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

backend/RESTART_SERVER_NOW.md

@@ -0,0 +1,44 @@
+# ⚠️ 重要：需要重启服务器
+
+## 修改内容
+- ✅ 添加XML格式支持
+- ✅ 更新消息处理逻辑
+- ✅ 添加XML内容解析器
+
+## 重启步骤
+
+1. **停止当前服务器**
+   ```
+   按 Ctrl+C（在运行服务器的终端中）
+   ```
+
+2. **重新启动服务器**
+   ```powershell
+   cd D:\MyCursor\AIclinicalresearch\backend
+   npm run dev
+   ```
+
+3. **确认日志**
+   应该看到：
+   ```
+   ✅ 微信服务号回调控制器已初始化（明文模式）
+   Registered route: GET /wechat/patient/callback-plain (明文模式)
+   Registered route: POST /wechat/patient/callback-plain (明文模式, XML)
+   ```
+
+## 微信公众平台配置
+
+| 配置项 | 值 |
+|--------|-----|
+| **URL** | `https://devlocal.xunzhengyixue.com/wechat/patient/callback-plain` |
+| **Token** | `IitPatientWechat2026JanToken` |
+| **消息加解密方式** | **明文模式** |
+| **数据格式** | **XML** ⚠️ 必须选择XML！ |
+
+---
+
+**重启服务器后，即可在微信公众平台提交配置！**
+
+
+
+