feat(iit): V3.2 data consistency + project isolation + admin config redesign + Chinese labels

Summary:
- Refactor timeline API to read from qc_field_status (SSOT) instead of qc_logs
- Add field-issues paginated API with severity/dimension/recordId filters
- Add LEFT JOIN field_metadata + qc_event_status for Chinese display names
- Implement per-project ChatOrchestrator cache and SessionMemory isolation
- Redesign admin IIT config tabs (REDCap -> Fields -> KB -> Rules -> Members)
- Add AI-powered QC rule generation (D3 programmatic + D1/D5/D6 LLM-based)
- Add clickable warning/critical detail Modal in ReportsPage
- Auto-dispatch eQuery after batch QC via DailyQcOrchestrator
- Update module status documentation to v3.2

Backend changes:
- iitQcCockpitController: rewrite getTimeline from qc_field_status, add getFieldIssues
- iitQcCockpitRoutes: add field-issues route
- ChatOrchestrator: per-projectId cached instances
- SessionMemory: keyed by userId::projectId
- WechatCallbackController: resolve projectId from iitUserMapping
- iitRuleSuggestionService: dimension-based suggest + generateD3Rules
- iitBatchController: call DailyQcOrchestrator after batch QC

Frontend changes:
- AiStreamPage: adapt to new timeline structure with dimension tags
- ReportsPage: clickable stats cards with issue detail Modal
- IitProjectDetailPage: reorder tabs, add AI rule generation UI
- iitProjectApi: add TimelineIssue, FieldIssueItem types and APIs

Status: TypeScript compilation verified, no new lint errors
Made-with: Cursor

frontend-v2/src/App.tsx

@@ -8,7 +8,6 @@ import { RouteGuard } from './framework/router'
 import MainLayout from './framework/layout/MainLayout'
 import AdminLayout from './framework/layout/AdminLayout'
 import OrgLayout from './framework/layout/OrgLayout'
-import HomePage from './pages/HomePage'
 import LoginPage from './pages/LoginPage'
 import AdminDashboard from './pages/admin/AdminDashboard'
 import OrgDashboard from './pages/org/OrgDashboard'
@@ -80,8 +79,8 @@ function App() {
                 
                 {/* 业务应用端 /app/* */}
                 <Route path="/" element={<MainLayout />}>
-                  {/* 首页 */}
-                  <Route index element={<HomePage />} />
+                  {/* 首页重定向到 AI 问答 */}
+                  <Route index element={<Navigate to="/ai-qa" replace />} />
                   
                   {/* 动态加载模块路由 - 基于模块权限系统 ⭐ 2026-01-16 */}
                   {MODULES.filter(m => !m.isExternal).map(module => (