src/main/kotlin/kr/co/vividnext/sodalive/chat/room/controller/ChatRoomController.kt

@@ -6,6 +6,7 @@ import kr.co.vividnext.sodalive.common.ApiResponse
 import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.member.Member
 import org.springframework.security.core.annotation.AuthenticationPrincipal
+import org.springframework.web.bind.annotation.GetMapping
 import org.springframework.web.bind.annotation.PostMapping
 import org.springframework.web.bind.annotation.RequestBody
 import org.springframework.web.bind.annotation.RequestMapping
@@ -42,4 +43,21 @@ class ChatRoomController(
         val response = chatRoomService.createOrGetChatRoom(member, request.characterId)
         ApiResponse.ok(response)
     }
+
+    /**
+     * 내가 참여 중인 채팅방 목록 조회 API
+     * - 페이징(기본 20개)
+     * - 가장 최근 메시지 기준 내림차순
+     */
+    @GetMapping("/list")
+    fun listMyChatRooms(
+        @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
+    ) = run {
+        if (member == null || member.auth == null) {
+            ApiResponse.ok(emptyList())
+        } else {
+            val response = chatRoomService.listMyChatRooms(member)
+            ApiResponse.ok(response)
+        }
+    }
 }

src/main/kotlin/kr/co/vividnext/sodalive/chat/room/dto/ChatRoomDto.kt

@@ -14,6 +14,25 @@ data class CreateChatRoomResponse(
     val chatRoomId: Long
 )
 
+/**
+ * 채팅방 목록 아이템 DTO (API 응답용)
+ */
+data class ChatRoomListItemDto(
+    val chatRoomId: Long,
+    val title: String,
+    val imageUrl: String,
+    val lastMessagePreview: String?
+)
+
+/**
+ * 채팅방 목록 쿼리 DTO (레포지토리 투영용)
+ */
+data class ChatRoomListQueryDto(
+    val chatRoomId: Long,
+    val title: String,
+    val imagePath: String?
+)
+
 /**
  * 외부 API 채팅 세션 응답 DTO
  */

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

@@ -0,0 +1,11 @@
+package kr.co.vividnext.sodalive.chat.room.repository
+
+import kr.co.vividnext.sodalive.chat.room.CharacterChatMessage
+import kr.co.vividnext.sodalive.chat.room.CharacterChatRoom
+import org.springframework.data.jpa.repository.JpaRepository
+import org.springframework.stereotype.Repository
+
+@Repository
+interface CharacterChatMessageRepository : JpaRepository<CharacterChatMessage, Long> {
+    fun findTopByChatRoomAndIsActiveTrueOrderByCreatedAtDesc(chatRoom: CharacterChatRoom): CharacterChatMessage?
+}

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

@@ -2,6 +2,7 @@ package kr.co.vividnext.sodalive.chat.room.repository
 
 import kr.co.vividnext.sodalive.chat.character.ChatCharacter
 import kr.co.vividnext.sodalive.chat.room.CharacterChatRoom
+import kr.co.vividnext.sodalive.chat.room.dto.ChatRoomListQueryDto
 import kr.co.vividnext.sodalive.member.Member
 import org.springframework.data.jpa.repository.JpaRepository
 import org.springframework.data.jpa.repository.Query
@@ -13,10 +14,6 @@ interface CharacterChatRoomRepository : JpaRepository<CharacterChatRoom, Long> {
 
     /**
      * 특정 멤버와 캐릭터가 참여 중인 활성화된 채팅방을 찾는 쿼리
-     *
-     * @param member 멤버
-     * @param character 캐릭터
-     * @return 활성화된 채팅방 (없으면 null)
      */
     @Query(
         """
@@ -32,4 +29,32 @@ interface CharacterChatRoomRepository : JpaRepository<CharacterChatRoom, Long> {
         @Param("member") member: Member,
         @Param("character") character: ChatCharacter
     ): CharacterChatRoom?
+
+    /**
+     * 멤버가 참여 중인 채팅방을 최근 메시지 시간 순으로 페이징 조회
+     * - 메시지가 없으면 방 생성 시간(createdAt)으로 대체
+     */
+    @Query(
+        value = """
+            SELECT new kr.co.vividnext.sodalive.chat.room.dto.ChatRoomListQueryDto(
+                r.id,
+                r.title,
+                pc.character.imagePath
+            )
+            FROM CharacterChatRoom r
+            JOIN r.participants p
+            JOIN r.participants pc
+            LEFT JOIN r.messages m
+            WHERE p.member = :member
+              AND p.isActive = true
+              AND pc.participantType = kr.co.vividnext.sodalive.chat.room.ParticipantType.CHARACTER
+              AND pc.isActive = true
+              AND r.isActive = true
+            GROUP BY r.id, r.title, r.createdAt, pc.character.imagePath
+            ORDER BY COALESCE(MAX(m.createdAt), r.createdAt) DESC
+        """
+    )
+    fun findMemberRoomsOrderByLastMessageDesc(
+        @Param("member") member: Member
+    ): List<ChatRoomListQueryDto>
 }

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

@@ -5,8 +5,11 @@ import kr.co.vividnext.sodalive.chat.character.service.ChatCharacterService
 import kr.co.vividnext.sodalive.chat.room.CharacterChatParticipant
 import kr.co.vividnext.sodalive.chat.room.CharacterChatRoom
 import kr.co.vividnext.sodalive.chat.room.ParticipantType
+import kr.co.vividnext.sodalive.chat.room.dto.ChatRoomListItemDto
+import kr.co.vividnext.sodalive.chat.room.dto.ChatRoomListQueryDto
 import kr.co.vividnext.sodalive.chat.room.dto.CreateChatRoomResponse
 import kr.co.vividnext.sodalive.chat.room.dto.ExternalChatSessionResponse
+import kr.co.vividnext.sodalive.chat.room.repository.CharacterChatMessageRepository
 import kr.co.vividnext.sodalive.chat.room.repository.CharacterChatParticipantRepository
 import kr.co.vividnext.sodalive.chat.room.repository.CharacterChatRoomRepository
 import kr.co.vividnext.sodalive.common.SodaException
@@ -26,6 +29,7 @@ import java.util.UUID
 class ChatRoomService(
     private val chatRoomRepository: CharacterChatRoomRepository,
     private val participantRepository: CharacterChatParticipantRepository,
+    private val messageRepository: CharacterChatMessageRepository,
     private val characterService: ChatCharacterService,
 
     @Value("\${weraser.api-key}")
@@ -35,7 +39,10 @@ class ChatRoomService(
     private val apiUrl: String,
 
     @Value("\${server.env}")
-    private val serverEnv: String
+    private val serverEnv: String,
+
+    @Value("\${cloud.aws.cloud-front.host}")
+    private val imageHost: String
 ) {
 
     /**
@@ -164,4 +171,28 @@ class ChatRoomService(
             throw SodaException("${e.message}, 채팅방 생성에 실패했습니다. 다시 시도해 주세요.")
         }
     }
+
+    @Transactional(readOnly = true)
+    fun listMyChatRooms(member: Member): List<ChatRoomListItemDto> {
+        val rooms: List<ChatRoomListQueryDto> = chatRoomRepository.findMemberRoomsOrderByLastMessageDesc(member)
+        return rooms.map { q ->
+            val room = CharacterChatRoom(
+                sessionId = "",
+                title = q.title,
+                isActive = true
+            ).apply { id = q.chatRoomId }
+
+            val latest = messageRepository.findTopByChatRoomAndIsActiveTrueOrderByCreatedAtDesc(room)
+            val preview = latest?.message?.let { msg ->
+                if (msg.length <= 25) msg else msg.substring(0, 25) + "..."
+            }
+
+            ChatRoomListItemDto(
+                chatRoomId = q.chatRoomId,
+                title = q.title,
+                imageUrl = "$imageHost/${q.imagePath ?: "profile/default-profile.png"}",
+                lastMessagePreview = preview
+            )
+        }
+    }
 }