docs: about copy

src/commandpalette/language/en-GB/Translations.multids

@@ -34,7 +34,7 @@ Help/Help/Description: Usage of the command menu, describes what the command men
 Help/Filter/Caption: Filters
 Help/Filter/Description: A two-step process, first search for a preset filter or a customized filter, enter to confirm the selection; then continue to search in the filter results, enter to open the tiddler. In the second step, only user tiddlers are searched by default, and system tiddlers can be included by adding a prefix to the system entry search.
 Help/User/Caption: User tiddlers
-Help/User/Description: Not prefixed, just typed, you can search for the title and content of your tiddlers.
+Help/User/Description: Not prefixed, just typed, you can search for the title and content of your tiddlers. Enter to select (currently mouse isn't available), Ctrl + Enter will copy the selected content to the clipboard, easy to paste.
 Help/System/Caption: System tiddlers
 Help/System/Description: Searches for individual micro-system features such as available system messages, layouts, settings, etc.
 Help/Tags/Caption: Tags

src/commandpalette/language/zh-Hans/Translations.multids

@@ -34,7 +34,7 @@ Help/Help/Description: 命令菜单用法，介绍在搜索框里加上不同前
 Help/Filter/Caption: 筛选器
 Help/Filter/Description: 分为两步，首先搜索预置筛选器或自定义筛选器，回车确认选中；然后在筛选结果中继续搜索，回车打开条目。第二步里，默认只搜索用户条目，可加上系统条目搜索的前缀来包括系统条目。
 Help/User/Caption: 用户条目
-Help/User/Description: 什么前缀也不加，直接打字，可以搜索你的条目的标题和内容。
+Help/User/Description: 什么前缀也不加，直接打字，可以搜索你的条目的标题和内容。回车选中（目前无法用鼠标选中），Ctrl+回车会复制选中的内容到剪贴板，方便黏贴。
 Help/System/Caption: 系统条目
 Help/System/Description: 带有这个前缀时，可以搜索各太微系统功能，如可用的系统消息、布局、设置等。
 Help/Tags/Caption: 标签