feat(asl): Complete Tool 4 SR Chart Generator and Tool 5 Meta Analysis Engine

Tool 4 - SR Chart Generator:
- PRISMA 2020 flow diagram with Chinese/English toggle (SVG)
- Baseline characteristics table (Table 1)
- Dual data source: project pipeline API + Excel upload
- SVG/PNG export support
- Backend: ChartingService with Prisma aggregation
- Frontend: PrismaFlowDiagram, BaselineTable, DataSourceSelector

Tool 5 - Meta Analysis Engine:
- 3 data types: HR (metagen), dichotomous (metabin), continuous (metacont)
- Random and fixed effects models
- Multiple effect measures: HR / OR / RR
- Forest plot + funnel plot (base64 PNG from R)
- Heterogeneity statistics: I2, Q, p-value, Tau2
- Data input via Excel upload or project pipeline
- R Docker image updated with meta package (13 tools total)
- E2E test: 36/36 passed
- Key fix: exp() back-transformation for log-scale ratio measures

Also includes:
- IIT CRA Agent V3.0 routing and AI chat page integration
- Updated ASL module status guide (v2.3)
- Updated system status guide (v6.3)
- Updated R statistics engine guide (v1.4)

Tested: Frontend renders correctly, backend APIs functional, E2E tests passed
Made-with: Cursor

frontend-v2/src/modules/iit/index.tsx

@@ -6,28 +6,20 @@ const DashboardPage = React.lazy(() => import('./pages/DashboardPage'));
 const AiStreamPage = React.lazy(() => import('./pages/AiStreamPage'));
 const EQueryPage = React.lazy(() => import('./pages/EQueryPage'));
 const ReportsPage = React.lazy(() => import('./pages/ReportsPage'));
-
-const VariableListPage = React.lazy(() => import('./pages/VariableListPage'));
-
-const ConfigProjectListPage = React.lazy(() => import('./config/ProjectListPage'));
-const ConfigProjectDetailPage = React.lazy(() => import('./config/ProjectDetailPage'));
+const AiChatPage = React.lazy(() => import('./pages/AiChatPage'));
 
 const IitModule: React.FC = () => {
   return (
     <Routes>
-      {/* CRA 质控平台主界面 */}
+      {/* CRA 质控平台 — 终端用户日常使用界面 */}
       <Route element={<IitLayout />}>
         <Route index element={<Navigate to="dashboard" replace />} />
         <Route path="dashboard" element={<DashboardPage />} />
         <Route path="stream" element={<AiStreamPage />} />
         <Route path="equery" element={<EQueryPage />} />
         <Route path="reports" element={<ReportsPage />} />
-        <Route path="variables" element={<VariableListPage />} />
+        <Route path="chat" element={<AiChatPage />} />
       </Route>
-
-      {/* 项目配置界面（独立布局，不使用 CRA 质控平台导航） */}
-      <Route path="config" element={<ConfigProjectListPage />} />
-      <Route path="config/:id" element={<ConfigProjectDetailPage />} />
     </Routes>
   );
 };