refactor(notification): extract handleViewAll named function

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

frontend/src/lib/notification/NotificationDropdown.svelte

@@ -12,6 +12,12 @@ type Props = {
 };
 
 let { notifications, onMarkRead, onMarkAllRead, onClose }: Props = $props();
+
+function handleViewAll(e: MouseEvent) {
+	e.preventDefault();
+	onClose();
+	goto('/aktivitaeten');
+}
 </script>
 
 <div
@@ -130,7 +136,7 @@ let { notifications, onMarkRead, onMarkAllRead, onClose }: Props = $props();
 	<div class="border-t border-line px-4 py-2">
 		<a
 			href="/aktivitaeten"
-			onclick={(e) => { e.preventDefault(); onClose(); goto('/aktivitaeten'); }}
+			onclick={handleViewAll}
 			class="text-xs font-medium text-ink-2 transition-colors hover:text-ink"
 		>
 			{m.chronik_view_all()}