feat: add user management features including user creation, editing, and role management

- Implemented user API functions for fetching, creating, updating, and managing users.
- Created a UsersPage component for displaying and managing users with search and pagination.
- Added types for user data and mutation payloads.
- Introduced a LegacyRouteRedirect component for handling legacy routes.
- Defined settings-related types for better type safety in settings management.

atsf_server/web/app/(dashboard)/page.tsx

@@ -6,7 +6,7 @@ export default function DashboardPage() {
     <div className='space-y-6'>
       <PageHeader
         title='ATSFlare 管理端迁移进度'
-        description='新版前端已完成认证与框架层迁移，当前进入阶段 3，优先接入核心业务模块。'
+        description='新版前端已完成认证、核心链路与阶段 4 边缘模块迁移，当前可继续推进联调与回归。'
       />
       <DashboardOverview />
     </div>