Exiting native fullscreen from the corner layout restores the panels, and
the controls view read that as a floating details panel opening: it set a
hide override and ignored mouse movement for as long as the panel stayed
visible, so hovering the video no longer showed the controls. Only a
floating (unpinned) panel covers the video, so the flag now excludes
pinned panels, matching the existing widescreen rule. Corner panels are
pinned, so the fullscreen restore and the title-tap toggle keep the
controls responsive to hover.