fix:修复手动暂停导致历史记录重复的bug

- 统一对话历史保存入口，移除手动暂停时的重复写入逻辑。手动暂停仅保留一条历史记录，并附带中止标记。

src/services/dialogService.ts

@@ -127,6 +127,7 @@ export class DialogSession {
   private toolContext: ToolExecutorContext;
   private accumulatedText = "";
   private isActive = false;
+  private wasAbortedByUser = false;
   private hasCompleted = false; // 标记是否已收到 complete 事件
   private segments: MessageSegment[] = [];
   private currentTextSegment: MessageSegment | null = null;
@@ -218,6 +219,10 @@ export class DialogSession {
     return this.isActive;
   }
 
+  get abortedByUser(): boolean {
+    return this.wasAbortedByUser;
+  }
+
   /**
    * 加载知识图谱数据
    * 从 .iccoder/knowledge.json 读取
@@ -1078,6 +1083,7 @@ export class DialogSession {
   abort(): void {
     // 先标记完成，防止 onClose 重复触发
     const wasActive = this.isActive;
+    this.wasAbortedByUser = true;
     this.hasCompleted = true;
     this.isActive = false;
 

src/utils/messageHandler.ts

@@ -362,7 +362,11 @@ async function handleUserMessageWithBackend(
               .map((s) => s.content)
               .join("\n");
 
-            await historyManager.addAiMessage(textContent, undefined, segments);
+            const finalText = currentSession?.abortedByUser
+              ? `${textContent}\n\n[对话已被用户中止]`
+              : textContent;
+
+            await historyManager.addAiMessage(finalText, undefined, segments);
             console.log("[MessageHandler] AI响应已保存到历史记录");
           } catch (error) {
             console.error("[MessageHandler] 保存AI响应历史失败:", error);
@@ -506,9 +510,11 @@ export async function handleUserAnswer(
  * 中止当前对话
  */
 export async function abortCurrentDialog(): Promise<void> {
-  if (currentSession) {
+  const session = currentSession;
+  if (false && session) {
+    // 历史保存统一走 onComplete，避免手动中止时重复写入
     // 保存当前已有的对话内容
-    const segments = currentSession.getSegments();
+    const segments = session!.getSegments();
     if (segments && segments.length > 0) {
       try {
         const historyManager = ChatHistoryManager.getInstance();