feat(interaction): 新增分集计数统计接口

fruitshorts-module-content/src/main/java/com/fruitshorts/content/service/EpisodeService.java

@@ -158,6 +158,20 @@ public class EpisodeService implements EpisodeTranscodeCompletionPort, EpisodeVi
                 Wrappers.<DramaEpisode>lambdaQuery().in(DramaEpisode::getId, ids));
     }
 
+    /** C 端：按 ID 批量取已上线剧集，用于只读统计。 */
+    public List<DramaEpisode> listPublishedByIds(Collection<Long> ids) {
+        if (ids == null || ids.isEmpty()) {
+            return List.of();
+        }
+        List<Long> normalized = ids.stream().filter(Objects::nonNull).distinct().toList();
+        if (normalized.isEmpty()) {
+            return List.of();
+        }
+        return dramaEpisodeMapper.selectList(Wrappers.<DramaEpisode>lambdaQuery()
+                .in(DramaEpisode::getId, normalized)
+                .eq(DramaEpisode::getStatus, ContentStatus.PUBLISHED.getCode()));
+    }
+
     @Transactional(rollbackFor = Exception.class)
     public Long create(EpisodeSaveReqVO req) {
         dramaService.getExisting(req.getDramaId());