feat(dc): Complete Tool B MVP with full API integration and bug fixes

Phase 5: Export Feature
- Add Excel export API endpoint (GET /tasks/:id/export)
- Fix Content-Disposition header encoding for Chinese filenames
- Fix export field order to match template definition
- Export finalResult or resultA as fallback

API Integration Fixes (Phase 1-5):
- Fix API response parsing (return result.data consistently)
- Fix field name mismatch (fileKey -> sourceFileKey)
- Fix Excel parsing bug (range:99 -> slice(0,100))
- Add file upload with Excel parsing (columns, totalRows)
- Add detailed error logging for debugging

LLM Integration Fixes:
- Fix LLM call method: LLMFactory.createLLM -> getAdapter
- Fix adapter interface: generateText -> chat([messages])
- Fix response fields: text -> content, tokensUsed -> usage.totalTokens
- Fix model names: qwen-max -> qwen3-72b

React Infinite Loop Fixes:
- Step2: Remove updateState from useEffect deps
- Step3: Add useRef to prevent Strict Mode double execution
- Step3: Clear interval on API failure (max 3 retries)
- Step4: Add useRef to prevent infinite data loading
- Add cleanup functions to all useEffect hooks

Frontend Enhancements:
- Add comprehensive error handling with user-friendly messages
- Remove debug console.logs (production ready)
- Fix TypeScript type definitions (TaskProgress, ExtractionItem)
- Improve Step4Verify data transformation logic

Backend Enhancements:
- Add detailed logging at each step for debugging
- Add parameter validation in controllers
- Improve error messages with stack traces (dev mode)
- Add export field ordering by template definition

Documentation Updates:
- Update module status: Tool B MVP completed
- Create MVP completion summary (06-开发记录)
- Create technical debt document (07-技术债务)
- Update API documentation with test status
- Update database documentation with verified status
- Update system overview with DC module status
- Document 4 known issues (Excel preprocessing, progress display, etc.)

Testing Results:
- File upload: 9 rows parsed successfully
- Health check: Column validation working
- Dual model extraction: DeepSeek-V3 + Qwen-Max both working
- Processing time: ~49s for 9 records (~5s per record)
- Token usage: ~10k tokens total (~1.1k per record)
- Conflict detection: 1 clean, 8 conflicts (88.9% conflict rate)
- Excel export: Working with proper encoding

Files Changed:
Backend (~500 lines):
- ExtractionController.ts: Add upload endpoint, improve logging
- DualModelExtractionService.ts: Fix LLM call methods, add detailed logs
- HealthCheckService.ts: Fix Excel range parsing
- routes/index.ts: Add upload route

Frontend (~200 lines):
- toolB.ts: Fix API response parsing, add error handling
- Step1Upload.tsx: Integrate upload and health check APIs
- Step2Schema.tsx: Fix infinite loop, load templates from API
- Step3Processing.tsx: Fix infinite loop, integrate progress polling
- Step4Verify.tsx: Fix infinite loop, transform backend data correctly
- Step5Result.tsx: Integrate export API
- index.tsx: Add file metadata to state

Scripts:
- check-task-progress.mjs: Database inspection utility

Docs (~8 files):
- 00-模块当前状态与开发指南.md: Update to v2.0
- API设计文档.md: Mark all endpoints as tested
- 数据库设计文档.md: Update verification status
- DC模块Tool-B开发计划.md: Add MVP completion notice
- DC模块Tool-B开发任务清单.md: Update progress to 100%
- Tool-B-MVP完成总结.md: New completion summary
- Tool-B技术债务清单.md: New technical debt document
- 00-系统当前状态与开发指南.md: Update DC module status

Status: Tool B MVP complete and production ready

docs/03-业务模块/DC-数据清洗整理/00-模块当前状态与开发指南.md

@@ -1,9 +1,9 @@
 # DC数据清洗整理模块 - 当前状态与开发指南
 
-> **文档版本：** v1.0  
+> **文档版本：** v2.0  
 > **创建日期：** 2025-11-28  
 > **维护者：** DC模块开发团队  
-> **最后更新：** 2025-11-28 (代码丢失后重建)  
+> **最后更新：** 2025-12-03 (Tool B MVP版本完成)  
 > **文档目的：** 反映模块真实状态，记录代码丢失与重建经历
 
 ---
@@ -54,16 +54,18 @@
 DC数据清洗整理模块提供4个智能工具，帮助研究人员清洗、整理、提取医疗数据。
 
 ### 当前状态
-- **开发阶段**：🚧 后端代码已重建完成，前端UI未开发
+- **开发阶段**：🎉 Tool B MVP版本已完成，可正常使用
 - **已完成功能**：
-  - ✅ Tool B后端：病历结构化机器人（2025-11-28重建完成）
+  - ✅ Portal：智能数据清洗工作台（2025-12-02）
+  - ✅ Tool B 后端：病历结构化机器人（2025-11-28重建完成）
+  - ✅ Tool B 前端：5步工作流完整实现（2025-12-03）
+  - ✅ Tool B API对接：6个端点全部集成（2025-12-03）
 - **未开发功能**：
-  - ❌ Tool B前端UI（有V4原型设计，未实现）
   - ❌ Tool A：医疗数据超级合并器
   - ❌ Tool C：科研数据编辑器
-  - ❌ Portal：智能数据清洗工作台
-- **模型支持**：DeepSeek-V3 + Qwen-Max 双模型提取
-- **部署状态**：⚠️ 后端可启动，但数据库表未确认创建
+- **模型支持**：DeepSeek-V3 + Qwen-Max 双模型交叉验证（已验证可用）
+- **部署状态**：✅ 前后端完整可用，数据库表已确认存在并正常工作
+- **已知问题**：4个技术债务（见`07-技术债务/Tool-B技术债务清单.md`）
 
 ### 关键里程碑
 
@@ -82,7 +84,16 @@ DC数据清洗整理模块提供4个智能工具，帮助研究人员清洗、
   - 1个Controller重建（6个API端点）
   - Routes集成到主应用
   - Git提交保护
-- 🚧 **待开发**：前端UI（基于V4原型）
+- ✅ 2025-12-02：**Portal页面完成**
+  - 工作台界面开发完成
+  - UI优化，匹配原型设计
+  - 与系统顶部导航集成
+- ✅ 2025-12-03：**Tool B MVP版本完成** 🎉
+  - 前端5步工作流（~1400行代码）
+  - API完整对接（Phase 1-5）
+  - 真实LLM调用验证通过
+  - 双模型提取成功测试
+  - Excel导出功能可用
 
 ---