feat: add main feature module selection

src/world/debug/TestScene.tsx

@@ -2,8 +2,8 @@ import { useRef } from "react";
 import * as THREE from "three";
 import { Physics, RigidBody, CuboidCollider } from "@react-three/rapier";
 import { GrabbableObject } from "@/components/three/GrabbableObject";
+import { MainFeatureZone } from "@/components/three/MainFeatureZone";
 import { TriggerObject } from "@/components/three/TriggerObject";
-import { AnimatedModel } from "@/components/three/AnimatedModel";
 import {
   TEST_SCENE_FLOOR_COLLIDER_HALF_EXTENTS,
   TEST_SCENE_FLOOR_POSITION,
@@ -86,14 +86,17 @@ export function TestScene({
             />
           </mesh>
         </TriggerObject>
+
+        <MainFeatureZone />
       </Physics>
 
+      {/* Temporary: re-enable when Git LFS downloads are available again.
       <AnimatedModel
         modelPath="/models/elec/model.gltf"
         defaultAnimation="Idle"
         position={[0, 0, -5]}
         scale={1}
-      />
+      /> */}
     </>
   );
 }