fix: correct magic link API endpoint path

Frontend was calling /auth/magic-link/request but the backend
route is POST /auth/magic-link, causing a 404.

web/src/routes/auth/anmelden/+page.server.ts

@@ -52,7 +52,7 @@ export const actions: Actions = {
 		const email = form.get('email') as string;
 
 		try {
-			await apiFetch<MessageData>('/auth/magic-link/request', {
+			await apiFetch<MessageData>('/auth/magic-link', {
 				method: 'POST',
 				body: JSON.stringify({ email }),
 				fetch