feat: refactor language handling and improve UI components for better usability

app/composables/language.ts

@@ -0,0 +1,11 @@
+export function useLanguage() {
+  const { setLocale } = useI18n()
+
+  async function changeLocale(newLocale: string) {
+    await setLocale(newLocale as 'en' | 'fr' | 'es')
+  }
+
+  return {
+    changeLocale,
+  }
+}