Buttons, chips, toggles and the search input converge on --control-h
2rem with --text-xs shared, and .control becomes an inline-flex so
anchor text centres in the title-detail action bar. Chip colour is
untouched (#165 owns it). Verified in agent-browser at 1440px, 46rem
and 40rem; the release deck keeps its column widths and does not
scroll horizontally.