Move host transport records to model

engine/Age.Engine/Hosting/IAdvHost.cs

@@ -2,21 +2,6 @@ using Age.Engine.Model;
 
 namespace Age.Engine.Hosting;
 
-public readonly record struct AdvWaitIndicatorConfig(
-    int LayoutSlot, int X, int Y, int SurfaceSlot,
-    int SourceX, int SourceY, int CellWidth, int CellHeight,
-    int TerminalFrame, long FramePeriodMs)
-{
-    /// <summary>Select the current atlas frame. TerminalFrame is the exclusive native upper bound,
-    /// so SYSTEM4's value 12 addresses the twelve cells 0 through 11.</summary>
-    public int FrameAt(long elapsedMs)
-    {
-        int frameCount = System.Math.Max(1, TerminalFrame);
-        long period = System.Math.Max(1, FramePeriodMs);
-        return (int)(System.Math.Max(0, elapsedMs) / period % frameCount);
-    }
-}
-
 public interface IAdvHost
 {
     void ShowText(int offset, string text);