处理优化：

1、点击上一条对话按钮时如果需要切换背景视频让背景视频继续播放
2、在对话视频播放状态下点击自动按钮需要等待视频播放完成后自动处理

src/views/AIPage/aiGenerate/DialogContent.vue

@@ -155,7 +155,7 @@
 </template>
 
 <script setup>
-import { ref, computed, onMounted, onUnmounted, watch } from 'vue'
+import { ref, computed, onMounted, onUnmounted, watch, nextTick } from 'vue'
 import { useRouter } from 'vue-router'
 import { ArrowLeftBold, CaretLeft, CaretRight, Grid, VideoPlay } from '@element-plus/icons-vue'
 import VoiceInput from '@/components/ai/voice/VoiceInput_Api.vue'
@@ -527,6 +527,9 @@ const playSequence = () => {
         }
       }, 500)
     }
+  } else if (currentDialogue.value?.type === 'video') {
+    // 视频类型对话，不自动播放下一条，等待视频结束事件
+    return
   } else {
     // 播放当前对话语音，传递isAutoPlay参数
     playDialogueAudio(true)
@@ -584,15 +587,17 @@ const playPrevious = () => {
   }
 
   // 播放背景音
-  playBackgroundAudio()
-  // 播放当前对话语音（非诗词类型）
-  if (currentDialogue.value?.type !== 'poem') {
-    if (isPlaying.value) {
-      playDialogueAudio(true)
-    } else {
-      playDialogueAudio()
+  nextTick(() => {
+    playBackgroundAudio()
+    // 播放当前对话语音（非诗词类型）
+    if (currentDialogue.value?.type !== 'poem') {
+      if (isPlaying.value) {
+        playDialogueAudio(true)
+      } else {
+        playDialogueAudio()
+      }
     }
-  }
+  })
 }
 
 const playNext = (isAutoPlay = false) => {
@@ -659,39 +664,41 @@ const playNext = (isAutoPlay = false) => {
     showPoem.value = false
     currentPoemContent.value = ''
     // 播放背景音
-    playBackgroundAudio()
-    // 检查新环节的第一个对话是否为诗词类型
-    if (currentDialogue.value?.type === 'poem') {
-      // 显示诗词
-      showPoem.value = true
-      currentPoemContent.value = currentDialogue.value.content
-
-      // 检查是否有语音
-      if (currentDialogue.value?.voiceoverUrl) {
-        // 播放诗词语音
+    nextTick(() => {
+      playBackgroundAudio()
+      // 检查新环节的第一个对话是否为诗词类型
+      if (currentDialogue.value?.type === 'poem') {
+        // 显示诗词
+        showPoem.value = true
+        currentPoemContent.value = currentDialogue.value.content
+
+        // 检查是否有语音
+        if (currentDialogue.value?.voiceoverUrl) {
+          // 播放诗词语音
+          if (isPlaying.value) {
+            playDialogueAudio(true)
+          } else {
+            playDialogueAudio()
+          }
+        } else {
+          // 没有语音，直接切换到下一条对话
+          setTimeout(() => {
+            playNext(isAutoPlay)
+          }, 500)
+        }
+      } else if (currentDialogue.value?.type === 'video') {
+        // 视频类型对话，隐藏诗词
+        showPoem.value = false
+        currentPoemContent.value = ''
+      } else {
+        // 根据是否为自动播放状态决定如何播放语音
         if (isPlaying.value) {
           playDialogueAudio(true)
         } else {
           playDialogueAudio()
         }
-      } else {
-        // 没有语音，直接切换到下一条对话
-        setTimeout(() => {
-          playNext(isAutoPlay)
-        }, 500)
       }
-    } else if (currentDialogue.value?.type === 'video') {
-      // 视频类型对话，隐藏诗词
-      showPoem.value = false
-      currentPoemContent.value = ''
-    } else {
-      // 根据是否为自动播放状态决定如何播放语音
-      if (isPlaying.value) {
-        playDialogueAudio(true)
-      } else {
-        playDialogueAudio()
-      }
-    }
+    })
     return true
   }
   return false