Support single-value FQDN in "open" button

src/servala/core/models/service.py

@@ -961,5 +961,21 @@ class ServiceInstance(ServalaModelMixin, models.Model):
         except Exception as e:
             return {"error": str(e)}
 
+    @property
+    def fqdn_url(self):
+        try:
+            fqdn = self.spec.get("parameters", {}).get("service", {}).get("fqdn")
+            if not fqdn:
+                return None
+
+            if isinstance(fqdn, list):
+                return fqdn[0]
+            elif isinstance(fqdn, str):
+                return fqdn
+            else:
+                return None
+        except (AttributeError, KeyError, IndexError):
+            return None
+
 
 auditlog.register(ServiceInstance, exclude_fields=["updated_at"], serialize_data=True)

src/servala/frontend/templates/frontend/organizations/service_instance_detail.html

@@ -7,8 +7,8 @@
 {% endblock html_title %}
 {% block page_title_extra %}
     <div>
-        {% if instance.spec.parameters.service.fqdn %}
-            <a href="https://{{ instance.spec.parameters.service.fqdn.0 }}"
+        {% if instance.fqdn_url %}
+            <a href="https://{{ instance.fqdn_url }}"
                target="_blank"
                rel="noopener noreferrer"
                class="btn btn-success me-1 mb-1">