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/ST-统计分析工具/README.md

@@ -1,7 +1,7 @@
 # ST - 统计分析工具
 
-> **模å<EFBFBD>—代å<EFBFBD>·ï¼?* ST (Statistical Tools)  
-> **å¼€å<EFBFBD>‘状æ€<EFBFBD>：** â<>?规划ä¸? 
+> **模块代号：** ST (Statistical Tools)  
+> **开发状态：** ⏳ 规划中  
 > **商业价值：** ⭐⭐⭐⭐ 高频  
 > **独立性：** ⭐⭐⭐⭐  
 > **优先级：** P2
@@ -10,7 +10,7 @@
 
 ## 📋 模块概述
 
-统计分æž<EFBFBD>工具æ<EFBFBD><EFBFBD>ä¾›100+ç§<C3A7>è½»é‡<C3A9>化统计工具，满足å<C2B3>³æ—¶ã€<C3A3>å°<C3A5>型的分æž<C3A6>需求ã€?
+统计分析工具提供100+种轻量化统计工具，满足即时、小型的分析需求。
 
 ---
 
@@ -21,19 +21,19 @@
 **描述性统计：**
 - 均值、中位数、标准差
 - 频数分布
-- 交å<EFBFBD>‰è¡?
+- 交叉表
 
 **推断性统计：**
-- t检�
-- å<EFBFBD>¡æ–¹æ£€éª?
-- 方差分æž<EFBFBD>（ANOVAï¼?
+- t检验
+- 卡方检验
+- 方差分析（ANOVA）
 
 **相关与回归：**
 - 相关分析
-- 线性回�
+- 线性回归
 - Logistic回归
 
-**高级分æž<EFBFBD>ï¼?*
+**高级分析：**
 - ROC曲线
 - 生存分析
 - Meta分析
@@ -44,10 +44,10 @@
 
 ```
 ST-统计分析工具/
-  ├── [AI对接] ST快速上下文.md       # â<>?待创å»?
+  ├── [AI对接] ST快速上下文.md       # ⏳ 待创建
   ├── 00-项目概述/
-  â”?  └── 02-工具清å<E280A6>•ï¼?00+ï¼?md     # â<>?待创å»?
-  └── README.md                        # âœ?当å‰<C3A5>文档
+  │   └── 02-工具清单（100+）.md     # ⏳ 待创建
+  └── README.md                        # ✅ 当前文档
 ```
 
 ---