style(user-center): 卡密兑换弹窗按钮右对齐

assets/css/routes/user-center/credits.css

@@ -880,6 +880,12 @@ body.uc-modal-open {
 }
 .uc-card-pass__btn:hover { background: #1d4ed8; }
 .uc-card-pass__btn:disabled { opacity: .6; cursor: not-allowed; }
+/* Modal redeem action sits on the right */
+.uc-card-pass-actions {
+  display: flex;
+  justify-content: flex-end;
+  margin-top: 2px;
+}
 .uc-card-pass__tip {
   margin: 8px 0 0;
   font-size: 12px;