现有组件功能与Amesim组件比较对齐，补全功能；仿真服务启动环境检测，旧版json工程文件适配读取

frontend/tests/e2e/pnch012-parameters.spec.ts

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+import { expect, test } from "@playwright/test";
+import { componentCatalog, expandSimulationConsole, prepareApp, wideProject } from "./fixtures";
+
+const extraInputs = ["vol1", "vol2", "vol3", "vol4", "dvol1", "dvol2", "dvol3", "dvol4"];
+const chamber = {
+  type: "amesim_pnch012", modelType: "amesim_pnch012", modelVersion: "0.1.0",
+  label: "PNCH012 变容气室", symbol: "amesim_pnch012", order: 99,
+  category: { id: "storage", label: "储能元件", order: 20 },
+  ports: Array.from({ length: 4 }, (_, index) => ({ ...wideProject.nodes[0].data.ports[index % 2],
+    name: `port_${index + 1}`, order: index })),
+  parameters: [
+    { name: "gi", label: "气体类型索引", default: 1, quantity: "dimensionless", unit: "" },
+    { name: "cvol0", label: "死容积", default: 0.015, quantity: "volume", unit: "m3" },
+    { name: "kth", label: "换热系数", default: 0, quantity: "heat_transfer_coefficient", unit: "W/(m2*K)" },
+    { name: "sth", label: "换热面积", default: 0.1, quantity: "area", unit: "m2" },
+    { name: "extemp", label: "外部温度", default: 293.15, quantity: "temperature", unit: "K" },
+    { name: "p0", label: "初始压力", default: 100000, quantity: "pressure", unit: "Pa" },
+    { name: "T0", label: "初始温度", default: 293.15, quantity: "temperature", unit: "K" },
+    ...extraInputs.map(name => ({ name, label: `端口 ${name.at(-1)} ${name.startsWith("d") ? "容积变化率" : "外部容积"}`,
+      default: 0, quantity: name.startsWith("d") ? "volume_flow" : "volume", unit: name.startsWith("d") ? "m3/s" : "m3" })),
+  ],
+};
+
+test.beforeEach(async ({ page }) => {
+  await prepareApp(page);
+  await page.route("**/api/components/catalog", route => route.fulfill({ json: {
+    ...componentCatalog, libraries: [{ ...componentCatalog.libraries[1], components: [chamber] }],
+  } }));
+  await page.goto("/");
+  await expect(page.getByRole("button", { name: chamber.label, exact: true })).toBeVisible();
+});
+
+test("PNCH012 新元件仅展示 Amesim 设置，端口容积输入默认仍为零", async ({ page }) => {
+  await page.getByRole("button", { name: chamber.label, exact: true }).dragTo(page.locator(".flow-canvas .react-flow__pane"));
+  const table = page.getByRole("table", { name: "组件参数", exact: true });
+  for (const parameter of chamber.parameters.slice(0, 7)) {
+    await expect(table.getByRole("rowheader", { name: parameter.label, exact: true })).toBeVisible();
+  }
+  for (const parameter of chamber.parameters.slice(7)) {
+    await expect(table.getByRole("rowheader", { name: parameter.label, exact: true })).toHaveCount(0);
+  }
+  await page.getByRole("button", { name: "保存工程", exact: true }).click();
+  const parameters = await page.evaluate(() => JSON.parse(localStorage.getItem("system-simulation-flow:autosave")!).nodes[0].data.parameters);
+  for (const name of extraInputs) expect(parameters[name]).toBe(0);
+});
+
+test("隐藏端口输入不清除旧工程的非零值或表达式，保存导出及 XML 保持原值", async ({ page }) => {
+  const parameters = { ...Object.fromEntries(chamber.parameters.map(parameter => [parameter.name, parameter.default])),
+    vol1: 0.00123, vol2: "2*0.0001", dvol1: 0.0000042 };
+  const node = { ...wideProject.nodes[0], id: "chamber_1", data: { ...wideProject.nodes[0].data,
+    componentType: chamber.type, modelType: chamber.modelType, modelVersion: chamber.modelVersion,
+    ports: chamber.ports, parameters,
+    parameterUnits: Object.fromEntries(chamber.parameters.map(parameter => [parameter.name, parameter.unit])),
+  } };
+  await page.locator('input[type="file"]').setInputFiles({ name: "old-chamber.json", mimeType: "application/json",
+    buffer: Buffer.from(JSON.stringify({ ...wideProject, nodes: [node], edges: [] })) });
+  await page.locator('.flow-canvas .react-flow__node[data-id="chamber_1"]').click();
+  for (const parameter of chamber.parameters.slice(7)) {
+    await expect(page.getByRole("table", { name: "组件参数", exact: true }).getByRole("rowheader", { name: parameter.label, exact: true })).toHaveCount(0);
+  }
+  await page.getByRole("button", { name: "保存工程", exact: true }).click();
+  await page.getByRole("button", { name: "加载工程", exact: true }).click();
+  const downloadPromise = page.waitForEvent("download");
+  await page.getByRole("button", { name: "导出工程 JSON", exact: true }).click();
+  const stream = await (await downloadPromise).createReadStream();
+  if (!stream) throw new Error("没有导出的工程");
+  const chunks: Buffer[] = [];
+  for await (const chunk of stream) chunks.push(Buffer.from(chunk));
+  expect(JSON.parse(Buffer.concat(chunks).toString()).nodes[0].data.parameters).toEqual(parameters);
+  await page.getByRole("button", { name: "生成系统 XML", exact: true }).click();
+  await expandSimulationConsole(page);
+  const xml = page.getByLabel("生成的系统 XML").last();
+  await expect(xml).toContainText('name="vol1" value="0.00123"');
+  await expect(xml).toContainText('name="vol2" value="0.0002"');
+  await expect(xml).toContainText('name="dvol1" value="0.0000042"');
+});