feat: Dispatch 'profile-updated' event after avatar update to trigger UI refresh.

src/app/(agent)/agent/dashboard/page.tsx

@@ -206,6 +206,9 @@ export default function AgentDashboard() {
         console.error('Failed to get presigned URL for new avatar:', err);
       }
     }
+
+    // Notify header and other components to refresh avatar
+    window.dispatchEvent(new Event('profile-updated'));
   };
 
   const getProfileImageUrl = () => {