I just zapped #[1] 88 sats by using Damus on my iPhone to send myself this DM: "zap 88->jb55 hi there".
This worked because more-speech, which I have running on my laptop, will do the zap for me if it recieves a DM from myself to myself (an auto-dm) with that message format.
It seems to me that every desktop client could be set up this way. Then, when you use your phone you can DM yourself with a zap request and your desktop client will do the job for you.
To make this easy Damus, and other mobile apps, could allow users to create message templates. Something like: "zap {amount}-{user} {comment}". Such a template could be invoked with a single button push. It could pop up a dialog asking for the variables and then send it as a auto-dm.