⚡ Bolt: Optimize GradientBlinds render loop

- Reuse array/object references for pointer coordinates to reduce GC.
- Remove getBoundingClientRect() from animation loop to prevent layout thrashing.

Co-authored-by: ragusa-it <196988693+ragusa-it@users.noreply.github.com>

src/components/effects/GradientBlinds.tsx

@@ -65,7 +65,7 @@ const GradientBlinds: React.FC<GradientBlindsProps> = ({
   const rendererRef = useRef<Renderer | null>(null);
   const mouseTargetRef = useRef<[number, number]>([0, 0]);
   // Optimization: store raw pointer position (viewport coords) to decouple event handling from calculation
-  const pointerPosRef = useRef<{ x: number; y: number } | null>(null);
+  const pointerPosRef = useRef<{ x: number; y: number; active: boolean }>({ x: 0, y: 0, active: false });
   const isMobileRef = useRef<boolean>(false);
   const lastTimeRef = useRef<number>(0);
   const firstResizeRef = useRef<boolean>(true);
@@ -304,7 +304,8 @@ void main() {
         const cx = gl.drawingBufferWidth / 2;
         const cy = gl.drawingBufferHeight / 2;
         uniforms.iMouse.value = [cx, cy];
-        mouseTargetRef.current = [cx, cy];
+        mouseTargetRef.current[0] = cx;
+        mouseTargetRef.current[1] = cy;
       }
     };
 
@@ -332,10 +333,13 @@ void main() {
           x = (e.clientX - rect.left) * scale;
           y = (rect.height - (e.clientY - rect.top)) * scale;
         }
-        mouseTargetRef.current = [x, y];
-        pointerPosRef.current = null; // Ensure loop doesn't override
+        mouseTargetRef.current[0] = x;
+        mouseTargetRef.current[1] = y;
+        pointerPosRef.current.active = false; // Ensure loop doesn't override
       } else {
-        pointerPosRef.current = { x: e.clientX, y: e.clientY };
+        pointerPosRef.current.x = e.clientX;
+        pointerPosRef.current.y = e.clientY;
+        pointerPosRef.current.active = true;
       }
     };
 
@@ -344,7 +348,7 @@ void main() {
       uniforms.iTime.value = t * 0.001;
 
       // Update target based on pointer position and scroll offset
-      if (pointerPosRef.current) {
+      if (pointerPosRef.current.active) {
         const scale = (renderer as unknown as { dpr?: number }).dpr || 1;
         let x, y;
 
@@ -355,13 +359,11 @@ void main() {
           const rectTop = rectRef.current.top - dy;
           x = (pointerPosRef.current.x - rectLeft) * scale;
           y = (rectRef.current.height - (pointerPosRef.current.y - rectTop)) * scale;
-        } else {
-           // Fallback if rectRef missing
-           const rect = canvas.getBoundingClientRect();
-           x = (pointerPosRef.current.x - rect.left) * scale;
-           y = (rect.height - (pointerPosRef.current.y - rect.top)) * scale;
+
+          mouseTargetRef.current[0] = x;
+          mouseTargetRef.current[1] = y;
         }
-        mouseTargetRef.current = [x, y];
+        // Removed costly getBoundingClientRect fallback; rectRef should exist.
       }
 
       if (mouseDampening > 0) {
@@ -376,8 +378,9 @@ void main() {
         cur[0] += (target[0] - cur[0]) * factor;
         cur[1] += (target[1] - cur[1]) * factor;
       } else {
-        if (pointerPosRef.current || isMobileRef.current) {
-          uniforms.iMouse.value = mouseTargetRef.current;
+        if (pointerPosRef.current.active || isMobileRef.current) {
+          uniforms.iMouse.value[0] = mouseTargetRef.current[0];
+          uniforms.iMouse.value[1] = mouseTargetRef.current[1];
         }
         lastTimeRef.current = t;
       }