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/04-数据ETL引擎/README.md

@@ -1,15 +1,15 @@
 # 数据ETL引擎
 
-> **能力定ä½<EFBFBD>ï¼?* 通用能力å±? 
-> **å¤<EFBFBD>用率：** 29% (2个模å<C2A1>—ä¾<C3A4>èµ?  
+> **能力定位：** 通用能力层  
+> **复用率：** 29% (2个模块依赖)  
 > **优先级：** P2  
-> **状æ€<EFBFBD>：** â<>?待实çŽ?
+> **状态：** ⏳ 待实现
 
 ---
 
 ## 📋 能力概述
 
-æ•°æ<EFBFBD>®ETL引擎负责ï¼?
+数据ETL引擎负责：
 - Excel多表JOIN
 - 数据清洗
 - 数据转换
@@ -19,9 +19,9 @@
 
 ## 📊 依赖模块
 
-**2个模å<EFBFBD>—ä¾<EFBFBD>赖（29%å¤<C3A5>用率）ï¼?*
+**2个模块依赖（29%复用率）：**
 1. **DC** - 数据清洗整理（核心依赖）
-2. **SSA** - 智能统计分æž<EFBFBD>（数æ<EFBFBD>®é¢„处ç<EFBFBD>†ï¼?
+2. **SSA** - 智能统计分析（数据预处理）
 
 ---
 
@@ -33,21 +33,21 @@
 - GROUP BY聚合
 
 ### 2. 数据清洗
-- 缺失值处ç<EFBFBD>?
-- é‡<EFBFBD>å¤<EFBFBD>值处ç<EFBFBD>?
-- 异常值检�
+- 缺失值处理
+- 重复值处理
+- 异常值检测
 
 ### 3. 数据转换
 - 类型转换
-- æ ¼å¼<EFBFBD>标准åŒ?
+- 格式标准化
 
 ---
 
-## ðŸ<EFBFBD>—ï¸?技术方æ¡?
+## 🏗️ 技术方案
 
 ### 云端版（最优）
 ```python
-# 基于Polars（性能æž<EFBFBD>高ï¼?
+# 基于Polars（性能极高）
 class ETLEngine:
     def read_excel(self, files: List[File]) -> List[DataFrame]
     def join(self, dfs: List[DataFrame], keys: List[str]) -> DataFrame
@@ -55,7 +55,7 @@ class ETLEngine:
     def export(self, df: DataFrame, format: str) -> bytes
 ```
 
-### å<EFBFBD>•æœºç‰ˆï¼ˆå…¼å®¹ï¼?
+### 单机版（兼容）
 ```python
 # 基于SQLite（内存友好）
 # 分块读取，数据库引擎处理JOIN