Fix modal close button on samples page

The samples page never called setupModal(), so the close button,
Escape key, and backdrop click handlers were never registered.
Add the missing setupModal() call matching all other pages.

website/src/scripts/pages/samples.ts

@@ -5,6 +5,7 @@
 import { FuzzySearch, type SearchableItem } from "../search";
 import { fetchData, escapeHtml } from "../utils";
 import { createChoices, getChoicesValues, type Choices } from "../choices";
+import { setupModal } from "../modal";
 
 // Types
 interface Language {
@@ -82,6 +83,7 @@ export async function initSamplesPage(): Promise<void> {
     search = new FuzzySearch(allRecipes);
 
     // Setup UI
+    setupModal();
     setupFilters();
     setupSearch();
     renderCookbooks();