Add a fixed footer to the article page for consistent navigation

Appends the Footer component to the Article page layout to ensure persistent visibility.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 069d4324-6c40-4355-955e-c714a50de1ea
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/3df548ff-50ae-432f-9be4-25d34eccc983/069d4324-6c40-4355-955e-c714a50de1ea/DGb2VKl

client/src/pages/Article.tsx

@@ -8,6 +8,7 @@ import { Input } from "@/components/ui/input";
 import { TrendingUp, TrendingDown, DollarSign, Clock } from "lucide-react";
 import { useToast } from "@/hooks/use-toast";
 import { apiRequest, queryClient } from "@/lib/queryClient";
+import Footer from "@/components/Footer";
 import type { Article, PredictionMarket } from "@shared/schema";
 
 export default function Article() {
@@ -364,6 +365,9 @@ export default function Article() {
           )}
         </section>
       </main>
+
+      {/* Footer */}
+      <Footer />
     </div>
   );
 }