完善端口标号与MECMAS21动态图标

frontend/tests/e2e/modeling-actions.spec.ts

@@ -20,6 +20,12 @@ test("未知图形元件使用带端口和名称的默认节点，并将动作
   await expect(node.locator(".node-symbol-anchor")).toHaveCount(0);
   await expect(node.locator(".node-label")).toHaveText("generic_sensor_1");
   await expect(node.locator(".port-handle")).toHaveCount(2);
+  await expect(
+    node.locator('.port-index-label[data-port-name="port_a"]'),
+  ).toHaveText("1");
+  await expect(
+    node.locator('.port-index-label[data-port-name="port_b"]'),
+  ).toHaveText("2");
 
   const consolePanel = page.getByRole("complementary", {
     name: "仿真控制台",