feat(home): AI 캐릭터 추천 점수 정책을 변경한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/recommendation/domain/RecommendationScorePolicy.kt

@@ -9,7 +9,13 @@ class RecommendationScorePolicy {
     }
 
     fun calculateAiCharacterNewBoost(createdAt: LocalDateTime, now: LocalDateTime): Double {
-        return calculateNewBoost(createdAt, now)
+        val days = ChronoUnit.DAYS.between(createdAt.toLocalDate(), now.toLocalDate())
+        return when {
+            days <= RecommendationScoreSpec.NEW_BOOST_10_DAY_LIMIT -> RecommendationScoreSpec.AI_NEW_BOOST_10_DAYS
+            days <= RecommendationScoreSpec.NEW_BOOST_20_DAY_LIMIT -> RecommendationScoreSpec.AI_NEW_BOOST_20_DAYS
+            days <= RecommendationScoreSpec.NEW_BOOST_30_DAY_LIMIT -> RecommendationScoreSpec.AI_NEW_BOOST_30_DAYS
+            else -> RecommendationScoreSpec.DEFAULT_NEW_BOOST
+        }
     }
 
     fun calculateDebutCreatorScore(
@@ -28,11 +34,13 @@ class RecommendationScorePolicy {
     fun calculateAiChatScore(
         recentChatCount: Long,
         recentActiveUserCount: Long,
+        followIncreaseCount: Long,
         newBoost: Double
     ): Double {
         return (
-            (RecommendationScoreSpec.AI_RECENT_CHAT_WEIGHT * recentChatCount) +
+            (RecommendationScoreSpec.AI_CHAT_WEIGHT * recentChatCount) +
-                (RecommendationScoreSpec.AI_RECENT_ACTIVE_USER_WEIGHT * recentActiveUserCount)
+                (RecommendationScoreSpec.AI_ACTIVE_USER_WEIGHT * recentActiveUserCount) +
+                (RecommendationScoreSpec.AI_FOLLOW_INCREASE_WEIGHT * followIncreaseCount)
             ) * newBoost
     }
 

src/main/kotlin/kr/co/vividnext/sodalive/v2/recommendation/domain/RecommendationScoreSpec.kt

@@ -9,8 +9,9 @@ object RecommendationScoreSpec {
     const val DEBUT_CONTENT_ACTIVITY_WEIGHT = 0.3
     const val DEBUT_COMMUNICATION_WEIGHT = 0.2
 
-    const val AI_RECENT_CHAT_WEIGHT = 0.45
+    const val AI_CHAT_WEIGHT = 0.45
-    const val AI_RECENT_ACTIVE_USER_WEIGHT = 0.35
+    const val AI_ACTIVE_USER_WEIGHT = 0.35
+    const val AI_FOLLOW_INCREASE_WEIGHT = 0.20
 
     const val CHEER_DONATION_AMOUNT_WEIGHT = 0.6
     const val CHEER_FAN_TALK_WEIGHT = 0.3
@@ -23,5 +24,8 @@ object RecommendationScoreSpec {
     const val NEW_BOOST_10_DAYS = 1.5
     const val NEW_BOOST_20_DAYS = 1.3
     const val NEW_BOOST_30_DAYS = 1.2
+    const val AI_NEW_BOOST_10_DAYS = 1.15
+    const val AI_NEW_BOOST_20_DAYS = 1.10
+    const val AI_NEW_BOOST_30_DAYS = 1.05
     const val DEFAULT_NEW_BOOST = 1.0
 }

src/test/kotlin/kr/co/vividnext/sodalive/v2/recommendation/domain/RecommendationScorePolicyTest.kt

@@ -27,10 +27,20 @@ class RecommendationScorePolicyTest {
     fun shouldApplyAiCharacterNewBoostByCreatedDays() {
         val now = LocalDateTime.of(2026, 5, 30, 12, 0)
 
-        assertEquals(1.5, policy.calculateAiCharacterNewBoost(now.minusDays(10), now), 0.0001)
+        assertEquals(1.15, RecommendationScoreSpec.AI_NEW_BOOST_10_DAYS, 0.0001)
-        assertEquals(1.3, policy.calculateAiCharacterNewBoost(now.minusDays(20), now), 0.0001)
+        assertEquals(1.10, RecommendationScoreSpec.AI_NEW_BOOST_20_DAYS, 0.0001)
-        assertEquals(1.2, policy.calculateAiCharacterNewBoost(now.minusDays(30), now), 0.0001)
+        assertEquals(1.05, RecommendationScoreSpec.AI_NEW_BOOST_30_DAYS, 0.0001)
+        assertEquals(1.15, policy.calculateAiCharacterNewBoost(now, now), 0.0001)
+        assertEquals(1.15, policy.calculateAiCharacterNewBoost(now.minusDays(10), now), 0.0001)
+        assertEquals(1.10, policy.calculateAiCharacterNewBoost(now.minusDays(11), now), 0.0001)
+        assertEquals(1.10, policy.calculateAiCharacterNewBoost(now.minusDays(20), now), 0.0001)
+        assertEquals(1.05, policy.calculateAiCharacterNewBoost(now.minusDays(21), now), 0.0001)
+        assertEquals(1.05, policy.calculateAiCharacterNewBoost(now.minusDays(30), now), 0.0001)
         assertEquals(1.0, policy.calculateAiCharacterNewBoost(now.minusDays(31), now), 0.0001)
+
+        assertEquals(1.5, policy.calculateCreatorNewBoost(now.minusDays(10), now), 0.0001)
+        assertEquals(1.3, policy.calculateCreatorNewBoost(now.minusDays(20), now), 0.0001)
+        assertEquals(1.2, policy.calculateCreatorNewBoost(now.minusDays(30), now), 0.0001)
     }
 
     @Test
@@ -51,18 +61,18 @@ class RecommendationScorePolicyTest {
     }
 
     @Test
-    @DisplayName("AI 채팅 추천 점수는 이번 스프린트에서 팔로우 증가량을 제외한다")
+    @DisplayName("AI 채팅 추천 점수는 AI 발화 수, 활성 사용자 수, 팔로우 증가량 가중치와 신규 부스트를 적용한다")
     fun shouldCalculateAiChatScore() {
-        assertEquals(0.45, RecommendationScoreSpec.AI_RECENT_CHAT_WEIGHT, 0.0001)
+        assertEquals(0.45, RecommendationScoreSpec.AI_CHAT_WEIGHT, 0.0001)
-        assertEquals(0.35, RecommendationScoreSpec.AI_RECENT_ACTIVE_USER_WEIGHT, 0.0001)
+        assertEquals(0.35, RecommendationScoreSpec.AI_ACTIVE_USER_WEIGHT, 0.0001)
+        assertEquals(0.20, RecommendationScoreSpec.AI_FOLLOW_INCREASE_WEIGHT, 0.0001)
 
-        val score = policy.calculateAiChatScore(
+        assertEquals(0.0, policy.calculateAiChatScore(0, 0, 0, 1.0), 0.0001)
-            recentChatCount = 100,
+        assertEquals(4.5, policy.calculateAiChatScore(10, 0, 0, 1.0), 0.0001)
-            recentActiveUserCount = 20,
+        assertEquals(3.5, policy.calculateAiChatScore(0, 10, 0, 1.0), 0.0001)
-            newBoost = 1.3
+        assertEquals(2.0, policy.calculateAiChatScore(0, 0, 10, 1.0), 0.0001)
-        )
+        assertEquals(10.0, policy.calculateAiChatScore(10, 10, 10, 1.0), 0.0001)
-
+        assertEquals(11.5, policy.calculateAiChatScore(10, 10, 10, 1.15), 0.0001)
-        assertEquals(67.6, score, 0.0001)
     }
 
     @Test