feat(storybook): add shared SW notice and refine SW previews

- Add StoryNotice and a withSWNotice decorator so every visible SW Story
  shows the common notice above its title; non-SW Stories are unaffected.
- Align the SW Header overview with the common SW Story page layout, let the
  preview Stage fill the available width and keep inner scroll on narrow screens.
- Rename SW/Footer to SW/하단 명령어바 (sidebar title only, Story IDs fixed via
  id: "sw-footer"), drop the top SWHeader from its preview and lower the
  workspace height bounds by the removed 49px.

src/sw/sw-footer-stories.css

@@ -3,8 +3,9 @@
 .sw-footer-story-screen { position: relative; display: flex; flex-direction: column; background: #060606; }
 .sw-footer-story-canvas { position: relative; background: var(--sw-story-canvas); }
 /* 2026-10-22: the workspace fits the viewport under the page title (720px at most), so the page itself does not
-   scroll where there is room; a short window keeps 480px and the page scrolls instead of clipping. */
-.sw-footer-story-workspace { display: flex; flex-direction: column; height: clamp(480px, calc(100dvh - 210px), 720px); background: #060606; }
+   scroll where there is room; a short window keeps 480px and the page scrolls instead of clipping.
+   2026-11-09: the 49px SWHeader above the drawing area was removed, so every bound is 49px lower (drawing area and footer unchanged). */
+.sw-footer-story-workspace { display: flex; flex-direction: column; height: clamp(431px, calc(100dvh - 259px), 671px); background: #060606; }
 .sw-footer-story-canvas--fill { flex: 1 1 auto; min-height: 0; }
 .sw-footer-story-nodes { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 16px; }
 .sw-footer-story-node { margin: 0; padding: 12px; border: 1px solid #dedbd2; border-radius: 6px; background: #fff; }