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/preload/index.d.ts

@@ -60,6 +60,7 @@ import type {
   VoiceRecognitionResult
 } from '../shared/voice-recognition'
 import type {
+  AiSearchCancelResult,
   AiSearchPipelineRequest,
   AiSearchPipelineResult,
   AiSearchProgressEvent
@@ -202,6 +203,7 @@ declare global {
       search: (keyword: string) => Promise<string | null>
       searchKnowledge: (request: KnowledgeSearchIpcRequest) => Promise<KnowledgeSearchIpcResult>
       runAiSearch: (request: AiSearchPipelineRequest) => Promise<AiSearchPipelineResult>
+      cancelAiSearch: (requestId: string) => Promise<AiSearchCancelResult>
       onAiSearchProgress: (callback: (progress: AiSearchProgressEvent) => void) => () => void
       getKnowledgeStatus: () => Promise<KnowledgeRuntimeStatus>
       startKnowledgeIndex: () => Promise<KnowledgeRuntimeStatus>