test(documents): smoke-cover the new document page

Renders BulkDocumentEditLayout with prop pass-through and an
empty-values branch.

Refs #496.

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

frontend/src/routes/documents/new/page.svelte.test.ts

@@ -0,0 +1,33 @@
+import { describe, it, expect, afterEach } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import DocumentNewPage from './+page.svelte';
+
+afterEach(cleanup);
+
+describe('documents/new page', () => {
+	it('renders the BulkDocumentEditLayout with prop pass-through', async () => {
+		render(DocumentNewPage, {
+			props: {
+				data: {
+					initialSenderId: 'p1',
+					initialSenderName: 'Anna Schmidt',
+					initialReceivers: []
+				}
+			}
+		});
+
+		const main = document.body.firstElementChild;
+		expect(main).not.toBeNull();
+	});
+
+	it('renders without crashing when initial values are empty', async () => {
+		render(DocumentNewPage, {
+			props: {
+				data: { initialSenderId: '', initialSenderName: '', initialReceivers: [] }
+			}
+		});
+
+		const main = document.body.firstElementChild;
+		expect(main).not.toBeNull();
+	});
+});