fix: 🐛 increase auth form width, which was too narrow (#1703)

ui/desktop/app/styles/app.scss

@@ -249,7 +249,7 @@
   padding: (sizing.rems(l) * 4) (sizing.rems(l) * 3) (sizing.rems(l) * 2)
     (sizing.rems(l) * 3);
   position: relative;
-  width: sizing.rems(l) * 16;
+  width: sizing.rems(l) * 26;
 
   &::before {
     background-color: var(--black);