Check it out at https://nostrgram.co/

* Direct messages support all of the normal note editor functions (media uploading and recording of audio/video in-app).

* By default pressing Enter in Direct Messages sends the message (this can be disabled in Settings ⚙️)

* Only the most recent messages are loaded in a conversation, but scrolling up auto-loads more so you can review message history

* Preview of last message sent/received is displayed in the recipients list on the side

Got too excited and hit Send before I should have on the first update lol