Add bust_of_David OBJ+MTL model to 3D refinery showcase

src/components/ModelViewer.tsx

@@ -4,6 +4,12 @@ import { Upload, Box, Check, FileBox, Download, ArrowRight } from 'lucide-react'
 
 // Actual models from the workdir
 const showcaseModels = [
+  {
+    name: 'David Bust (OBJ+MTL)',
+    original: 'bust_of_David.obj + .mtl + .png (6.6 MB)',
+    processed: ['bust_of_David.glb (14 MB)', 'bust_of_David_web.glb (6 MB)'],
+    compression: 'OBJ+Texture → GLB with Draco'
+  },
   {
     name: 'Jogging Character',
     original: 'Jogging.fbx (1.8 MB)',