Handle window close commands and interaction logic improvements

UI/GUI/Windows/Window.cs

@@ -222,10 +222,14 @@ public sealed class Window(string title, int processId, int id, IRenderSource re
             dragOffset = new Point(pointerPosition.X - Position.X, pointerPosition.Y - Position.Y);
         }
 
+        if (currentInteraction != InteractionMode.None || inBounds)
+        {
             if (currentInteraction != InteractionMode.None)
             {
                 interactionStartBounds = new Rectangle(Position, Size);
                 interactionStartPointer = pointerPosition;
+            }
+
             WindowManager.FocusWindow(this);
             return true;
         }

UI/GUI/Windows/WindowManager.cs

@@ -123,12 +123,27 @@ public static class WindowManager
 
     public static void CloseWindowsForProcess(int processId)
     {
+        List<Window> windowsToClose = new();
         lock (windowsLock)
         {
+            if (windows.TryGetValue(processId, out var processWindows))
+            {
+                windowsToClose.AddRange(processWindows);
                 windows.Remove(processId);
             }
         }
 
+        if (windowsToClose.Count > 0)
+        {
+            List<RenderCommand> closeCommands = new();
+            foreach (var window in windowsToClose)
+            {
+                closeCommands.Add(new RenderCommand { WindowId = window.Id, ElementId = window.Id, ElementType = "WindowClose", Position = window.Position, Properties = new Dictionary<string, object?>() });
+            }
+            renderSource.Render(closeCommands);
+        }
+    }
+
     public static void FocusWindow(Window? window)
     {
         if (focusedWindow == window)