fix issue 51 library reclassify regressions

internal/service/emby_versions_test.go

@@ -107,3 +107,61 @@ func TestEmbyMergedLocalCloudMovieVersionsShareMediaSources(t *testing.T) {
 		t.Fatalf("playback should expose local and cloud versions, got %#v", playSources)
 	}
 }
+
+func TestEmbyLatestItemsCollapsesMovieVersions(t *testing.T) {
+	svc := newTestEmbyService(t)
+	lib := model.Library{Name: "电影", Path: `/media/movies`, Type: "movie", Enabled: true}
+	if err := svc.repo.Library.Create(t.Context(), &lib); err != nil {
+		t.Fatalf("create library: %v", err)
+	}
+	now := time.Now()
+	for _, media := range []model.Media{
+		{
+			Base:      model.Base{ID: "dune-1080", CreatedAt: now.Add(time.Minute)},
+			LibraryID: lib.ID,
+			Title:     "Dune",
+			Year:      2021,
+			TMDbID:    438631,
+			Path:      `/media/movies/Dune.2021.1080p.mkv`,
+			Width:     1920,
+			SizeBytes: 100,
+		},
+		{
+			Base:      model.Base{ID: "dune-2160", CreatedAt: now.Add(2 * time.Minute)},
+			LibraryID: lib.ID,
+			Title:     "Dune",
+			Year:      2021,
+			TMDbID:    438631,
+			Path:      `/media/movies/Dune.2021.2160p.mkv`,
+			Width:     3840,
+			SizeBytes: 200,
+		},
+		{
+			Base:      model.Base{ID: "matrix", CreatedAt: now},
+			LibraryID: lib.ID,
+			Title:     "The Matrix",
+			Year:      1999,
+			TMDbID:    603,
+			Path:      `/media/movies/The.Matrix.1999.mkv`,
+		},
+	} {
+		if err := svc.repo.DB.Create(&media).Error; err != nil {
+			t.Fatalf("create media: %v", err)
+		}
+	}
+
+	latest, err := svc.LatestItems(t.Context(), "user-1", lib.ID, 10)
+	if err != nil {
+		t.Fatalf("latest items: %v", err)
+	}
+	if len(latest) != 2 {
+		t.Fatalf("latest items = %#v, want Dune collapsed plus Matrix", latest)
+	}
+	if latest[0]["Id"] != "dune-2160" {
+		t.Fatalf("latest first item = %#v, want best Dune version", latest[0])
+	}
+	sources := latest[0]["MediaSources"].([]map[string]any)
+	if len(sources) != 2 {
+		t.Fatalf("collapsed latest item should expose both versions, got %#v", sources)
+	}
+}