fix(frontend): modal footer buttons visible on mobile (#190)

ModalFooter used flex-col-reverse which caused buttons to display in
reverse order on mobile and potentially pushed cancel button out of
view. Changed to flex-wrap justify-end for consistent cross-platform
button display.

vite-frontend/src/shadcn-bridge/heroui/modal.tsx

@@ -207,7 +207,7 @@ export function ModalFooter({
   return (
     <div
       className={cn(
-        "mt-4 flex flex-col-reverse gap-2 sm:flex-row sm:justify-end",
+        "mt-4 flex flex-wrap justify-end gap-2",
         context?.classNames?.footer,
         className,
       )}