拆分仿真测试程序目录

结论：将内置 G-code 测试程序从 simulation-app.js 移入 runtime/ui/simulation/programs/，建立一程序一模块的目录化程序库，并保持页面 API 与验证 gate 兼容。

wasm-port/runtime/ui/simulation/programs/square-linear.js

@@ -0,0 +1,15 @@
+export const squareLinearProgram = {
+  id: "square-linear",
+  label: "Square contour",
+  category: "Linear",
+  text: [
+    "G90 G17 G0 X0 Y0 Z0",
+    "G1 X1 Y0 Z0 F100",
+    "G1 X1 Y1 Z0",
+    "G1 X0 Y1 Z0",
+    "G1 X0 Y0 Z0",
+    "M2",
+    "",
+  ].join("\n"),
+  expectedMotionTypes: ["STRAIGHT_TRAVERSE", "STRAIGHT_FEED"],
+};