Here's a very valuable feature in terms of UX for #nostr clients, imo:

Consider that actions on nostr are final, clients should have a "cancel this action" / an x button for actions, that would be on by default.

Let's say the default value for this is 3 seconds.

This would make it so that, for example, if I accidentally liked a post, then I have 3 seconds to unlike it before it actually sends the like activity to relays.

In the options, I can either disable this or increase/decrease this value (less than 3s or more than).