Новый api отправки сообщений

Demo/Pages/SubmitPage.cs

@@ -10,9 +10,7 @@ public sealed class SubmitPage : SingletonPage
 {
     public override async Task OnEnter(PageContext ctx, CancellationToken ct)
     {
-        var progress = new MessageBuilder(ctx);
-
-        var messageId = await progress
+        var messageId = await new MessageBuilder(ctx)
             .Text("Отправка заявки\n7%")
             .SendAsync(ct);
 
@@ -21,7 +19,7 @@ public sealed class SubmitPage : SingletonPage
         {
             i += 25;
             Thread.Sleep(TimeSpan.FromMilliseconds(200));
-            await progress
+            await new MessageBuilder(ctx)
                 .Text($"Отправка заявки\n{i}%")
                 .EditMessage(messageId!)
                 .SendAsync(ct);