feat: 增加管理端多语言与多模块界面国际化支持

src/components/admin/auth-gate.tsx

@@ -2,6 +2,7 @@
 
 import { useRouter } from "next/navigation";
 import { useEffect, useState, type ReactNode } from "react";
+import { useTranslation } from "react-i18next";
 
 import { readToken } from "@/stores/admin-token";
 
@@ -10,10 +11,11 @@ type ShellAuthGateProps = {
 };
 
 /**
- * 壳内路由：仅客户端可读 `localStorage` Token，无 Token 时跳转登录。
- * 注意：首屏仍可能先出现服务端渲染的页面片段，再完成跳转（未用 Cookie + middleware 前无法完全避免）。
+ * Shell route guard. Reads the auth token from localStorage on the client and
+ * redirects to the login page when no token is present.
  */
 export function ShellAuthGate({ children }: ShellAuthGateProps) {
+  const { t } = useTranslation("common");
   const router = useRouter();
   const [allowed, setAllowed] = useState(false);
 
@@ -31,7 +33,7 @@ export function ShellAuthGate({ children }: ShellAuthGateProps) {
   if (!allowed) {
     return (
       <div className="flex min-h-[50vh] w-full flex-1 items-center justify-center text-sm text-muted-foreground">
-        正在校验登录状态…
+        {t("auth.checking", { defaultValue: "Checking sign-in status…" })}
       </div>
     );
   }