manager: display ids of guardians in shared custody agenda settings (#82957)

chrono/manager/templates/chrono/manager_shared_custody_agenda_settings.html

@@ -7,7 +7,16 @@
 {% endblock %}
 
 {% block appbar %}
-  <h2>{% trans "Settings" %}</h2>
+  <h2>
+    {% trans "Settings" %}
+    <span class="identifier">
+      [
+      {% trans "guardians identifiers:" %} {{ agenda.first_guardian.user_external_id }}, {{ agenda.second_guardian.user_external_id }}
+      /
+      {% trans "child identifier:" %} {{ agenda.child.user_external_id }}
+      ]
+    </span>
+  </h2>
   <span class="actions">
     {% if user.is_staff %}
       <a class="extra-actions-menu-opener"></a>

tests/manager/test_shared_custody_agenda.py

@@ -38,6 +38,8 @@ def test_shared_custody_agenda_settings_rules(app, admin_user):
     resp = app.get('/manage/shared-custody/%s/' % agenda.pk).follow()
     resp = resp.click('Settings')
     assert 'Custody agenda of John Doe and Jane Doe' in resp.text
+    assert 'guardians identifiers: father_id, mother_id' in resp.text
+    assert 'child identifier: child_id' in resp.text
     assert 'Custody rules are not complete.' in resp.text
     assert 'This agenda doesn\'t have any custody rules yet.' in resp.text