feat(search): show result count and term-aware empty state in DocumentList

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

frontend/src/routes/DocumentList.svelte.spec.ts

@@ -0,0 +1,51 @@
+import { describe, expect, it, vi } from 'vitest';
+import { render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import DocumentList from './DocumentList.svelte';
+
+vi.mock('$app/navigation', () => ({ goto: vi.fn() }));
+
+const baseProps = {
+	documents: [],
+	canWrite: false,
+	error: null,
+	total: 0,
+	q: ''
+};
+
+const makeDoc = () => ({
+	id: '1',
+	title: 'Testbrief',
+	originalFilename: 'testbrief.pdf',
+	status: 'UPLOADED' as const,
+	documentDate: '2024-03-15',
+	location: null,
+	sender: null,
+	receivers: [],
+	tags: []
+});
+
+describe('DocumentList – result count', () => {
+	it('shows result count when total > 0', async () => {
+		render(DocumentList, { ...baseProps, documents: [makeDoc()], total: 1, q: 'test' });
+		await expect.element(page.getByText('1 Dokumente')).toBeInTheDocument();
+	});
+
+	it('does not show result count when total is 0 and there is no error', async () => {
+		render(DocumentList, { ...baseProps, total: 0, q: '' });
+		const count = page.getByText(/\d+ Dokumente/);
+		await expect.element(count).not.toBeInTheDocument();
+	});
+});
+
+describe('DocumentList – empty state with search term', () => {
+	it('shows generic empty heading when q is empty', async () => {
+		render(DocumentList, { ...baseProps });
+		await expect.element(page.getByText(/Keine Dokumente/)).toBeInTheDocument();
+	});
+
+	it('shows search term in empty state when q is set', async () => {
+		render(DocumentList, { ...baseProps, q: 'Urlaub' });
+		await expect.element(page.getByText(/"Urlaub"/)).toBeInTheDocument();
+	});
+});