refactor: 替换管理员登录组件并更新会话管理

src/lib/admin-token-local-storage.ts

@@ -1,21 +0,0 @@
-const STORAGE_KEY = "lottery_admin_token";
-
-export function readStoredAdminToken(): string | null {
-  if (typeof window === "undefined") {
-    return null;
-  }
-  const raw = window.localStorage.getItem(STORAGE_KEY)?.trim();
-
-  return raw && raw !== "" ? raw : null;
-}
-
-export function writeStoredAdminToken(token: string | null): void {
-  if (typeof window === "undefined") {
-    return;
-  }
-  if (token && token.trim() !== "") {
-    window.localStorage.setItem(STORAGE_KEY, token.trim());
-  } else {
-    window.localStorage.removeItem(STORAGE_KEY);
-  }
-}