feat(frontend): update generated API types and Geschichte routes for JourneyItem model

- api.ts: add GeschichteType, JourneyItem, GeschichteSummary schemas;
  remove documentId param from list endpoint; change list response to
  GeschichteSummary[]; add type + items to Geschichte; remove documents field
- GeschichteEditor: remove DocumentMultiSelect + documentIds from payload
  (journey items are managed via the future Lesereisen editor, not here)
- GET /geschichten page: remove documentId filter from server load + URL logic
- geschichten/new: remove documentId pre-population from server load
- geschichten/[id]: replace g.documents with g.items (document-backed JourneyItems)
- geschichten/new + [id]/edit: remove documentIds from submit payload type

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

frontend/src/routes/geschichten/+page.server.ts

@@ -9,15 +9,13 @@ type Person = components['schemas']['Person'];
 export const load: PageServerLoad = async ({ url, fetch }) => {
 	const api = createApiClient(fetch);
 	const personIds = url.searchParams.getAll('personId');
-	const documentId = url.searchParams.get('documentId') ?? undefined;
 
 	const [listResult, ...personResults] = await Promise.all([
 		api.GET('/api/geschichten', {
 			params: {
 				query: {
 					status: 'PUBLISHED',
-					personId: personIds.length ? personIds : undefined,
-					documentId
+					personId: personIds.length ? personIds : undefined
 				}
 			}
 		}),
@@ -34,7 +32,6 @@ export const load: PageServerLoad = async ({ url, fetch }) => {
 
 	return {
 		geschichten: listResult.data ?? [],
-		personFilters,
-		documentFilter: documentId ?? null
+		personFilters
 	};
 };

frontend/src/routes/geschichten/+page.svelte

@@ -11,12 +11,11 @@ let { data }: { data: PageData } = $props();
 let showPersonPicker = $state(false);
 
 const selectedPersonIds = $derived(data.personFilters.map((p) => p.id!));
-const hasFilters = $derived(data.personFilters.length > 0 || !!data.documentFilter);
+const hasFilters = $derived(data.personFilters.length > 0);
 
 function rebuildUrl(personIds: string[]) {
 	const url = new URL(window.location.href);
 	url.searchParams.delete('personId');
-	url.searchParams.delete('documentId');
 	for (const id of personIds) url.searchParams.append('personId', id);
 	return url.pathname + url.search;
 }

frontend/src/routes/geschichten/[id]/+page.svelte

@@ -96,25 +96,20 @@ async function handleDelete() {
 		</section>
 	{/if}
 
-	<!-- Dokumente -->
-	{#if g.documents && g.documents.length > 0}
+	<!-- Dokumente (JourneyItems) -->
+	{#if g.items && g.items.some((i) => i.documentId)}
 		<section class="mt-8 border-t border-line pt-6">
 			<h2 class="mb-3 font-sans text-xs font-bold tracking-widest text-ink-2 uppercase">
 				{m.geschichten_documents_section()}
 			</h2>
 			<ul class="flex flex-col gap-2">
-				{#each g.documents as d (d.id)}
+				{#each g.items.filter((i) => i.documentId) as item (item.id)}
 					<li>
 						<a
-							href="/documents/{d.id}"
+							href="/documents/{item.documentId}"
 							class="block rounded border border-line bg-surface px-4 py-3 font-serif text-base text-ink hover:bg-muted"
 						>
-							{d.title}
-							{#if d.documentDate}
-								<span class="ml-2 font-sans text-xs text-ink-3">
-									{formatDate(d.documentDate, 'short')}
-								</span>
-							{/if}
+							{item.note ?? item.documentId}
 						</a>
 					</li>
 				{/each}

frontend/src/routes/geschichten/[id]/edit/+page.svelte

@@ -17,7 +17,6 @@ async function handleSubmit(payload: {
 	body: string;
 	status: 'DRAFT' | 'PUBLISHED';
 	personIds: string[];
-	documentIds: string[];
 }) {
 	submitting = true;
 	errorMessage = null;

frontend/src/routes/geschichten/new/+page.server.ts

@@ -10,24 +10,14 @@ export const load: PageServerLoad = async ({ url, fetch, parent }) => {
 
 	const api = createApiClient(fetch);
 	const personId = url.searchParams.get('personId');
-	const documentId = url.searchParams.get('documentId');
 
-	const [personResult, documentResult] = await Promise.all([
-		personId
-			? api.GET('/api/persons/{id}', { params: { path: { id: personId } } })
-			: Promise.resolve(null),
-		documentId
-			? api.GET('/api/documents/{id}', { params: { path: { id: documentId } } })
-			: Promise.resolve(null)
-	]);
+	const personResult = personId
+		? await api.GET('/api/persons/{id}', { params: { path: { id: personId } } })
+		: null;
 
 	// Silently ignore 404/403 to avoid leaking entity existence on unknown IDs.
 	const initialPersons =
 		personResult && personResult.response.ok && personResult.data ? [personResult.data] : [];
-	const initialDocuments =
-		documentResult && documentResult.response.ok && documentResult.data
-			? [documentResult.data]
-			: [];
 
-	return { initialPersons, initialDocuments };
+	return { initialPersons };
 };

frontend/src/routes/geschichten/new/+page.svelte

@@ -17,7 +17,6 @@ async function handleSubmit(payload: {
 	body: string;
 	status: 'DRAFT' | 'PUBLISHED';
 	personIds: string[];
-	documentIds: string[];
 }) {
 	submitting = true;
 	errorMessage = null;
@@ -58,7 +57,6 @@ async function handleSubmit(payload: {
 
 	<GeschichteEditor
 		initialPersons={data.initialPersons}
-		initialDocuments={data.initialDocuments}
 		onSubmit={handleSubmit}
 		submitting={submitting}
 	/>