fix：历史记录分割线展示时机&&重新点击时机

src/pages/ChatTactics/TacticsChat.tsx

@@ -889,9 +889,10 @@ export const TacticsChat: React.FC = () => {
                     : `${record.role}-${record.question || record.answerList?.[0]?.answer || ''}-${index}`
                   return (
                     <React.Fragment key={uniqueKey}>
-                      {historyDividerIndex !== null && index === historyDividerIndex && (
+                      {historyDividerIndex !== null && index + 1 === historyDividerIndex && (
                         <div className="flex items-center gap-[12px] my-[16px] text-[#B2B8C1] text-[12px]">
                           <div className="flex-1 h-px bg-[#E4E7EC]" />
+                          <span>以上为历史分析数据</span>
                           <span>{historyDividerTime || formatCurrentTime()}</span>
                           <div className="flex-1 h-px bg-[#E4E7EC]" />
                         </div>