Revert "perf(viewer): redraw the orientation gizmo only when orientation/hover changes"

This reverts commit 8ce6db8.

Author: Krande

src/frontend/src/components/viewer/sceneHelpers/OrientationGizmo.ts

@@ -240,18 +240,6 @@ export class OrientationGizmo extends HTMLElement {
     }
 
     update() {
-        // The gizmo is a 2D canvas (drawImage/fillText/fillRect). Redrawing it on
-        // every animation frame pegs the main thread on low-core mobile (Samsung
-        // S21 etc.) and competes with model loading. Skip the redraw unless the
-        // camera orientation or the hover position actually changed.
-        const q = this.camera.quaternion;
-        const m = this.mouse;
-        const sig =
-            q.x.toFixed(4) + "," + q.y.toFixed(4) + "," + q.z.toFixed(4) + "," + q.w.toFixed(4) +
-            "|" + (m ? Math.round(m.x) + "," + Math.round(m.y) : "-");
-        if (sig === this._drawSig) return;
-        this._drawSig = sig;
-
         this.clear();
 
         // Calculate the rotation matrix from the camera