Initial frontend import

src/admin/token.ts

@@ -0,0 +1,13 @@
+const KEY = "ark_admin_token";
+
+export function getToken() {
+  return localStorage.getItem(KEY) || "";
+}
+
+export function setToken(t: string) {
+  localStorage.setItem(KEY, t);
+}
+
+export function clearToken() {
+  localStorage.removeItem(KEY);
+}

src/admin/useAdminT.ts

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+import { useCallback } from "react";
+import { tLang } from "../i18n";
+
+/** Admin area always uses 繁體中文, independent of site language. */
+export function useAdminT() {
+  return useCallback((key: string) => tLang("zh-TW", key), []);
+}