feat: load legacy Cuts and Res runtime assets

src/MBN_STOCK_WEBVIEW.Playout/Configuration/PlayoutOptionsLoader.cs

@@ -23,6 +23,7 @@ public static class PlayoutOptionsLoader
     {
         var options = LoadJson(path ?? DefaultPath);
         ApplyEnvironment(options);
+        ApplyExecutableAssetDefaults(options, AppContext.BaseDirectory);
         return options;
     }
 
@@ -42,6 +43,36 @@ public static class PlayoutOptionsLoader
             RequiredLiveAuthorizationValue,
             StringComparison.Ordinal);
 
+    internal static void ApplyExecutableAssetDefaults(
+        PlayoutOptions options,
+        string? baseDirectory)
+    {
+        ArgumentNullException.ThrowIfNull(options);
+        if (!string.IsNullOrWhiteSpace(options.SceneDirectory) ||
+            string.IsNullOrWhiteSpace(baseDirectory))
+        {
+            return;
+        }
+
+        try
+        {
+            var cutsDirectory = Path.Combine(
+                Path.GetFullPath(baseDirectory),
+                "Cuts");
+            if (Directory.Exists(cutsDirectory))
+            {
+                options.SceneDirectory = cutsDirectory;
+            }
+        }
+        catch (Exception exception) when (
+            exception is ArgumentException or IOException or NotSupportedException or
+                System.Security.SecurityException)
+        {
+            // A missing or invalid executable asset root leaves the existing safe
+            // configuration unchanged; validation reports it if a command needs it.
+        }
+    }
+
     private static PlayoutOptions LoadJson(string path)
     {
         if (!File.Exists(path))