style: format code and improve readability

frontend/src/app/model/auth/AuthResponse.ts

@@ -1,4 +1,4 @@
 export interface AuthResponse {
   token: string;
   tokenType: string;
-}
+}

frontend/src/app/model/auth/LoginRequest.ts

@@ -1,4 +1,4 @@
 export interface LoginRequest {
   usernameOrEmail: string;
   password: string;
-}
+}

frontend/src/app/model/auth/RegisterRequest.ts

@@ -2,4 +2,4 @@ export interface RegisterRequest {
   email: string;
   username: string;
   password: string;
-}
+}