feat(rvw): Complete Phase 4-5 - Bug fixes and Word export

Summary:
- Fix methodology score display issue in task list (show score instead of 'warn')
- Add methodology_score field to database schema
- Fix report display when only methodology agent is selected
- Implement Word document export using docx library
- Update documentation to v3.0/v3.1

Backend changes:
- Add methodologyScore to Prisma schema and TaskSummary type
- Update reviewWorker to save methodologyScore
- Update getTaskList to return methodologyScore

Frontend changes:
- Install docx and file-saver libraries
- Implement handleExportReport with Word generation
- Fix activeTab auto-selection based on available data
- Add proper imports for docx components

Documentation:
- Update RVW module status to 90% (Phase 1-5 complete)
- Update system status document to v3.0

Tested: All review workflows verified, Word export functional

frontend-v2/src/modules/rvw/components/index.ts

@@ -0,0 +1,15 @@
+/**
+ * RVW组件导出
+ */
+export { default as Sidebar } from './Sidebar';
+export { default as Header } from './Header';
+export { default as FilterChips } from './FilterChips';
+export { default as TaskTable } from './TaskTable';
+export { default as BatchToolbar } from './BatchToolbar';
+export { default as AgentModal } from './AgentModal';
+export { default as ScoreRing } from './ScoreRing';
+export { default as EditorialReport } from './EditorialReport';
+export { default as MethodologyReport } from './MethodologyReport';
+export { default as ReportDetail } from './ReportDetail';
+export { default as TaskDetail } from './TaskDetail';
+