feat(sw): remove no-logo case from SW Header Logo story

Viewer Logo story keeps its no-logo case. Viewer test expects 2 SW headers.

packages/sw/tests/viewer.browser.mjs

@@ -449,7 +449,7 @@ if (comparison.reference) {
   }
   check('header height and menu row unchanged with / without logo', [none, src, node].every(item => item.height === 52 && item.fileOpenY === none.fileOpenY), [none, src, node].map(item => item.height + '/' + item.fileOpenY).join(' '))
   {
-    // SWHeader keeps its 80px home area and slant without a logo (unlike the viewer).
+    // SWHeader keeps its 80px home area and slant with a logo (2026-10-26: its Logo story has no "로고 없음" case).
     const sw = await newPage(1920, 1000)
     await sw.goto(`${storybook}/iframe.html?id=sw-header--logo-slot&viewMode=story`)
     await sw.waitForSelector('[data-logo-case] .hm-sw-header:visible')
@@ -457,7 +457,7 @@ if (comparison.reference) {
       const home = header.querySelector('.hm-sw-header__home')
       return { width: home ? Math.round(home.getBoundingClientRect().width) : 0, slant: !!home?.querySelector('.hm-sw-header__home-bg') }
     }))
-    check('SWHeader: 80px home area and slant with and without a logo', homes.length === 3 && homes.every(home => home.width === 80 && home.slant), JSON.stringify(homes))
+    check('SWHeader: 80px home area and slant with a logo', homes.length === 2 && homes.every(home => home.width === 80 && home.slant), JSON.stringify(homes))
     await sw.close()
   }
   for (const [index, name] of [[0, 'none'], [1, 'src'], [2, 'element']]) {

src/sw/sw-header.stories.tsx

@@ -441,10 +441,10 @@ export function ComposedDemo() {
 }
 
 // 2026-10-22 (user request): sidebar "Logo" (ID sw-header--logo-slot kept), page title "SW Header — 로고". Same cases,
-// order and layout as SW/Viewer › Logo: 로고 없음 → logoSrc → logo (element), each header fluid up to 1440px (no
+// order and layout as SW/Viewer › Logo: logoSrc → logo (element), each header fluid up to 1440px (no
 // scroller). The SW Header home click (callbacks.onHomeClick) is kept.
+// 2026-10-26 (user request): the "로고 없음" case is removed here only; SW/Viewer › Logo keeps it.
 const LOGO_CASES: { title: string; props: Partial<SWHeaderProps> }[] = [
-  { title: "로고 없음 (기본)", props: { logoSrc: undefined, logoAlt: undefined } },
   { title: "logoSrc (이미지 URL)", props: { logoSrc: placeholderLogo, logoAlt: "임시 로고" } },
   { title: "logo (요소)", props: { logo: <svg viewBox="0 0 32 17" width="32" height="17" aria-hidden="true"><rect x="0.5" y="0.5" width="31" height="16" rx="3" fill="none" stroke="#fff" /><text x="16" y="12.5" fill="#fff" fontSize="10" fontWeight="700" textAnchor="middle">LOGO</text></svg>, logoAlt: "예시 로고" } },
 ]