style: add border to Card

Author: lorenzocorallo

src/components/ui/card.tsx

@@ -9,7 +9,7 @@ const Card = React.forwardRef<
   <div
     ref={ref}
     className={cn(
-      "rounded-lg bg-card text-card-foreground shadow-md",
+      "rounded-lg bg-card text-card-foreground shadow-md border",
       className,
     )}
     {...props}