Improve mentions

[Giszmo]

As Coracle supports editing the mentions:
Average Joe has no clue about the difference between

• @<somebody>: somebody gets mentioned in a p-tag, triggering a notification
• nostr:<somebody's npub>: somebody only gets mentioned in the body of the text but not in a p-tag, avoiding a notification
• nostr:<somebody's npub> plus p-tag: Some advocate for this approach to not use different formats in the content

Coracle already lists the p-tag mentions resulting from the thread, allowing the user to delete them but there are issues:

• the user cannot add p-tag mentions. For example if he decided to remove some from the list, he can't add them back.
• the user can't reference profiles without notifications easily

I suggest to

• add profiles to the mentions-box as the user mentions them using the "@" syntax
• show each mention with a 🔈 symbol instead of the ❌
• clicking the 🔈 turns it into 🔇 (and puts it to the end of the list, so the user can quickly mute many without moving the mouse)
• user can enter further mentions in the mentions box that get added via p-tags without being referenced in the text

[staab]

I think it's ok as is. Coracle converts inline npubs to p tags anyhow following approach #3, so use case #2 isn't supported. So if someone wants to mention someone they can just @ them at the bottom of the note, which is idomatic. Maybe @dtonon disagrees, but I think this is ok.

[dtonon]

I agree with @staab, the average Joe mentions using @, so he should not be worried by any other format.

Adding the possibility to notify without a visible mention doesn't seem so useful, for the mentioned user can be counterintuitive (he cannot see himself in the message) and it's prone to spam behaviors.

But I agree that the removal interface can be improved a little with a toggle style, to permit adding back a user removed by error. @Giszmo UX specs for this are okay.