function updateExtendDom() {
        const playerUUidList = jessibucaMulti.getWindowUuidList();
        playerUUidList.forEach((uuid, index) => {
            const playerItem = jessibucaMulti.getWindowItem(uuid);
            const player = playerItem.player;
            if (player) {
                player.setExtendHtml(`<div style="color: red;position: absolute;left: 20px;top: 20px;font-size: 16px">
                                        <span>排序Index：${playerItem.order || playerItem.index}</span>
 