fix: 修复 Axios 错误处理中的类型断言问题

在 Http 类的错误处理逻辑中，修改了对 apiError 的类型断言方式，以确保正确地将 statusCode 和 response 属性添加到 Error 对象中。使用 `unknown as Record<string, unknown>` 来替代之前的 `Record<string, unknown>` 方式，以增强类型安全性和兼容性。

Author: ExquisiteCore

frontend/lib/axios.ts

@@ -108,8 +108,8 @@ class Http {
           // 从 ApiResponse 中提取错误信息
           const message = data?.message || `请求失败 (${status})`;
           const apiError = new Error(message);
-          (apiError as Record<string, unknown>).statusCode = status;
-          (apiError as Record<string, unknown>).response = error.response;
+          (apiError as unknown as Record<string, unknown>).statusCode = status;
+          (apiError as unknown as Record<string, unknown>).response = error.response;
           return Promise.reject(apiError);
         } else if (error.request) {
           return Promise.reject(new Error('网络错误，无法连接到服务器'));