perf: optimized gradientblinds

src/components/effects/GradientBlinds.tsx

@@ -330,7 +330,6 @@ void main() {
         uniforms.iMouse.value = [x, y];
       }
     };
-    window.addEventListener('pointermove', onPointerMove);
 
     const loop = (t: number) => {
       rafRef.current = requestAnimationFrame(loop);
@@ -364,11 +363,13 @@ void main() {
           lastTimeRef.current = 0;
           rafRef.current = requestAnimationFrame(loop);
         }
+        window.addEventListener('pointermove', onPointerMove);
       } else {
         if (rafRef.current) {
           cancelAnimationFrame(rafRef.current);
           rafRef.current = null;
         }
+        window.removeEventListener('pointermove', onPointerMove);
       }
     });
     observer.observe(container);