アイヌ語追加 (#428) (#433)

Reviewed-on: #433
Co-authored-by: miteruzo <miteruzo@naver.com>

frontend/src/pages/help/HelpDetailPage.test.tsx

@@ -17,19 +17,19 @@ const Navigation = () => {
   return (
       <>
 	<output data-testid="location">{location.pathname}{location.search}</output>
-	<button onClick={() => navigate ('/help/設定%20手順')}>switch article</button>
-	<button onClick={() => navigate ('/help/guide?edition=2026-10-02.3')}>
+	<button onClick={() => navigate ('/ja/help/設定%20手順')}>switch article</button>
+	<button onClick={() => navigate ('/ja/help/guide?edition=2026-10-02.3')}>
 	  switch edition
 	</button>
       </>)
 }
 
 
-const renderDetail = (route = '/help/guide') => renderWithProviders (
+const renderDetail = (route = '/ja/help/guide') => renderWithProviders (
     <>
       <Navigation/>
       <Routes>
-	<Route path="/help/:identifier" element={<HelpDetailPage/>}/>
+	<Route path="/ja/help/:identifier" element={<HelpDetailPage/>}/>
       </Routes>
     </>, { route })
 
@@ -39,7 +39,7 @@ describe ('Help details', () => {
 
   it.each (['2026-10-02', '2026-10-02.2', '2026-10-02.3', '2026-10-02.10']) (
       'displays a date without inventing a time for edition %s', async edition => {
-	const { container } = renderDetail (`/help/guide?edition=${ edition }`)
+	const { container } = renderDetail (`/ja/help/guide?edition=${ edition }`)
 	await screen.findByRole ('heading')
 	expect (container).toHaveTextContent ('10月2日')
 	expect (container).not.toHaveTextContent ('Invalid Date')
@@ -61,31 +61,31 @@ describe ('Help details', () => {
   })
 
   it ('uses the historical H1 in both page and document titles', async () => {
-    renderDetail ('/help/guide?edition=2026-10-01')
+    renderDetail ('/ja/help/guide?edition=2026-10-01')
     expect (await screen.findByRole ('heading', { name: '旧ホーム' })).toBeInTheDocument ()
     expect (screen.getByText ('過去限定本文')).toBeInTheDocument ()
     await waitFor (() => expect (document.title).toContain ('旧ホーム ヘルプ'))
     expect (screen.getByText ('(最古)')).toBeInTheDocument ()
     expect (screen.getByRole ('link', { name: '新 >' }))
-	.toHaveAttribute ('href', '/help/guide?edition=2026-10-02')
+	.toHaveAttribute ('href', '/ja/help/guide?edition=2026-10-02')
   })
 
   it ('navigates .2, .3 and .10 in numeric edition order', async () => {
-    renderDetail ('/help/guide?edition=2026-10-02.3')
+    renderDetail ('/ja/help/guide?edition=2026-10-02.3')
     await screen.findByRole ('heading', { name: 'ホーム第三版' })
     expect (screen.getByRole ('link', { name: '< 古' }))
-	.toHaveAttribute ('href', '/help/guide?edition=2026-10-02.2')
+	.toHaveAttribute ('href', '/ja/help/guide?edition=2026-10-02.2')
     const next = screen.getByRole ('link', { name: '新 >' })
-    expect (next).toHaveAttribute ('href', '/help/guide?edition=2026-10-02.10')
+    expect (next).toHaveAttribute ('href', '/ja/help/guide?edition=2026-10-02.10')
     fireEvent.click (next)
     await screen.findByRole ('heading', { name: 'ホーム第十版' })
     expect (screen.getByText ('(最新)')).toBeInTheDocument ()
     expect (screen.queryByText ('第三版本文')).not.toBeInTheDocument ()
   })
 
-  it.each (['/help/missing', '/help/guide?edition=missing',
-      '/help/guide?edition=2026-02-30', '/help/guide?edition=2026-10-02.2.extra',
-      '/help/guide?edition=2026-10-02.11']) (
+  it.each (['/ja/help/missing', '/ja/help/guide?edition=missing',
+      '/ja/help/guide?edition=2026-02-30', '/ja/help/guide?edition=2026-10-02.2.extra',
+      '/ja/help/guide?edition=2026-10-02.11']) (
       'shows NotFound without redirecting %s', async route => {
 	renderDetail (route)
 	expect (await screen.findByText ('404')).toBeInTheDocument ()