fix(chat): 배너 목록 응답 생성을 서비스로 옮긴다

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

@@ -1,5 +1,7 @@
 package kr.co.vividnext.sodalive.chat.character.service
 
+import kr.co.vividnext.sodalive.admin.chat.dto.ChatCharacterBannerListPageResponse
+import kr.co.vividnext.sodalive.admin.chat.dto.ChatCharacterBannerResponse
 import kr.co.vividnext.sodalive.chat.character.ChatCharacterBanner
 import kr.co.vividnext.sodalive.chat.character.repository.ChatCharacterBannerRepository
 import kr.co.vividnext.sodalive.chat.character.repository.ChatCharacterRepository
@@ -11,6 +13,7 @@ import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
 
 @Service
+@Transactional(readOnly = true)
 class ChatCharacterBannerService(
     private val bannerRepository: ChatCharacterBannerRepository,
     private val characterRepository: ChatCharacterRepository
@@ -18,8 +21,18 @@ class ChatCharacterBannerService(
     /**
      * 활성화된 모든 배너 조회 (정렬 순서대로)
      */
-    fun getActiveBanners(pageable: Pageable): Page<ChatCharacterBanner> {
-        return bannerRepository.findByIsActiveTrueOrderBySortOrderAsc(pageable)
+    fun getActiveBanners(pageable: Pageable, imageHost: String): ChatCharacterBannerListPageResponse {
+        val banners = bannerRepository.findByIsActiveTrueOrderBySortOrderAsc(pageable)
+        return ChatCharacterBannerListPageResponse(
+            totalCount = banners.totalElements,
+            content = banners.content.map {
+                ChatCharacterBannerResponse.from(
+                    banner = it,
+                    imageHost = imageHost,
+                    appendLanguageToCharacterName = true
+                )
+            }
+        )
     }
 
     fun getDisplayBanners(pageable: Pageable, lang: Lang): Page<ChatCharacterBanner> {