feat(pkb): Complete PKB module frontend migration with V3 design

Summary:
- Implement PKB Dashboard and Workspace pages based on V3 prototype
- Add single-layer header with integrated Tab navigation
- Implement 3 work modes: Full Text, Deep Read, Batch Processing
- Integrate Ant Design X Chat component for AI conversations
- Create BatchModeComplete with template selection and document processing
- Add compact work mode selector with dropdown design

Backend:
- Migrate PKB controllers and services to /modules/pkb structure
- Register v2 API routes at /api/v2/pkb/knowledge
- Maintain dual API routes for backward compatibility

Technical details:
- Use Zustand for state management
- Handle SSE streaming responses for AI chat
- Support document selection for Deep Read mode
- Implement batch processing with progress tracking

Known issues:
- Batch processing API integration pending
- Knowledge assets page navigation needs optimization

Status: Frontend functional, pending refinement

docs/03-业务模块/IIT Manager Agent/02-技术设计/IIT Manager Agent 技术路径与架构设计.md

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 - v1.0 (2026-01-04): 初始版本，Phase 1.5完成
 
 
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docs/03-业务模块/IIT Manager Agent/04-开发计划/REDCap对接技术方案与实施指南.md

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docs/03-业务模块/IIT Manager Agent/04-开发计划/企业微信注册指南.md

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docs/03-业务模块/IIT Manager Agent/06-开发记录/2026-01-04-Dify知识库集成开发记录.md

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 **✅ 部署状态**: 已部署到开发环境
 
 
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docs/03-业务模块/IIT Manager Agent/06-开发记录/Day2-REDCap实时集成开发完成记录.md

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docs/03-业务模块/IIT Manager Agent/06-开发记录/Day3-企业微信集成与端到端测试完成记录.md

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docs/03-业务模块/IIT Manager Agent/06-开发记录/Day3-企业微信集成开发完成记录.md

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docs/03-业务模块/IIT Manager Agent/06-开发记录/Phase1.5-AI对话集成REDCap完成记录.md

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docs/03-业务模块/IIT Manager Agent/06-开发记录/V1.1更新完成报告.md

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docs/03-业务模块/IIT Manager Agent/07-技术债务/IIT Manager Agent 技术债务清单.md

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 - v1.0 (2026-01-04): 初始版本，Phase 1.5完成后整理
 
 
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