fix: attached mouse event listener to window instead of canvas element

src/components/effects/GradientBlinds.tsx

@@ -312,7 +312,7 @@ void main() {
         uniforms.iMouse.value = [x, y];
       }
     };
-    canvas.addEventListener('pointermove', onPointerMove);
+    window.addEventListener('pointermove', onPointerMove);
 
     const loop = (t: number) => {
       rafRef.current = requestAnimationFrame(loop);
@@ -357,7 +357,7 @@ void main() {
 
     return () => {
       if (rafRef.current) cancelAnimationFrame(rafRef.current);
-      canvas.removeEventListener('pointermove', onPointerMove);
+      window.removeEventListener('pointermove', onPointerMove);
       observer.disconnect();
       ro.disconnect();
       if (canvas.parentElement === container) {