The panel used three CSS variables the kit never defines, so its borders,
hover fills and dimmed text were silently dropped — the two columns had no
visible edge. Use the real tokens.

Around that, name the section and keep its controls with the list they act
on: a title and one-line explanation, then a list pane (search, area
filter, New, count) and a document pane, each a bordered surface. Rows get
a caret and hover/focus states; the reading pane shows a loader while the
next entry travels, moves the read-only marker into the meta line, and
swaps Delete for the kit's icon-only button. The editor uses the whole
column instead of the kit's 600px control cap.