refactor: 优化请求封装

- 优化Result接口定义
- 新增响应数据解析逻辑
- 优化错误解析逻辑

src/types/axios.ts

@@ -1,10 +1,10 @@
 export interface Result<T = unknown> {
+  isSuccess: boolean;
   code: number;
   data: T;
-  errorMsg: string;
-  extra: unknown;
-  isSuccess: boolean;
   msg: string;
-  path?: string;
+  errorMsg: string;
   timestamp: string;
+  path: string | null;
+  extra: Record<string, any> | null;
 }