fix(ui): 🐛 re-add selected button variant

Author: EightBitByte

src/components/ui/button.tsx

@@ -19,6 +19,8 @@ const buttonVariants = cva(
         ghost:
           "hover:bg-accent hover:text-accent-foreground dark:hover:bg-accent/50",
         link: "text-primary underline-offset-4 hover:underline",
+        selected:
+          "bg-selected text-primary-foreground shadow-xs hover:bg-selected/90",
       },
       size: {
         default: "h-9 px-4 py-2 has-[>svg]:px-3",