高温氦气物性补全；三通四通能量计算bug修正

frontend/tests/e2e/connection-draft.spec.ts

@@ -3,7 +3,7 @@ import { Position } from "@xyflow/react";
 import { componentCatalog, expectAllNodesInsideCanvas, prepareApp, wideProject } from "./fixtures";
 import { confirmOrthogonalCorner, extendOrthogonalRoute } from "../../src/edgeRouting";
 
-const PROJECT_KEY = "system-simulation-flow:project:demo-system";
+const PROJECT_KEY = "system-simulation-flow:autosave";
 
 test("每次左键只确认一段并转向，空白预览不插入自动中点", () => {
   const source = { x: 0, y: 0 };