fix(tenancy): use correct block name for merchant team page scripts

Template used {% block scripts %} but merchant base.html defines
{% block extra_scripts %}. The merchantTeam() function never rendered,
causing "merchantTeam is not defined" errors.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/tenancy/templates/tenancy/merchant/team.html

@@ -117,7 +117,7 @@
 </div>
 {% endblock %}
 
-{% block scripts %}
+{% block extra_scripts %}
 <script>
 function merchantTeam() {
     return {