New in Dock: file cards, and Dock for desktop 1.2.3
Files in chats are tidy cards now; in the desktop app they download to your Downloads folder and open from the card.

What's new
Files as cards
A file in a chat shows as a card with its type, name and size. Long names keep their extension visible, so you can tell report-final.pdf from report-final.xlsx at a glance.
Open and Show in Finder, in the desktop app
In Dock for desktop, a file downloads straight to your Downloads folder. The card then offers Open and Show in Finder (Show in folder on Windows), so you never hunt for it.

Improved
Cmd+W keeps Dock running
On a Mac, Cmd+W or the red close button now hides Dock instead of quitting, so your messages and notifications keep coming. Cmd+Q quits.
Fixed
- Mac: the window buttons no longer cover the sidebar button or your avatar.