fix(character-comment): 캐릭터 상세 댓글 집계 및 최신 댓글 조회 기준 수정

- 최신 댓글 조회 시 원댓글(Parent=null)만 대상으로 조회하도록 Repository 메서드 및 Service 로직 변경

- 총 댓글 수를 "활성 원댓글 + 활성 부모를 가진 활성 답글"로 계산하여, 삭제된 원댓글의 답글은 집계에서 제외되도록 수정

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/comment/CharacterCommentRepository.kt

@@ -25,8 +25,14 @@ interface CharacterCommentRepository : JpaRepository<CharacterComment, Long> {
         pageable: Pageable
     ): List<CharacterComment>
 
-    fun findFirstByChatCharacter_IdAndIsActiveTrueOrderByCreatedAtDesc(chatCharacterId: Long): CharacterComment?
+    // 최신 원댓글만 조회
+    fun findFirstByChatCharacter_IdAndIsActiveTrueAndParentIsNullOrderByCreatedAtDesc(
+        chatCharacterId: Long
+    ): CharacterComment?
 
-    // 전체(상위+답글) 활성 댓글 총 개수
-    fun countByChatCharacter_IdAndIsActiveTrue(chatCharacterId: Long): Int
+    // 활성 원댓글 수
+    fun countByChatCharacter_IdAndIsActiveTrueAndParentIsNull(chatCharacterId: Long): Int
+
+    // 활성 부모를 가진 활성 답글 수 (부모가 null인 경우 제외됨)
+    fun countByChatCharacter_IdAndIsActiveTrueAndParent_IsActiveTrue(chatCharacterId: Long): Int
 }

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/comment/CharacterCommentService.kt

@@ -153,13 +153,20 @@ class CharacterCommentService(
 
     @Transactional(readOnly = true)
     fun getLatestComment(imageHost: String, characterId: Long): CharacterCommentResponse? {
-        val last = commentRepository.findFirstByChatCharacter_IdAndIsActiveTrueOrderByCreatedAtDesc(characterId)
-        return last?.let { toCommentResponse(imageHost, it) }
+        return commentRepository
+            .findFirstByChatCharacter_IdAndIsActiveTrueAndParentIsNullOrderByCreatedAtDesc(characterId)
+            ?.let { toCommentResponse(imageHost, it) }
     }
 
     @Transactional(readOnly = true)
     fun getTotalCommentCount(characterId: Long): Int {
-        return commentRepository.countByChatCharacter_IdAndIsActiveTrue(characterId)
+        // 활성 원댓글 수 + 활성 부모를 가진 활성 답글 수
+        val originalCount = commentRepository
+            .countByChatCharacter_IdAndIsActiveTrueAndParentIsNull(characterId)
+        val replyWithActiveParentCount = commentRepository
+            .countByChatCharacter_IdAndIsActiveTrueAndParent_IsActiveTrue(characterId)
+
+        return originalCount + replyWithActiveParentCount
     }
 
     @Transactional