feat(journey-editor): branch edit page on geschichte type

Static imports for both editors; type-aware <h1> title; JOURNEY type routes
to JourneyEditor, STORY type continues to GeschichteEditor unchanged.

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

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

@@ -2,6 +2,7 @@
 import { goto } from '$app/navigation';
 import { m } from '$lib/paraglide/messages.js';
 import GeschichteEditor from '$lib/geschichte/GeschichteEditor.svelte';
+import JourneyEditor from '$lib/geschichte/JourneyEditor.svelte';
 import BackButton from '$lib/shared/primitives/BackButton.svelte';
 import { getErrorMessage } from '$lib/shared/errors';
 import { csrfFetch } from '$lib/shared/cookies';
@@ -12,6 +13,8 @@ let { data }: { data: PageData } = $props();
 let submitting = $state(false);
 let errorMessage: string | null = $state(null);
 
+const isJourney = $derived(data.geschichte.type === 'JOURNEY');
+
 async function handleSubmit(payload: {
 	title: string;
 	body: string;
@@ -44,7 +47,8 @@ async function handleSubmit(payload: {
 	</div>
 
 	<h1 class="mb-6 font-serif text-3xl font-bold text-ink">
-		{m.btn_edit()}: {data.geschichte.title}
+		{isJourney ? m.journey_edit_title_journey() : m.journey_edit_title_story()}:
+		{data.geschichte.title}
 	</h1>
 
 	{#if errorMessage}
@@ -56,5 +60,13 @@ async function handleSubmit(payload: {
 		</div>
 	{/if}
 
-	<GeschichteEditor geschichte={data.geschichte} onSubmit={handleSubmit} submitting={submitting} />
+	{#if isJourney}
+		<JourneyEditor geschichte={data.geschichte} onSubmit={handleSubmit} submitting={submitting} />
+	{:else}
+		<GeschichteEditor
+			geschichte={data.geschichte}
+			onSubmit={handleSubmit}
+			submitting={submitting}
+		/>
+	{/if}
 </div>