Role 타입 수정

@@ -29,13 +29,16 @@ export interface Vector {
 
 export type Role = "drawer" | "guesser" | "winner" | "spectator";
 
+export interface RoleData {
+  username: string;
+  nickname: string;
+  role: Role;
+}
+
 export interface RoundData {
   round: number;
   duration: number;
-  roles: {
-    username: string;
-    role: Role;
-  }[];
+  roles: RoleData[];
 };
 
 export interface BrushData {