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/avatar.stories.tsx

@@ -1,7 +1,7 @@
 import type { Meta, StoryObj } from "@storybook/react-vite"
 import { Avatar, AvatarFallback, AvatarImage } 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"
 
 // Images are inline data URIs so the Story does not depend on the network. "Broken" uses an address that cannot load so the
 // Radix fallback shows. Radix renders the image only after it loads.
@@ -86,13 +86,12 @@ export const All: Story = {
   render: () => (
     <StoryPage>
       <StoryPageHeader
-        kicker={STORY_KICKER.components}
         title="Avatar"
-        description="사용자를 나타내는 원형 이미지입니다. 이미지를 불러오지 못하면 fallback 글자를 표시합니다."
+        description="이미지 실패 시 fallback 글자"
       />
       <StorySection title="Overview">{board("image")}</StorySection>
       <StorySection title="States">{board("fallback")}</StorySection>
-      <StorySection title="Usage" description="이름·소속과 함께 쓰는 소비 조합입니다.">{board("composition")}</StorySection>
+      <StorySection title="Usage">{board("composition")}</StorySection>
     </StoryPage>
   ),
 }