NFC-156 Fix user-initiated gesture requirement to continue signing flow

Author: aarmam

example/src/main/resources/templates/webeid-callback.html

@@ -25,6 +25,13 @@ <h2>Completing signing…</h2>
             <button id="back-button" class="btn btn-primary">Back</button>
         </p>
 
+        <div id="continue-actions" style="display: none">
+            <h2>Signing certificate received</h2>
+            <p class="text-center p-4">
+                <button id="continue-button" class="btn btn-primary">Continue signing</button>
+            </p>
+        </div>
+
         <script type="module">
             import { showErrorMessage, checkHttpError } from "/js/errors.js";
             import { parsePayload } from "/js/payload.js";
@@ -58,7 +65,12 @@ <h2>Completing signing…</h2>
                 const result = await response.json();
                 if (endpoint.endsWith("/certificate")) {
                     const { requestUri } = result;
-                    window.location.replace(requestUri);
+                    document.querySelector("#spinner-message").style.display = "none";
+                    const continueActions = document.getElementById("continue-actions");
+                    continueActions.style.display = "block";
+                    document.getElementById("continue-button").addEventListener("click", () => {
+                        window.location.replace(requestUri);
+                    });
                     return;
                 }