settingsSectionHeader(_:)

@MainActor func settingsSectionHeader(_ title: LocalizedStringKey) -> some View

Single source of truth for the section headers that sit above settings cards. Sentence case only. Drawn like a grouped Form's section header: bold, primary ink, on the row text column of the card beneath it.

Inside a DropletSettingsPane put it in the header of a DropletSettingsSection; there it is the plain Text a grouped Form styles itself (13pt semibold, on the row column), with no font and no inset of its own. Outside one it draws that same header by hand.