feat: use unplugin-auto-import instead of vue-global-api

src/components/Footer.vue

@@ -17,7 +17,7 @@ const toggleLocales = () => {
       <carbon-campsite />
     </router-link>
 
-    <button class="icon-btn mx-2 !outline-none" :title="t('button.toggle_dark')" @click="toggleDark">
+    <button class="icon-btn mx-2 !outline-none" :title="t('button.toggle_dark')" @click="toggleDark()">
       <carbon-moon v-if="isDark" />
       <carbon-sun v-else />
     </button>