Split Inbox Chat Block for Radix UI

The six conversations and the sample replies are typed in START and REPLIES, and moves and sends only change state: nothing is saved or sent. Save the section in move, send the message in post, and replace the reply with your inbox's own; the counts, the unread total and every preview are derived from the conversations.

It moves that conversation to the other section ("Move to Other" or "Move to Primary"), keeps it where it was in list order, re-derives the counts in both headings and says so in the status line. There is no undo here: that lives in a conversation list with Undo. Focus lands on the moved row.

It filters both sections by name and by preview as you type, ignoring case; the section headings count the matches, and a section with none says "No match in Primary." The window keeps its height.

Opening a row. A reply that lands in a conversation you aren't looking at adds one, and the unread total in the list header is the sum of the rows.

One pane at a time: the list first, then the thread when you open a row, with a Back button that returns to the list and focuses the row you left. The window keeps its height and the status line stays visible on both views.

Yes. The list sits at the start side, the menu and times sit at the end of each row, the back and send arrows flip, and names and previews sit in isolated runs.