♻️ pr 리뷰 반영 - 비밀번호 확인 로직 메소드 분리

Author: sehee123

backend/src/main/java/io/f1/backend/domain/game/app/RoomService.java

@@ -131,8 +131,7 @@ public void enterRoom(RoomValidationRequest request) {
                 throw new CustomException(RoomErrorCode.ROOM_USER_LIMIT_REACHED);
             }
 
-            if (room.getRoomSetting().locked()
-                    && !room.getRoomSetting().password().equals(request.password())) {
+            if (room.isPasswordIncorrect(request.password())) {
                 throw new CustomException(RoomErrorCode.WRONG_PASSWORD);
             }
 

backend/src/main/java/io/f1/backend/domain/game/model/Room.java

@@ -195,4 +195,8 @@ public boolean isSameRoom(Long otherRoomId) {
     public boolean isPlayerInState(Long userId, ConnectionState state) {
         return getPlayerState(userId).equals(state);
     }
+
+    public boolean isPasswordIncorrect(String password) {
+        return roomSetting.locked() && !roomSetting.password().equals(password);
+    }
 }