Better move error visibility

Shogi.UI/Pages/Home/HomePage.razor

@@ -31,13 +31,11 @@
 	<h3>Capturing and the Hand</h3>
 	<h3>The King and "Check"</h3>
 	<h3>Victory</h3>
-
 </main>
 
 @code {
-
+	private bool show = true;
 	private string activeSessionName = string.Empty;
-
 	private Task OnLoginChanged()
 	{
 		StateHasChanged();
@@ -48,4 +46,10 @@
 		activeSessionName = s.SessionId.ToString();
 		StateHasChanged();
 	}
+
+	private void OnClickClose()
+	{
+		show = false;
+		StateHasChanged();
+	}
 }