{% comment %} The fields a step form posts, shared by "add" and "edit" so the two cannot drift. `step` is unset on the add form, and every default below is written so that the unset case reads as a sensible new step rather than as a blank one. The window's weekday checkboxes post a repeated `window_days`, which is what `views._window_from` reads with getlist — the same shape the flow builder's smart-delay panel uses, because it is the same object (SPEC §11.5). {% endcomment %}