fix(chat-room): 비활성 채팅방 접근 방지를 위해 조회 로직 일원화

- 이 변경으로 비활성화된 채팅방에 대한 메시지 전송/조회/입장/리셋 등 모든 경로에서 안전하게 접근이 차단됩니다.

src/main/kotlin/kr/co/vividnext/sodalive/chat/room/repository/ChatRoomRepository.kt

@@ -62,4 +62,6 @@ interface ChatRoomRepository : JpaRepository<ChatRoom, Long> {
         @Param("member") member: Member,
         pageable: Pageable
     ): List<ChatRoomListQueryDto>
+
+    fun findByIdAndIsActiveTrue(id: Long): ChatRoom?
 }

src/main/kotlin/kr/co/vividnext/sodalive/chat/room/service/ChatRoomService.kt

@@ -69,9 +69,8 @@ class ChatRoomService(
 
     @Transactional
     fun purchaseMessage(member: Member, chatRoomId: Long, messageId: Long, container: String): ChatMessageItemDto {
-        val room = chatRoomRepository.findById(chatRoomId).orElseThrow {
+        val room = chatRoomRepository.findByIdAndIsActiveTrue(chatRoomId)
-            SodaException("채팅방을 찾을 수 없습니다.")
+            ?: throw SodaException("채팅방을 찾을 수 없습니다.")
-        }
         // 참여 여부 검증
         participantRepository.findByChatRoomAndMemberAndIsActiveTrue(room, member)
             ?: throw SodaException("잘못된 접근입니다")
@@ -288,9 +287,8 @@ class ChatRoomService(
 
     @Transactional(readOnly = true)
     fun isMyRoomSessionActive(member: Member, chatRoomId: Long): Boolean {
-        val room = chatRoomRepository.findById(chatRoomId).orElseThrow {
+        val room = chatRoomRepository.findByIdAndIsActiveTrue(chatRoomId)
-            SodaException("채팅방을 찾을 수 없습니다.")
+            ?: throw SodaException("채팅방을 찾을 수 없습니다.")
-        }
         val participant = participantRepository.findByChatRoomAndMemberAndIsActiveTrue(room, member)
         if (participant == null) {
             throw SodaException("잘못된 접근입니다")
@@ -300,9 +298,8 @@ class ChatRoomService(
 
     @Transactional
     fun enterChatRoom(member: Member, chatRoomId: Long, characterImageId: Long? = null): ChatRoomEnterResponse {
-        val room = chatRoomRepository.findById(chatRoomId).orElseThrow {
+        val room = chatRoomRepository.findByIdAndIsActiveTrue(chatRoomId)
-            SodaException("채팅방을 찾을 수 없습니다.")
+            ?: throw SodaException("채팅방을 찾을 수 없습니다.")
-        }
         // 참여 여부 검증
         participantRepository.findByChatRoomAndMemberAndIsActiveTrue(room, member)
             ?: throw SodaException("잘못된 접근입니다")
@@ -424,9 +421,8 @@ class ChatRoomService(
 
     @Transactional
     fun leaveChatRoom(member: Member, chatRoomId: Long, throwOnSessionEndFailure: Boolean = false) {
-        val room = chatRoomRepository.findById(chatRoomId).orElseThrow {
+        val room = chatRoomRepository.findByIdAndIsActiveTrue(chatRoomId)
-            SodaException("채팅방을 찾을 수 없습니다.")
+            ?: throw SodaException("채팅방을 찾을 수 없습니다.")
-        }
         val participant = participantRepository.findByChatRoomAndMemberAndIsActiveTrue(room, member)
             ?: throw SodaException("잘못된 접근입니다")
 
@@ -503,9 +499,8 @@ class ChatRoomService(
 
     @Transactional(readOnly = true)
     fun getChatMessages(member: Member, chatRoomId: Long, cursor: Long?, limit: Int = 20): ChatMessagesPageResponse {
-        val room = chatRoomRepository.findById(chatRoomId).orElseThrow {
+        val room = chatRoomRepository.findByIdAndIsActiveTrue(chatRoomId)
-            SodaException("채팅방을 찾을 수 없습니다.")
+            ?: throw SodaException("채팅방을 찾을 수 없습니다.")
-        }
         participantRepository.findByChatRoomAndMemberAndIsActiveTrue(room, member)
             ?: throw SodaException("잘못된 접근입니다")
 
@@ -539,9 +534,8 @@ class ChatRoomService(
     @Transactional
     fun sendMessage(member: Member, chatRoomId: Long, message: String): SendChatMessageResponse {
         // 1) 방 존재 확인
-        val room = chatRoomRepository.findById(chatRoomId).orElseThrow {
+        val room = chatRoomRepository.findByIdAndIsActiveTrue(chatRoomId)
-            SodaException("채팅방을 찾을 수 없습니다.")
+            ?: throw SodaException("채팅방을 찾을 수 없습니다.")
-        }
         // 2) 참여 여부 확인 (USER)
         val myParticipant = participantRepository.findByChatRoomAndMemberAndIsActiveTrue(room, member)
             ?: throw SodaException("잘못된 접근입니다")
@@ -786,9 +780,8 @@ class ChatRoomService(
     @Transactional
     fun resetChatRoom(member: Member, chatRoomId: Long, container: String): CreateChatRoomResponse {
         // 0) 방 존재 및 내 참여 여부 확인
-        val room = chatRoomRepository.findById(chatRoomId).orElseThrow {
+        val room = chatRoomRepository.findByIdAndIsActiveTrue(chatRoomId)
-            SodaException("채팅방을 찾을 수 없습니다.")
+            ?: throw SodaException("채팅방을 찾을 수 없습니다.")
-        }
         participantRepository.findByChatRoomAndMemberAndIsActiveTrue(room, member)
             ?: throw SodaException("잘못된 접근입니다")