The "Composed of" panel above the preview is gone. It sat between the
title and the plugin and took the plugin's space; composition already
lives in the rail's "Inside <composite>" trees. The toolbar is back to
one line: name, element tag, Copy embed.
big-picture is no longer listed. It is a dark header of search plus four
filters over the people-groups grid, with the grid's own identical
controls switched off: in the studio it read as the grid a second time
under a misleading name. The real Big Picture is dashboard-plus-grid,
and the app shell already hides big-picture for the same reason. The
bundle is still built and embeddable. The studio's own composes list now
names dashboard-plus-grid instead of bp-big-picture.
