Remove more usages of |safe (#6363)

* Replace |safe with |escapejson where appropriate
* Use JSON encoding for data-replace-with-qr

src/pretix/plugins/stripe/static/pretixplugins/stripe/pretix-stripe.js

@@ -323,7 +323,7 @@ $(function () {
             }
         }
     } else if ($("#stripe_payment_intent_next_action_redirect_url").length) {
-        let payment_intent_next_action_redirect_url = $.trim($("#stripe_payment_intent_next_action_redirect_url").html());
+        let payment_intent_next_action_redirect_url = JSON.parse($("#stripe_payment_intent_next_action_redirect_url").html());
         pretixstripe.handlePaymentRedirectAction(payment_intent_next_action_redirect_url);
     } else if ($.trim($("#stripe_payment_intent_action_type").html()) === "promptpay_display_qr_code") {
         waitingDialog.hide();
@@ -432,4 +432,4 @@ $(function () {
             }
         }
     );
-});
+});

src/pretix/plugins/stripe/templates/pretixplugins/stripe/sca.html

@@ -9,7 +9,7 @@
     <script type="text/plain" id="stripe_payment_intent_action_type">{{ payment_intent_action_type }}</script>
     <script type="text/plain" id="stripe_payment_intent_client_secret">{{ payment_intent_client_secret }}</script>
     {% if payment_intent_next_action_redirect_url %}
-        <script type="text/plain" id="stripe_payment_intent_next_action_redirect_url">{{ payment_intent_next_action_redirect_url|safe }}</script>
+        {{ payment_intent_next_action_redirect_url|json_script:"stripe_payment_intent_next_action_redirect_url" }}
     {% endif %}
     {% if payment_intent_redirect_action_handling %}
         <script type="text/plain" id="stripe_payment_intent_redirect_action_handling">{{ payment_intent_redirect_action_handling }}</script>