diff --git a/frontend/app/web-gold/src/components/ChatMessageRenderer.vue b/frontend/app/web-gold/src/components/ChatMessageRenderer.vue
index 807cc60fb5..6b253382d4 100644
--- a/frontend/app/web-gold/src/components/ChatMessageRenderer.vue
+++ b/frontend/app/web-gold/src/components/ChatMessageRenderer.vue
@@ -3,7 +3,7 @@
 </template>
 
 <script setup>
-import { ref, watch, nextTick,onUnmounted } from 'vue'
+import { ref, watch, nextTick, onUnmounted, onMounted } from 'vue'
 import { renderMarkdown } from '@/utils/markdown'
 
 const props = defineProps({
@@ -23,9 +23,17 @@ const internalContent = ref('')
 const renderedContent = ref('')
 
 let debounceTimer = null
+// 页面可见性状态
+const isPageVisible = ref(true)
 
 // 仅在流式时计算并追加增量
 function appendStreamingDelta(newFullContent) {
+  // 页面不可见时，跳过更新避免重复片段
+  if (!isPageVisible.value) {
+    console.log('[ChatMessageRenderer] 页面不可见，跳过流式更新')
+    return
+  }
+
   const prev = internalContent.value
   if (newFullContent.startsWith(prev)) {
     // 正常情况：新内容包含旧内容 → 只追加差值
@@ -33,7 +41,7 @@ function appendStreamingDelta(newFullContent) {
     internalContent.value += delta
   } else {
     // 异常情况（如后端重发了不连续的内容），直接覆盖防止乱序
-    console.warn('[PromptDisplay] Streaming content out of order, forcing replace')
+    console.warn('[ChatMessageRenderer] Streaming content out of order, forcing replace')
     internalContent.value = newFullContent
   }
 }
@@ -80,9 +88,35 @@ watch(() => props.isStreaming, (newVal, oldVal) => {
   }
 })
 
-// 可选：组件卸载时清理定时器
+// 监听页面可见性变化，避免后台时累积重复片段
+function handleVisibilityChange() {
+  const wasVisible = isPageVisible.value
+  isPageVisible.value = !document.hidden
+
+  if (!wasVisible && isPageVisible.value) {
+    // 页面从不可见变为可见：立即同步最新内容
+    console.log('[ChatMessageRenderer] 页面重新可见，同步最新内容')
+    // 使用外部传入的最新content进行同步，而不是累积的增量
+    if (props.content) {
+      internalContent.value = props.content
+      updateRendered()
+    }
+  } else if (wasVisible && !isPageVisible.value) {
+    console.log('[ChatMessageRenderer] 页面进入后台')
+  }
+}
+
+onMounted(() => {
+  // 初始状态
+  handleVisibilityChange()
+  // 添加监听器
+  document.addEventListener('visibilitychange', handleVisibilityChange)
+})
+
 onUnmounted(() => {
   if (debounceTimer) clearTimeout(debounceTimer)
+  // 移除监听器
+  document.removeEventListener('visibilitychange', handleVisibilityChange)
 })
 </script>
 
diff --git a/frontend/app/web-gold/src/views/dh/Video.vue b/frontend/app/web-gold/src/views/dh/Video.vue
index 36ecaadc6c..0b541f79cf 100644
--- a/frontend/app/web-gold/src/views/dh/Video.vue
+++ b/frontend/app/web-gold/src/views/dh/Video.vue
@@ -514,7 +514,7 @@ const loadLastTask = async () => {
 
       // 如果任务是成功状态，显示结果
       if (task.status === 'SUCCESS' && task.resultVideoUrl) {
-        previewVideoUrl.value = task.resultVideoUrl
+        previewVideoUrl.value = task.videoUrl
         currentTaskStatus.value = 'SUCCESS'
         message.success('已自动加载最近一次任务结果')
       } else if (task.status === 'PROCESSING') {