style(ruoyi-ui): 更新登录页面样式

- 移除登录页面底部的版权所有信息
- 更改登录背景图片为 SaiLun.jpg
- 注释掉原有的背景图片路径

ruoyi-ui/src/views/login.vue

@@ -56,7 +56,7 @@
     </el-form>
     <!--  底部  -->
     <div class="el-login-footer">
-      <span>Copyright © 2018-2024 ruoyi.vip All Rights Reserved.</span>
+      <span>Copyright © 2018-2024</span>
     </div>
   </div>
 </template>
@@ -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/SaiLun.jpg");
   background-size: cover;
 }
 .title {