fix(pagination): add sr-only span to preserve aria-current on mobile AT

When the mobile label is aria-hidden and the desktop button container is
display:none (below sm:), mobile screen reader users had no aria-current
indicator. Added a sr-only span with aria-current="page" that stays in
the AT tree at all breakpoints regardless of CSS display state.

On desktop the active page button also carries aria-current — both
announce the same page information, which is acceptable.

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

frontend/eslint.config.js

@@ -40,6 +40,26 @@ export default defineConfig(
 				parser: ts.parser,
 				svelteConfig
 			}
+		},
+		rules: {
+			// text-accent resolves to #a1dcd8 in light mode (1.52:1 on white — WCAG fail).
+			// layout.css documents it as decorative-only (borders, icon tints, bg fills).
+			// For any text label use text-primary or text-ink instead. This rule catches
+			// the pattern where text-accent appears inside a JavaScript string literal
+			// (e.g. conditional ternary class expressions in Svelte templates).
+			'no-restricted-syntax': [
+				'error',
+				{
+					selector: 'Literal[value=/\\btext-accent\\b/]',
+					message:
+						'text-accent is decorative-only (#a1dcd8 in light mode = 1.52:1 contrast — WCAG fail). Use text-primary or text-ink-2 for text labels.'
+				},
+				{
+					selector: 'TemplateLiteral > TemplateElement[value.raw=/\\btext-accent\\b/]',
+					message:
+						'text-accent is decorative-only (#a1dcd8 in light mode = 1.52:1 contrast — WCAG fail). Use text-primary or text-ink-2 for text labels.'
+				}
+			]
 		}
 	}
 );

frontend/messages/de.json

@@ -23,6 +23,8 @@
 	"nav_conversations": "Briefwechsel",
 	"nav_admin": "Admin",
 	"nav_logout": "Abmelden",
+	"theme_toggle_to_light": "Zu hellem Design wechseln",
+	"theme_toggle_to_dark": "Zu dunklem Design wechseln",
 	"btn_save": "Speichern",
 	"btn_cancel": "Abbrechen",
 	"btn_confirm": "Bestätigen",
@@ -816,6 +818,7 @@
 	"pagination_next": "Weiter",
 	"pagination_page_of": "Seite {page} von {total}",
 	"pagination_nav_label": "Seitennavigation",
+	"pagination_page_button": "Seite {page}",
 
 	"common_opens_new_tab": "(öffnet in neuem Tab)",
 

frontend/messages/en.json

@@ -23,6 +23,8 @@
 	"nav_conversations": "Letters",
 	"nav_admin": "Admin",
 	"nav_logout": "Sign out",
+	"theme_toggle_to_light": "Switch to light mode",
+	"theme_toggle_to_dark": "Switch to dark mode",
 	"btn_save": "Save",
 	"btn_cancel": "Cancel",
 	"btn_confirm": "Confirm",
@@ -816,6 +818,7 @@
 	"pagination_next": "Next",
 	"pagination_page_of": "Page {page} of {total}",
 	"pagination_nav_label": "Pagination",
+	"pagination_page_button": "Page {page}",
 
 	"common_opens_new_tab": "(opens in new tab)",
 

frontend/messages/es.json

@@ -23,6 +23,8 @@
 	"nav_conversations": "Cartas",
 	"nav_admin": "Admin",
 	"nav_logout": "Cerrar sesión",
+	"theme_toggle_to_light": "Cambiar a modo claro",
+	"theme_toggle_to_dark": "Cambiar a modo oscuro",
 	"btn_save": "Guardar",
 	"btn_cancel": "Cancelar",
 	"btn_confirm": "Confirmar",
@@ -816,6 +818,7 @@
 	"pagination_next": "Siguiente",
 	"pagination_page_of": "Página {page} de {total}",
 	"pagination_nav_label": "Paginación",
+	"pagination_page_button": "Página {page}",
 
 	"common_opens_new_tab": "(abre en pestaña nueva)",
 

frontend/src/lib/components/NotificationBell.svelte

@@ -48,6 +48,12 @@ function handleKeydown(event: KeyboardEvent) {
 	}
 }
 
+const bellLabel = $derived(
+	stream.unreadCount > 0
+		? m.notification_bell_unread_label({ count: stream.unreadCount })
+		: m.notification_bell_label()
+);
+
 function attachBellButton(node: HTMLButtonElement) {
 	bellButtonEl = node;
 	return () => {
@@ -72,12 +78,11 @@ onDestroy(() => {
 		{@attach attachBellButton}
 		type="button"
 		onclick={toggleDropdown}
-		aria-label={stream.unreadCount > 0
-			? m.notification_bell_unread_label({ count: stream.unreadCount })
-			: m.notification_bell_label()}
+		aria-label={bellLabel}
+		title={bellLabel}
 		aria-expanded={open}
 		aria-haspopup="true"
-		class="relative rounded-sm p-2 text-white/65 transition-colors hover:bg-white/10 hover:text-white focus:outline-none focus-visible:ring-2 focus-visible:ring-focus-ring"
+		class="relative cursor-pointer rounded-sm p-2 text-white/65 transition-colors hover:bg-white/10 hover:text-white focus:outline-none focus-visible:ring-2 focus-visible:ring-focus-ring"
 	>
 		<svg
 			xmlns="http://www.w3.org/2000/svg"

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

@@ -55,6 +55,34 @@ async function openDropdownAndClickFirstNotification() {
 	notifButton.click();
 }
 
+describe('NotificationBell — cursor and tooltip', () => {
+	it('bell button has cursor-pointer class', async () => {
+		render(NotificationBell);
+		const btn = document.querySelector<HTMLButtonElement>('button[aria-haspopup="true"]')!;
+		expect(btn.classList.contains('cursor-pointer')).toBe(true);
+	});
+
+	it('bell button title equals aria-label when unreadCount is 0', async () => {
+		mockNotificationList.value = [];
+		render(NotificationBell);
+		const btn = document.querySelector<HTMLButtonElement>('button[aria-haspopup="true"]')!;
+		expect(btn.getAttribute('title')).toBe('Benachrichtigungen');
+		expect(btn.getAttribute('aria-label')).toBe(btn.getAttribute('title'));
+	});
+
+	it('bell button title equals aria-label when unreadCount is 3', async () => {
+		mockNotificationList.value = [
+			makeNotification({ id: 'n1' }),
+			makeNotification({ id: 'n2' }),
+			makeNotification({ id: 'n3' })
+		];
+		render(NotificationBell);
+		const btn = document.querySelector<HTMLButtonElement>('button[aria-haspopup="true"]')!;
+		expect(btn.getAttribute('title')).toBe('3 ungelesene Benachrichtigungen');
+		expect(btn.getAttribute('aria-label')).toBe(btn.getAttribute('title'));
+	});
+});
+
 describe('NotificationBell', () => {
 	it('handleMarkRead navigates to URL including annotationId when notification has annotationId', async () => {
 		mockNotificationList.value = [makeNotification({ annotationId: 'annot-1' })];

frontend/src/lib/components/Pagination.svelte

@@ -20,6 +20,48 @@ const controlBase =
 	'inline-flex min-h-[44px] min-w-[44px] items-center justify-center gap-1.5 rounded-sm border border-line bg-white px-4 py-2 font-sans text-sm font-bold text-ink';
 const linkBase = `${controlBase} transition-colors hover:bg-surface focus-visible:ring-2 focus-visible:ring-brand-navy focus-visible:ring-offset-2 focus-visible:outline-none`;
 const disabledBase = `${controlBase} cursor-not-allowed opacity-40`;
+const activePageBase =
+	'inline-flex min-h-[44px] min-w-[44px] items-center justify-center rounded-sm border border-brand-navy bg-brand-navy px-4 py-2 font-sans text-sm font-bold text-white';
+
+/**
+ * Builds the sliding window of 1-indexed page numbers to render as buttons.
+ * Always shows: first, last, current, one neighbor each side.
+ * null entries represent ellipsis gaps.
+ */
+const pageWindow = $derived.by(() => {
+	const first = 1;
+	const last = totalPages;
+	const current = page + 1; // convert to 1-indexed
+
+	const windowStart = Math.max(first, current - 1);
+	const windowEnd = Math.min(last, current + 1);
+
+	const result: (number | null)[] = [];
+
+	result.push(first);
+
+	if (windowStart > first + 2) {
+		result.push(null); // left ellipsis
+	} 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 - 2) {
+		result.push(null); // right ellipsis
+	} else if (windowEnd === last - 2) {
+		result.push(last - 1); // bridge: one page gap, show directly instead of ellipsis
+	}
+
+	if (last > first) {
+		result.push(last);
+	}
+
+	return result;
+});
 </script>
 
 {#if totalPages > 1}
@@ -52,13 +94,60 @@ const disabledBase = `${controlBase} cursor-not-allowed opacity-40`;
 			</span>
 		{/if}
 
+		<!-- Mobile: "Seite X von Y" label (hidden on sm: and above) -->
+		<!-- aria-hidden: decorative visual label; AT uses the sr-only span below for aria-current -->
 		<span
 			data-testid="pagination-page-label"
-			aria-current="page"
-			class="font-sans text-sm text-ink-2"
+			aria-hidden="true"
+			class="font-sans text-sm text-ink-2 sm:hidden"
 		>
 			{m.pagination_page_of({ page: page + 1, total: totalPages })}
 		</span>
+		<!-- Always in the AT tree: announces current page regardless of breakpoint.
+		     On mobile, the desktop button container is display:none so this is the only AT anchor.
+		     On desktop, the active page button also carries aria-current — both announce the same info. -->
+		<span data-testid="pagination-current-page-sr" aria-current="page" class="sr-only">
+			{m.pagination_page_of({ page: page + 1, total: totalPages })}
+		</span>
+
+		<!-- 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 (entry === null ? 'ellipsis-' + i : entry)}
+				{#if entry === null}
+					{#if i === 1}
+						<span
+							data-testid="pagination-ellipsis-left"
+							aria-hidden="true"
+							class="px-2 text-sm text-ink-2">…</span
+						>
+					{:else}
+						<span
+							data-testid="pagination-ellipsis-right"
+							aria-hidden="true"
+							class="px-2 text-sm text-ink-2">…</span
+						>
+					{/if}
+				{:else if entry === page + 1}
+					<span
+						data-testid="pagination-page-{entry}"
+						aria-current="page"
+						aria-label={m.pagination_page_button({ page: entry })}
+						class={activePageBase}
+					>
+						{entry}
+					</span>
+				{:else}
+					<a
+						data-testid="pagination-page-{entry}"
+						aria-label={m.pagination_page_button({ page: entry })}
+						href={makeHref(entry - 1)}
+						class={linkBase}
+					>
+						{entry}
+					</a>
+				{/if}
+			{/each}
+		</div>
 
 		{#if hasNext}
 			<a

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

@@ -19,11 +19,145 @@ 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', () => {
+		it('renders page number buttons when totalPages > 1', async () => {
+			render(Pagination, { page: 4, totalPages: 12, makeHref });
+
+			const nav = page.getByRole('navigation');
+			// active page button — the current page (5, 1-indexed)
+			const activeBtn = nav.getByTestId('pagination-page-5');
+			await expect.element(activeBtn).toBeInTheDocument();
+		});
+
+		it('does not render page number buttons when totalPages <= 1', async () => {
+			render(Pagination, { page: 0, totalPages: 1, makeHref });
+
+			// entire nav is hidden
+			const nav = page.getByRole('navigation');
+			await expect.element(nav).not.toBeInTheDocument();
+		});
+
+		it('marks the active page button with aria-current="page"', async () => {
+			render(Pagination, { page: 4, totalPages: 12, makeHref });
+
+			const nav = page.getByRole('navigation');
+			const activeBtn = nav.getByTestId('pagination-page-5');
+			await expect.element(activeBtn).toHaveAttribute('aria-current', 'page');
+		});
+
+		it('active page button has brand-navy background', async () => {
+			render(Pagination, { page: 4, totalPages: 12, makeHref });
+
+			const nav = page.getByRole('navigation');
+			const activeBtn = nav.getByTestId('pagination-page-5');
+			await expect.element(activeBtn).toHaveClass(/bg-brand-navy/);
+		});
+
+		it('active page button has 44px touch target', async () => {
+			render(Pagination, { page: 4, totalPages: 12, makeHref });
+
+			const nav = page.getByRole('navigation');
+			const activeBtn = nav.getByTestId('pagination-page-5');
+			await expect.element(activeBtn).toHaveClass(/min-h-\[44px\]/);
+			await expect.element(activeBtn).toHaveClass(/min-w-\[44px\]/);
+		});
+
+		it('inactive page buttons link to their target page via makeHref', async () => {
+			const spy = vi.fn(makeHref);
+			render(Pagination, { page: 4, totalPages: 12, makeHref: spy });
+
+			const nav = page.getByRole('navigation');
+			// page button for page 1 (0-indexed: 0) should link to /documents?page=0
+			const firstPageBtn = nav.getByTestId('pagination-page-1');
+			await expect.element(firstPageBtn).toHaveAttribute('href', '/documents?page=0');
+		});
+
+		it('renders first and last page buttons always visible', async () => {
+			render(Pagination, { page: 5, totalPages: 12, makeHref });
+
+			const nav = page.getByRole('navigation');
+			await expect.element(nav.getByTestId('pagination-page-1')).toBeInTheDocument();
+			await expect.element(nav.getByTestId('pagination-page-12')).toBeInTheDocument();
+		});
+
+		it('renders ellipsis span between first page and window when gap exists', async () => {
+			// page 6 (0-indexed: 5) — window is 5,6,7 — gap between 1 and 5
+			render(Pagination, { page: 5, totalPages: 12, makeHref });
+
+			const nav = page.getByRole('navigation');
+			const ellipses = nav.getByTestId('pagination-ellipsis-left');
+			await expect.element(ellipses).toBeInTheDocument();
+		});
+
+		it('renders ellipsis span between window and last page when gap exists', async () => {
+			// page 1 (0-indexed: 0) — window is 1,2 — gap between 2 and 12
+			render(Pagination, { page: 0, totalPages: 12, makeHref });
+
+			const nav = page.getByRole('navigation');
+			const ellipsis = nav.getByTestId('pagination-ellipsis-right');
+			await expect.element(ellipsis).toBeInTheDocument();
+		});
+
+		it('does not render left ellipsis when window is adjacent to first page', async () => {
+			// page 1 (0-indexed: 0) — window starts at 1, adjacent to first page
+			render(Pagination, { page: 0, totalPages: 12, makeHref });
+
+			const nav = page.getByRole('navigation');
+			const leftEllipsis = nav.getByTestId('pagination-ellipsis-left');
+			await expect.element(leftEllipsis).not.toBeInTheDocument();
+		});
+
+		it('does not render right ellipsis when window is adjacent to last page', async () => {
+			// last page (0-indexed: 11) — window ends at 12, adjacent to last page
+			render(Pagination, { page: 11, totalPages: 12, makeHref });
+
+			const nav = page.getByRole('navigation');
+			const rightEllipsis = nav.getByTestId('pagination-ellipsis-right');
+			await expect.element(rightEllipsis).not.toBeInTheDocument();
+		});
+
+		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 });
+
+			const nav = page.getByRole('navigation');
+			const pageButtons = nav.getByTestId('pagination-pages');
+			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('sr-only span always provides aria-current="page" for screen readers at all breakpoints', async () => {
+		render(Pagination, { page: 2, totalPages: 10, makeHref });
+
+		const nav = page.getByRole('navigation');
+		const srLabel = nav.getByTestId('pagination-current-page-sr');
+		await expect.element(srLabel).toBeInTheDocument();
+		await expect.element(srLabel).toHaveAttribute('aria-current', 'page');
 	});
 
 	it('renders prev as a link pointing at page - 1 when not on first page', async () => {

frontend/src/lib/components/PdfControls.svelte

@@ -91,7 +91,7 @@ let {
 			aria-label={showAnnotations ? m.pdf_annotations_hide() : m.pdf_annotations_show()}
 			class="flex items-center gap-1.5 rounded px-2 py-1 font-sans text-xs transition {showAnnotations
 				? 'text-ink-2 hover:bg-surface/10'
-				: 'bg-surface/10 text-accent'}"
+				: 'bg-surface/10 text-primary'}"
 		>
 			<svg
 				class="h-3.5 w-3.5 shrink-0"

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

@@ -0,0 +1,67 @@
+import { vi, describe, it, expect, afterEach } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+
+import PdfControls from './PdfControls.svelte';
+
+afterEach(cleanup);
+
+const defaultProps = {
+	currentPage: 1,
+	totalPages: 3,
+	isLoaded: true,
+	showAnnotations: false,
+	annotationCount: 0,
+	onPrev: vi.fn(),
+	onNext: vi.fn(),
+	onZoomIn: vi.fn(),
+	onZoomOut: vi.fn(),
+	onToggleAnnotations: vi.fn()
+};
+
+describe('PdfControls — annotation toggle visibility', () => {
+	it('renders annotation toggle when annotationCount is greater than zero', async () => {
+		render(PdfControls, { ...defaultProps, annotationCount: 3 });
+		await expect
+			.element(page.getByRole('button', { name: /annotierungen anzeigen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('does not render annotation toggle when annotationCount is zero', async () => {
+		render(PdfControls, { ...defaultProps, annotationCount: 0 });
+		await expect
+			.element(page.getByRole('button', { name: /annotierungen/i }))
+			.not.toBeInTheDocument();
+	});
+});
+
+describe('PdfControls — annotation toggle label', () => {
+	it('shows "Annotierungen anzeigen" label when annotations are hidden', async () => {
+		render(PdfControls, { ...defaultProps, annotationCount: 2, showAnnotations: false });
+		const btn = page.getByRole('button', { name: /annotierungen anzeigen/i });
+		await expect.element(btn).toBeInTheDocument();
+	});
+
+	it('shows "Annotierungen verbergen" label when annotations are visible', async () => {
+		render(PdfControls, { ...defaultProps, annotationCount: 2, showAnnotations: true });
+		const btn = page.getByRole('button', { name: /annotierungen verbergen/i });
+		await expect.element(btn).toBeInTheDocument();
+	});
+});
+
+describe('PdfControls — annotation toggle contrast (WCAG 2.1 AA)', () => {
+	it('uses text-primary class on annotation toggle button when annotations are hidden', async () => {
+		const { container } = render(PdfControls, {
+			...defaultProps,
+			annotationCount: 2,
+			showAnnotations: false
+		});
+		const allButtons = container.querySelectorAll('button');
+		const annotationBtn = Array.from(allButtons).find((b) =>
+			b.getAttribute('aria-label')?.toLowerCase().includes('annotierungen')
+		);
+		expect(annotationBtn).not.toBeNull();
+		expect(annotationBtn!.className).toContain('text-primary');
+		expect(annotationBtn!.className).not.toContain('text-accent');
+	});
+});

frontend/src/lib/components/ProgressRing.svelte

@@ -19,7 +19,7 @@ let { percentage }: { percentage: number } = $props();
 		/>
 	</svg>
 	<span
-		class="block text-center font-sans text-xs font-bold {percentage > 0 ? 'text-accent' : 'text-gray-400'}"
+		class="block text-center font-sans text-xs font-bold {percentage > 0 ? 'text-primary' : 'text-gray-400'}"
 	>
 		{percentage}%
 	</span>

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

@@ -25,12 +25,12 @@ describe('ProgressRing', () => {
 		expect(el.className).toContain('text-gray-400');
 	});
 
-	it('renders a mint-colored label when percentage is > 0', async () => {
+	it('renders a primary-colored label when percentage is > 0', async () => {
 		render(ProgressRing, { percentage: 75 });
 		const label = page.getByText('75%');
 		await expect.element(label).toBeInTheDocument();
 		const el = (await label.element()) as HTMLElement;
-		expect(el.className).toContain('text-accent');
+		expect(el.className).toContain('text-primary');
 	});
 
 	it('renders a fully filled arc for 100%', async () => {

frontend/src/lib/components/ThemeToggle.svelte

@@ -1,5 +1,6 @@
 <script lang="ts">
 import { onMount } from 'svelte';
+import { m } from '$lib/paraglide/messages.js';
 
 type Theme = 'light' | 'dark';
 
@@ -19,6 +20,10 @@ onMount(() => {
 	theme = resolveInitialTheme();
 });
 
+const themeLabel = $derived(
+	theme === 'dark' ? m.theme_toggle_to_light() : m.theme_toggle_to_dark()
+);
+
 function toggle() {
 	theme = theme === 'dark' ? 'light' : 'dark';
 	localStorage.setItem('theme', theme);
@@ -29,8 +34,8 @@ function toggle() {
 <button
 	type="button"
 	onclick={toggle}
-	aria-label={theme === 'dark' ? 'light mode' : 'dark mode'}
-	title={theme === 'dark' ? 'light mode' : 'dark mode'}
+	aria-label={themeLabel}
+	title={themeLabel}
 	class="rounded p-1.5 text-white/65 transition-colors hover:bg-white/10 hover:text-white focus:outline-none focus-visible:ring-2 focus-visible:ring-focus-ring"
 >
 	{#if theme === 'dark'}

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

@@ -0,0 +1,45 @@
+import { afterEach, beforeEach, describe, expect, it } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import ThemeToggle from './ThemeToggle.svelte';
+
+afterEach(() => {
+	cleanup();
+	localStorage.removeItem('theme');
+});
+
+describe('ThemeToggle — label derivation (light mode)', () => {
+	beforeEach(() => {
+		localStorage.setItem('theme', 'light');
+	});
+
+	it('aria-label invites switching to dark mode when theme is light', async () => {
+		render(ThemeToggle);
+		const btn = await page.getByRole('button').element();
+		expect(btn.getAttribute('aria-label')).toBe('Zu dunklem Design wechseln');
+	});
+
+	it('title equals aria-label in light mode', async () => {
+		render(ThemeToggle);
+		const btn = await page.getByRole('button').element();
+		expect(btn.getAttribute('title')).toBe(btn.getAttribute('aria-label'));
+	});
+});
+
+describe('ThemeToggle — label derivation (dark mode)', () => {
+	beforeEach(() => {
+		localStorage.setItem('theme', 'dark');
+	});
+
+	it('aria-label invites switching to light mode when theme is dark', async () => {
+		render(ThemeToggle);
+		const btn = await page.getByRole('button').element();
+		expect(btn.getAttribute('aria-label')).toBe('Zu hellem Design wechseln');
+	});
+
+	it('title equals aria-label in dark mode', async () => {
+		render(ThemeToggle);
+		const btn = await page.getByRole('button').element();
+		expect(btn.getAttribute('title')).toBe(btn.getAttribute('aria-label'));
+	});
+});

frontend/src/routes/layout.css

@@ -365,6 +365,11 @@
 		text-underline-offset: 4px;
 	}
 
+	/* Tailwind preflight resets cursor on *, overriding the browser default for buttons */
+	button {
+		cursor: pointer;
+	}
+
 	/* Fallback focus ring for any interactive element not styled with ring-focus-ring */
 	:focus-visible {
 		outline: 2px solid var(--c-focus-ring);