Add frontend support for notifications

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

@@ -0,0 +1,12 @@
+import { fetchSubscriptions } from '$lib/api';
+import type { PageServerLoad } from './$types';
+
+export const load: PageServerLoad = async () => {
+	try {
+		const subscriptions = await fetchSubscriptions();
+		return { subscriptions };
+	} catch (error) {
+		console.error('Failed to load subscriptions:', error);
+		return { subscriptions: [] };
+	}
+};