feat(sw): add step header process tokens and align docs

packages/ui/src/theme/lnb.css

@@ -1,5 +1,5 @@
 /* LNB pattern (layout visual reference: D:\컴포넌트\ui-viz Patterns/LNB, implementation: HM Collapsible + plain elements).
-   A 272px green column: horizontal 5-stop surface, brand on top, menu in the middle, text-only profile at the bottom. The current
+   A 240px green column (--hm-lnb-width; 272px before 2026-11-09): horizontal 5-stop surface, brand on top, menu in the middle, text-only profile at the bottom. The current
    item is a Beige face (left corners rounded) that runs to the content edge and joins it through two concave corners; hover is
    Black 10% to the same edge; an open group is a Black 8% face with a 1px green line. Spacing values are pattern-local. */
 :root, [data-hm-theme] {