refactor(course): 重构课程创建组件以支持文件选择和预览功能

- 将 AddVideo.vue 重命名为 chooseFileList.vue 并优化其内部逻辑
- 引入 watch API 并调整组件结构以提升响应性
- 更新事件发射器 saveContent 为 chooseItem 以匹配新流程
- 移除视频对话框相关代码并将其功能迁移至独立组件
- 在 createCourse.vue 中新增设置和预览弹窗逻辑
- 调整 dragTable.vue 的编辑和删除方法以传递完整的记录对象
- 统一使用响应式数据处理代替部分 refs 用法以简化状态管理
- 清理无关注释及调试语句提高代码可读性和维护性

src/components/CreatedCourse/preview/VideoComp.vue

@@ -0,0 +1,109 @@
+<script setup>
+import {
+  ElForm,
+  ElFormItem,
+  ElInput,
+  ElInputNumber,
+  ElRadio,
+  ElRadioGroup,
+} from "element-plus";
+
+const props = defineProps({
+  dialogVideoForm: {
+    type: Object,
+    default: () => ({
+      name: "",
+      filePath: "",
+      isDrag: true,
+      completeSetup: 0,
+      setupTage: 0,
+    }),
+  },
+  isPreview: {
+    type: Boolean,
+    default: false,
+  },
+});
+
+import { ref, watch } from "vue";
+// Create a reactive copy of the prop for local modifications
+const localDialogVideoForm = ref({ ...props.dialogVideoForm });
+
+// Watch for changes in the prop and update the local copy
+watch(
+  () => props.dialogVideoForm,
+  (newVal) => {
+    Object.assign(localDialogVideoForm.value, newVal);
+  },
+  { deep: true }
+);
+
+// Emit updates to parent component
+const emit = defineEmits(["update:dialogVideoForm"]);
+
+// Update form values and emit changes
+const updateFormValue = (field, value) => {
+  localDialogVideoForm.value[field] = value;
+  emit("update:dialogVideoForm", { ...localDialogVideoForm.value });
+};
+</script>
+
+<template>
+  <el-form>
+    <el-form-item label="视频名称" v-if="!isPreview">
+      <el-input
+        v-model="localDialogVideoForm.name"
+        @update:modelValue="(val) => updateFormValue('name', val)"
+      ></el-input>
+    </el-form-item>
+    <!-- Added video type prop -->
+    <video
+      controls
+      style="width: 100%; max-height: 400px"
+      class="mb10"
+      :key="localDialogVideoForm.filePath"
+    >
+      <source
+        :src="
+          'http://home.hzer.xyz:9960/upload/' + localDialogVideoForm.filePath
+        "
+        type="video/mp4"
+      />
+      您的浏览器不支持video
+    </video>
+    <el-form-item label="是否允许拖拽" v-if="!isPreview">
+      <el-radio-group
+        :model-value="localDialogVideoForm.isDrag"
+        @update:modelValue="(val) => updateFormValue('isDrag', val)"
+        size="small"
+      >
+        <el-radio :label="true" border>是</el-radio>
+        <el-radio :label="false" border>否</el-radio>
+      </el-radio-group>
+    </el-form-item>
+    <el-form-item label="完成规则设置" v-if="!isPreview">
+      <el-radio-group
+        :model-value="localDialogVideoForm.completeSetup"
+        @update:modelValue="(val) => updateFormValue('completeSetup', val)"
+      >
+        <el-radio :label="0">默认(系统自动控制)</el-radio>
+        <el-radio :label="1">
+          按进度
+          <el-input-number
+            :disabled="localDialogVideoForm.completeSetup === 0"
+            :model-value="localDialogVideoForm.setupTage"
+            @update:modelValue="(val) => updateFormValue('setupTage', val)"
+            size="mini"
+            :min="0"
+            :max="100"
+            label="描述文字"
+            controls-position="right"
+          ></el-input-number>
+          %
+        </el-radio>
+      </el-radio-group>
+    </el-form-item>
+  </el-form>
+</template>
+
+<style scoped lang="scss"></style>