The 16dp a grouped list keeps from the screen edge was a private literal in GroupedRow, so everything that sits outside the cards but belongs to them — section headers, hints, picker descriptions — had to repeat the number and had quietly drifted to 24dp in places, leaving pages with two ragged left margins. Exporting it gives those callers the one value to take. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>