fix: import i18n in Auth.vue to fix TS error

src/pages/Auth.vue

@@ -217,7 +217,7 @@ import Logo from "@/components/Logo.vue";
 import LanguageSwitcher from "@/components/LanguageSwitcher.vue";
 import { loginUser, registerUser, forgotPassword, resetPassword, socialLogin } from "@/lib/api";
 import { useAuthStore } from "@/stores/auth";
-import { currentLanguage } from "@/i18n";
+import i18n, { currentLanguage } from "@/i18n";
 
 type AuthMode = "login" | "register" | "forgot" | "reset";
 const { t } = useI18n();