你好 
实际上有一个优雅的解决方案，可以将“创建新主题”按钮变成一个下拉菜单。Convert the New Topic button to a have a sub menu - #7 by awesomerobot
看起来这个主题组件版本在这里可用：GitHub - discourse/discourse-new-topic-dropdown: Turns the New Topic button into a dropdown with a custom option added
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