The new drag & drop APIs for macOS 26 are terrific, but there's an important missing piece. If I use draggable(containerItemID:), there's no way to provide a custom view for the drag image. Meanwhile the older API lets you provide a preview, but you miss out on things like multi-item drag and custom drag sessions. Is there some mechanism for supplying a preview that I'm not seeing? Without it, the drag interface in my apps is going to look terrible.
