Adjust UI install for offline pnpm fetch (#568)

* 🤖 codex: make ui build install prod deps for offline pnpm (issue-pnpm-offline)

* 🤖 codex: ensure ui:test installs dev deps (issue-pnpm-offline)

scripts/ui.js

@@ -64,21 +64,26 @@ function run(cmd, args) {
   });
 }
 
-function runSync(cmd, args) {
+function runSync(cmd, args, envOverride) {
   const result = spawnSync(cmd, args, {
     cwd: uiDir,
     stdio: "inherit",
-    env: process.env,
+    env: envOverride ?? process.env,
   });
   if (result.signal) process.exit(1);
   if ((result.status ?? 1) !== 0) process.exit(result.status ?? 1);
 }
 
-function depsInstalled() {
+function depsInstalled(kind) {
   try {
     const require = createRequire(path.join(uiDir, "package.json"));
     require.resolve("vite");
     require.resolve("dompurify");
+    if (kind === "test") {
+      require.resolve("vitest");
+      require.resolve("@vitest/browser-playwright");
+      require.resolve("playwright");
+    }
     return true;
   } catch {
     return false;
@@ -118,13 +123,29 @@ if (action !== "install" && !script) {
 if (runner.kind === "bun") {
   if (action === "install") run(runner.cmd, ["install", ...rest]);
   else {
-    if (!depsInstalled()) runSync(runner.cmd, ["install"]);
+    if (!depsInstalled(action === "test" ? "test" : "build")) {
+      const installEnv =
+        action === "build"
+          ? { ...process.env, NODE_ENV: "production" }
+          : process.env;
+      const installArgs =
+        action === "build" ? ["install", "--production"] : ["install"];
+      runSync(runner.cmd, installArgs, installEnv);
+    }
     run(runner.cmd, ["run", script, ...rest]);
   }
 } else {
   if (action === "install") run(runner.cmd, ["install", ...rest]);
   else {
-    if (!depsInstalled()) runSync(runner.cmd, ["install"]);
+    if (!depsInstalled(action === "test" ? "test" : "build")) {
+      const installEnv =
+        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]);
   }
 }