chore: update version to 0.9.31 in package.json and add magic link authentication strings in English and Chinese

src/routes/login/MagicLinkLogin.tsx

@@ -1,4 +1,5 @@
 import { useNavigate } from "react-router-dom";
+import { useTranslation } from "react-i18next";
 
 import Button from "@/components/styled/Button";
 
@@ -7,13 +8,14 @@ type Props = {
 };
 export default function MagicLinkLogin({ email }: Props) {
   const navigate = useNavigate();
+  const { t } = useTranslation("auth", { keyPrefix: "login" });
   const handleLogin = () => {
     navigate(`/send_magic_link/${email}`);
   };
 
   return (
     <Button className="w-full ghost" onClick={handleLogin}>
-      Sign in with a Magic Link
+      {t("magic_link")}
     </Button>
   );
 }