Silver-gelatin Wet Lab production still, portrait: a translucent tool-selection gland rests on a black steel tray, held steady by two gloved hands. At its left, a narrow read-only key sits in a glass channel; above it, an oversized master-key socket hangs unused behind a numbered safety shutter. A real hex lattice forms the tray mesh. One short row of phosphor-green status vials is the only colour. Copper fittings, gauze, hard inspection light and deep near-black shadow. Add callouts to the least-privilege key, privilege selector and refusal membrane; strike one small circular Bureau seal lower right. A chipped office key fob lies beside the tray. Output in exactly 1122 x 1402 px, 4:5 portrait ratio.