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/_templates/README.md

@@ -1,7 +1,7 @@
 # 文档模板
 
-> **鐩<EFBFBD>綍璇存槑锛?* 鏈<>洰褰曞寘鍚<E5AF98>悇绫绘枃妗ｇ殑鏍囧噯妯℃澘  
-> **浣跨敤鏂规硶锛?* 鍒涘缓鏂版枃妗ｆ椂锛屽<E9949B>鍒跺<E98D92>搴旀ā鏉匡紝濉<E7B49D>厖鍐呭<E98D90>
+> **目录说明：** 本目录包含各类文档的标准模板  
+> **使用方法：** 创建新文档时，复制对应模板，填充内容
 
 ---
 
@@ -9,28 +9,28 @@
 
 | 模板 | 说明 | 适用场景 |
 |------|------|---------|
-| **[AI瀵规帴] 蹇<>€熶笂涓嬫枃-妯℃澘.md** | 蹇<>€熶笂涓嬫枃鏂囨。妯℃澘 | 鍒涘缓鏂版ā鍧?鑳藉姏鏃?|
+| **[AI对接] 快速上下文-模板.md** | 快速上下文文档模板 | 创建新模块/能力时 |
 | **模块README-模板.md** | 模块README模板 | 创建新业务模块时 |
 
 ---
 
 ## 🎯 使用说明
 
-### 1. 鍒涘缓鏂颁笟鍔℃ā鍧?
+### 1. 创建新业务模块
 
-**姝ラ<EFBFBD>锛?*
+**步骤：**
 1. 复制 `模块README-模板.md` 到新模块目录
 2. 重命名为 `README.md`
-3. 濉<EFBFBD>厖鎵€鏈?`[鍗犱綅绗<E7B685>` 鍐呭<E98D90>
+3. 填充所有 `[占位符]` 内容
 4. 删除不需要的章节
 
 ### 2. 创建快速上下文文档
 
-**姝ラ<EFBFBD>锛?*
-1. 澶嶅埗 `[AI瀵规帴] 蹇<>€熶笂涓嬫枃-妯℃澘.md` 鍒板<E98D92>搴旂洰褰?
+**步骤：**
+1. 复制 `[AI对接] 快速上下文-模板.md` 到对应目录
 2. 重命名为 `[AI对接] [模块代号]快速上下文.md`
-3. 濉<EFBFBD>厖鎵€鏈夊唴瀹?
-4. 纭<EFBFBD>繚Token娑堣€楀湪鐩<EFBFBD>爣鑼冨洿鍐?
+3. 填充所有内容
+4. 确保Token消耗在目标范围内
 
 ---
 
@@ -40,18 +40,18 @@
 
 **L0级别（总体）：**
 - Token消耗：~800
-- 闃呰<EFBFBD>鏃堕棿锛?鍒嗛挓
-- 鍐呭<EFBFBD>锛氶」鐩<EFBFBD>叏璨屻€佸揩閫熻烦杞?
+- 阅读时间：2分钟
+- 内容：项目全貌、快速跳转
 
-**L1绾у埆锛堝眰绾э級锛?*
+**L1级别（层级）：**
 - Token消耗：~1500
-- 闃呰<EFBFBD>鏃堕棿锛?鍒嗛挓
-- 鍐呭<EFBFBD>锛氬眰绾ф<EFBFBD>瑙堛€佹ā鍧楁竻鍗?
+- 阅读时间：3分钟
+- 内容：层级概览、模块清单
 
-**L2绾у埆锛堟ā鍧楋級锛?*
+**L2级别（模块）：**
 - Token消耗：~2000
-- 闃呰<EFBFBD>鏃堕棿锛?鍒嗛挓
-- 鍐呭<EFBFBD>锛氭ā鍧楄<EFBFBD>鎯呫€佸紑鍙戞寚鍗?
+- 阅读时间：5分钟
+- 内容：模块详情、开发指南
 
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