fix(courselibrary): 优化删除确认弹窗及调试信息

- 统一使用 $messageBox 替代 ElMessageBox
- 修改确认按钮文字为"确认"
- 删除无用的调试信息展示
- 优化删除提示文案格式

src/views/courselibrary/components/createCourse.vue

@@ -1,6 +1,6 @@
 <script setup>
 import dragCollapse from "./dragCollapse.vue";
-import { ElButton, ElCheckbox, ElDialog, ElMessageBox } from "element-plus";
+import { ElButton, ElCheckbox, ElDialog } from "element-plus";
 import { $message, $messageBox } from "@/utils/useMessage";
 import dragTable from "./dragTable.vue";
 import { ref, watch } from "vue";
@@ -189,8 +189,8 @@ const deleteRow = (data) => {
   courseMetadata.selectionIndex = data.selectionIndex;
 
   $messageBox
-    .confirm(`确定删除${data.record.name}吗？`, "删除确认", {
-      confirmButtonText: "确定",
+    .confirm(`确定删除【${data.record.name}】吗？`, "删除确认", {
+      confirmButtonText: "确认",
       cancelButtonText: "取消",
       type: "error",
     })
@@ -349,7 +349,6 @@ const handleNext = () => {
     </el-dialog>
 
     <div class="p10 pst-s bg-w bottom0">
-      {{ courseList }}
       <el-button>取消</el-button>
       <el-button type="primary">存草稿</el-button>
       <el-button @click="handleNext" type="primary">下一步</el-button>