feat(character): 홈의 최근 목록을 채팅방 기반으로 노출

- ChatRoomService.listMyChatRooms 사용, 최근 순 최대 10개 노출
- 방 title/imageUrl을 그대로 사용해 UI/데이터 일관성 유지
- 비로그인 사용자는 빈 배열 반환

refactor(dto): RecentCharacter.characterId → roomId로 변경

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/controller/ChatCharacterController.kt

@@ -11,6 +11,7 @@ import kr.co.vividnext.sodalive.chat.character.dto.OtherCharacter
 import kr.co.vividnext.sodalive.chat.character.dto.RecentCharacter
 import kr.co.vividnext.sodalive.chat.character.service.ChatCharacterBannerService
 import kr.co.vividnext.sodalive.chat.character.service.ChatCharacterService
+import kr.co.vividnext.sodalive.chat.room.service.ChatRoomService
 import kr.co.vividnext.sodalive.common.ApiResponse
 import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.member.Member
@@ -27,6 +28,7 @@ import org.springframework.web.bind.annotation.RestController
 class ChatCharacterController(
     private val service: ChatCharacterService,
     private val bannerService: ChatCharacterBannerService,
+    private val chatRoomService: ChatRoomService,
 
     @Value("\${cloud.aws.cloud-front.host}")
     private val imageHost: String
@@ -45,15 +47,19 @@ class ChatCharacterController(
                 )
             }
 
-        // 최근 대화한 캐릭터 조회 (회원별 최근 순으로 최대 10개)
-        val recentCharacters = service.getRecentCharacters(member, 10)
-            .map {
+        // 최근 대화한 캐릭터(채팅방) 조회 (회원별 최근 순으로 최대 10개)
+        val recentCharacters = if (member == null || member.auth == null) {
+            emptyList()
+        } else {
+            chatRoomService.listMyChatRooms(member, 0, 10)
+                .map { room ->
                     RecentCharacter(
-                    characterId = it.id!!,
-                    name = it.name,
-                    imageUrl = "$imageHost/${it.imagePath ?: "profile/default-profile.png"}"
+                        roomId = room.chatRoomId,
+                        name = room.title,
+                        imageUrl = room.imageUrl
                     )
                 }
+        }
 
         // 인기 캐릭터 조회 (현재는 빈 리스트)
         val popularCharacters = service.getPopularCharacters()

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/dto/CharacterHomeResponse.kt

@@ -22,7 +22,7 @@ data class Character(
 )
 
 data class RecentCharacter(
-    val characterId: Long,
+    val roomId: Long,
     val name: String,
     val imageUrl: String
 )

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/repository/ChatCharacterRepository.kt

@@ -1,7 +1,6 @@
 package kr.co.vividnext.sodalive.chat.character.repository
 
 import kr.co.vividnext.sodalive.chat.character.ChatCharacter
-import kr.co.vividnext.sodalive.member.Member
 import org.springframework.data.domain.Page
 import org.springframework.data.domain.Pageable
 import org.springframework.data.jpa.repository.JpaRepository
@@ -42,31 +41,6 @@ interface ChatCharacterRepository : JpaRepository<ChatCharacter, Long> {
         pageable: Pageable
     ): Page<ChatCharacter>
 
-    /**
-     * 멤버가 최근에 대화한 캐릭터 목록을 반환 (최신 메시지 시간 기준 내림차순)
-     */
-    @Query(
-        value = """
-            SELECT c FROM ChatRoom r
-            JOIN r.participants pu
-            JOIN r.participants pc
-            JOIN pc.character c
-            LEFT JOIN r.messages m
-            WHERE pu.member = :member
-              AND pu.participantType = kr.co.vividnext.sodalive.chat.room.ParticipantType.USER
-              AND pu.isActive = true
-              AND pc.participantType = kr.co.vividnext.sodalive.chat.room.ParticipantType.CHARACTER
-              AND pc.isActive = true
-              AND r.isActive = true
-            GROUP BY c.id
-            ORDER BY MAX(COALESCE(m.createdAt, r.createdAt)) DESC
-        """
-    )
-    fun findRecentCharactersByMember(
-        @Param("member") member: Member,
-        pageable: Pageable
-    ): List<ChatCharacter>
-
     /**
      * 특정 캐릭터와 태그를 공유하는 다른 캐릭터를 무작위로 조회 (현재 캐릭터 제외)
      */

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/service/ChatCharacterService.kt

@@ -13,7 +13,6 @@ import kr.co.vividnext.sodalive.chat.character.repository.ChatCharacterHobbyRepo
 import kr.co.vividnext.sodalive.chat.character.repository.ChatCharacterRepository
 import kr.co.vividnext.sodalive.chat.character.repository.ChatCharacterTagRepository
 import kr.co.vividnext.sodalive.chat.character.repository.ChatCharacterValueRepository
-import kr.co.vividnext.sodalive.member.Member
 import org.springframework.data.domain.PageRequest
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
@@ -26,16 +25,6 @@ class ChatCharacterService(
     private val hobbyRepository: ChatCharacterHobbyRepository,
     private val goalRepository: ChatCharacterGoalRepository
 ) {
-
-    /**
-     * 최근에 대화한 캐릭터 목록 조회
-     */
-    @Transactional(readOnly = true)
-    fun getRecentCharacters(member: Member?, limit: Int = 10): List<ChatCharacter> {
-        if (member == null) return emptyList()
-        return chatCharacterRepository.findRecentCharactersByMember(member, PageRequest.of(0, limit))
-    }
-
     /**
      * 일주일간 대화가 가장 많은 인기 캐릭터 목록 조회
      * 현재는 채팅방 구현 전이므로 빈 리스트 반환

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

@@ -184,9 +184,8 @@ class ChatRoomService(
     }
 
     @Transactional(readOnly = true)
-    fun listMyChatRooms(member: Member, page: Int): List<ChatRoomListItemDto> {
-        // 기본 페이지당 20개 고정
-        val pageable = PageRequest.of(if (page < 0) 0 else page, 20)
+    fun listMyChatRooms(member: Member, page: Int, size: Int = 20): List<ChatRoomListItemDto> {
+        val pageable = PageRequest.of(if (page < 0) 0 else page, size)
         val rooms: List<ChatRoomListQueryDto> = chatRoomRepository.findMemberRoomsOrderByLastMessageDesc(
             member,
             pageable
@@ -200,7 +199,7 @@ class ChatRoomService(
 
             val latest = messageRepository.findTopByChatRoomAndIsActiveTrueOrderByCreatedAtDesc(room)
             val preview = latest?.message?.let { msg ->
-                if (msg.length <= 25) msg else msg.substring(0, 25) + "..."
+                if (msg.length <= 25) msg else msg.take(25) + "..."
             }
 
             ChatRoomListItemDto(