fix: update media query breakpoint for AuthModal styles

Author: atyrode

src/frontend/src/styles/AuthModal.scss

@@ -157,7 +157,7 @@
 }
 
 /* Media query for screens under 700x700 */
-@media (max-width: 700px), (max-height: 700px) {
+@media (max-width: 734px), (max-height: 700px) {
   .auth-modal-container {
     max-width: 100%;
     width: 100%;