fix:历史记录分割线

src/pages/ChatTactics/TacticsChat.tsx

@@ -500,9 +500,11 @@ export const TacticsChat: React.FC = () => {
       const res = await fetchTacticsQaRecordPage(conversationId)
       const res = await fetchTacticsQaRecordPage(conversationId)
       const qaRecords = res.data || []
       const qaRecords = res.data || []
       const hasHistoryFlag = qaRecords.length > 0
       const hasHistoryFlag = qaRecords.length > 0
+      const historyCount = qaRecords.length
       // 始终添加 system 角色作为欢迎语
       // 始终添加 system 角色作为欢迎语
       const messages = [{ role: 'system' } as ChatRecord, ...processApiResponse(qaRecords)]
       const messages = [{ role: 'system' } as ChatRecord, ...processApiResponse(qaRecords)]
-      setHistoryDividerIndex(hasHistoryFlag ? messages.length : null)
+      // 分割线按“历史记录条数 + 欢迎语”计算，避免缺失 question 的记录被漏算
+      setHistoryDividerIndex(hasHistoryFlag ? historyCount + 1 : null)
       setHistoryDividerTime(hasHistoryFlag ? formatCurrentTime() : null)
       setHistoryDividerTime(hasHistoryFlag ? formatCurrentTime() : null)
       // 处理历史记录中的参考文档标记
       // 处理历史记录中的参考文档标记
       const processedMessages = messages.map((item) => {
       const processedMessages = messages.map((item) => {