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.

src/sw/assets/home-menu/bundle.svg

@@ -0,0 +1,26 @@
+<svg preserveAspectRatio="none" overflow="visible" style="display: block;" width="23" height="22" viewBox="0 0 23 22" fill="none" xmlns="http://www.w3.org/2000/svg">
+<g id="inventory_2">
+<g id="Vector" filter="url(#filter0_dd_0_451)">
+<path d="M17.5 4H5.5C4.75 4 4 4.675 4 5.5V7.7575C4 8.2975 4.3225 8.7625 4.75 9.025V16.5C4.75 17.325 5.575 18 6.25 18H16.75C17.425 18 18.25 17.325 18.25 16.5V9.025C18.6775 8.7625 19 8.2975 19 7.7575V5.5C19 4.675 18.25 4 17.5 4ZM16.75 16.5H6.25V9.25H16.75V16.5ZM17.5 7.75H5.5V5.5H17.5V7.75Z" fill="#B6B4AF"/>
+<path d="M13.75 11.5H9.25V13H13.75V11.5Z" fill="#B6B4AF"/>
+</g>
+</g>
+<defs>
+<filter id="filter0_dd_0_451" x="0" y="0" width="23" height="22" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
+<feFlood flood-opacity="0" result="BackgroundImageFix"/>
+<feColorMatrix in="SourceAlpha" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0" result="hardAlpha"/>
+<feOffset/>
+<feGaussianBlur stdDeviation="2"/>
+<feComposite in2="hardAlpha" operator="out"/>
+<feColorMatrix type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0"/>
+<feBlend mode="normal" in2="BackgroundImageFix" result="effect1_dropShadow_0_451"/>
+<feColorMatrix in="SourceAlpha" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0" result="hardAlpha"/>
+<feOffset/>
+<feGaussianBlur stdDeviation="0.5"/>
+<feComposite in2="hardAlpha" operator="out"/>
+<feColorMatrix type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.5 0"/>
+<feBlend mode="normal" in2="effect1_dropShadow_0_451" result="effect2_dropShadow_0_451"/>
+<feBlend mode="normal" in="SourceGraphic" in2="effect2_dropShadow_0_451" result="shape"/>
+</filter>
+</defs>
+</svg>