[UIPKGE] Three-pane mail surface. Left rail: Compose button, folders (Inbox/Starred/Sent/Drafts/Spam/Trash) with unread counts, colour-coded labels with totals. Middle: searchable message list with sender, subject, preview, labels, attachment glyphs, star toggle, smart timestamps. Right: reader pane with sub
pnpm dlx shadcn@latest add "https://registry.directory/r/uday-a/inbox.json"