Merge pull request 'Guard nil confirm card in surface action dispatcher' (#173) from fix/surface-action-nil-card into main

internal/app/app.go

@@ -535,7 +535,11 @@ func Run(opt Options) error {
 		if resp.Receipt.State != "" {
 			state = string(resp.Receipt.State)
 		}
-		return surfacesvc.ActionOutcome{State: state, CardID: resp.Card.ID, Receipt: resp.Receipt, Payload: resp.Payload}, nil
+		cardID := ""
+		if resp.Card != nil {
+			cardID = string(resp.Card.ID)
+		}
+		return surfacesvc.ActionOutcome{State: state, CardID: cardID, Receipt: resp.Receipt, Payload: resp.Payload}, nil
 	})
 	// U3：generative-ui 工具注入闸——activation 台账关闭时命令不投影给该 owner
 	// 的模型（禁用即不注入能力；执行端守卫仍在 surfacesvc）。