style: 更新登录页面背景图片

- 注释掉原有的登录背景图片
- 添加新的背景图片："tao.png"

src/views/login.vue

@@ -161,7 +161,8 @@ export default {
   justify-content: center;
   align-items: center;
   height: 100%;
-  background-image: url("../assets/images/login-background.jpg");
+  //background-image: url("../assets/images/login-background.jpg");
+  background-image: url("../assets/images/tao.png");
   background-size: cover;
 }
 .title {