fix(ui): minor UI adjustments on modal-actions

Author: danivek

src/css/styles.css

@@ -1031,7 +1031,10 @@ body {
 .modal-actions {
   display: flex;
   justify-content: flex-end;
-  gap: var(--space-sm);
+  gap: var(--space-md);
+  margin-top: var(--space-lg);
+  padding-top: var(--space-lg);
+  border-top: 1px solid var(--color-border);
 }
 
 .modal-content label {