add multiple states to messages (sending, waiting, error, sent, new, seen)

[braid-sync]

Change messages in the client to be in one of the following states:

• sending
• waiting to retry
• error (manual resend)
• sent
• new
• seen

Display each state slightly differently.

Get rid of the global 'message not sent' error

Store message drafts to local-storage

Adjust the "disconnected" warning to not prevent typing of messages

[Ashe]

This might put a lot of strain on a server - in a server with hundreds of users, having processing power and storage dedicated to tracking which users have or haven't seen it would be expensive and potentially useless. If you go for a simpler 'if at least one person has seen it' approach, group conversations will suffer, so I think maybe it would be important to define when this system comes into play. Would be great for 1:1s definitely, and groups less than 10 or something too. But I can see this getting annoying.

Saying that, given that Braid is intended to be asynchronous, knowing if the other users are actually there or if they have been since you last messaged would be a good thing for everyone.