feat(sw): integrate home menu into SWHeader (Task A + B)

Combine Task A (e8409ef, SW 0.2.0 integrated improvement) with Task B
(396539d, Figma-based SWHomeMenu / SWHomeMenuSection / SWHomeMenuItem /
SWRecentFiles). Task B's 84 new files are taken unchanged except for the
public-import Storybook update and joining the popup Escape stack.

- Export the home menu from @hm-design/sw
- SWHeader homeMenu / homeMenuOpen / defaultHomeMenuOpen /
  onHomeMenuOpenChange: hidden by default, the logo toggles it (onHomeClick
  is not called while homeMenu is set), placed from the measured header,
  closes with / closes the document and field dropdowns
- Logo aria-expanded / aria-controls; menu layer CSS (z-index 20)
- AI catalog / patterns / design rules, example G, README, usage guide
- Storybook SW/Home Menu uses @hm-design/sw; integration story

Verified: SW typecheck, tsc -b, SW build, Storybook build, AI docs 22/22,
28/28 existing SW shots pixel-identical, regression 96 PASS / 0 FAIL,
home menu checks 22/22. Not run: tarball consumer install.

packages/sw/src/theme/sw.css

@@ -1876,3 +1876,8 @@ div.hm-sw-header__menu-row { justify-content: space-between; gap: 8px; padding-l
 .hm-sw-header[data-leading="open"] .hm-sw-header__fields[data-configured] > .hm-sw-header__control:not([data-control="document"]) > * { flex-shrink: 0; }
 /* ...and the file name gives way only down to the default design's smallest width (96px, see the clamps above). */
 .hm-sw-header[data-leading="open"] .hm-sw-header__fields[data-configured] > .hm-sw-header__control[data-control="document"] { min-width: 96px; }
+
+/* Logo (home) menu layer (SWHeader homeMenu, 2026-10-19). Top of the header, left / max-width measured from the
+   object area (−2px) to the window area. Above the property bar anchor (2), under the dropdowns (30) and the
+   property window (40). The logo, the file name and the window area stay visible beside it. */
+.hm-sw-header__home-menu { position: absolute; top: 0; z-index: 20; }