feat(home): 인기 커뮤니티 게시글 응답 필드를 추가한다

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

@@ -39,7 +39,21 @@ class HomeRecommendationResponseTest {
             ),
             genreCreators = emptyList(),
             cheerCreators = emptyList(),
-            popularCommunities = emptyList()
+            popularCommunityPosts = listOf(
+                HomePopularCommunityPostItem(
+                    postId = 5L,
+                    creatorId = 6L,
+                    creatorNickname = "community-creator",
+                    creatorProfileImage = "https://cdn.test/profile/community.png",
+                    imageUrl = "https://cdn.test/community/image.png",
+                    audioUrl = "https://cdn.test/community/audio.mp3",
+                    content = "community content",
+                    createdAt = "2026-06-01T00:00:00Z",
+                    likeCount = 7L,
+                    commentCount = 8L,
+                    existOrdered = true
+                )
+            )
         )
 
         val json = objectMapper.readTree(objectMapper.writeValueAsString(response))
@@ -47,5 +61,9 @@ class HomeRecommendationResponseTest {
         assertEquals(true, json["firstAudioContents"][0]["isPointAvailable"].asBoolean())
         assertFalse(json["firstAudioContents"][0].has("pointAvailable"))
         assertEquals("https://cdn.test/profile/character.png", json["aiCharacters"][0]["profileImage"].asText())
+        assertEquals(5L, json["popularCommunityPosts"][0]["postId"].asLong())
+        assertEquals("https://cdn.test/community/image.png", json["popularCommunityPosts"][0]["imageUrl"].asText())
+        assertEquals("https://cdn.test/community/audio.mp3", json["popularCommunityPosts"][0]["audioUrl"].asText())
+        assertEquals(true, json["popularCommunityPosts"][0]["existOrdered"].asBoolean())
     }
 }