fix(前端)：进度环方向 + 按钮颜色 + 删除确认 + 移除 console.log

- StartTask.vue：progress 计算改为 (total-current)/total*100，进度环从
  满到空递减（正确方向）
- ReviewDetail/ReviewRecall/MindMapViewer：type="primary" 全部改为
  type="success"，统一绿白主题
- Study.vue：删除任务增加 ElMessageBox.confirm 确认
- request.ts：移除全部 console.log

src/utils/request.ts

@@ -11,7 +11,6 @@ const axiosInstance = axios.create({
 });
 
 const handleError = (error: any) => {
-    console.log(error);
 
     // 401 未授权：token 过期或未登录，直接跳转登录页
     if (error?.response?.status === 401) {
@@ -49,14 +48,12 @@ 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);
 
     if (config.params) {
         // 如果传入 config.params，则作为 URL 参数
@@ -72,14 +69,12 @@ const post = (url: string, data: any = null, config: any = {}) => {
 };
 
 const put = (url: string, data: any, config: any = {}) => {
-    console.log("开始PUT请求", basic_url + url, "参数：", data);
     return axiosInstance.put(url, data, config)
         .then(validateResponse)
         .catch(handleError);
 };
 
 const del = (url: string, params: Record<string, any> = {}, config: any = {}) => {
-    console.log("开始DELETE请求", basic_url + url, "参数：", params);
     return axiosInstance.delete(url, { params, ...config })
         .then(validateResponse)
         .catch(handleError);