fix(upload): 统一使用$message提示并优化文件校验逻辑

- 移除重复引入的ElMessage组件
- 使用$message.error替换ElMessage错误提示
- 添加文件上传前的console.log调试信息
- 优化文件格式和大小校验的提示逻辑
- 在dragTable.vue中使用ElInput组件替换原生input
- 优化HomeWorkComp.vue中附件显示条件判断

chore(style): 统一element-plus弹窗样式

- 为el-dialog和el-message-box添加圆角样式
- 调整消息框标题和内容的字体样式
- 优化按钮样式和间距布局
- 规范化弹窗内部元素的显示效果

src/components/CreatedCourse/chooseFileList.vue

@@ -1,7 +1,7 @@
 <script setup>
 import { reactive, onMounted, ref, h } from "vue";
 import { ElButton, ElInput, ElUpload } from "element-plus";
-import { $message, ElMessage } from "@/utils/useMessage";
+import { $message } from "@/utils/useMessage";
 import BasicTable from "@/components/BasicElTable/BasicTable.vue";
 import {
   getPageListByType,
@@ -248,12 +248,13 @@ const handleUploadSuccess = (res, file) => {
 
 // 上传前处理
 const handleBeforeUpload = (file) => {
+  console.log(file);
   const { fileType, name, uploadSize, uploadSizeName } = getMapsItem(
     props.resType
   );
 
   if (file.name.lastIndexOf(".") === -1) {
-    ElMessage({ message: `文件格式不正确!`, type: "error", offset: 100 });
+    $message.error(`文件格式不正确!`);
     return false;
   }
 
@@ -262,11 +263,7 @@ const handleBeforeUpload = (file) => {
 
   // 校检文件类型
   if (fileType.join(",").indexOf(fileExtension) === -1) {
-    ElMessage({
-      message: `文件格式不正确, 请上传正确格式的${name}文件!`,
-      type: "error",
-      offset: 100,
-    });
+    $message.error(`文件格式不正确, 请上传正确格式的${name}文件!`);
     return false;
   }
 
@@ -274,11 +271,7 @@ const handleBeforeUpload = (file) => {
   if (uploadSize) {
     const isLt = file.size / 1024 / 1024 < uploadSize;
     if (!isLt) {
-      ElMessage({
-        message: `上传文件大小不能超过 ${uploadSizeName} !`,
-        type: "error",
-        offset: 100,
-      });
+      $message.error(`上传文件大小不能超过 ${uploadSizeName} !`);
       return false;
     }
   }

src/components/CreatedCourse/preview/HomeWorkComp.vue

@@ -75,7 +75,7 @@ const removeHomeworkFile = () => {
       ></el-input>
     </el-form-item>
     <el-form-item label="附件">
-      <div v-if="localDialogVideoForm.file !== ''" class="flex align-center">
+      <div v-if="localDialogVideoForm.file" class="flex align-center">
         <a :href="fileBaseUrl + localDialogVideoForm.file" target="_blank"
           >下载作业附件
         </a>