Add an advertisement below the featured articles carousel

Add a horizontal ad slot below the featured articles carousel on the homepage.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 413891e8-d784-4bea-b9f5-91a5a68316b4
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: 0f7c7063-c9cd-4e75-9134-b941ff88c598
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/f209e72a-0939-48fa-84fc-57854de71967/413891e8-d784-4bea-b9f5-91a5a68316b4/igVW4lQ
Replit-Helium-Checkpoint-Created: true

client/src/pages/home.tsx

@@ -242,6 +242,14 @@ export default function Home() {
           <FeaturedSection articles={featured} />
         )}
 
+        <div className="mb-8 rounded-md border border-card-border bg-card overflow-hidden">
+          <AdSense
+            slot="auto"
+            format="horizontal"
+            style={{ display: "block", minHeight: "90px" }}
+          />
+        </div>
+
         <div className="grid grid-cols-1 lg:grid-cols-3 gap-8">
           <div className="lg:col-span-2">
             {isLoading ? (