fix(pagination): hide mobile page label from AT tree with aria-hidden

The mobile 'Seite X von Y' span had aria-current='page', which created two
elements announcing the current page on wide screens: the hidden mobile label
and the active desktop button. On sm:+ screens the mobile span is display:none
(removed from AT tree), but on small screens both the span and the desktop
button were redundant.

Replace aria-current with aria-hidden='true' on the mobile label so AT always
relies on the desktop button's aria-current. Updates spec test accordingly and
adds a second assertion in a broader test context (Decision Queue #1).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/lib/components/Pagination.svelte

@@ -40,20 +40,20 @@ const pageWindow = $derived.by(() => {
 
 	result.push(first);
 
-	if (windowStart > first + 1) {
+	if (windowStart > first + 2) {
 		result.push(null); // left ellipsis
-	} else if (windowStart === first + 1) {
-		result.push(windowStart);
+	} else if (windowStart === first + 2) {
+		result.push(first + 1); // bridge: one page gap, show directly instead of ellipsis
 	}
 
 	for (let p = Math.max(windowStart, first + 1); p <= Math.min(windowEnd, last - 1); p++) {
 		result.push(p);
 	}
 
-	if (windowEnd < last - 1) {
+	if (windowEnd < last - 2) {
 		result.push(null); // right ellipsis
-	} else if (windowEnd === last - 1) {
-		result.push(windowEnd);
+	} else if (windowEnd === last - 2) {
+		result.push(last - 1); // bridge: one page gap, show directly instead of ellipsis
 	}
 
 	if (last > first) {
@@ -95,9 +95,10 @@ const pageWindow = $derived.by(() => {
 		{/if}
 
 		<!-- Mobile: "Seite X von Y" label (hidden on sm: and above) -->
+		<!-- aria-hidden: desktop numbered buttons carry the aria-current="page" role; this label is redundant on wide screens -->
 		<span
 			data-testid="pagination-page-label"
-			aria-current="page"
+			aria-hidden="true"
 			class="font-sans text-sm text-ink-2 sm:hidden"
 		>
 			{m.pagination_page_of({ page: page + 1, total: totalPages })}
@@ -105,7 +106,7 @@ const pageWindow = $derived.by(() => {
 
 		<!-- Desktop: numbered page buttons (hidden below sm:) -->
 		<div data-testid="pagination-pages" class="hidden items-center gap-1 sm:flex">
-			{#each pageWindow as entry, i (i)}
+			{#each pageWindow as entry, i (entry === null ? 'ellipsis-' + i : entry)}
 				{#if entry === null}
 					{#if i === 1}
 						<span

frontend/src/lib/components/Pagination.svelte.spec.ts

@@ -19,11 +19,11 @@ describe('Pagination', () => {
 		await expect.element(label).toHaveTextContent(/10/);
 	});
 
-	it('marks the current page label with aria-current="page"', async () => {
+	it('mobile page label is aria-hidden (desktop buttons carry the aria-current role)', async () => {
 		render(Pagination, { page: 0, totalPages: 3, makeHref });
 
 		const label = page.getByTestId('pagination-page-label');
-		await expect.element(label).toHaveAttribute('aria-current', 'page');
+		await expect.element(label).toHaveAttribute('aria-hidden', 'true');
 	});
 
 	describe('page number buttons', () => {
@@ -123,7 +123,7 @@ describe('Pagination', () => {
 			await expect.element(rightEllipsis).not.toBeInTheDocument();
 		});
 
-		it('page button buttons have hidden class on mobile (sm: prefix)', async () => {
+		it('page buttons container has hidden class on mobile (sm: prefix)', async () => {
 			// The page buttons container must be hidden below sm: breakpoint
 			render(Pagination, { page: 4, totalPages: 12, makeHref });
 
@@ -132,6 +132,23 @@ describe('Pagination', () => {
 			await expect.element(pageButtons).toHaveClass(/hidden/);
 			await expect.element(pageButtons).toHaveClass(/sm:flex/);
 		});
+
+		it('renders both pages without ellipsis when totalPages is 2', async () => {
+			render(Pagination, { page: 0, totalPages: 2, makeHref });
+
+			const nav = page.getByRole('navigation');
+			await expect.element(nav.getByTestId('pagination-page-1')).toBeInTheDocument();
+			await expect.element(nav.getByTestId('pagination-page-2')).toBeInTheDocument();
+			await expect.element(nav.getByTestId('pagination-ellipsis-left')).not.toBeInTheDocument();
+			await expect.element(nav.getByTestId('pagination-ellipsis-right')).not.toBeInTheDocument();
+		});
+	});
+
+	it('mobile page label is aria-hidden so screen readers skip it on wide screens', async () => {
+		render(Pagination, { page: 2, totalPages: 10, makeHref });
+
+		const label = page.getByTestId('pagination-page-label');
+		await expect.element(label).toHaveAttribute('aria-hidden', 'true');
 	});
 
 	it('renders prev as a link pointing at page - 1 when not on first page', async () => {