feat(storybook): refine Manager LNB, HM Color and Patterns/Layout/LNB

- Manager LNB: 246px width, 16px brand title, 14px/700 menu and section
  titles, depth1 48px / depth2+ 42px rows, 24px section gap
- Foundation: rename Color to HM Color (Story ID foundation-color--all kept),
  remove Company Colors subtitle and the page-title bottom border
- Patterns/Layout/LNB: Storybook-only overrides in lnb.stories.css
  (240px column, 212px min width, 14px menu, 48/42px rows, profile text,
  group dividers); representative board dividers per section
- Sync story inventory and docs (brand-color-steps, lnb); shared package
  defaults and tokens are unchanged

.storybook/qa/story-inventory.json

@@ -3637,13 +3637,13 @@
     },
     {
       "file": "src/foundation/color.stories.tsx",
-      "title": "Foundation/Color",
+      "title": "Foundation/HM Color",
       "metaTags": [],
       "stories": [
         {
           "id": "foundation-color--all",
           "exportName": "All",
-          "name": "Color",
+          "name": "HM Color",
           "storyTags": [],
           "effectiveTags": [],
           "category": "PRIMARY",