fix: prevent JS error into handleSearchHotKey method when algolia is enabled

src/client/theme-default/components/VPNavBarSearch.vue

@@ -51,9 +51,9 @@ onMounted(() => {
 
   preconnect()
 
-  const handleSearchHotKey = (event: KeyboardEvent) => {
+  const handleSearchHotKey = (event?: KeyboardEvent) => {
     if (
-      (event.key.toLowerCase() === 'k' && (event.metaKey || event.ctrlKey)) ||
+      (event?.key.toLowerCase() === 'k' && (event.metaKey || event.ctrlKey)) ||
       (!isEditingContent(event) && event.key === '/')
     ) {
       event.preventDefault()