Layers panel and scene strip: scene layers header with icons, per-type layer icons, PROGRAM badge and selected/live orange borders, scene name and hotkey overlays, Starting as default scene

- LeftPanel: SCENE LAYERS header with layer count; per-type blue icons; properties header gear; layers list min/max height; properties placeholder; list and properties indent
- SceneThumbnailStrip: names/hotkeys over the tile; PROGRAM badge with blinking red dot on the selected tile; orange border on selected and live tiles; fixed the element border override that hid the style border; reflag tiles on load
- LiveScene is now set on go-live, record start, and live transitions (it was never assigned, so IsLive never fired)
- Startup stages the scene named Starting
- DESIGN.md: color roles (red = YouTube/on-air/record, orange #ff8c3a = attention, amber = game audio/Super Chat)
- Staged live tile uses background art instead of the green LIVE placeholder

Not pushed.

ViewModels/MainViewModel.Background.cs

@@ -155,14 +155,10 @@ public partial class MainViewModel
                 ? OnAirImage
                 : SceneThumbnailImage(scene);
             if (img == null)
-            {
-                var stagedLive = isStaged
-                    && SceneCatalog.Is(scene.Name, SceneCatalog.Live);
-                img = stagedLive ? null : LoadBackgroundImage(scene);
-            }
+                img = LoadBackgroundImage(scene);
             if (img != null)
                 scene.Snapshot = img;
-            else if (scene.Snapshot == null || (isStaged && OnAirImage == null))
+            else if (scene.Snapshot == null)
                 scene.Snapshot = CreatePlaceholderSnapshot(scene.Name);
         }
     }
@@ -443,6 +439,7 @@ public partial class MainViewModel
         }
         SeedOnAirImage();
         OnPropertyChanged(nameof(ShowSourcesEmptyHint));
+        OnPropertyChanged(nameof(LayerCount));
     }
 
     // ─── Scene strip tile artwork (creator ruling 2026-10-10) ───

ViewModels/MainViewModel.Scenes.cs

@@ -45,6 +45,7 @@ public partial class MainViewModel
                 OnPropertyChanged(nameof(ShowEmptySceneHint));
                 OnPropertyChanged(nameof(ShowPreviewPlaceholder));
                 OnPropertyChanged(nameof(ShowSourcesEmptyHint));
+                OnPropertyChanged(nameof(LayerCount));
                 OnPropertyChanged(nameof(CanChangeBackground));
                 OnPropertyChanged(nameof(CanAddWebcam));
                 OnPropertyChanged(nameof(CanAddYouTubeChat));
@@ -102,7 +103,10 @@ public partial class MainViewModel
         if (scene.IsHidden || scene == StagedScene) return;
         StagedScene = scene;
         if (IsLive)
+        {
+            LiveScene = scene;
             _transition.Start(SelectedTransitionType, TransitionDurationMs, null);
+        }
     }
 
     /// <summary>
@@ -186,6 +190,7 @@ public partial class MainViewModel
     }
 
     public bool ShowEmptySceneHint => StagedScene != null && StagedScene.Elements.Count == 0;
+    public int LayerCount => StagedScene?.Elements.Count(e => !e.IsZoomLayer) ?? 0;
     public bool ShowSourcesEmptyHint => StagedScene == null || StagedScene.Elements.Count == 0;
 
     public bool IsCountdownAvailable => StagedScene != null

ViewModels/MainViewModel.Sources.cs

@@ -85,6 +85,7 @@ public partial class MainViewModel
 
         OnPropertyChanged(nameof(ShowEmptySceneHint));
         OnPropertyChanged(nameof(ShowSourcesEmptyHint));
+        OnPropertyChanged(nameof(LayerCount));
         UpdateActiveBackground();
     }
 
@@ -227,6 +228,7 @@ public partial class MainViewModel
         SelectedElement = source;
         OnPropertyChanged(nameof(ShowEmptySceneHint));
         OnPropertyChanged(nameof(ShowSourcesEmptyHint));
+        OnPropertyChanged(nameof(LayerCount));
         UpdateActiveBackground();
     }
 
@@ -260,6 +262,7 @@ public partial class MainViewModel
 
         OnPropertyChanged(nameof(ShowEmptySceneHint));
         OnPropertyChanged(nameof(ShowSourcesEmptyHint));
+        OnPropertyChanged(nameof(LayerCount));
         UpdateActiveBackground();
     }
 }

ViewModels/MainViewModel.Streaming.Operations.cs

@@ -65,6 +65,7 @@ public partial class MainViewModel : ViewModelBase
         ResetHealth(StreamStatus.Offline);
         _audioMixer.StartLive(EncoderOptions.DefaultAudioPipeName);
         IsRecording = true;
+        LiveScene = StagedScene;
         await _framePump.StartAsync();
     }
 
@@ -222,6 +223,7 @@ public partial class MainViewModel : ViewModelBase
         // only once frames flow. The liveChatId (snippet.liveChatId) does not exist
         // before that (2026-09-25 diagnosis), so chat resolution runs AFTER the pump
         // starts. Chat is non-fatal — if it fails, the stream continues without chat.
+        LiveScene = StagedScene;
         await _framePump.StartAsync(); // never throws; failures log + surface via Failed
 
         string? liveChatId = null;
@@ -324,6 +326,7 @@ public partial class MainViewModel : ViewModelBase
 
         StreamStatus = StreamStatus.Offline;
         IsRecording = false;
+        LiveScene = null;
         // TASK 41: a stopped test broadcast forgets its drawer session (idempotent)
         // and drops the TEST face — a test never outlives its run.
         TestSession.EndTestSilently();

ViewModels/MainViewModel.Webcam.cs

@@ -375,6 +375,7 @@ public partial class MainViewModel
 
         OnPropertyChanged(nameof(ShowEmptySceneHint));
         OnPropertyChanged(nameof(ShowSourcesEmptyHint));
+        OnPropertyChanged(nameof(LayerCount));
         UpdateActiveBackground();
 
         // PreviewBitmapChanged fires only on the camera's first frame, so a config

ViewModels/MainViewModel.cs

@@ -438,7 +438,7 @@ public partial class MainViewModel : ViewModelBase
         {
             _isLoading = false;
         }
-        StagedScene = Scenes.FirstOrDefault();
+        StagedScene = Scenes.FirstOrDefault(s => SceneCatalog.Is(s.Name, SceneCatalog.Starting)) ?? Scenes.FirstOrDefault();
         UpdateActiveBackground();
         UpdateActiveChatBoxPreviews();
         UpdateActiveAlertBoxPreviews();