Refactor AdminUserEndpoints and MediaEndpoints to include default parameter values for pagination and filtering, improving API usability. Update ManualInboxDialog to enhance show selection logic with auto-detection based on file names, and improve user feedback with new translations. Refactor PostgresFixture for better container management in integration tests.

backend/src/TeleWave.Application/Library/GetShow/GetShowQueryHandler.cs

@@ -74,6 +74,8 @@ public sealed class GetShowQueryHandler(IAppDbContext dbContext)
             })
             .ToList();
 
+        // Сортировка идёт до сборки DTO: по свойству record'а EF порядок не переводит и падает
+        // на компиляции запроса («The LINQ expression could not be translated»).
         var collections = await dbContext
             .CollectionItems.AsNoTracking()
             .Where(i => i.ShowId == show.Id)
@@ -82,9 +84,15 @@ public sealed class GetShowQueryHandler(IAppDbContext dbContext)
                 item => item.CollectionId,
                 collection => collection.Id,
                 (item, collection) =>
-                    new ShowCollectionRefDto(collection.Id, collection.Name, item.Position)
+                    new
+                    {
+                        collection.Id,
+                        collection.Name,
+                        item.Position,
+                    }
             )
             .OrderBy(c => c.Name)
+            .Select(c => new ShowCollectionRefDto(c.Id, c.Name, c.Position))
             .ToListAsync(cancellationToken);
 
         return Result.Success(