高温氦气物性补全；三通四通能量计算bug修正

frontend/tests/e2e/parameter-table.spec.ts

@@ -824,7 +824,7 @@ test("MECMAS21 旧的 0/1 编码不转换并阻止执行", async ({
 
   const changed = await page.evaluate(() => {
     const key = Object.keys(window.localStorage).find((candidate) =>
-      candidate.startsWith("system-simulation-flow:project:"),
+      candidate === "system-simulation-flow:autosave",
     );
     const raw = key ? window.localStorage.getItem(key) : null;
     if (!key || !raw) {
@@ -891,7 +891,7 @@ test("缺失模型版本加载时警告并补默认值，保存时升级当前
   await page.getByRole("button", { name: "保存工程", exact: true }).click();
   const changed = await page.evaluate(() => {
     const key = Object.keys(window.localStorage).find((candidate) =>
-      candidate.startsWith("system-simulation-flow:project:"),
+      candidate === "system-simulation-flow:autosave",
     );
     const raw = key ? window.localStorage.getItem(key) : null;
     if (!key || !raw) {
@@ -928,7 +928,7 @@ test("缺失模型版本加载时警告并补默认值，保存时升级当前
   await page.getByRole("button", { name: "保存工程", exact: true }).click();
   const persistedWithCurrentVersion = await page.evaluate(() => {
     const key = Object.keys(window.localStorage).find((candidate) =>
-      candidate.startsWith("system-simulation-flow:project:"),
+      candidate === "system-simulation-flow:autosave",
     );
     const raw = key ? window.localStorage.getItem(key) : null;
     if (!raw) {