Better error management.

* "Uncooperative cards" is now a warning.
* Cards and actions get "Then" invoked before the card processor considers erroring out.
* Terminal UI: Errors and warnings from actions are displayed during the response; they're not only added to the temporary messages now.

cardsim/terminalui.go

@@ -46,6 +46,10 @@ func RunSimpleTerminalUI[C StatsCollection](p *Player[C]) error {
 				}
 				continue
 			}
+			if err != nil {
+				display(ErrorMessage(err))
+				display(MsgStr(""))
+			}
 			display(msg)
 			wait()
 		}