fix: remove focus:ring-2 from darkmode

Author: shinokada

src/lib/darkmode/theme.ts

@@ -1,5 +1,5 @@
 import { tv } from "tailwind-variants";
 
 export const darkmode = tv({
-  base: "text-gray-500 dark:text-gray-400 hover:bg-gray-100 dark:hover:bg-gray-700 focus:outline-hidden rounded-lg text-sm p-2.5 focus:ring-2"
+  base: "text-gray-500 dark:text-gray-400 hover:bg-gray-100 dark:hover:bg-gray-700 focus:outline-hidden rounded-lg text-sm p-2.5"
 });