前端进度条性能优化、仿真结束后后处理优化；后端C代码生成流程优化：先识别来源，再按照已知未知量需求排序，最后局部求解

frontend/tests/e2e/edge-interactions.spec.ts

@@ -130,7 +130,6 @@ test("多选块拖动会即时断开边界接触，并由块内空闲端口整
   page,
 }) => {
   await page.goto("/");
-  await page.getByRole("button", { name: "关闭网格吸附", exact: true }).click();
 
   const fixedNode = await dragGenericToCanvas(page, { x: 150, y: 180 });
   const firstMovingNode = await dragGenericToCanvas(page, { x: 410, y: 180 });
@@ -211,7 +210,6 @@ test("复制块保留内部连接，同时未连接端口仍参与待放置吸
   page,
 }) => {
   await page.goto("/");
-  await page.getByRole("button", { name: "关闭网格吸附", exact: true }).click();
 
   const first = await dragGenericToCanvas(page, { x: 170, y: 180 });
   const second = await dragGenericToCanvas(page, { x: 410, y: 370 });