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/center/center-overview.stories.tsx

@@ -1,5 +1,5 @@
 import type { Meta, StoryObj } from "@storybook/react-vite"
-import { STORY_KICKER, StoryPage, StoryPageHeader, StorySection } from "@/components/story-page"
+import { StoryPage, StoryPageHeader, StorySection } from "@/components/story-page"
 import { CENTER_BOUNDARY, CenterFrame, SCALE_NOTE, StatusTable } from "./center-shared"
 
 // Mirrors the ui-viz docs/governance/center-domain.md §5 registry rows. The values stay in the owner documents.
@@ -28,13 +28,13 @@ export const Overview: Story = {
   name: "Overview",
   render: () => (
     <StoryPage>
-      <StoryPageHeader kicker={STORY_KICKER.center} title="Overview" description={CENTER_BOUNDARY} />
+      <StoryPageHeader title="Overview" description={CENTER_BOUNDARY} />
       <CenterFrame>
         <div className="sb-center-overview">
-          <StorySection title="Representation Scale" description="제작 해상도별 CENTER 그래픽 표시 배율입니다.">
+          <StorySection title="Representation Scale">
             <p className="sb-center-note">{SCALE_NOTE}</p>
           </StorySection>
-          <StorySection title="Status" description="ui-viz center-domain.md §5 registry의 항목별 상태와 이 Storybook에서의 표현입니다.">
+          <StorySection title="Status" description="항목별 확정 상태와 Storybook 표현">
             <div className="sb-center-scroll">
               <StatusTable rows={STATUS} />
             </div>