Integrate MAS with Synapse

mas/share/templates/components/logout.html

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+{#
+Copyright 2024, 2025 New Vector Ltd.
+Copyright 2022-2024 The Matrix.org Foundation C.I.C.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE files in the repository root for full details.
+-#}
+
+{% macro button(text, csrf_token, as_link=false, post_logout_action={}) %}
+  <form method="POST" action="{{ "/logout" | prefix_url }}" class="inline-flex">
+    <input type="hidden" name="csrf" value="{{ csrf_token }}" />
+    {% for key, value in post_logout_action|items %}
+      <input type="hidden" name="{{ key }}" value="{{ value }}" />
+    {% endfor %}
+    {% if as_link %}
+      <button class="cpd-link flex-1" data-kind="critical" type="submit">{{ text }}</button>
+    {% else %}
+      <button class="cpd-button destructive flex-1" data-kind="secondary" data-size="lg" type="submit">{{ text }}</button>
+    {% endif %}
+  </form>
+{% endmacro %}