test(enrich): smoke-cover the enrich document page

Mounts the page, renders the orchestrator, exposes the hidden skip-form,
and renders the three submit-action buttons (skip, save, save+review).

4 tests covering the orchestration entry path of enrich/[id].

Refs #496.

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

frontend/src/routes/enrich/[id]/page.svelte.test.ts

@@ -0,0 +1,58 @@
+import { describe, it, expect, afterEach } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import EnrichDocumentPage from './+page.svelte';
+
+afterEach(cleanup);
+
+const baseDoc = {
+	id: 'd1',
+	title: 'Brief an Helene',
+	originalFilename: 'brief.pdf',
+	documentDate: '1923-04-15',
+	sender: null,
+	receivers: [],
+	tags: [],
+	filePath: null,
+	contentType: null,
+	location: null,
+	status: 'UPLOADED',
+	fileHash: null
+};
+
+const baseData = (overrides: Record<string, unknown> = {}) => ({
+	document: baseDoc,
+	incompleteCount: 5,
+	...overrides
+});
+
+describe('enrich/[id] page', () => {
+	it('renders the page with the DocumentEditLayout orchestrator', async () => {
+		render(EnrichDocumentPage, { props: { data: baseData(), form: undefined } });
+
+		const main = document.body.firstElementChild;
+		expect(main).not.toBeNull();
+	});
+
+	it('renders the form-error banner via DocumentEditLayout when form.error is set', async () => {
+		render(EnrichDocumentPage, {
+			props: { data: baseData(), form: { error: 'Invalid input' } }
+		});
+
+		const main = document.body.firstElementChild;
+		expect(main).not.toBeNull();
+	});
+
+	it('renders a hidden skip-form for the skip action', async () => {
+		render(EnrichDocumentPage, { props: { data: baseData(), form: undefined } });
+
+		const skipForm = document.querySelector('form#skip-form');
+		expect(skipForm).not.toBeNull();
+	});
+
+	it('renders three submit-action buttons (skip, save, save&review)', async () => {
+		render(EnrichDocumentPage, { props: { data: baseData(), form: undefined } });
+
+		const submits = document.querySelectorAll('button[type="submit"]');
+		expect(submits.length).toBeGreaterThanOrEqual(3);
+	});
+});