feat: stage 2 real CAD conveyor, hybrid physics drops, mobile policy (WIP)

- CAD pipeline: conveer.FCStd -> FreeCAD headless -> conveyor-web.glb
  (555KB Draco, 42 named nodes) integrated into main scene; gates and
  rollers animated from domain state
- Domain-driven adapter sorterVisualState.ts; per-SKU visual physics
  profiles (VISUAL_PHYSICS_ESTIMATE)
- Hybrid Rapier physics: kinematic belt travel -> dynamic drop handoff
  -> verified freeze; shared collider layout (physicsWorldLayout) used
  by runtime and headless validation sim (physicsDropSim + 13 tests)
- Gravity chutes / open roll-cage front redesign (drop tuning in progress:
  4/7 routes verified headless)
- Premium industrial visual: PBR, ACES, PCFSoft shadows, Lightformer env,
  UI cleanup behind ?debug=1
- Mobile capability policy: SVG fallback / Mobile Low / full tiers,
  Telegram WebView forced to SVG, e2e stubs for weak devices
- Performance benchmarks cad-light/physics/full pass; stage2 artifacts

tsc clean. Physics drop validation for 3 SKU routes still in progress.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/stage2_real_sorter/performance-cad-full.json

@@ -0,0 +1,108 @@
+{
+ "profile": "cad-full",
+ "path": "/?perf=1&quality=demo",
+ "viewport": {
+  "width": 1920,
+  "height": 1080
+ },
+ "runs": 2,
+ "fpsAvg": 59.9,
+ "fpsMin": 28.49,
+ "frameTimeP95Ms": 17.2,
+ "drawCalls": 166,
+ "triangles": 365218,
+ "heapMb": 53.82,
+ "renderer": "ANGLE (NVIDIA Corporation, NVIDIA GeForce GTX 1080/PCIe/SSE2, OpenGL ES 3.2)",
+ "physics": {
+  "count": 600,
+  "avgMs": 0.0655000012119611,
+  "p95Ms": 0.19999998807907104,
+  "maxMs": 0.9000000357627869
+ },
+ "dropsVerified": [
+  {
+   "caseId": "box_b",
+   "zone": "B",
+   "inside": true
+  },
+  {
+   "caseId": "lunchbox_b",
+   "zone": "B",
+   "inside": true
+  }
+ ],
+ "device": {
+  "vendor": "Google Inc. (NVIDIA Corporation)",
+  "hardwareConcurrency": 6,
+  "deviceMemory": 16,
+  "devicePixelRatio": 1,
+  "viewport": {
+   "width": 1920,
+   "height": 1080
+  }
+ },
+ "consoleErrors": [],
+ "sceneLoadMs": 486.5,
+ "ctxLost": 0,
+ "modelRequests": [
+  "http://127.0.0.1:3101/models/sorter/conveyor-web.glb",
+  "http://127.0.0.1:3101/models/box-300.stl",
+  "http://127.0.0.1:3101/models/lunchbox.stl",
+  "http://127.0.0.1:3101/models/box-400.stl",
+  "http://127.0.0.1:3101/models/plate.stl",
+  "http://127.0.0.1:3101/models/bottle.stl",
+  "http://127.0.0.1:3101/models/pen.stl"
+ ],
+ "memoryLoop": [
+  {
+   "cycle": 1,
+   "heapBytes": 52565544,
+   "dropResults": 0
+  },
+  {
+   "cycle": 2,
+   "heapBytes": 35445133,
+   "dropResults": 0
+  },
+  {
+   "cycle": 3,
+   "heapBytes": 65863994,
+   "dropResults": 0
+  },
+  {
+   "cycle": 4,
+   "heapBytes": 38948871,
+   "dropResults": 0
+  },
+  {
+   "cycle": 5,
+   "heapBytes": 52642098,
+   "dropResults": 0
+  },
+  {
+   "cycle": 6,
+   "heapBytes": 51737094,
+   "dropResults": 0
+  },
+  {
+   "cycle": 7,
+   "heapBytes": 58675947,
+   "dropResults": 0
+  },
+  {
+   "cycle": 8,
+   "heapBytes": 53790182,
+   "dropResults": 0
+  },
+  {
+   "cycle": 9,
+   "heapBytes": 57980834,
+   "dropResults": 0
+  },
+  {
+   "cycle": 10,
+   "heapBytes": 54462476,
+   "dropResults": 0
+  }
+ ]
+}

docs/stage2_real_sorter/performance-cad-light.json

@@ -0,0 +1,51 @@
+{
+ "profile": "cad-light",
+ "path": "/?perf=1&quality=medium",
+ "viewport": {
+  "width": 1920,
+  "height": 1080
+ },
+ "runs": 2,
+ "fpsAvg": 59.9,
+ "fpsMin": 28.41,
+ "frameTimeP95Ms": 17.3,
+ "drawCalls": 112,
+ "triangles": 176789,
+ "heapMb": 30.8,
+ "renderer": "ANGLE (NVIDIA Corporation, NVIDIA GeForce GTX 1080/PCIe/SSE2, OpenGL ES 3.2)",
+ "physics": null,
+ "dropsVerified": [
+  {
+   "caseId": "box_b",
+   "zone": "B",
+   "inside": true
+  },
+  {
+   "caseId": "lunchbox_b",
+   "zone": "B",
+   "inside": true
+  }
+ ],
+ "device": {
+  "vendor": "Google Inc. (NVIDIA Corporation)",
+  "hardwareConcurrency": 6,
+  "deviceMemory": 16,
+  "devicePixelRatio": 1,
+  "viewport": {
+   "width": 1920,
+   "height": 1080
+  }
+ },
+ "consoleErrors": [],
+ "sceneLoadMs": 425,
+ "ctxLost": 0,
+ "modelRequests": [
+  "http://127.0.0.1:3101/models/sorter/conveyor-web.glb",
+  "http://127.0.0.1:3101/models/box-300.stl",
+  "http://127.0.0.1:3101/models/lunchbox.stl",
+  "http://127.0.0.1:3101/models/box-400.stl",
+  "http://127.0.0.1:3101/models/plate.stl",
+  "http://127.0.0.1:3101/models/bottle.stl",
+  "http://127.0.0.1:3101/models/pen.stl"
+ ]
+}

docs/stage2_real_sorter/performance-cad-physics.json

@@ -0,0 +1,56 @@
+{
+ "profile": "cad-physics",
+ "path": "/?perf=1&quality=high",
+ "viewport": {
+  "width": 1920,
+  "height": 1080
+ },
+ "runs": 2,
+ "fpsAvg": 60.010000000000005,
+ "fpsMin": 31.95,
+ "frameTimeP95Ms": 17.299999999999997,
+ "drawCalls": 168,
+ "triangles": 365442,
+ "heapMb": 53.57,
+ "renderer": "ANGLE (NVIDIA Corporation, NVIDIA GeForce GTX 1080/PCIe/SSE2, OpenGL ES 3.2)",
+ "physics": {
+  "count": 600,
+  "avgMs": 0.06783333351214726,
+  "p95Ms": 0.19999998807907104,
+  "maxMs": 0.3999999761581421
+ },
+ "dropsVerified": [
+  {
+   "caseId": "box_b",
+   "zone": "B",
+   "inside": true
+  },
+  {
+   "caseId": "lunchbox_b",
+   "zone": "B",
+   "inside": true
+  }
+ ],
+ "device": {
+  "vendor": "Google Inc. (NVIDIA Corporation)",
+  "hardwareConcurrency": 6,
+  "deviceMemory": 16,
+  "devicePixelRatio": 1,
+  "viewport": {
+   "width": 1920,
+   "height": 1080
+  }
+ },
+ "consoleErrors": [],
+ "sceneLoadMs": 553.5,
+ "ctxLost": 0,
+ "modelRequests": [
+  "http://127.0.0.1:3101/models/sorter/conveyor-web.glb",
+  "http://127.0.0.1:3101/models/box-300.stl",
+  "http://127.0.0.1:3101/models/lunchbox.stl",
+  "http://127.0.0.1:3101/models/box-400.stl",
+  "http://127.0.0.1:3101/models/plate.stl",
+  "http://127.0.0.1:3101/models/bottle.stl",
+  "http://127.0.0.1:3101/models/pen.stl"
+ ]
+}

docs/stage2_real_sorter/performance-mobile-fallback.json

@@ -0,0 +1,31 @@
+{
+ "profile": "mobile-fallback",
+ "path": "/",
+ "viewport": {
+  "width": 390,
+  "height": 844
+ },
+ "runs": 1,
+ "fpsAvg": null,
+ "fpsMin": null,
+ "frameTimeP95Ms": null,
+ "drawCalls": null,
+ "triangles": null,
+ "heapMb": null,
+ "renderer": null,
+ "physics": null,
+ "dropsVerified": [],
+ "device": null,
+ "consoleErrors": [],
+ "sceneLoadMs": 143,
+ "ctxLost": 0,
+ "modelRequests": [],
+ "fallback": {
+  "fallbackVisible": true,
+  "canvasCount": 0,
+  "ctxLost": 0,
+  "modelRequests": [],
+  "consoleErrors": [],
+  "sceneLoadMs": 143
+ }
+}