Refactor code structure for improved readability and maintainability

src/App.vue

@@ -9,6 +9,10 @@ const { updateProfile } = useUserStore();
 const platform = usePlatform();
 const { checkAndPromptUpdate } = useAppUpdate();
 
+onBeforeMount(() => {
+  loadSavedLanguage();
+});
+
 onMounted(() => {
   if (!isAuthenticated.value)
     return;
@@ -26,10 +30,6 @@ onMounted(() => {
   }
 });
 
-onBeforeMount(() => {
-  loadSavedLanguage();
-});
-
 watch(locale, (newLocale) => {
   document.querySelector("html")?.setAttribute("lang", newLocale);
 }, { immediate: true });