{{/* Application shell: the member rail. Pipeline: server.Shell. Task destinations only, then the surface switch ("Operator panel", operators only) as the one separated non-section entry (chrome-conventions "The surface switch is a visible, mirrored rail entry"). The same element is the static 15rem rail at lg and up and a Bootstrap offcanvas drawer below, opened from the top bar's toggler; shell.js closes the drawer when an entry is chosen. Session controls never render here; they live in the top bar's account menu. */}}