feat: 实现会话记忆同步和知识图谱恢复机制

- 添加 memory_compacted SSE 事件处理
- 添加 CompactedMemory/CompactedMessage 类型定义
- 添加 COMPACTION_SUMMARY 消息类型
- 实现压缩数据存储到 conversation.json
- 实现从 conversation.json 构建恢复数据
- 发送请求时附带 knowledgeData 用于恢复知识图谱

src/services/dialogService.ts

@@ -3,12 +3,15 @@
  * 整合 SSE 通信、工具执行、用户交互
  */
 import * as vscode from 'vscode';
+import * as fs from 'fs';
+import * as path from 'path';
 import { startStreamDialog, generateTaskId, SSEController, SSECallbacks } from './sseHandler';
 import { executeToolCall, createToolExecutorContext, ToolExecutorContext } from './toolExecutor';
 import { userInteractionManager } from './userInteraction';
 import { getConfig } from '../config/settings';
 import type { DialogRequest, ToolCallRequest, AskUserEvent, RunMode, ToolConfirmEvent, PlanConfirmEvent } from '../types/api';
 import { submitToolConfirm, submitAnswer } from './apiClient';
+import { ChatHistoryManager } from '../utils/chatHistoryManager';
 
 /**
  * 消息段落类型
@@ -152,6 +155,39 @@ export class DialogSession {
     return this.isActive;
   }
 
+  /**
+   * 加载知识图谱数据
+   * 从 .iccoder/knowledge.json 读取
+   */
+  private loadKnowledgeData(): string | null {
+    console.log('[DialogSession] loadKnowledgeData 开始执行');
+
+    const workspaceFolders = vscode.workspace.workspaceFolders;
+    if (!workspaceFolders || workspaceFolders.length === 0) {
+      console.log('[DialogSession] 没有工作区文件夹');
+      return null;
+    }
+
+    const workspacePath = workspaceFolders[0].uri.fsPath;
+    const knowledgePath = path.join(workspacePath, '.iccoder', 'knowledge.json');
+    console.log('[DialogSession] 知识图谱路径:', knowledgePath);
+
+    try {
+      const exists = fs.existsSync(knowledgePath);
+      console.log('[DialogSession] 文件存在:', exists);
+
+      if (exists) {
+        const content = fs.readFileSync(knowledgePath, 'utf-8');
+        console.log('[DialogSession] 加载知识图谱成功, 长度:', content.length);
+        return content;
+      }
+    } catch (error) {
+      console.warn('[DialogSession] 加载知识图谱失败:', error);
+    }
+
+    return null;
+  }
+
   /**
    * 获取工具操作描述（用于确认对话框）
    */
@@ -210,13 +246,29 @@ export class DialogSession {
     this.currentTextSegment = null;
 
     const config = getConfig();
+
+    // 获取压缩数据和新消息（用于后端重启后恢复）
+    const historyManager = ChatHistoryManager.getInstance();
+    const compactedData = await historyManager.loadCompactedData(this.taskId);
+    const newMessages = historyManager.getNewMessagesSinceCompaction();
+
+    // 加载知识图谱数据
+    const knowledgeData = this.loadKnowledgeData();
+    console.log('[DialogSession] knowledgeData 加载结果:', knowledgeData ? `${knowledgeData.length} 字符` : 'null');
+
     const request: DialogRequest = {
       taskId: this.taskId,
       message,
       userId: config.userId,
-      mode: mode || 'agent'
+      mode: mode || 'agent',
+      compactedData: compactedData || undefined,
+      newMessages: newMessages.length > 0 ? newMessages : undefined,
+      knowledgeData: knowledgeData || undefined
     };
 
+    // 追踪用户消息
+    historyManager.trackUserMessage(message);
+
     const sseCallbacks: SSECallbacks = {
       onTextDelta: (data) => {
         this.accumulatedText += data.text;
@@ -466,6 +518,12 @@ export class DialogSession {
         }
       },
 
+      onMemoryCompacted: async (data) => {
+        console.log('[DialogSession] onMemoryCompacted:', data.taskId);
+        // 保存压缩数据到本地
+        await historyManager.saveCompactedData(data.compactedData);
+      },
+
       onOpen: () => {
         console.log('[DialogSession] SSE 连接已建立');
       },