fix: align mechanical dynamic port validation

app/system_xml.py

@@ -538,6 +538,21 @@ def _registered_port(
         return None
     return next((port for port in spec.ports if port.name == port_name), None)
 
+def _active_registered_ports(
+    component: SystemXmlComponent,
+) -> tuple[PortDefinition, ...]:
+    spec = COMPONENT_MODEL_REGISTRY.get(component.model_type)
+    if spec is None:
+        return ()
+    values = {
+        parameter.name: parameter.value
+        for parameter in component.parameters
+    }
+    try:
+        return spec.active_ports(values)
+    except (KeyError, ValueError):
+        return ()
+
 
 def _validate_connections(
     document: SystemXmlDocument,
@@ -615,6 +630,17 @@ def _validate_connections(
                     )
                 )
                 continue
+            if port not in _active_registered_ports(component):
+                issues.append(
+                    _semantic_issue(
+                        "ENDPOINT_PORT_INACTIVE",
+                        f"Connection {connection.id} references inactive port "
+                        f"{endpoint.component}.{endpoint.port} for its parameters.",
+                        endpoint_path,
+                        endpoint.line,
+                    )
+                )
+                continue
             resolved_endpoints.append((endpoint, port))
             referenced_ports.add(endpoint.key)
             if port.kind == "physical":
@@ -696,7 +722,7 @@ def _validate_connections(
         spec = COMPONENT_MODEL_REGISTRY.get(component.model_type)
         if spec is None:
             continue
-        for port in spec.ports:
+        for port in _active_registered_ports(component):
             if (component.id, port.name) not in referenced_ports:
                 issues.append(
                     _semantic_issue(