Forwarding, message links and link previews

Forward sits in every message's hover strip. Pick a channel, a person or a thread, add a few words, and the message goes with its files, naming people and notifying them. Forward it to your assistant, and it becomes a request.

Copy link gives a permanent link to any message, and a pasted message link goes out as that message, forwarded. A site link gets a card with the site, title, description, picture and icon, and a picture or video link shows its preview.