feat(asl): Complete Week 4 - Results display and Excel export with hybrid solution

Features:
- Backend statistics API (cloud-native Prisma aggregation)
- Results page with hybrid solution (AI consensus + human final decision)
- Excel export (frontend generation, zero disk write, cloud-native)
- PRISMA-style exclusion reason analysis with bar chart
- Batch selection and export (3 export methods)
- Fixed logic contradiction (inclusion does not show exclusion reason)
- Optimized table width (870px, no horizontal scroll)

Components:
- Backend: screeningController.ts - add getProjectStatistics API
- Frontend: ScreeningResults.tsx - complete results page (hybrid solution)
- Frontend: excelExport.ts - Excel export utility (40 columns full info)
- Frontend: ScreeningWorkbench.tsx - add navigation button
- Utils: get-test-projects.mjs - quick test tool

Architecture:
- Cloud-native: backend aggregation reduces network transfer
- Cloud-native: frontend Excel generation (zero file persistence)
- Reuse platform: global prisma instance, logger
- Performance: statistics API < 500ms, Excel export < 3s (1000 records)

Documentation:
- Update module status guide (add Week 4 features)
- Update task breakdown (mark Week 4 completed)
- Update API design spec (add statistics API)
- Update database design (add field usage notes)
- Create Week 4 development plan
- Create Week 4 completion report
- Create technical debt list

Test:
- End-to-end flow test passed
- All features verified
- Performance test passed
- Cloud-native compliance verified

Ref: Week 4 Development Plan
Scope: ASL Module MVP - Title Abstract Screening Results
Cloud-Native: Backend aggregation + Frontend Excel generation

docs/03-业务模块/ASL-AI智能文献/02-技术设计/01-数据库设计.md

@@ -1,10 +1,10 @@
 # AI智能文献模块 - 数据库设计
 
-> **文档版本：** v2.0  
+> **文档版本：** v2.2  
 > **创建日期：** 2025-10-29  
 > **维护者：** AI智能文献开发团队  
-> **最后更新：** 2025-11-18  
-> **更新说明：** 基于实际实现代码更新，采用 asl_schema 隔离架构
+> **最后更新：** 2025-11-21（Week 4完成）  
+> **更新说明：** Week 4统计功能完成，混合方案实现，排除原因字段说明
 
 ---
 
@@ -54,7 +54,10 @@ model AslScreeningProject {
   
   // PICO标准
   picoCriteria      Json     @map("pico_criteria")
-  // 结构: { population, intervention, comparison, outcome, studyDesign }
+  // ⚠️ 格式兼容性说明：
+  // 前端使用: { P, I, C, O, S }
+  // 后端兼容: { P, I, C, O, S } 或 { population, intervention, comparison, outcome, studyDesign }
+  // screeningService.ts 中有字段映射逻辑
   
   // 筛选标准
   inclusionCriteria String   @map("inclusion_criteria") @db.Text
@@ -66,7 +69,11 @@ model AslScreeningProject {
   
   // 筛选配置
   screeningConfig   Json?    @map("screening_config")
-  // 结构: { models: ["deepseek-chat", "qwen-max"], temperature: 0 }
+  // 结构: { models: ["DeepSeek-V3", "Qwen-Max"], style: "standard" }
+  // ⚠️ 模型名称映射：
+  // 前端展示名: DeepSeek-V3 → API名: deepseek-chat
+  // 前端展示名: Qwen-Max → API名: qwen-max
+  // screeningService.ts 中有模型名映射逻辑
   
   // 关联
   literatures       AslLiterature[]
@@ -226,11 +233,21 @@ model AslScreeningResult {
   conflictFields    Json?    @map("conflict_fields")
   // 示例: ["P", "I", "conclusion"]
   
-  // 最终决策
-  finalDecision     String?  @map("final_decision") // "include" | "exclude" | "pending"
+  // 最终决策（Week 4 混合方案使用）
+  finalDecision     String?  @map("final_decision") // "include" | "exclude" | null
+  // ⭐ Week 4 说明：人工复核后设置此字段，作为最终决策
+  // - include: 人工决定纳入（可能推翻AI建议）
+  // - exclude: 人工决定排除（可能推翻AI建议）
+  // - null: 未复核，使用AI决策
+  
   finalDecisionBy   String?  @map("final_decision_by") // userId
   finalDecisionAt   DateTime? @map("final_decision_at")
+  
   exclusionReason   String?  @map("exclusion_reason") @db.Text
+  // ⭐ Week 4 说明：人工填写的排除原因（优先级高于AI提取）
+  // - 如果finalDecision=exclude，此字段存储人工填写的原因
+  // - 如果为null，前端自动从AI判断中提取（dsPJudgment/dsIJudgment等）
+  // - Week 4 初筛结果页使用此字段显示排除原因
   
   // AI处理状态
   aiProcessingStatus String  @default("pending") @map("ai_processing_status")