fix(windows): resolve cmd handoff path

src/cli/update-cli/restart-helper.test.ts

@@ -4,6 +4,7 @@ import fs from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
 import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { getWindowsCmdExePath } from "../../infra/windows-install-roots.js";
 import { prepareRestartScript, runRestartScript } from "./restart-helper.js";
 
 vi.mock("node:child_process", async () => {
@@ -616,7 +617,7 @@ exit 0
 
       await runRestartScript(scriptPath);
 
-      expect(spawn).toHaveBeenCalledWith("cmd.exe", ["/d", "/s", "/c", scriptPath], {
+      expect(spawn).toHaveBeenCalledWith(getWindowsCmdExePath(), ["/d", "/s", "/c", scriptPath], {
         detached: true,
         stdio: "ignore",
         windowsHide: true,
@@ -633,11 +634,15 @@ exit 0
 
       await runRestartScript(scriptPath);
 
-      expect(spawn).toHaveBeenCalledWith("cmd.exe", ["/d", "/s", "/c", `"${scriptPath}"`], {
-        detached: true,
-        stdio: "ignore",
-        windowsHide: true,
-      });
+      expect(spawn).toHaveBeenCalledWith(
+        getWindowsCmdExePath(),
+        ["/d", "/s", "/c", `"${scriptPath}"`],
+        {
+          detached: true,
+          stdio: "ignore",
+          windowsHide: true,
+        },
+      );
     });
 
     it("does not throw when spawn fails synchronously", async () => {

src/cli/update-cli/restart-helper.ts

@@ -16,6 +16,7 @@ import {
   resolveGatewayRestartLogPath,
   shellEscapeRestartLogValue,
 } from "../../daemon/restart-logs.js";
+import { getWindowsCmdExePath } from "../../infra/windows-install-roots.js";
 
 /**
  * Shell-escape a string for embedding in single-quoted shell arguments.
@@ -404,7 +405,7 @@ exit $status
  */
 export async function runRestartScript(scriptPath: string): Promise<void> {
   const isWindows = process.platform === "win32";
-  const file = isWindows ? "cmd.exe" : "/bin/sh";
+  const file = isWindows ? getWindowsCmdExePath() : "/bin/sh";
   const args = isWindows ? ["/d", "/s", "/c", quoteCmdScriptArg(scriptPath)] : [scriptPath];
 
   try {