refactor(asl): ASL frontend architecture refactoring with left navigation

- feat: Create ASLLayout component with 7-module left navigation
- feat: Implement Title Screening Settings page with optimized PICOS layout
- feat: Add placeholder pages for Workbench and Results
- fix: Fix nested routing structure for React Router v6
- fix: Resolve Spin component warning in MainLayout
- fix: Add QueryClientProvider to App.tsx
- style: Optimize PICOS form layout (P+I left, C+O+S right)
- style: Align Inclusion/Exclusion criteria side-by-side
- docs: Add architecture refactoring and routing fix reports

Ref: Week 2 Frontend Development
Scope: ASL module MVP - Title Abstract Screening

backend/src/index.ts

@@ -10,6 +10,7 @@ import knowledgeBaseRoutes from './legacy/routes/knowledgeBases.js';
 import { chatRoutes } from './legacy/routes/chatRoutes.js';
 import { batchRoutes } from './legacy/routes/batchRoutes.js';
 import reviewRoutes from './legacy/routes/reviewRoutes.js';
+import { aslRoutes } from './modules/asl/routes/index.js';
 import { registerHealthRoutes } from './common/health/index.js';
 import { logger } from './common/logging/index.js';
 import { registerTestRoutes } from './test-platform-api.js';
@@ -98,6 +99,12 @@ await fastify.register(batchRoutes, { prefix: '/api/v1' });
 // 注册稿件审查路由
 await fastify.register(reviewRoutes, { prefix: '/api/v1' });
 
+// ============================================
+// 【业务模块】ASL - AI智能文献筛选
+// ============================================
+await fastify.register(aslRoutes, { prefix: '/api/v1/asl' });
+logger.info('✅ ASL智能文献筛选路由已注册: /api/v1/asl');
+
 // 启动服务器
 const start = async () => {
   try {