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/arc-g2-g3.js

@@ -0,0 +1,14 @@
+export const arcG2G3Program = {
+  id: "arc-g2-g3",
+  label: "G2/G3 arc path",
+  category: "Arc",
+  text: [
+    "G90 G17 G0 X0 Y0 Z0",
+    "G91.1",
+    "G2 X1 Y1 I1 J0 F80",
+    "G3 X0 Y0 I0 J-1",
+    "M2",
+    "",
+  ].join("\n"),
+  expectedMotionTypes: ["STRAIGHT_TRAVERSE", "ARC_FEED"],
+};