fix(review): GeschichtenCard uses GeschichteSummary type; focus-visible on journey links; fix stale tests

- GeschichtenCard.svelte: use GeschichteSummary instead of Geschichte
  (list endpoint returns summaries; no items/createdAt/updatedAt needed)
- GeschichtenCard.svelte.test.ts: factory returns GeschichteSummary with
  lean author shape; drop Geschichte-only fields (createdAt, groups, etc.)
- geschichten/[id]/+page.svelte: add focus:outline-none focus-visible:ring-2
  focus-visible:ring-focus-ring to journey item document links (WCAG 2.4.7)
- page.svelte.test.ts ([id]): replace stale documents[] factory field with
  items[]; test now checks placeholder text + note caption
- page.svelte.test.ts (new): remove removed initialDocuments from baseData;
  rename test to reflect that only initialPersons is passed through

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

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

@@ -21,8 +21,7 @@ const { default: GeschichtenNewPage } = await import('./+page.svelte');
 afterEach(cleanup);
 
 const baseData = {
-	initialPersons: [] as { id: string; displayName: string }[],
-	initialDocuments: [] as { id: string; title: string }[]
+	initialPersons: [] as { id: string; displayName: string }[]
 };
 
 describe('geschichten/new page', () => {
@@ -53,18 +52,15 @@ describe('geschichten/new page', () => {
 		expect(inputs.length).toBeGreaterThan(0);
 	});
 
-	it('passes initialPersons and initialDocuments through to the editor', async () => {
+	it('passes initialPersons through to the editor', async () => {
 		render(GeschichtenNewPage, {
 			props: {
 				data: {
-					initialPersons: [{ id: 'p1', displayName: 'Anna Schmidt' }],
-					initialDocuments: [{ id: 'd1', title: 'Brief 1923' }]
+					initialPersons: [{ id: 'p1', displayName: 'Anna Schmidt' }]
 				}
 			}
 		});
 
-		// Both should appear somewhere in the rendered editor
 		await expect.element(page.getByText('Anna Schmidt')).toBeVisible();
-		await expect.element(page.getByText('Brief 1923')).toBeVisible();
 	});
 });