PluriRootHeader rendered its 56px title/actions row flush at y=0 on
every device, since app.dart's root SafeArea(top: false) deliberately
excludes the top inset (so each root's full-bleed background paints
edge-to-edge behind the status bar) but the header itself never added
MediaQuery.paddingOf(context).top anywhere. The header now wraps its
existing 56px content row in an outer top padding equal to that inset,
so total rendered height is height + topInset while `height` keeps
meaning the content row's own height (verified no call site did
total-height math against the old fixed constant).
FreeTLab
4d54908be6