refactor(storybook): fold SW Header Options stories into SW/Header

Remove the separate SW/Header/Options sidebar item. Its examples move to two
Stories directly under SW/Header (src/sw/sw-header-open.stories.tsx):
- Document Open: Open placement, label, 10-width responsive, composed bar,
  composed (controls) responsive
- Hidden Sub Controls: document New / Open and layer freeze / lock removal

No public API or component change. Tests and inventory follow the new IDs
(integrated 97/97, existing Stories pixel-identical 28/28, unused-removal
83/83). The two remaining overview failures are pre-existing historical
assertions (also failing on 5faa1f1), not new defects.

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

packages/sw/tests/storybook-unused-removal.browser.mjs

@@ -26,12 +26,13 @@ const beforeSW = swStoryEntries(beforeIndex), afterSW = swStoryEntries(afterInde
 const expected = beforeSW.filter(e => !retiredUnusedDemoIds.includes(e.id))
 report.data.inventory = { before: [stories(beforeIndex).length, beforeSW.length], after: [stories(afterIndex).length, afterSW.length], sw: afterSW.map(e => [e.id, e.name]) }
 await writeFile(path.join(out, 'story-inventory-after.json'), JSON.stringify({ total: stories(afterIndex).length, sw: afterSW.map(e => ({ id: e.id, name: e.name, title: e.title, tags: e.tags })) }, null, 2) + '\n')
-// 2026-10-19 integrated improvement: 329 + its 7 Stories under SW/Header/Options, SW/Tool and SW/Popup (SW/Header stays 10).
+// 2026-10-19 integrated improvement: 329 + its 5 Stories (2 under SW/Header, SW/Tool, SW/Popup); the 10 retained SW/Header Stories stay.
 const added = stories(afterIndex).filter(e => !beforeIndex.entries[e.id])
-check('inventory: 19 -> 10 SW/Header Stories, 338 -> 329 total plus only the 7 integrated-improvement Stories', beforeSW.length === 19 && afterSW.length === 10 && stories(beforeIndex).length === 338 && stories(afterIndex).length === 329 + integratedStoryIds.length && JSON.stringify(added.map(e => e.id).sort()) === JSON.stringify([...integratedStoryIds].sort()), { ...report.data.inventory, added: added.map(e => e.id) })
+const retainedSW = afterSW.filter(e => !integratedStoryIds.includes(e.id))
+check('inventory: 19 -> 10 retained SW/Header Stories, 338 -> 329 total plus only the integrated-improvement Stories', beforeSW.length === 19 && retainedSW.length === 10 && stories(beforeIndex).length === 338 && stories(afterIndex).length === 329 + integratedStoryIds.length && JSON.stringify(added.map(e => e.id).sort()) === JSON.stringify([...integratedStoryIds].sort()), { ...report.data.inventory, added: added.map(e => e.id) })
 check('inventory: the nine requested IDs existed before and are absent now', retiredUnusedDemoIds.length === 9 && retiredUnusedDemoIds.every(id => beforeIndex.entries[id] && !afterIndex.entries[id]))
-check('inventory: retained SW IDs, names, titles, tags and order unchanged', sig(expected) === sig(afterSW), afterSW.map(e => e.id))
-const others = index => Object.values(index.entries).filter(e => !retiredUnusedDemoIds.includes(e.id) && !integratedStoryIds.includes(e.id) && !/^sw-(header-options|tool|popup)--docs$/.test(e.id))
+check('inventory: retained SW IDs, names, titles, tags and order unchanged', sig(expected) === sig(retainedSW), retainedSW.map(e => e.id))
+const others = index => Object.values(index.entries).filter(e => !retiredUnusedDemoIds.includes(e.id) && !integratedStoryIds.includes(e.id) && !/^sw-(tool|popup)--docs$/.test(e.id))
 check('inventory: every non-removed index entry identical (docs and other packages included)', JSON.stringify(others(beforeIndex)) === JSON.stringify(others(afterIndex)))
 check('inventory: Dropdown keeps sw-header--composed-controls / Dropdown / SW/Header', afterIndex.entries['sw-header--composed-controls']?.name === 'Dropdown' && afterIndex.entries['sw-header--composed-controls']?.title === 'SW/Header')
 check('inventory: comparison keeps its ID and name', afterIndex.entries['sw-header--property-panel-compare']?.name === 'Property Panel · 4개 비교')