feat: adicionar crédito idealpages no rodapé com link WhatsApp

frontend/src/components/Footer.tsx

@@ -171,9 +171,22 @@ export default function Footer() {
         </div>
 
         <div className="border-t border-white/10 pt-8 flex flex-col md:flex-row justify-between items-center gap-4">
+          <div className="flex flex-col items-center md:items-start gap-2">
             <p className="text-gray-500 text-sm">
               © {new Date().getFullYear()} OCCTO Engenharia. {t('footer.rights')}
             </p>
+            <p className="text-gray-500 text-xs">
+              Desenvolvido por{' '}
+              <a 
+                href="https://wa.me/5513998030036" 
+                target="_blank" 
+                rel="noopener noreferrer"
+                className="text-primary hover:underline font-medium"
+              >
+                idealpages
+              </a>
+            </p>
+          </div>
           <div className="flex gap-6 text-sm text-gray-500">
             <Link href={`${prefix}/privacidade`} className="hover:text-white">{t('footer.privacyPolicy')}</Link>
             <Link href={`${prefix}/termos`} className="hover:text-white">{t('footer.termsOfUse')}</Link>