优化

internal/handler/series.go

@@ -195,7 +195,8 @@ func listLibrarySeriesEpisodesHandler(svc *service.Container) gin.HandlerFunc {
 			writeInternalOrCanceled(c, err)
 			return
 		}
-		c.JSON(http.StatusOK, gin.H{"items": items, "total": len(items)})
+		grouped := service.GroupEpisodeVersionsForDisplay(items)
+		c.JSON(http.StatusOK, gin.H{"items": grouped, "total": len(grouped)})
 	}
 }
 
@@ -235,6 +236,7 @@ func listMediaEpisodesHandler(svc *service.Container) gin.HandlerFunc {
 			writeInternalOrCanceled(c, err)
 			return
 		}
-		c.JSON(http.StatusOK, gin.H{"items": items, "total": len(items)})
+		grouped := service.GroupEpisodeVersionsForDisplay(items)
+		c.JSON(http.StatusOK, gin.H{"items": grouped, "total": len(grouped)})
 	}
 }

internal/service/media_versions.go

@@ -120,6 +120,25 @@ func GroupMediaVersions(items []model.Media) []MediaItem {
 	return groupMediaVersions(items)
 }
 
+// GroupEpisodeVersionsForDisplay folds encoding/container variants into one
+// episode while preserving season/episode ordering for episode-list APIs.
+func GroupEpisodeVersionsForDisplay(items []model.Media) []MediaItem {
+	grouped := groupMediaVersions(items)
+	if grouped == nil {
+		return []MediaItem{}
+	}
+	sort.SliceStable(grouped, func(i, j int) bool {
+		if grouped[i].SeasonNum != grouped[j].SeasonNum {
+			return grouped[i].SeasonNum < grouped[j].SeasonNum
+		}
+		if grouped[i].EpisodeNum != grouped[j].EpisodeNum {
+			return grouped[i].EpisodeNum < grouped[j].EpisodeNum
+		}
+		return grouped[i].CreatedAt.Before(grouped[j].CreatedAt)
+	})
+	return grouped
+}
+
 func mediaVersionGroupKey(m model.Media) string {
 	// 远程 Emby 挂载条目保持独立，不与其它远程条目或本地条目折叠合并。
 	if IsEmbyRemoteID(m.ID) {

internal/service/media_versions_test.go

@@ -49,6 +49,28 @@ func TestGroupMediaVersionsMergesEpisodeByExternalIDAcrossLibraries(t *testing.T
 	}
 }
 
+func TestGroupEpisodeVersionsForDisplayMergesAndKeepsEpisodeOrder(t *testing.T) {
+	rows := []model.Media{
+		{Base: model.Base{ID: "ep2"}, LibraryID: "tv", Title: "Show", SeasonNum: 1, EpisodeNum: 2, TMDbID: 99, Path: "/show/s01e02.mkv"},
+		{Base: model.Base{ID: "ep1-small"}, LibraryID: "tv", Title: "Show", SeasonNum: 1, EpisodeNum: 1, TMDbID: 99, Path: "/show/s01e01.mp4", SizeBytes: 100},
+		{Base: model.Base{ID: "ep1-large"}, LibraryID: "tv", Title: "Show", SeasonNum: 1, EpisodeNum: 1, TMDbID: 99, Path: "/show/s01e01.mkv", SizeBytes: 200},
+	}
+
+	grouped := GroupEpisodeVersionsForDisplay(rows)
+	if len(grouped) != 2 {
+		t.Fatalf("grouped len = %d, want 2: %#v", len(grouped), grouped)
+	}
+	if grouped[0].EpisodeNum != 1 || len(grouped[0].Versions) != 2 {
+		t.Fatalf("episode 1 was not merged first: %#v", grouped)
+	}
+	if grouped[0].ID != "ep1-large" {
+		t.Fatalf("primary version = %q, want ep1-large", grouped[0].ID)
+	}
+	if grouped[1].EpisodeNum != 2 {
+		t.Fatalf("second item episode = %d, want 2", grouped[1].EpisodeNum)
+	}
+}
+
 func TestGroupMediaVersionsMergesMovieEncodingVariants(t *testing.T) {
 	hd := model.Media{
 		LibraryID:    "movies",