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嵌入卡很棒。但通常它们加载缓慢，这意味着用户在卡片呈现之前看到一个空白区域。它可能会让用户认为在 embledy-card 将要显示的空白区域中不会出现任何内容。如何在卡片加载时显示加载动画 gif 或仅显示纯文本消息？