feat: inline critical css

islands/KMenu.tsx

@@ -4,6 +4,7 @@ import { useEventListener } from "@lib/hooks/useEventListener.ts";
 import { menus } from "@islands/KMenu/commands.ts";
 import { MenuEntry } from "@islands/KMenu/types.ts";
 import * as icons from "@components/icons.tsx";
+import { IS_BROWSER } from "$fresh/runtime.ts";
 const KMenuEntry = (
   { entry, activeIndex, index }: {
     entry: MenuEntry;
@@ -150,7 +151,7 @@ export const KMenu = (
     } else {
       input.current?.blur();
     }
-  }, typeof document !== "undefined" ? document?.body : undefined);
+  }, IS_BROWSER ? document?.body : undefined);
 
   return (
     <div