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/03-业务模块/SSA-智能统计分析/README.md

@@ -1,8 +1,8 @@
 # SSA - 智能统计分析
 
-> **妯″潡浠ｅ彿锛?* SSA (Smart Statistical Analysis)  
-> **寮€鍙戠姸鎬侊細** 鈴?瑙勫垝涓? 
-> **鍟嗕笟浠峰€硷細** 猸愨瓙猸愨瓙猸?鍒氶渶  
+> **模块代号：** SSA (Smart Statistical Analysis)  
+> **开发状态：** ⏳ 规划中  
+> **商业价值：** ⭐⭐⭐⭐⭐ 刚需  
 > **独立性：** ⭐⭐⭐⭐  
 > **优先级：** P2
 
@@ -10,24 +10,24 @@
 
 ## 📋 模块概述
 
-鏅鸿兘缁熻<EFBFBD>鍒嗘瀽妯″潡鎻愪緵3鏉℃牳蹇冨垎鏋愯矾寰勶紝瀹炵幇浠庢暟鎹<EFBFBD>笂浼犲埌鎶ュ憡瀵煎嚭鐨勫畬鏁存祦绋嬨€?
+智能统计分析模块提供3条核心分析路径，实现从数据上传到报告导出的完整流程。
 
 ---
 
-## 馃幆 鏍稿績鍔熻兘锛?鏉¤矾寰勶級
+## 🎯 核心功能（3条路径）
 
 ### 1. 队列研究分析
 - 基线特征分析
-- 鐢熷瓨鍒嗘瀽锛圞aplan-Meier锛?
+- 生存分析（Kaplan-Meier）
 - Cox回归
 
 ### 2. 预测模型构建
-- 鍙橀噺绛涢€?
+- 变量筛选
 - 模型构建（Logistic回归、随机森林）
-- 妯″瀷楠岃瘉锛圧OC鏇茬嚎锛?
+- 模型验证（ROC曲线）
 
 ### 3. RCT研究分析
-- 闅忔満鍖栨<EFBFBD>鏌?
+- 随机化检查
 - 疗效分析
 - 亚组分析
 
@@ -37,10 +37,10 @@
 
 ```
 SSA-智能统计分析/
-  鈹溾攢鈹€ [AI瀵规帴] SSA蹇<EFBFBD>€熶笂涓嬫枃.md      # 鈴?寰呭垱寤?
+  ├── [AI对接] SSA快速上下文.md      # ⏳ 待创建
   ├── 00-项目概述/
-  鈹?  鈹斺攢鈹€ 01-浜у搧闇€姹傛枃妗?PRD).md    # 鈴?寰呭垱寤?
-  鈹斺攢鈹€ README.md                       # 鉁?褰撳墠鏂囨。
+  │   └── 01-产品需求文档(PRD).md    # ⏳ 待创建
+  └── README.md                       # ✅ 当前文档
 ```
 
 ---
@@ -48,15 +48,15 @@ SSA-智能统计分析/
 ## 🔗 依赖的通用能力
 
 - **文档处理引擎** - 数据导入
-- **ETL寮曟搸** - 鏁版嵁棰勫<EFBFBD>鐞?
+- **ETL引擎** - 数据预处理
 
 ---
 
-## 馃彈锔?鎶€鏈<E282AC>爤
+## 🏗️ 技术栈
 
 - **R语言** - 统计分析核心
 - **Plumber** - R暴露为API
-- **Node.js** - 绮樺悎灞?
+- **Node.js** - 粘合层
 
 ---