Tabs became kit chips (aria-pressed selected state, plain count inside),
empty states became GnEmptyState, action/refresh/close icon buttons moved
to kit btn-icon / GnIconButton, list badges to kit .badge variants. List
rows dropped the filled-box look for the kit idiom: subtle hover fill and
a left accent bar with panel-muted fill for the selected row. Header is
now stretchable so wrapped chips don't clip. Raw hexes and font literals
replaced with --gn-* tokens.