完善MECMAS21参数配置与分组交互

app/simulation/core/catalog.py

@@ -33,6 +33,26 @@ class PortDisplaySpec:
     order: int = 0
 
 
+@dataclass(frozen=True)
+class ParameterGroupDisplaySpec:
+    """Ordered, collapsible presentation group for component parameters."""
+
+    id: str
+    label: str
+    parameters: tuple[str, ...]
+    order: int = 0
+    default_expanded: bool = False
+
+    def as_catalog_dict(self) -> dict[str, object]:
+        return {
+            "id": self.id,
+            "label": self.label,
+            "parameters": list(self.parameters),
+            "order": self.order,
+            "defaultExpanded": self.default_expanded,
+        }
+
+
 @dataclass(frozen=True)
 class ComponentDisplaySpec:
     """Frontend metadata co-located with a component implementation."""
@@ -44,6 +64,7 @@ class ComponentDisplaySpec:
     ports: tuple[PortDisplaySpec, ...]
     order: int = 0
     role: ComponentCatalogRole | None = None
+    parameter_groups: tuple[ParameterGroupDisplaySpec, ...] = ()
 
     @property
     def port_by_name(self) -> dict[str, PortDisplaySpec]: