优化最终视频播放卡顿问题

components/pages/work-flow/media-viewer.tsx

@@ -309,6 +309,8 @@ export function MediaViewer({
               autoPlay={isFinalVideoPlaying}
               loop
               playsInline
+              preload="metadata"
+              poster={`${finalVideo.url}?vframe/jpg/offset/1`}
               onLoadedData={handleFinalVideoLoaded}
               onPlay={() => setIsFinalVideoPlaying(true)}
               onPause={() => setIsFinalVideoPlaying(false)}