优化仿真求解性能并修复流量闭合问题（初版）

frontend/tests/e2e/component-symbols.spec.ts

@@ -2902,6 +2902,8 @@ test("恢复工程时采用当前目录端口并明确丢弃已删除端口的
 test("AMESim canvas nodes use icon anchors and highlight only compatible free ports", async ({
   page,
 }) => {
+  const pageErrors: string[] = [];
+  page.on("pageerror", (error) => pageErrors.push(error.message));
   await page.goto("/");
 
   const firstOrifice = await dragSymbolToCanvas(page, "amesim_pnor001", {
@@ -3214,6 +3216,39 @@ test("AMESim canvas nodes use icon anchors and highlight only compatible free po
   await expect(signalInput).toHaveCSS("opacity", "0");
   await expect(signalOutput).toHaveCSS("pointer-events", "none");
   await expect(signalInput).toHaveCSS("pointer-events", "none");
+
+  const renderedEdges = page.locator(".flow-canvas .react-flow__edge");
+  const clickEdgeMiddle = async (edgeIndex: number) => {
+    const point = await renderedEdges
+      .nth(edgeIndex)
+      .locator(".react-flow__edge-interaction")
+      .evaluate((path: SVGPathElement) => {
+        const localPoint = path.getPointAtLength(path.getTotalLength() / 2);
+        const matrix = path.getScreenCTM();
+        if (!matrix) {
+          throw new Error("Unable to resolve the edge screen position");
+        }
+        const screenPoint = new DOMPoint(
+          localPoint.x,
+          localPoint.y,
+        ).matrixTransform(matrix);
+        return { x: screenPoint.x, y: screenPoint.y };
+      });
+    await page.mouse.click(point.x, point.y);
+  };
+
+  await clickEdgeMiddle(0);
+  await expect(renderedEdges).toHaveCount(2);
+  await expect(renderedEdges.nth(0)).toHaveClass(
+    /selected|editor-edge-selected/,
+  );
+  await clickEdgeMiddle(1);
+  await expect(renderedEdges).toHaveCount(2);
+  await expect(renderedEdges.nth(1)).toHaveClass(
+    /selected|editor-edge-selected/,
+  );
+  await expect(page.getByText("System Simulation Flow", { exact: true })).toBeVisible();
+  expect(pageErrors).toEqual([]);
 });
 
 test("端口图标随画布缩小且物理端口始终保持标准圆形", async ({ page }) => {