The preset's When Player Opens setting only drove the landscape/floating
panel state, so on iPhone in portrait the details panel reappeared on
every player expansion regardless of the setting. Mirror the resolved
visibility into the portrait panel state, and seed it into the sheet's
initial state at all creation sites so the first frame already renders
the correct layout - applying it in onAppear animated a visible
top-to-center video jump during expansion. Portrait panel toggles now
also persist the last visibility so Remember Last works there too.
Reset isCommentsExpanded and commentsFrame on the NavigationCoordinator
directly when the portrait panel is dismissed, since PortraitDetailsPanel
owns its own @State that doesn't sync back through .onChange during dismiss.
Also track comments overlay frame via GeometryReader so the dismiss gesture
can allow swipes outside the comments area instead of blanket-blocking.