fix: treat Windows platform labels as Windows for node shell (#1760)

Thanks @ymat19.

Co-authored-by: ymat19 <45934497+ymat19@users.noreply.github.com>

src/infra/node-shell.test.ts

@@ -0,0 +1,40 @@
+import { describe, expect, it } from "vitest";
+
+import { buildNodeShellCommand } from "./node-shell.js";
+
+describe("buildNodeShellCommand", () => {
+  it("uses cmd.exe for win32", () => {
+    expect(buildNodeShellCommand("echo hi", "win32")).toEqual([
+      "cmd.exe",
+      "/d",
+      "/s",
+      "/c",
+      "echo hi",
+    ]);
+  });
+
+  it("uses cmd.exe for windows labels", () => {
+    expect(buildNodeShellCommand("echo hi", "windows")).toEqual([
+      "cmd.exe",
+      "/d",
+      "/s",
+      "/c",
+      "echo hi",
+    ]);
+    expect(buildNodeShellCommand("echo hi", "Windows 11")).toEqual([
+      "cmd.exe",
+      "/d",
+      "/s",
+      "/c",
+      "echo hi",
+    ]);
+  });
+
+  it("uses /bin/sh for darwin", () => {
+    expect(buildNodeShellCommand("echo hi", "darwin")).toEqual(["/bin/sh", "-lc", "echo hi"]);
+  });
+
+  it("uses /bin/sh when platform missing", () => {
+    expect(buildNodeShellCommand("echo hi")).toEqual(["/bin/sh", "-lc", "echo hi"]);
+  });
+});