fix: feature flag booking widget and sitewidealert

app/[lang]/(live)/@bookingwidget/loading.tsx

@@ -1,8 +1,14 @@
+import { env } from "@/env/server"
+
 import LoadingSpinner from "@/components/LoadingSpinner"
 
 import styles from "./loading.module.css"
 
 export default function LoadingBookingWidget() {
+  if (env.HIDE_FOR_NEXT_RELEASE) {
+    return null
+  }
+
   return (
     <div className={styles.container}>
       <LoadingSpinner />