feat：1. 调整项目结构，将API接口定义单独抽离 2. 将倒计时计算逻辑调整到后端进行处理计算 3. 增加铃声提示功能

src/utils/request.ts

@@ -1,7 +1,7 @@
 import axios from 'axios';
 import { ElMessage } from "element-plus";
 
-const basic_url = "http://localhost:8081";
+const basic_url = "http://localhost:5157";
 
 const axiosInstance = axios.create({
     baseURL: basic_url,
@@ -27,12 +27,15 @@ const validateResponse = (res: any) => {
     return result;
 };
 
-const get = (url: string, params: {}) => {
+function get(url: string, params: Record<string, any>): Promise<any>;
+function get(url: string): Promise<any>;
+
+function get(url: string, params: Record<string, any> = {}) {
     console.log("开始GET请求", basic_url + url, "参数：", params);
     return axiosInstance.get(url, { params })
         .then(validateResponse)
         .catch(handleError);
-};
+}
 
 const post = (url: string, data: any = null, config: any = {}) => {
     console.log("开始POST请求", url, "参数：", data, "配置：", config);