IDE plugin still need until the
  TS 7.1 programmatic API ships.
- Fix two react-three-fiber JSX augmentations the native checker rejects but
  tsc tolerated:
  - viewer: map only LineBasicNodeMaterial (the one webgpu node material used as
    a JSX tag) instead of the whole three/webgpu namespace (TS2320/TS2590).
  - plane-box-select-tool: drop the redundant `IntrinsicElements extends
    ThreeElements` block — it duplicated R3F's global augmentation and, by
    referencing @react-three/fiber's ThreeElements directly, hit a bun peer-dep
    variant-directory duplicate under tsgo (TS2320). r3f.d.ts already covers
    those JSX intrinsics. Types-only — no runtime change.
- check-types -> tsgo --noEmit (editor, @repo/ui, editor app, ifc-converter app)
- emit-package dev watch -> tsgo --build --watch
- build/publish stay tsc --build (prepublishOnly + release.yml unchanged;
  emitted .d.ts is byte-identical to tsc output)
- bump next 16.2.6 -> 16.2.9

tsc remains the source of truth and fallback. Published artifacts unchanged.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/editor/package.json

@@ -8,7 +8,7 @@
     "build": "dotenv -e ../../.env.local -- next build",
     "start": "next start",
     "lint": "biome lint",
-    "check-types": "next typegen && tsc --noEmit"
+    "check-types": "next typegen && tsgo --noEmit"
   },
   "dependencies": {
     "@iconify/react": "^6.0.2",
@@ -25,7 +25,7 @@
     "clsx": "^2.1.1",
     "geist": "^1.7.0",
     "lucide-react": "^1.7.0",
-    "next": "16.2.6",
+    "next": "16.2.9",
     "postcss": "^8.5.6",
     "react": "^19.2.4",
     "react-dom": "^19.2.4",

apps/ifc-converter/package.json

@@ -11,7 +11,7 @@
     "build": "next build",
     "start": "next start",
     "lint": "biome lint",
-    "check-types": "next typegen && tsc --noEmit"
+    "check-types": "next typegen && tsgo --noEmit"
   },
   "dependencies": {
     "@pascal-app/core": "*",
@@ -23,7 +23,7 @@
     "@react-three/fiber": "^9.5.0",
     "@tailwindcss/postcss": "^4.2.1",
     "clsx": "^2.1.1",
-    "next": "16.2.6",
+    "next": "16.2.9",
     "postcss": "^8.5.6",
     "react": "^19.2.4",
     "react-dom": "^19.2.4",