fix(NavigationMenu): render children in ssr

Author: alexfriesen

src/runtime/components/NavigationMenu.vue

@@ -394,7 +394,7 @@ function getAccordionDefaultValue(list: NavigationMenuItem[], level = 0) {
     </component>
   </DefineItemTemplate>
 
-  <NavigationMenuRoot v-bind="{ ...rootProps, ...$attrs }" :data-collapsed="collapsed" :class="ui.root({ class: [props.ui?.root, props.class] })">
+  <NavigationMenuRoot v-bind="{ ...rootProps, ...$attrs }" :data-collapsed="collapsed" :class="ui.root({ class: [props.ui?.root, props.class] })" :unmountOnHide="false">
     <slot name="list-leading" />
 
     <template v-for="(list, listIndex) in lists" :key="`list-${listIndex}`">