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/alert.stories.tsx

@@ -2,7 +2,7 @@ import type { Meta, StoryObj } from "@storybook/react-vite"
 import { InfoIcon, TriangleAlertIcon } from "lucide-react"
 import { Alert, AlertDescription, AlertTitle } 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/Feedback/Alert",
@@ -27,9 +27,8 @@ export const All: Story = {
   render: () => (
     <StoryPage>
       <StoryPageHeader
-        kicker={STORY_KICKER.components}
         title="Alert"
-        description="화면 안에 놓이는 인라인 메시지입니다(Toast 아님). variant는 default(neutral)와 destructive만 두며 닫기 동작은 없습니다."
+        description="인라인 메시지(Toast 아님) · default / destructive만 · 닫기 없음"
       />
       <StorySection title="Overview">
         <StateBoard
@@ -67,7 +66,7 @@ export const All: Story = {
           ]}
         />
       </StorySection>
-      <StorySection title="Usage" description="아이콘 없음, 제목만, 긴 내용 구성입니다.">
+      <StorySection title="Usage">
         <StateBoard
           min={320}
           states={[