Merge origin/main into feat/placement-interaction-overhaul

Resolve 7 conflicts keeping our snapping migration + floorplan perf work as
source of truth, combined with main's MEP run-continuation / Alt-detach /
latch handles. Rebuilt two import blocks the auto-merge silently truncated
(node-arrow-handles.tsx, duct-fitting/move-tool.tsx).

Verified: tsc clean across core/viewer/editor/nodes/mcp, 451 tests pass,
biome clean. Floorplan view-transform re-render storm confirmed pre-existing
(not introduced by this merge).

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

apps/editor/README.md

@@ -7,7 +7,7 @@ A 3D building editor built with React Three Fiber and WebGPU.
 This is a Turborepo monorepo with three main packages:
 
 ```
-editor-v2/
+editor/
 ├── apps/
 │   └── editor/          # Next.js application (this package)
 ├── packages/

apps/editor/components/build-tab.tsx

@@ -172,7 +172,8 @@ export function BuildTab() {
   const ductContext =
     mode === 'build' && (activeTool === 'duct-segment' || activeTool === 'duct-fitting')
   const pipeContext =
-    mode === 'build' && (activeTool === 'pipe-segment' || activeTool === 'pipe-fitting')
+    mode === 'build' &&
+    (activeTool === 'pipe-segment' || activeTool === 'pipe-fitting' || activeTool === 'pipe-trap')
   const liquidLineContext = mode === 'build' && activeTool === 'liquid-line'
 
   const isMepItemActive = (item: MepItem) =>
@@ -445,6 +446,30 @@ export function BuildTab() {
                 />
                 Add Fitting
               </button>
+              <button
+                className={cn(
+                  'flex items-center gap-2 rounded-lg px-3 py-2 text-sm transition-all duration-200',
+                  activeTool === 'pipe-trap'
+                    ? 'bg-primary/10 ring-1 ring-primary/50'
+                    : 'bg-muted/40 hover:bg-muted',
+                )}
+                onClick={() => {
+                  triggerSFX('sfx:menu-click')
+                  activateBuildTool(activeTool === 'pipe-trap' ? 'pipe-segment' : 'pipe-trap')
+                }}
+                onMouseEnter={() => triggerSFX('sfx:menu-hover')}
+                type="button"
+              >
+                <Image
+                  alt=""
+                  aria-hidden
+                  className="size-4 object-contain"
+                  height={16}
+                  src="/icons/dwv-pipes.png"
+                  width={16}
+                />
+                Add Trap
+              </button>
             </div>
           ) : null}
 

apps/editor/components/viewer-toolbar.tsx

@@ -119,11 +119,12 @@ const levelModeLabels: Record<string, string> = {
   solo: 'Solo',
 }
 
-const wallModeOrder = ['cutaway', 'up', 'down'] as const
+const wallModeOrder = ['cutaway', 'up', 'down', 'translucent'] as const
 const wallModeConfig: Record<string, { icon: string; label: string }> = {
   up: { icon: '/icons/room.webp', label: 'Full height' },
   cutaway: { icon: '/icons/wallcut.webp', label: 'Cutaway' },
   down: { icon: '/icons/walllow.webp', label: 'Low' },
+  translucent: { icon: '/icons/wall.webp', label: 'Translucent' },
 }
 
 const SHADING_OPTIONS = [

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/components/PreviewToolbar.tsx

@@ -14,7 +14,7 @@ import { Box, Grid2x2, Layers, Layers2, Maximize, ScanLine, Square } from 'lucid
 import { type ReactNode, useMemo } from 'react'
 
 const levelModes = ['stacked', 'solo', 'exploded', 'manual'] as const
-const wallModes = ['up', 'cutaway', 'down'] as const
+const wallModes = ['up', 'cutaway', 'down', 'translucent'] as const
 
 const levelLabel: Record<(typeof levelModes)[number], string> = {
   stacked: 'Stack',
@@ -27,6 +27,7 @@ const wallLabel: Record<(typeof wallModes)[number], string> = {
   up: 'Full',
   cutaway: 'Cutaway',
   down: 'Down',
+  translucent: 'Translucent',
 }
 
 function cycle<T>(list: readonly T[], current: T): T {

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",