fix: align mechanical dynamic port validation

app/simulation/registry.py

@@ -73,6 +73,16 @@ class ComponentModelSpec:
     def parameter_by_name(self) -> dict[str, ParameterDefinition]:
         return {parameter.name: parameter for parameter in self.parameters}
 
+    def active_ports(
+        self,
+        values: Mapping[str, float],
+    ) -> tuple[PortDefinition, ...]:
+        resolved = {
+            parameter.name: values.get(parameter.name, parameter.default)
+            for parameter in self.parameters
+        }
+        return self.component_class.active_port_definitions_for_parameters(resolved)
+
     def as_catalog_dict(self) -> dict[str, object]:
         category = self.library.category_by_id[self.display.category_id]
         display_ports = self.display.port_by_name