feat: 优化问问微信检索性能与分析交互

- 补充 Worker、WCDB、sender、IPC、序列化时间账
- 增加 Agent 增量覆盖统计和重复检索停止条件
- 补充性能与交互回归测试

src/main/index.ts

@@ -942,6 +942,10 @@ app.whenReady().then(async () => {
       if (!event.sender.isDestroyed()) event.sender.send('ai-search:progress', progress)
     })
   })
+  ipcMain.handle('ai-search:cancel', (_, requestId: string) => {
+    if (!aiSearchPipelineService) throw new Error('本地搜索服务尚未初始化')
+    return aiSearchPipelineService.cancel(requestId)
+  })
   voiceBatchService = new VoiceBatchService(voiceRecognition)
   voiceBatchService.onProgress((progress) => {
     for (const window of BrowserWindow.getAllWindows()) {