style(storybook): tidy CENTER, chart, org chart and SW story pages

- CENTER plain page layout and shorter reference demo notes (spec values
  moved to the CENTER README); chart specimen descriptions trimmed
- Org chart page names and previews; SW width rows follow the 30px frame
  margin (1980 / 1065 / 727px) and the SW tests match the current layout
- Story inventory regenerated and WORKING_CONTEXT updated

src/chart/line-chart.stories.tsx

@@ -23,22 +23,22 @@ export const Line: Story = {
       {/* Source order is the mobile order. 1024px: Curve | Curve + labels per row. 1200px: three columns, plain styles in the
           first row and their Dot + Label versions below. */}
       <StorySectionGrid className={chartGrid.pairs}>
-        <ChartSpecimen title="Curve" description="monotone · Dot 없음">
+        <ChartSpecimen title="Curve">
           <HMLineChart {...sampleLineCompare} curve="monotone" dots={false} label="월별 접수·완료 곡선형 선 차트(예시 데이터)" />
         </ChartSpecimen>
-        <ChartSpecimen title="Curve · Dot + Label" description="monotone · Dot과 값 Label">
+        <ChartSpecimen title="Curve · Dot + Label">
           <HMLineChart {...sampleLineCompare} curve="monotone" pointLabels label="월별 접수·완료 곡선형 Dot·값 라벨 선 차트(예시 데이터)" />
         </ChartSpecimen>
-        <ChartSpecimen title="Straight" description="linear · Dot 없음">
+        <ChartSpecimen title="Straight">
           <HMLineChart {...sampleLineCompare} curve="linear" dots={false} label="월별 접수·완료 직선형 선 차트(예시 데이터)" />
         </ChartSpecimen>
-        <ChartSpecimen title="Straight · Color Dot + Label" description="linear · Dot 개별 색상 + 값 Label">
+        <ChartSpecimen title="Straight · Color Dot + Label">
           <HMLineChart {...sampleLinePointColors} curve="linear" pointLabels label="월별 접수·완료 직선형 포인트별 색상 선 차트(예시 데이터)" />
         </ChartSpecimen>
-        <ChartSpecimen title="Step" description="step · Dot 없음">
+        <ChartSpecimen title="Step">
           <HMLineChart {...sampleLineCompare} curve="step" dots={false} label="월별 접수·완료 계단형 선 차트(예시 데이터)" />
         </ChartSpecimen>
-        <ChartSpecimen title="Step · Dot + Label" description="step · Dot과 값 Label">
+        <ChartSpecimen title="Step · Dot + Label">
           <HMLineChart {...sampleLineCompare} curve="step" pointLabels label="월별 접수·완료 계단형 Dot·값 라벨 선 차트(예시 데이터)" />
         </ChartSpecimen>
       </StorySectionGrid>