【需求 25171】fix: 问吧详情页翻页后自动滚动回回答列表顶部

回答列表翻页之前没有滚动，翻到后面几页时看不到"N 个回答"这个列表头部，
体验和其他分页列表（比如首页问吧列表）不一致。参考同页面回答置顶后的
滚动逻辑，翻页后统一滚回列表控制栏顶部。

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/views/questionDetail/index.vue

@@ -245,6 +245,7 @@
 
       <!-- 2. 列表控制栏 -->
       <div
+        ref="answerListRef"
         class="bg-white rounded-lg border-b border-slate-100 p-6 flex justify-between items-center shadow-sm"
       >
         <h3 class="font-bold text-slate-800 text-base">{{ total }} 个回答</h3>
@@ -445,7 +446,7 @@
           :total="total"
           layout="prev, pager, next,total"
           small
-          @current-change="goToPage"
+          @current-change="handlePageChange"
         />
       </div>
     </div>
@@ -497,6 +498,7 @@ const router = useRouter()
 const questionId = Number(route.params.id)
 const commentRefList = ref<InstanceType<typeof Comment>[]>([])
 const answerRefList = ref<HTMLElement[]>([])
+const answerListRef = useTemplateRef<HTMLElement>('answerListRef')
 const questionDetail = ref<ArticleItemDto>({} as ArticleItemDto)
 const commentDialogRef = useTemplateRef<typeof CommentDialog>('commentDialogRef')
 const sendMessageDialogRef = useTemplateRef<InstanceType<typeof SendMessageDialog> | null>(
@@ -506,6 +508,8 @@ const { showPreview, currentPreviewIndex, srcList, vImagePreview } = useImagePre
 
 // 回滚到子评论框
 const { handleBackTop: handleBackTopChildren } = useScrollTop(answerRefList)
+// 翻页时滚回到回答列表顶部
+const { handleBackTop: handleBackTopAnswerList } = useScrollTop(answerListRef)
 const loading = computed(() => !questionDetail.value.title)
 const isSelfAnswer = (answer: CommentItemDto) =>
   String(answer.userId || '') === String(userInfo.value.userId || '')
@@ -571,6 +575,11 @@ const changeSortType = (type: CommentSortTypeEnum) => {
   refresh()
 }
 
+const handlePageChange = async (page: number) => {
+  await goToPage(page)
+  handleBackTopAnswerList()
+}
+
 const handleLikeArticle = async () => {
   await addOrCanceArticlelLike(questionId)
   questionDetail.value.hasPraised = !questionDetail.value.hasPraised