fix(journeyinterlude): use i18n aria-label instead of hardcoded German

Replaces aria-label="Kuratorennotiz" with m.journey_interlude_aria_label()
so screen readers get the correct label in all three supported locales.

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

frontend/src/lib/geschichte/JourneyInterlude.svelte

@@ -1,4 +1,6 @@
 <script lang="ts">
+import { m } from '$lib/paraglide/messages.js';
+
 interface Props {
 	note: string;
 }
@@ -7,7 +9,7 @@ let { note }: Props = $props();
 </script>
 
 <div
-	aria-label="Kuratorennotiz"
+	aria-label={m.journey_interlude_aria_label()}
 	class="my-2 border-l-4 border-journey-border bg-journey-tint px-4 py-3"
 >
 	<p