Function PostRow 

fn PostRow(props: PostRowProps) -> impl IntoView

表格的一行。标题进入后台预览（保留列表来源与侧栏）；「⋯」菜单回传操作 id。

Required Props

• post: PostListItem
• selected: impl Into<Signal<bool>>
• busy: impl Into<Signal<bool>>
• on_select: [impl Into<Callback<(i32, bool)>>](Callback<(i32, bool)>)
• on_action: [impl Into<Callback<(PostListItem, &'static str)>>](Callback<(PostListItem, &’static str)>)