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

frontend-v2/src/App.tsx

@@ -17,6 +17,10 @@ import PromptEditorPage from './pages/admin/PromptEditorPage'
 import TenantListPage from './pages/admin/tenants/TenantListPage'
 import TenantDetailPage from './pages/admin/tenants/TenantDetailPage'
 import { MODULES } from './framework/modules/moduleRegistry'
+// 用户管理页面
+import UserListPage from './modules/admin/pages/UserListPage'
+import UserFormPage from './modules/admin/pages/UserFormPage'
+import UserDetailPage from './modules/admin/pages/UserDetailPage'
 
 /**
  * 应用根组件
@@ -67,14 +71,14 @@ function App() {
                   {/* 首页 */}
                   <Route index element={<HomePage />} />
                   
-                  {/* 动态加载模块路由 */}
+                  {/* 动态加载模块路由 - 基于模块权限系统 ⭐ 2026-01-16 */}
                   {MODULES.map(module => (
                     <Route
                       key={module.id}
                       path={`${module.path}/*`}
                       element={
                         <RouteGuard
-                          requiredVersion={module.requiredVersion}
+                          requiredModule={module.moduleCode}
                           moduleName={module.name}
                         >
                           <module.component />
@@ -94,7 +98,12 @@ function App() {
                   {/* 租户管理 */}
                   <Route path="tenants" element={<TenantListPage />} />
                   <Route path="tenants/:id" element={<TenantDetailPage />} />
-                  <Route path="users" element={<div className="text-center py-20">🚧 用户管理页面开发中...</div>} />
+                  {/* 用户管理 */}
+                  <Route path="users" element={<UserListPage />} />
+                  <Route path="users/create" element={<UserFormPage mode="create" />} />
+                  <Route path="users/:id" element={<UserDetailPage />} />
+                  <Route path="users/:id/edit" element={<UserFormPage mode="edit" />} />
+                  {/* 系统配置 */}
                   <Route path="system" element={<div className="text-center py-20">🚧 系统配置页面开发中...</div>} />
                 </Route>