Surface extras across all versions

MediaBrowser.Controller/Entities/BaseItem.cs

@@ -2854,6 +2854,15 @@ namespace MediaBrowser.Controller.Entities
             return LibraryManager.Sort(GetExtras(user).Where(e => e.ExtraType == Model.Entities.ExtraType.ThemeVideo), user, orderBy).ToArray();
         }
 
+        /// <summary>
+        /// Gets the ids of the items whose owned extras belong to this item.
+        /// </summary>
+        /// <returns>An array containing the owner ids.</returns>
+        protected virtual Guid[] GetExtraOwnerIds()
+        {
+            return [Id];
+        }
+
         /// <summary>
         /// Get all extras associated with this item, sorted by <see cref="SortName"/>.
         /// </summary>
@@ -2863,7 +2872,7 @@ namespace MediaBrowser.Controller.Entities
         {
             return LibraryManager.GetItemList(new InternalItemsQuery(user)
             {
-                OwnerIds = [Id],
+                OwnerIds = GetExtraOwnerIds(),
                 OrderBy = [(ItemSortBy.SortName, SortOrder.Ascending)]
             });
         }
@@ -2878,7 +2887,7 @@ namespace MediaBrowser.Controller.Entities
         {
             return LibraryManager.GetItemList(new InternalItemsQuery(user)
             {
-                OwnerIds = [Id],
+                OwnerIds = GetExtraOwnerIds(),
                 ExtraTypes = extraTypes.ToArray(),
                 OrderBy = [(ItemSortBy.SortName, SortOrder.Ascending)]
             });