feat(admin): Add user management and upgrade to module permission system

Features - User Management (Phase 4.1):
- Database: Add user_modules table for fine-grained module permissions
- Database: Add 4 user permissions (view/create/edit/delete) to role_permissions
- Backend: UserService (780 lines) - CRUD with tenant isolation
- Backend: UserController + UserRoutes (648 lines) - 13 API endpoints
- Backend: Batch import users from Excel
- Frontend: UserListPage (412 lines) - list/filter/search/pagination
- Frontend: UserFormPage (341 lines) - create/edit with module config
- Frontend: UserDetailPage (393 lines) - details/tenant/module management
- Frontend: 3 modal components (592 lines) - import/assign/configure
- API: GET/POST/PUT/DELETE /api/admin/users/* endpoints

Architecture Upgrade - Module Permission System:
- Backend: Add getUserModules() method in auth.service
- Backend: Login API returns modules array in user object
- Frontend: AuthContext adds hasModule() method
- Frontend: Navigation filters modules based on user.modules
- Frontend: RouteGuard checks requiredModule instead of requiredVersion
- Frontend: Remove deprecated version-based permission system
- UX: Only show accessible modules in navigation (clean UI)
- UX: Smart redirect after login (avoid 403 for regular users)

Fixes:
- Fix UTF-8 encoding corruption in ~100 docs files
- Fix pageSize type conversion in userService (String to Number)
- Fix authUser undefined error in TopNavigation
- Fix login redirect logic with role-based access check
- Update Git commit guidelines v1.2 with UTF-8 safety rules

Database Changes:
- CREATE TABLE user_modules (user_id, tenant_id, module_code, is_enabled)
- ADD UNIQUE CONSTRAINT (user_id, tenant_id, module_code)
- INSERT 4 permissions + role assignments
- UPDATE PUBLIC tenant with 8 module subscriptions

Technical:
- Backend: 5 new files (~2400 lines)
- Frontend: 10 new files (~2500 lines)
- Docs: 1 development record + 2 status updates + 1 guideline update
- Total: ~4900 lines of code

Status: User management 100% complete, module permission system operational

docs/02-通用能力层/03-RAG引擎/README.md

@@ -1,61 +1,61 @@
 # RAG引擎
 
-> **鑳藉姏瀹氫綅锛?* 閫氱敤鑳藉姏灞? 
-> **澶嶇敤鐜囷細** 43% (3涓<EFBFBD>ā鍧椾緷璧?  
+> **能力定位：** 通用能力层  
+> **复用率：** 43% (3个模块依赖)  
 > **优先级：** P1  
-> **鐘舵€侊細** 鉁?宸插疄鐜帮紙鍩轰簬Dify锛?
+> **状态：** ✅ 已实现（基于Dify）
 
 ---
 
 ## 📋 能力概述
 
-RAG寮曟搸璐熻矗锛?
-- 鍚戦噺鍖栧瓨鍌<EFBFBD>紙Embedding锛?
-- 璇<EFBFBD>箟妫€绱<EFBFBD>紙Semantic Search锛?
-- 妫€绱㈠<EFBFBD>寮虹敓鎴愶紙RAG锛?
-- Rerank閲嶆帓搴?
+RAG引擎负责：
+- 向量化存储（Embedding）
+- 语义检索（Semantic Search）
+- 检索增强生成（RAG）
+- Rerank重排序
 
 ---
 
 ## 📊 依赖模块
 
-**3涓<EFBFBD>ā鍧椾緷璧栵紙43%澶嶇敤鐜囷級锛?*
+**3个模块依赖（43%复用率）：**
 1. **AIA** - AI智能问答（@知识库问答）
 2. **ASL** - AI智能文献（文献内容检索）
-3. **PKB** - 涓<EFBFBD>汉鐭ヨ瘑搴擄紙RAG闂<EFBFBD>瓟锛?
+3. **PKB** - 个人知识库（RAG问答）
 
 ---
 
 ## 💡 核心功能
 
-### 1. 鍚戦噺鍖栧瓨鍌?
+### 1. 向量化存储
 - 基于Dify平台
-- Qdrant鍚戦噺鏁版嵁搴擄紙Dify鍐呯疆锛?
+- Qdrant向量数据库（Dify内置）
 
-### 2. 璇<EFBFBD>箟妫€绱?
-- Top-K妫€绱?
-- 鐩稿叧搴﹁瘎鍒?
-- 澶氱煡璇嗗簱鑱斿悎妫€绱?
+### 2. 语义检索
+- Top-K检索
+- 相关度评分
+- 多知识库联合检索
 
 ### 3. RAG问答
-- 妫€绱?+ 鐢熸垚
-- 鏅鸿兘寮曠敤绯荤粺锛?00%鍑嗙‘婧<E28098>簮锛?
+- 检索 + 生成
+- 智能引用系统（100%准确溯源）
 
 ---
 
-## 馃彈锔?鎶€鏈<E282AC>灦鏋?
+## 🏗️ 技术架构
 
-**鍩轰簬Dify骞冲彴锛?*
+**基于Dify平台：**
 ```typescript
 // DifyClient封装
 interface RAGEngine {
-  // 鍒涘缓鐭ヨ瘑搴?
+  // 创建知识库
   createDataset(name: string): Promise<string>;
   
   // 上传文档
   uploadDocument(datasetId: string, file: File): Promise<string>;
   
-  // 璇<EFBFBD>箟妫€绱?
+  // 语义检索
   search(datasetId: string, query: string, topK?: number): Promise<SearchResult[]>;
   
   // RAG问答
@@ -68,19 +68,19 @@ interface RAGEngine {
 ## 📈 优化成果
 
 **检索参数优化：**
-| 鎸囨爣 | 浼樺寲鍓?| 浼樺寲鍚?| 鎻愬崌 |
+| 指标 | 优化前 | 优化后 | 提升 |
 |------|--------|--------|------|
-| 妫€绱㈡暟閲?| 3 chunks | 15 chunks | 5鍊?|
-| Chunk澶у皬 | 500 tokens | 1500 tokens | 3鍊?|
-| 鎬昏<EFBFBD>鐩?| 1,500 tokens | 22,500 tokens | 15鍊?|
-| 瑕嗙洊鐜?| ~5% | ~40-50% | 8-10鍊?|
+| 检索数量 | 3 chunks | 15 chunks | 5倍 |
+| Chunk大小 | 500 tokens | 1500 tokens | 3倍 |
+| 总覆盖 | 1,500 tokens | 22,500 tokens | 15倍 |
+| 覆盖率 | ~5% | ~40-50% | 8-10倍 |
 
 ---
 
 ## 🔗 相关文档
 
 - [通用能力层总览](../README.md)
-- [Dify闆嗘垚鏂囨。](../../00-绯荤粺鎬讳綋璁捐<EFBFBD>/03-鏁版嵁搴撴灦鏋勮<E98F8B>鏄?md)
+- [Dify集成文档](../../00-系统总体设计/03-数据库架构说明.md)
 
 ---