修复首页视频卡顿问题

components/video-grid-layout.tsx

@@ -111,7 +111,7 @@ function VideoGridLayoutComponent({ videos, onEdit, onDelete }: VideoGridLayoutP
               loop
               muted={isMuted[video.id] !== false} // 默认静音，除非明确设置为false
               playsInline
-              preload="auto"
+              preload="none"
               poster={`${video.url}?vframe/jpg/offset/1`}
               onLoadedData={() => {
                 // 设置默认音量

components/video-screen-layout.tsx

@@ -197,7 +197,7 @@ function VideoScreenLayoutComponent({ videos }: VideoScreenLayoutProps) {
                 loop
                 muted={index === currentIndex ? isMuted : true} // 只有当前视频受状态控制
                 playsInline
-                preload="auto"
+                preload={`${index === currentIndex ? 'auto' : 'none'}`}
                 poster={`${video.url}?vframe/jpg/offset/1`}
                 onLoadedData={() => {
                   if (index === currentIndex && videoRefs.current[index]) {