fix(home): AI 캐릭터 홈 노출 개수를 늘린다

src/main/kotlin/kr/co/vividnext/sodalive/v2/api/home/application/HomeRecommendationFacade.kt

@@ -315,7 +315,7 @@ class HomeRecommendationFacade(
         private const val HOME_ACTIVE_CREATOR_LIMIT = 10
         private const val HOME_RECENT_DEBUT_CREATOR_LIMIT = 10
         private const val HOME_FIRST_AUDIO_CONTENT_LIMIT = 10
-        private const val HOME_AI_CHARACTER_LIMIT = 10
+        private const val HOME_AI_CHARACTER_LIMIT = 20
         private const val HOME_GENRE_CREATOR_GENRE_LIMIT = 5
         private const val HOME_GENRE_CREATOR_CREATOR_LIMIT = 8
         private const val HOME_CHEER_CREATOR_LIMIT = 8

src/main/kotlin/kr/co/vividnext/sodalive/v2/recommendation/application/HomeRecommendationQueryService.kt

@@ -164,7 +164,7 @@ class HomeRecommendationQueryService(
         private const val DEFAULT_ACTIVE_CREATOR_LIMIT = 10
         private const val DEFAULT_RECENT_DEBUT_CREATOR_LIMIT = 10
         private const val DEFAULT_FIRST_AUDIO_CONTENT_LIMIT = 10
-        private const val DEFAULT_AI_CHARACTER_LIMIT = 10
+        private const val DEFAULT_AI_CHARACTER_LIMIT = 20
         private const val DEFAULT_CHEER_CREATOR_LIMIT = 8
         private const val CHEER_CREATOR_CANDIDATE_LIMIT = 16
         private const val DEFAULT_POPULAR_COMMUNITY_LIMIT = 10

src/test/kotlin/kr/co/vividnext/sodalive/v2/api/home/HomeRecommendationControllerTest.kt

@@ -243,6 +243,22 @@ class HomeRecommendationControllerTest @Autowired constructor(
             .andExpect(jsonPath("$.data.lives").isArray)
     }
 
+    @Test
+    @DisplayName("메인 홈 통합 조회는 AI 캐릭터를 최신 스냅샷 기준 최대 20개까지 반환한다")
+    fun shouldReturnTwentyAiCharactersOnHomeRecommendations() {
+        (1..22).forEach { index ->
+            val character = saveAiCharacter("home-ai-character-$index")
+            saveRecommendationSnapshot(character.id!!)
+        }
+        entityManager.flush()
+        entityManager.clear()
+
+        mockMvc.perform(get("/api/v2/home/recommendations"))
+            .andExpect(status().isOk)
+            .andExpect(jsonPath("$.success").value(true))
+            .andExpect(jsonPath("$.data.aiCharacters.length()").value(20))
+    }
+
     @Test
     @DisplayName("메인 홈 통합 조회 실패는 응답 시간과 함께 로그로 관측된다")
     fun shouldLogHomeRecommendationFailure(output: CapturedOutput) {

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

@@ -141,7 +141,7 @@ class HomeRecommendationQueryServiceTest {
     }
 
     @Test
-    @DisplayName("AI 캐릭터 추천은 최신 스냅샷 10개를 기준으로 순서를 유지해 상세를 조립한다")
+    @DisplayName("AI 캐릭터 추천은 최신 스냅샷 20개를 기준으로 순서를 유지해 상세를 조립한다")
     fun shouldFindAiCharactersFromLatestSnapshotsWithLimitAndDetails() {
         val oldSnapshotAt = LocalDateTime.of(2026, 5, 28, 23, 59, 59)
         val latestSnapshotAt = LocalDateTime.of(2026, 5, 29, 23, 59, 59)
@@ -153,7 +153,7 @@ class HomeRecommendationQueryServiceTest {
         snapshotPort.replaceSnapshots(
             RecommendedSectionType.AI_CHARACTER,
             latestSnapshotAt,
-            (1L..12L).map { targetId ->
+            (1L..22L).map { targetId ->
                 snapshot(RecommendedSectionType.AI_CHARACTER, targetId, 100.0 - targetId, latestSnapshotAt)
             }
         )
@@ -180,7 +180,7 @@ class HomeRecommendationQueryServiceTest {
 
         val characters = service.findAiCharacterRecommendations()
 
-        assertEquals((1L..10L).toList(), port.aiCharacterDetailIds)
+        assertEquals((1L..20L).toList(), port.aiCharacterDetailIds)
         assertEquals(listOf(1L, 2L), characters.map { it.characterId })
         assertEquals(listOf(101L, 102L), characters.map { it.creatorId })
         assertEquals("profile/character-1.png", characters.first().profileImage)