chore: preserve pre-cleanup product baseline

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

3d_models/sorter_mechanism.params.json

@@ -1,10 +1,11 @@
 {
-  "status": "SPEC_DERIVED_CAD",
+  "status": "DERIVED_CAD_FINAL",
   "notAuthorCad": true,
   "sourceOfDimensions": [
-    "src/domain/pusherMotion.ts PUSHER constants",
-    "docs/stage2_real_sorter/mechanism-map.md",
-    "PusherMechanism.tsx visual housing sizes"
+    "src/domain/pusherMotion.ts PUSHER.halfExtents / stroke / yaw",
+    "src/domain/physicalLayout.ts CONVEYOR_WIDTH_M=0.5 BELT_TOP_Y=0.7",
+    "conveyor-clean.glb belt half-width z±0.25 m",
+    "max item envelope 450×320×320 mm (demo oversize height 400 mm)"
   ],
   "units": "mm",
   "paddle": {
@@ -27,54 +28,142 @@
   "strokeMm": 1620,
   "yawDeg": 20.4,
   "homeDistanceMm": 400,
-  "glb": "public/models/sorter/mechanism-web.glb",
+  "localFrame": "X=width Y=height Z=thickness (−Z contact)",
+  "glb": "public/models/sorter/mechanism-final.glb",
+  "mountGlb": "public/models/sorter/mechanism-mount-final.glb",
   "step": "3d_models/sorter_mechanism.step",
   "parts": [
     {
       "name": "paddle-plate",
-      "triangles": 12,
-      "stl": "paddle-plate.stl"
-    },
-    {
-      "name": "rib-l",
-      "triangles": 12,
-      "stl": "rib-l.stl"
-    },
-    {
-      "name": "rib-c",
-      "triangles": 12,
-      "stl": "rib-c.stl"
-    },
-    {
-      "name": "rib-r",
-      "triangles": 12,
-      "stl": "rib-r.stl"
-    },
-    {
-      "name": "servo-body",
-      "triangles": 96,
-      "stl": "servo-body.stl"
-    },
-    {
-      "name": "servo-shaft",
-      "triangles": 64,
-      "stl": "servo-shaft.stl"
-    },
-    {
-      "name": "bracket",
-      "triangles": 12,
-      "stl": "bracket.stl"
-    },
-    {
-      "name": "housing",
-      "triangles": 12,
-      "stl": "housing.stl"
+      "triangles": 12
     },
     {
       "name": "leading-edge",
-      "triangles": 12,
-      "stl": "leading-edge.stl"
+      "triangles": 12
+    },
+    {
+      "name": "rib-l",
+      "triangles": 12
+    },
+    {
+      "name": "rib-c",
+      "triangles": 12
+    },
+    {
+      "name": "rib-r",
+      "triangles": 12
+    },
+    {
+      "name": "carriage",
+      "triangles": 12
+    },
+    {
+      "name": "bearing-l",
+      "triangles": 12
+    },
+    {
+      "name": "bearing-r",
+      "triangles": 12
+    },
+    {
+      "name": "actuator-rod",
+      "triangles": 80
+    },
+    {
+      "name": "clevis",
+      "triangles": 12
+    },
+    {
+      "name": "servo-body",
+      "triangles": 96
+    },
+    {
+      "name": "servo-shaft",
+      "triangles": 64
+    },
+    {
+      "name": "bracket-l",
+      "triangles": 12
+    },
+    {
+      "name": "bracket-l-foot",
+      "triangles": 12
+    },
+    {
+      "name": "bracket-r",
+      "triangles": 12
+    },
+    {
+      "name": "bracket-r-foot",
+      "triangles": 12
+    },
+    {
+      "name": "housing",
+      "triangles": 12
+    },
+    {
+      "name": "cheek-l",
+      "triangles": 12
+    },
+    {
+      "name": "cheek-r",
+      "triangles": 12
     }
   ],
-  "sha256_glb": "eb973217d4ec7288f784d93e6f539b4f3d29fb3163d6788b5467c97451588ed6"
+  "mountParts": [
+    {
+      "name": "post-n",
+      "triangles": 12
+    },
+    {
+      "name": "post-n-base",
+      "triangles": 12
+    },
+    {
+      "name": "post-n-clamp",
+      "triangles": 12
+    },
+    {
+      "name": "post-s",
+      "triangles": 12
+    },
+    {
+      "name": "post-s-base",
+      "triangles": 12
+    },
+    {
+      "name": "post-s-clamp",
+      "triangles": 12
+    },
+    {
+      "name": "crossbeam",
+      "triangles": 12
+    },
+    {
+      "name": "rail-c",
+      "triangles": 12
+    },
+    {
+      "name": "rail-c-cylinder",
+      "triangles": 80
+    },
+    {
+      "name": "rail-d",
+      "triangles": 12
+    },
+    {
+      "name": "rail-d-cylinder",
+      "triangles": 80
+    },
+    {
+      "name": "drive-housing",
+      "triangles": 12
+    },
+    {
+      "name": "drive-housing-yellow",
+      "triangles": 12
+    }
+  ],
+  "sha256_glb": "77c96b92e9f615a9124d2255927d9d7dbaf28eee28e0f4d956755c2d37a1f4c0",
+  "bytes": 22512
 }