Merge pull request '콘텐츠 메인 무료 탭 - 새로운 무료 콘텐츠' (#263) from test into main

Reviewed-on: #263

src/main/kotlin/kr/co/vividnext/sodalive/content/main/tab/free/AudioContentMainTabFreeService.kt

@@ -137,7 +137,11 @@ class AudioContentMainTabFreeService(
     ): List<GetAudioContentMainItem> {
         return audioContentRepository.findByTheme(
             memberId = member.id!!,
-            theme = listOf(theme),
+            theme = if (theme.isNotBlank()) {
+                listOf(theme)
+            } else {
+                emptyList()
+            },
             isAdult = member.auth != null && isAdultContentVisible,
             contentType = contentType,
             offset = offset,