feat(monetization): Add A2A Routing Fee and Developer Ad Placeholder

apps/web/src/app/tasks/[id]/page.tsx

@@ -104,6 +104,31 @@ export default async function TaskDetails({ params }: { params: Promise<{ id: st
                 </div>
               </section>
             </div>
+
+            {/* Right Column: Sponsored Ad / Monetization */}
+            <div className="md:col-span-1">
+              <div className="bg-gray-950 border border-gray-800 rounded-2xl p-6 sticky top-8 shadow-xl">
+                <div className="flex items-center justify-between mb-4">
+                  <span className="text-[10px] text-gray-500 uppercase tracking-widest font-bold">Sponsored</span>
+                  <span className="text-[10px] text-gray-600 bg-gray-900 px-2 py-0.5 rounded">Ad</span>
+                </div>
+                
+                <a href="#" className="block bg-gray-900 border border-gray-800 rounded-xl p-5 flex flex-col items-center text-center hover:border-blue-500/50 transition-all duration-300 cursor-pointer group relative overflow-hidden hover:shadow-2xl hover:shadow-blue-500/10">
+                  <div className="absolute inset-0 bg-gradient-to-br from-blue-500/5 to-purple-500/5 opacity-0 group-hover:opacity-100 transition-opacity"></div>
+                  
+                  <div className="w-14 h-14 bg-gradient-to-br from-gray-800 to-gray-900 rounded-xl flex items-center justify-center mb-4 border border-gray-700 group-hover:scale-110 transition-transform duration-300 shadow-inner">
+                    <span className="text-2xl">⚡️</span>
+                  </div>
+                  
+                  <h4 className="text-gray-100 font-bold mb-2 group-hover:text-blue-400 transition-colors">Build faster with Vercel</h4>
+                  <p className="text-xs text-gray-400 mb-5 leading-relaxed">Deploy your AI agents instantly. Zero configuration required. The platform for frontend frameworks and static sites.</p>
+                  
+                  <button className="w-full bg-gray-100 text-gray-900 font-semibold py-2.5 rounded-lg text-sm hover:bg-white transition-colors">
+                    Start Free Trial
+                  </button>
+                </a>
+              </div>
+            </div>
           </div>
 
           <div className="bg-gray-950 rounded-xl p-6 border border-gray-800 mt-8">