feat: auto-opening brochure modal with mintel/mail delivery

- implemented BrochureDeliveryEmail template

- created AutoBrochureModal wrapper with 5s delay

- updated layout.tsx and BrochureCTA to use new success state

- added tests/brochure-modal.test.ts e2e test

components/AutoBrochureModal.tsx

@@ -0,0 +1,28 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import dynamic from 'next/dynamic';
+
+const BrochureModal = dynamic(() => import('./BrochureModal'), { ssr: false });
+
+export default function AutoBrochureModal() {
+  const [isOpen, setIsOpen] = useState(false);
+
+  useEffect(() => {
+    // Check if user has already seen or interacted with the modal
+    const hasSeenModal = localStorage.getItem('klz_brochure_modal_seen');
+
+    if (!hasSeenModal) {
+      // Auto-open after 5 seconds to not interrupt immediate page load
+      const timer = setTimeout(() => {
+        setIsOpen(true);
+        // Mark as seen so it doesn't bother them again on next page load
+        localStorage.setItem('klz_brochure_modal_seen', 'true');
+      }, 5000);
+
+      return () => clearTimeout(timer);
+    }
+  }, []);
+
+  return <BrochureModal isOpen={isOpen} onClose={() => setIsOpen(false)} />;
+}