Add designed by

client/src/components/Footer.tsx

@@ -192,6 +192,21 @@ const Footer: React.FC = () => {
           </div>
         </div>
       </div>
+      </div>
+        <div className="w-full text-center mt-8 text-sm">
+          <p>
+            Designed by{' '}
+            <a
+              href="https://www.deafgain.org"
+              target="_blank"
+              rel="noopener noreferrer"
+              className="text-yellow-200 hover:text-yellow-400 transition-colors duration-200"
+            >
+              DeafGain, LLC
+            </a>
+          </p>
+        </div>
+      </div>
     </footer>
   );
 };