feat(recommendation): 첫 오디오 콘텐츠 플래그를 확장한다

src/test/kotlin/kr/co/vividnext/sodalive/v2/api/content/overview/dto/ContentOverviewPageResponseTest.kt

@@ -65,7 +65,9 @@ class ContentOverviewPageResponseTest {
                 title = "first audio",
                 price = 100,
                 coverImage = "cover/audio.png",
-                isPointAvailable = true
+                isPointAvailable = true,
+                isAdult = true,
+                isOriginalSeries = true
             ),
             coverImage = "https://cdn.test/cover/audio.png",
             isAdult = true,

src/test/kotlin/kr/co/vividnext/sodalive/v2/recommendation/adapter/out/persistence/DefaultHomeRecommendationQueryRepositoryTest.kt

@@ -1164,6 +1164,25 @@ class DefaultHomeRecommendationQueryRepositoryTest @Autowired constructor(
         assertEquals(listOf(oldest.id), page1.map { it.contentId })
     }
 
+    @Test
+    @DisplayName("첫 오디오 콘텐츠는 성인 여부와 오리지널 시리즈 여부를 함께 조회한다")
+    fun shouldMapFirstAudioContentAdultAndOriginalSeriesFlags() {
+        val now = LocalDateTime.of(2026, 5, 31, 10, 0)
+        val creator = saveMember("first-audio-flags", MemberRole.CREATOR)
+        val content = saveAudioContent(creator, now.minusDays(1), isActive = true, isAdult = false)
+        val series = saveSeries("first-audio-original-series", creator, isActive = true).apply {
+            isOriginal = true
+        }
+        saveSeriesContent(series, content)
+        updateCreatedAt("AudioContent", content.id!!, now.minusDays(1))
+        flushAndClear()
+
+        val contents = repository.findFirstAudioContents(now, limit = 10)
+
+        assertEquals(false, contents.single().isAdult)
+        assertEquals(true, contents.single().isOriginalSeries)
+    }
+
     @Test
     @DisplayName("첫 오디오 콘텐츠는 회원과 크리에이터의 양방향 차단 관계를 제외한다")
     fun shouldExcludeBidirectionalBlockedCreatorsFromFirstAudioContents() {

src/test/kotlin/kr/co/vividnext/sodalive/v2/recommendation/application/HomeRecommendationQueryServiceTest.kt

@@ -688,7 +688,9 @@ class HomeRecommendationQueryServiceTest {
                 title = "first-audio",
                 price = 10,
                 coverImage = "first-audio.png",
-                isPointAvailable = true
+                isPointAvailable = true,
+                isAdult = false,
+                isOriginalSeries = false
             )
         )
         var aiCharacterDetails: List<HomeAiCharacterRecommendationRecord> = emptyList()