fix(v13): V13 审计 6 项修复 — TrajectoryRecorder注册 + industryStore接入 + 知识搜索 + webhook标注 + structured UI + persistent注释

FIX-01: TrajectoryRecorderMiddleware 注册到 create_middleware_chain() (@650优先级)
FIX-02: industryStore 接入 ButlerPanel 行业专长展示 + 自动拉取
FIX-03: 桌面端知识库搜索 saas-knowledge mixin + VikingPanel SaaS KB UI
FIX-04: webhook 迁移标注 deprecated + 添加 down migration 注释
FIX-05: Admin Knowledge 添加结构化数据 Tab (CRUD + 行浏览)
FIX-06: PersistentMemoryStore 精化 dead_code 标注 (完整迁移留后续)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/lib/saas-client.ts

@@ -70,6 +70,7 @@ export type {
   IndustryInfo,
   IndustryFullConfig,
   AccountIndustryItem,
+  KnowledgeSearchResult,
 } from './saas-types';
 
 export { SaaSApiError } from './saas-errors';
@@ -114,6 +115,7 @@ import { installPromptMethods } from './saas-prompt';
 import { installTelemetryMethods } from './saas-telemetry';
 import { installBillingMethods } from './saas-billing';
 import { installIndustryMethods } from './saas-industry';
+import { installKnowledgeMethods } from './saas-knowledge';
 export type { UsageIncrementResult } from './saas-billing';
 
 // Re-export billing types for convenience
@@ -448,6 +450,7 @@ installPromptMethods(SaaSClient);
 installTelemetryMethods(SaaSClient);
 installBillingMethods(SaaSClient);
 installIndustryMethods(SaaSClient);
+installKnowledgeMethods(SaaSClient);
 export { installBillingMethods };
 
 // === API Method Type Declarations ===
@@ -511,6 +514,9 @@ export interface SaaSClient {
   getIndustryFullConfig(industryId: string): Promise<import('./saas-types').IndustryFullConfig>;
   getMyIndustries(): Promise<import('./saas-types').AccountIndustryItem[]>;
   getAccountIndustries(accountId: string): Promise<import('./saas-types').AccountIndustryItem[]>;
+
+  // --- Knowledge (saas-knowledge.ts) ---
+  searchKnowledge(query: string, opts?: { category_id?: string; limit?: number }): Promise<import('./saas-types').KnowledgeSearchResult[]>;
 }
 
 // === Singleton ===