The calm Gmail twin: unread is weight, never a badge count; sources are tinted dots; undo is real — the op only sends when the window closes.
unread thread in the personal mailbox (its tint)
read + starred, work mailbox (second tint): the star toggles; hover or keyboard focus shows Archive · Trash · Mark unread
one mailbox: the dot means unread; the bar is the j/k keyboard cursor
thread body loading
No badge counts, no priority tabs — unread is WEIGHT, sources are tinted dots, stars are amber. A writable row carries its own star and, on hover or keyboard focus, Archive · Trash · Mark read; a long press on touch opens the same actions in a sheet. Archive and trash hide the thread instantly and show a 5s undo; the server op is only sent when the window closes, so the journal records what actually happened.