- Same 560px width, same header layout (close | icon+title | open | fav | copy | more) - Header uses peek-header class from library CSS for identical styling - Meta info (type, size, date) moved inline into body as subtle header - Tags moved inline into body below meta - More menu with Open, Favorite, Copy link, Close actions - Copy link button uses navigator.clipboard API with toast feedback - Bottom action buttons removed (now in header + more menu) - Empty state matches library (file icon + 'Select a file to preview')