use next engine with mpeg-ts hybrid streaming mode

ErsatzTV.Application/Channels/Commands/CreateChannelHandler.cs

@@ -114,7 +114,9 @@ public class CreateChannelHandler(
                 channel.PlayoutOffset = null;
             }
 
-            if (channel.StreamingEngine is StreamingEngine.Next)
+            if (channel.StreamingEngine is StreamingEngine.Next &&
+                channel.StreamingMode is not StreamingMode.HttpLiveStreamingSegmenter &&
+                channel.StreamingMode is not StreamingMode.TransportStreamHybrid)
             {
                 channel.StreamingMode = StreamingMode.HttpLiveStreamingSegmenter;
             }

ErsatzTV.Application/Channels/Commands/UpdateChannelHandler.cs

@@ -142,7 +142,9 @@ public class UpdateChannelHandler(
         c.WatermarkId = update.WatermarkId;
         c.FallbackFillerId = update.FallbackFillerId;
 
-        if (c.StreamingEngine is StreamingEngine.Next)
+        if (c.StreamingEngine is StreamingEngine.Next &&
+            c.StreamingMode is not StreamingMode.HttpLiveStreamingSegmenter &&
+            c.StreamingMode is not StreamingMode.TransportStreamHybrid)
         {
             c.StreamingMode = StreamingMode.HttpLiveStreamingSegmenter;
         }

ErsatzTV/Controllers/IptvController.cs

@@ -91,15 +91,6 @@ public class IptvController : StreamingControllerBase
             return NotFound();
         }
 
-        foreach (ChannelViewModel channel in maybeChannel)
-        {
-            // NEXT: MPEG-TS streams are not (yet?) supported
-            if (!channel.IsEnabled || channel.StreamingEngine is StreamingEngine.Next)
-            {
-                return NotFound();
-            }
-        }
-
         // if mode is "unspecified" - find the configured mode and set it or redirect
         if (string.IsNullOrWhiteSpace(mode) || mode == "mixed")
         {

ErsatzTV/Pages/ChannelEditor.razor

@@ -159,6 +159,7 @@ else
     <MudSelect @bind-Value="_model.StreamingMode" For="@(() => _model.StreamingMode)">
         @if (_model.StreamingEngine is StreamingEngine.Next)
         {
+            <MudSelectItem Value="@(StreamingMode.TransportStreamHybrid)">MPEG-TS</MudSelectItem>
             <MudSelectItem Value="@(StreamingMode.HttpLiveStreamingSegmenter)">HLS Segmenter</MudSelectItem>
         }
         else