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

frontend-v2/src/modules/asl/pages/ScreeningResults.tsx

@@ -0,0 +1,44 @@
+/**
+ * 标题摘要初筛 - 初筛结果页面
+ * TODO: Week 2 Day 5 开发
+ * 
+ * 功能：
+ * - 统计卡片（总数/纳入/排除）
+ * - PRISMA排除原因统计
+ * - Tab切换（纳入/排除）
+ * - 结果表格
+ * - 批量操作
+ * - 导出Excel
+ */
+
+import { Card, Empty, Alert } from 'antd';
+
+const TitleScreeningResults = () => {
+  return (
+    <div className="p-6">
+      <div className="mb-6">
+        <h1 className="text-2xl font-bold mb-2">标题摘要初筛 - 结果</h1>
+        <p className="text-gray-500">
+          筛选结果统计、PRISMA流程图、批量操作和导出
+        </p>
+      </div>
+
+      <Card>
+        <Alert
+          message="功能开发中"
+          description="Week 2 Day 5 将实现统计卡片、结果表格、批量操作、Excel导出等功能"
+          type="info"
+          showIcon
+          className="mb-4"
+        />
+        <Empty
+          description="初筛结果页（开发中）"
+          image={Empty.PRESENTED_IMAGE_SIMPLE}
+        />
+      </Card>
+    </div>
+  );
+};
+
+export default TitleScreeningResults;
+