feat: role CRUD page

frontend/app/routes/platform.navigation.tsx

@@ -1,8 +1,8 @@
-import { Home, Code, Calendar, Settings, Users, Folder } from "lucide-react";
+import { Home, Code, Calendar, Settings, Users, Folder, ShieldCheck } from "lucide-react";
 import type { ComponentType } from "react";
 
 export type ActivePage = "home" | "scripts" | "schedules" | "system";
-export type SubPage = "users" | "projects";
+export type SubPage = "users" | "projects" | "roles";
 
 export type NavigationItem = {
   /** 菜单显示名 */
@@ -33,6 +33,7 @@ export const navigation: NavigationItem[] = [
     children: [
       { label: "用户管理", icon: Users,  page: "system", sub: "users",    permission: "system:user:view" },
       { label: "项目管理", icon: Folder, page: "system", sub: "projects", permission: "system:project:view" },
+      { label: "角色管理", icon: ShieldCheck, page: "system", sub: "roles",   permission: "system:role:view" },
     ],
   },
 ];