Channels › Website Chat now lays out Widget Studio by the room it is given, not by the window. On a 1024–1280 px laptop with the menu open, the editor no longer shrinks to a narrow strip: the steps move to a row on top and the editor sits beside the preview, or above it when there is less room.
On shorter screens the preview shrinks to fit, so the open chat window and the phone frame are no longer cut off. In dark mode the active step, the chosen options and Publish & get the code keep their colours.