feat(auth): enterprise authentication and user management

frontend/athena/types/user.ts

@@ -1,5 +1,23 @@
+export type UserRole = "admin" | "manager" | "user";
+
 export interface User {
-    id: number;
-    username: string;
-    email: string;
-}
+  id: number;
+  first_name: string;
+  last_name: string;
+  username: string;
+  email: string;
+  role: UserRole;
+  is_active: boolean;
+  created_at: string;
+  updated_at: string;
+}
+
+export type UserPayload = {
+  first_name: string;
+  last_name: string;
+  username: string;
+  email: string;
+  role: UserRole;
+  is_active: boolean;
+  password?: string;
+};