test(dashboard): cover ReaderPersonChips branches

Section landmark with aria-label, empty placeholder, per-person chip
with link to detail, document-count chip visibility branch, displayName
vs lastName fallback, all-persons footer link.

7 tests, ~16 branches.

Refs #496.

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

frontend/src/lib/shared/dashboard/ReaderPersonChips.svelte.test.ts

@@ -0,0 +1,80 @@
+import { describe, it, expect, afterEach } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import ReaderPersonChips from './ReaderPersonChips.svelte';
+
+afterEach(cleanup);
+
+const makePerson = (overrides: Record<string, unknown> = {}) => ({
+	id: 'p1',
+	displayName: 'Anna Schmidt',
+	lastName: 'Schmidt',
+	documentCount: 5,
+	...overrides
+});
+
+describe('ReaderPersonChips', () => {
+	it('renders the section with the persons heading via aria-label', async () => {
+		render(ReaderPersonChips, { props: { persons: [] } });
+
+		await expect.element(page.getByRole('region', { name: /personen/i })).toBeVisible();
+	});
+
+	it('renders the no-persons placeholder when persons is empty', async () => {
+		render(ReaderPersonChips, { props: { persons: [] } });
+
+		await expect.element(page.getByText('Noch keine Personen im Archiv.')).toBeVisible();
+	});
+
+	it('renders one chip per person with link to person detail', async () => {
+		render(ReaderPersonChips, {
+			props: {
+				persons: [
+					makePerson({ id: 'p1', displayName: 'Anna Schmidt' }),
+					makePerson({ id: 'p2', displayName: 'Bert Meier' })
+				]
+			}
+		});
+
+		await expect
+			.element(page.getByRole('link', { name: /anna schmidt/i }))
+			.toHaveAttribute('href', '/persons/p1');
+		await expect
+			.element(page.getByRole('link', { name: /bert meier/i }))
+			.toHaveAttribute('href', '/persons/p2');
+	});
+
+	it('renders document count chip when documentCount > 0', async () => {
+		render(ReaderPersonChips, {
+			props: { persons: [makePerson({ documentCount: 7 })] }
+		});
+
+		await expect.element(page.getByText('7')).toBeVisible();
+	});
+
+	it('omits document count chip when documentCount is 0', async () => {
+		render(ReaderPersonChips, {
+			props: { persons: [makePerson({ documentCount: 0 })] }
+		});
+
+		await expect.element(page.getByText('0')).not.toBeInTheDocument();
+	});
+
+	it('falls back to lastName when displayName is missing', async () => {
+		render(ReaderPersonChips, {
+			props: {
+				persons: [makePerson({ displayName: null, lastName: 'Schmidt' })]
+			}
+		});
+
+		await expect.element(page.getByRole('link', { name: /schmidt/i })).toBeVisible();
+	});
+
+	it('renders the all-persons footer link', async () => {
+		render(ReaderPersonChips, { props: { persons: [makePerson()] } });
+
+		await expect
+			.element(page.getByRole('link', { name: /alle personen/i }))
+			.toHaveAttribute('href', '/persons');
+	});
+});