docs(storybook): tidy SW Storybook gauges, responsive rows and page titles

- SWPopup Custom Content and the SW Viewer options panel use SWSlider style B
  (appearance="property") only; the A/B comparison, the style select and the
  green panel gauge are gone (SWViewerSlider itself is unchanged).
- SW Header / Viewer / Footer Responsive More: the 1920px row shows only when the
  content Inner is 1920px or wider (container query); Footer rows fit the page
  width without scrollers so ▲ More handles narrow widths.
- Logo pages fit without scrollers; SW Header Logo Slot is "Logo" in the sidebar
  with the title "SW Header — 로고" (ID sw-header--logo-slot kept).
- Property Panel (was "Property Panel · 4개 비교"): no Inner scroller, the page
  scrolls, 2 × 2 grid with one column below 720px.
- SW Footer drops the "실제 Footer 조합 (동작)" heading; SW Viewer Header page is
  titled "SW Viewer Header" with 기본형 and 최소화 · 닫기 버튼 only.
- Browser tests, inventory and README follow these changes; visual baselines are
  not updated.

src/sw/sw-footer-stories.css

@@ -29,6 +29,8 @@
 .sw-footer-story-row--tight { gap: 0; }
 .sw-footer-story-inline { display: inline-flex; flex-direction: column; padding: 0; }
 .sw-footer-story-width + .sw-footer-story-width { margin-top: 16px; }
+/* The hidden 1920px row (Responsive More, narrower than 1920px) takes its gap with it. */
+@container (max-width: 1919.98px) { .sw-story-responsive-wide + .sw-footer-story-width { margin-top: 0; } }
 .sw-footer-story-aux-compare { display: grid; grid-template-columns: repeat(auto-fill, minmax(560px, 1fr)); gap: 16px; }
 .sw-footer-story-aux-row { display: flex; align-items: center; gap: 12px; margin: 0; }
 .sw-footer-story-aux-row figcaption { flex: 0 0 120px; font-size: 12px; color: #3d4a45; }