To-dos open in a focused window

Tapping a to-do used to expand a panel right in the list, which showed the title twice and pushed everything around it. Now it opens in a focused window — a bottom sheet you can drag up on your phone, a centered card on desktop.

The title shows once and is editable there; your sub-steps, due date, and notes all sit together; and your list stays put behind it. Close it by tapping outside, the ×, or pressing Escape.