diff --git a/reading-platform-frontend/src/components/course-edit/Step2CourseIntro.vue b/reading-platform-frontend/src/components/course-edit/Step2CourseIntro.vue
index 6dffe1a..ae84057 100644
--- a/reading-platform-frontend/src/components/course-edit/Step2CourseIntro.vue
+++ b/reading-platform-frontend/src/components/course-edit/Step2CourseIntro.vue
@@ -2,7 +2,6 @@
   <div class="step2-course-intro">
     <div class="intro-header">
       <span class="title">课程介绍</span>
-      <a-tag color="blue">已填写 {{ filledCount }} / 8</a-tag>
     </div>
 
     <a-tabs v-model:activeKey="activeTab" type="card">
@@ -176,20 +175,6 @@ watch(
 // 计算当前tab索引
 const currentTabIndex = computed(() => tabKeys.indexOf(activeTab.value));
 
-// 计算已填写的数量
-const filledCount = computed(() => {
-  let count = 0;
-  if (formData.introSummary) count++;
-  if (formData.introHighlights) count++;
-  if (formData.introGoals) count++;
-  if (formData.introSchedule) count++;
-  if (formData.introKeyPoints) count++;
-  if (formData.introMethods) count++;
-  if (formData.introEvaluation) count++;
-  if (formData.introNotes) count++;
-  return count;
-});
-
 // 上一个tab
 const prevTab = () => {
   const index = currentTabIndex.value;
@@ -221,7 +206,6 @@ const validate = () => {
 defineExpose({
   validate,
   formData,
-  filledCount,
 });
 </script>
 
diff --git a/reading-platform-frontend/src/components/course/FileUploader.vue b/reading-platform-frontend/src/components/course/FileUploader.vue
index f3c3a66..0f2654a 100644
--- a/reading-platform-frontend/src/components/course/FileUploader.vue
+++ b/reading-platform-frontend/src/components/course/FileUploader.vue
@@ -120,15 +120,6 @@ const imagePreviewLoading = ref(false);
 const imagePreviewLoaded = ref(false);
 const imagePreviewError = ref(false);
 
-// 监听 previewUrl 变化，重置加载状态
-watch(() => previewUrl.value, (newUrl) => {
-  if (newUrl && props.fileType === 'image') {
-    imagePreviewLoading.value = true;
-    imagePreviewLoaded.value = false;
-    imagePreviewError.value = false;
-  }
-}, { immediate: true });
-
 const buttonText = computed(() => {
   const typeMap: Record<string, string> = {
     video: '上传视频',
@@ -181,6 +172,19 @@ const previewUrl = computed(() => {
   return `/uploads/${props.filePath}`;
 });
 
+// 须在 previewUrl 定义之后：watch 回调会读 previewUrl，避免 TDZ（Cannot access before initialization）
+watch(
+  () => previewUrl.value,
+  (newUrl) => {
+    if (newUrl && props.fileType === 'image') {
+      imagePreviewLoading.value = true;
+      imagePreviewLoaded.value = false;
+      imagePreviewError.value = false;
+    }
+  },
+  { immediate: true }
+);
+
 // 检查是否为 PDF 文件（用于 ppt 类型也支持 PDF 预览）
 const isPdfFile = computed(() => {
   if (props.fileType === 'ppt' && props.filePath) {
diff --git a/reading-platform-frontend/src/components/course/LessonConfigPanel.vue b/reading-platform-frontend/src/components/course/LessonConfigPanel.vue
index 7bf2005..b606050 100644
--- a/reading-platform-frontend/src/components/course/LessonConfigPanel.vue
+++ b/reading-platform-frontend/src/components/course/LessonConfigPanel.vue
@@ -25,7 +25,9 @@
               style="width: 100%"
               @change="handleChange"
             />
-            <span class="duration-unit">分钟</span>
+            <a-form-item-rest>
+              <span class="duration-unit">分钟</span>
+            </a-form-item-rest>
           </a-form-item>
         </a-col>
       </a-row>
@@ -137,11 +139,13 @@
       </template>
       <div class="field-hint">至少添加一个环节，每个环节需填写名称、内容、目标</div>
       <a-form-item name="steps">
-      <LessonStepsEditor
-        v-model="lessonData.steps"
-        :show-template="showTemplate"
-        @change="handleChange"
-      />
+        <a-form-item-rest>
+          <LessonStepsEditor
+            v-model="lessonData.steps"
+            :show-template="showTemplate"
+            @change="handleChange"
+          />
+        </a-form-item-rest>
       </a-form-item>
     </a-card>
 
diff --git a/reading-platform-frontend/src/views/admin/courses/CourseEditView.vue b/reading-platform-frontend/src/views/admin/courses/CourseEditView.vue
index 488a1d4..4fd40d4 100644
--- a/reading-platform-frontend/src/views/admin/courses/CourseEditView.vue
+++ b/reading-platform-frontend/src/views/admin/courses/CourseEditView.vue
@@ -18,8 +18,11 @@
       </a-page-header>
     </div>
 
-    <a-spin :spinning="loading" tip="正在加载课程数据...">
-      <a-card :bordered="false" style="margin-top: 16px;">
+    <!-- 编辑态：数据未就绪时单独展示加载，避免 a-spin 包裹整表在 spinning 切换时与大量子组件补丁竞态导致 __vnode 报错 -->
+    <div v-if="!pageContentReady" class="course-edit-page-loading">
+      <a-spin size="large" tip="正在加载课程数据..." />
+    </div>
+    <a-card v-else :bordered="false" style="margin-top: 16px;">
         <!-- 步骤导航 -->
         <a-steps :current="currentStep" size="small" @change="onStepChange">
           <a-step title="基本信息" />
@@ -62,12 +65,11 @@
             @change="handleDataChange" />
         </div>
       </a-card>
-    </a-spin>
   </div>
 </template>
 
 <script setup lang="ts">
-import { ref, reactive, computed, onMounted, provide } from 'vue';
+import { ref, reactive, computed, onMounted, provide, nextTick } from 'vue';
 import { useRouter, useRoute } from 'vue-router';
 import { message } from 'ant-design-vue';
 import Step1BasicInfo from '@/components/course-edit/Step1BasicInfo.vue';
@@ -94,7 +96,8 @@ const route = useRoute();
 const isEdit = computed(() => !!route.params.id);
 const courseId = computed(() => route.params.id as string | undefined);
 
-const loading = ref(false);
+/** 编辑页：详情拉取完成后再挂载步骤表单，避免与 Spin 嵌套更新冲突 */
+const pageContentReady = ref(!isEdit.value);
 const saving = ref(false);
 const currentStep = ref(0);
 
@@ -137,7 +140,7 @@ const formData = reactive({
 const fetchCourseDetail = async () => {
   if (!isEdit.value) return;
 
-  loading.value = true;
+  pageContentReady.value = false;
   try {
     const res = await getCourse(courseId.value) as any;
     const course = res.data || res;
@@ -180,10 +183,12 @@ const fetchCourseDetail = async () => {
 
     // 环创建设
     formData.environmentConstruction = course.environmentConstruction || '';
+
+    await nextTick();
+    pageContentReady.value = true;
   } catch (error) {
     message.error('获取课程详情失败');
-  } finally {
-    loading.value = false;
+    pageContentReady.value = true;
   }
 };
 
@@ -486,4 +491,12 @@ provide('courseId', courseId);
   min-height: 400px;
   margin-top: 24px;
 }
+
+.course-edit-page-loading {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 420px;
+  margin-top: 16px;
+}
 </style>
diff --git a/reading-platform-frontend/src/views/admin/courses/components/Step2CourseIntro.vue b/reading-platform-frontend/src/views/admin/courses/components/Step2CourseIntro.vue
index 6dffe1a..ae84057 100644
--- a/reading-platform-frontend/src/views/admin/courses/components/Step2CourseIntro.vue
+++ b/reading-platform-frontend/src/views/admin/courses/components/Step2CourseIntro.vue
@@ -2,7 +2,6 @@
   <div class="step2-course-intro">
     <div class="intro-header">
       <span class="title">课程介绍</span>
-      <a-tag color="blue">已填写 {{ filledCount }} / 8</a-tag>
     </div>
 
     <a-tabs v-model:activeKey="activeTab" type="card">
@@ -176,20 +175,6 @@ watch(
 // 计算当前tab索引
 const currentTabIndex = computed(() => tabKeys.indexOf(activeTab.value));
 
-// 计算已填写的数量
-const filledCount = computed(() => {
-  let count = 0;
-  if (formData.introSummary) count++;
-  if (formData.introHighlights) count++;
-  if (formData.introGoals) count++;
-  if (formData.introSchedule) count++;
-  if (formData.introKeyPoints) count++;
-  if (formData.introMethods) count++;
-  if (formData.introEvaluation) count++;
-  if (formData.introNotes) count++;
-  return count;
-});
-
 // 上一个tab
 const prevTab = () => {
   const index = currentTabIndex.value;
@@ -221,7 +206,6 @@ const validate = () => {
 defineExpose({
   validate,
   formData,
-  filledCount,
 });
 </script>