disable OrbitControls mouse interaction on 3D overlay canvas

Rotation, scale and FOV are now driven exclusively by the scrub buttons.
Disabling OrbitControls prevents the user from accidentally rotating the
model by dragging on the canvas. The controls instance is kept for
programmatic camera updates (onRotateDrag calls controls.update()).
Damping and the redundant controls.update() in the RAF loop are removed.

frontend/apps/artcraft/app/src/pages/PageDraw/components/Model3DOverlay.tsx

@@ -208,8 +208,7 @@ export const Model3DOverlay = React.forwardRef<Model3DOverlayHandle, Model3DOver
         params.cameraTarget.y,
         params.cameraTarget.z,
       );
-      controls.enableDamping = true;
-      controls.dampingFactor = 0.05;
+      controls.enabled = false; // interaction handled via scrub buttons
       controls.update();
       controlsRef.current = controls;
 
@@ -257,7 +256,6 @@ export const Model3DOverlay = React.forwardRef<Model3DOverlayHandle, Model3DOver
       // RAF loop
       const animate = () => {
         animFrameRef.current = requestAnimationFrame(animate);
-        controls.update();
         renderer.render(scene, camera);
       };
       animate();