I think it would be incredibly useful to have AI (local) scan my mail, determine if it is relevant (i.e., "This link will expire in 15 minutes", "This code will expire in 3 days", "Please respond to this unimportant within 5 days or a normal thing will happen..."), and delete it (or flag for deletion) for me.

I often read email, forget to delete it, and it piles up. Perhaps a good way to ensure irrelevance is to only take action on emails which are already read.

Give the user the option to either Archive it or Delete it.