Inbox 4 block design & features
Inbox4 is a project mailbox built with shadcn/ui Input and Scroll Area. The side column is titled Project Mail and switches mailboxes. Search matches the sender, subject, preview, and company inside the active mailbox.
The list shows the sender portrait, subject, and preview. Choosing a message is wired for a detail view.
This is a mail index. The mailbox switcher is the distinctive control. Content-driven: it needs senders, subjects, and a mailbox for each message.
On a narrow screen the mailbox column hides and the list uses the full width.