feat(sw): integrated improvement 0.2.0 (popup content, header open, tool buttons)

SW package 0.2.0 integrated improvement (Task A, steps 1-8). All new props are
optional; existing SW Stories are pixel-identical to the previous build (28/28).

- Build reproducibility: dist text normalized to LF, dist/build-info.json
  (commit, dirty, tool versions, no timestamp), packages/sw/.gitattributes
  (eol=lf). LF checkouts give identical dist and tarball.
- SWHeader: documentOpenPlacement ("menu" default | "header": Open right of
  the logo in the existing document-button look, reusing onDocumentOpen and
  documentOpenLabel, no duplicate Open in the dropdown), leading slot,
  hiddenControls sub-items documentNew / documentOpen / layerFreeze /
  layerLock. Open moves into More on measured overflow (with hysteresis).
- showNew / showOpen (SWHeaderDocumentTitle), showFreeze / showLock (layer
  menu, field, property window list).
- SWToolButton (text / pill / document) and SWToolGroup (radio selection),
  reusing the existing toggle, pill and file-name looks.
- SWPopup / SWPopupSection / SWPopupRow on the shared property window frame;
  SWHeaderPropertyPanel gains children, title, autoFocus and optional
  selection / properties / groups. Escape stack for several popups.
- Field dropdowns inside a popup use the shared fixed overlay
  (useSWFixedDropdownPosition), so the scrolling body no longer clips them.
- AI guide, examples E/F, README, Storybook (SW/Header/Options, SW/Tool,
  SW/Popup) and verification record docs/sw/sw-integrated-improvement-2026-10-19.md.
- Regression scripts rescoped for the intended changes (unused-removal 81/81,
  overview 52/54 with the two pre-existing historical assertions).

Known limitation (unresolved): tools / leading content (incl. SWToolGroup)
does not move into More. With a wide tool bar the configured fields shrink
instead; in Example F the document name and layer field reach 0px at 390px.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/sw/tests/storybook-inventory.mjs

@@ -10,3 +10,13 @@ export const swStoryEntries = index => Object.values(index.entries).filter(entry
 export const retainedInventory = entries => entries.filter(entry => ![...retiredStage1Ids, ...retiredDropdownIds].includes(entry.id))
   .map(entry => entry.id === 'sw-header--composed-controls' ? { ...entry, name: 'Dropdown', title: 'SW/Header' } : entry)
 export const inventorySignature = entries => entries.map(entry => [entry.id, entry.name, entry.tags]).sort((a, b) => a[0].localeCompare(b[0]))
+// 2026-10-19 SW integrated improvement (0.2.0): the only Stories added after the unused-demo removal, under their
+// own titles (SW/Header keeps its 10 Stories), and the only files of the package it changed.
+export const integratedStoryIds = ['sw-header-options--open-placement', 'sw-header-options--hidden-sub-controls', 'sw-header-options--composed-open', 'sw-header-options--composed-responsive', 'sw-tool--tool-buttons', 'sw-popup--custom-content', 'sw-popup--multiple-popups']
+export const integratedChangedFiles = [
+  'packages/sw/README.md', 'packages/sw/package.json', 'packages/sw/build.mjs',
+  'packages/sw/ai/AI_USAGE.md', 'packages/sw/ai/COMPONENT_CATALOG.md', 'packages/sw/ai/COMPOSITION_PATTERNS.md', 'packages/sw/ai/DESIGN_RULES.md',
+  'packages/sw/src/index.ts', 'packages/sw/src/theme/sw.css',
+  'packages/sw/src/components/sw-header/SWHeader.tsx', 'packages/sw/src/components/sw-header/index.ts', 'packages/sw/src/components/sw-header/types.ts',
+  ...['SWHeaderDocumentTitle', 'SWHeaderDropdown', 'SWHeaderFields', 'SWHeaderLayerMenu', 'SWHeaderLineStyleMenu', 'SWHeaderMore', 'SWHeaderPropertyFields', 'SWHeaderPropertyPanel'].map(name => `packages/sw/src/components/sw-header/components/${name}.tsx`),
+]