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/components/separator.stories.tsx

@@ -1,7 +1,7 @@
 import type { Meta, StoryObj } from "@storybook/react-vite"
 import { Separator } from "@hm-design/ui"
 import { StateBoard } from "@/components/story-board"
-import { STORY_KICKER, StoryPage, StoryPageHeader, StorySection } from "@/components/story-page"
+import { StoryPage, StoryPageHeader, StorySection } from "@/components/story-page"
 
 const meta = {
   title: "Components/Data & Display/Separator",
@@ -26,9 +26,8 @@ export const All: Story = {
   render: () => (
     <StoryPage>
       <StoryPageHeader
-        kicker={STORY_KICKER.components}
         title="Separator"
-        description="콘텐츠 사이를 나누는 선입니다. 제목과 설명을 하나의 묶음으로 두고 구분선은 묶음 뒤 한 곳에 사용합니다. 기본은 장식용(decorative)입니다."
+        description="구분선은 묶음 뒤 한 곳 · 기본 decorative"
       />
       <StorySection title="Overview">
         <StateBoard