fix: correct timeout type for browser environment

src/app/page.tsx

@@ -24,12 +24,12 @@ export default function Home() {
 
   useEffect(() => {
     // 添加防抖处理，减少状态更新频率
-    let timeoutId: NodeJS.Timeout;
+    let timeoutId: number | undefined;
     
     const handleMouseMove = (e: MouseEvent) => {
       // 使用防抖，每16ms更新一次（约60fps）
       clearTimeout(timeoutId);
-      timeoutId = setTimeout(() => {
+      timeoutId = window.setTimeout(() => {
         setMousePosition({ x: e.clientX, y: e.clientY });
       }, 16);
     };
@@ -38,7 +38,9 @@ export default function Home() {
     
     return () => {
       window.removeEventListener('mousemove', handleMouseMove);
+      if (timeoutId) {
         clearTimeout(timeoutId);
+      }
     };
   }, []);