AboutCard drew its own Surface, so it could only stand alone. Taking a Position and rendering through GroupedSurface lets it be the top of a group with rows continuing underneath — for apps whose call to action reads better as a row of its own than as a tonal button inside the card. Defaults to Position.Alone, so existing callers are unchanged. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>