docs(storybook): simplify sidebar Story pages around the UI

Drop the category kicker from the 83 sidebar Stories (kicker is now optional;
hidden verification Stories keep it) and shorten or remove repeated, obvious
or internal page/section descriptions. Required specs, limits, virtual-data
and undecided-value notices stay. Story IDs, exports, fixtures, shared state
notes and package code are unchanged. Record: docs/reports/storybook-ui-simplification-2026-10-22.md

src/sw/sw-header-overview.tsx

@@ -131,7 +131,7 @@ export function SWHeaderOverview({ initial, fixtures, propertyGroups, propertyFi
   const weight = weights.find(item => item.id === weightId)
 
   return <StoryPage className="sw-story-overview">
-    <StoryPageHeader kicker="HM DESIGN SYSTEM / SW" title="SW Header" />
+    <StoryPageHeader title="SW Header" />
     {showVerificationControls() && <div className="sw-overview-toolbar" aria-label="Storybook 전용 미리보기 설정">
       <label htmlFor={`${controlId}-selection`}>선택 상태</label>
       <select id={`${controlId}-selection`} value={example} onChange={event => changeExample(event.target.value as Selection)}>