viewer: re-attach DRACOLoader (was reverted by prior patch that used a stale local cache)

index.html

@@ -209,6 +209,7 @@
 import * as THREE from "three";
 import { OrbitControls } from "three/addons/controls/OrbitControls.js";
 import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
+import { DRACOLoader } from "three/addons/loaders/DRACOLoader.js";
 
 // Data comes from the class DATASETS (viewer/ GLBs + catalog). ?base=URL
 // overrides for local testing against a plain directory layout.
@@ -241,6 +242,9 @@ function resize() {
 addEventListener("resize", resize);
 
 const loader = new GLTFLoader();
+const dracoLoader = new DRACOLoader();
+dracoLoader.setDecoderPath("https://cdn.jsdelivr.net/npm/three@0.160.0/examples/jsm/libs/draco/");
+loader.setDRACOLoader(dracoLoader);
 let model = null;
 let rig = [];
 let grabMeshes = [];