Add two new ad formats to blog articles for increased revenue

Integrates an interstitial overlay ad and a parallax ad into article pages to display advertisements.

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client/src/pages/article.tsx

@@ -12,6 +12,8 @@ import Footer from "@/components/footer";
 import { InArticleAd, PageSideAds } from "@/components/adsense";
 import DOMPurify from "dompurify";
 import ShareButtons from "@/components/share-buttons";
+import InterstitialAd from "@/components/interstitial-ad";
+import ParallaxAd from "@/components/parallax-ad";
 import { useEffect, useMemo } from "react";
 
 const ALLOWED_IFRAME_DOMAINS = [
@@ -337,7 +339,9 @@ export default function ArticlePage() {
 
         <RelatedArticles currentSlug={slug || ""} />
       </main>
+      <ParallaxAd />
       <Footer narrow />
+      <InterstitialAd />
     </div>
   );
 }