diff --git a/scripts/ui.js b/scripts/ui.js
index 5f6c753f4e2..51966c6444f 100644
--- a/scripts/ui.js
+++ b/scripts/ui.js
@@ -11,7 +11,9 @@ const uiDir = path.join(repoRoot, "ui");
 
 function usage() {
   // keep this tiny; it's invoked from npm scripts too
-  process.stderr.write("Usage: node scripts/ui.js <install|dev|build|test> [...args]\n");
+  process.stderr.write(
+    "Usage: node scripts/ui.js <install|dev|build|test> [...args]\n",
+  );
 }
 
 function which(cmd) {
@@ -22,11 +24,16 @@ function which(cmd) {
       .filter(Boolean);
     const extensions =
       process.platform === "win32"
-        ? (process.env.PATHEXT ?? ".EXE;.CMD;.BAT;.COM").split(";").filter(Boolean)
+        ? (process.env.PATHEXT ?? ".EXE;.CMD;.BAT;.COM")
+            .split(";")
+            .filter(Boolean)
         : [""];
     for (const entry of paths) {
       for (const ext of extensions) {
-        const candidate = path.join(entry, process.platform === "win32" ? `${cmd}${ext}` : cmd);
+        const candidate = path.join(
+          entry,
+          process.platform === "win32" ? `${cmd}${ext}` : cmd,
+        );
         try {
           if (fs.existsSync(candidate)) {
             return candidate;
@@ -51,24 +58,31 @@ function resolveRunner() {
 }
 
 function run(cmd, args) {
+  const isWindows = process.platform === "win32"; // Windows support
   const child = spawn(cmd, args, {
     cwd: uiDir,
     stdio: "inherit",
     env: process.env,
+    shell: isWindows,
   });
-  child.on("exit", (code, signal) => {
-    if (signal) {
-      process.exit(1);
+  child.on("error", (err) => {
+    console.error(`Failed to launch ${cmd}:`, err);
+    process.exit(1);
+  });
+  child.on("exit", (code) => {
+    if (code !== 0) {
+      process.exit(code ?? 1);
     }
-    process.exit(code ?? 1);
   });
 }
 
 function runSync(cmd, args, envOverride) {
+  const isWindows = process.platform === "win32"; // Windows support
   const result = spawnSync(cmd, args, {
     cwd: uiDir,
     stdio: "inherit",
     env: envOverride ?? process.env,
+    shell: isWindows,
   });
   if (result.signal) {
     process.exit(1);
@@ -127,8 +141,11 @@ if (action === "install") {
 } else {
   if (!depsInstalled(action === "test" ? "test" : "build")) {
     const installEnv =
-      action === "build" ? { ...process.env, NODE_ENV: "production" } : process.env;
-    const installArgs = action === "build" ? ["install", "--prod"] : ["install"];
+      action === "build"
+        ? { ...process.env, NODE_ENV: "production" }
+        : process.env;
+    const installArgs =
+      action === "build" ? ["install", "--prod"] : ["install"];
     runSync(runner.cmd, installArgs, installEnv);
   }
   run(runner.cmd, ["run", script, ...rest]);