fix(web): align dev server node runtime

scripts/dev-server-command.mjs

@@ -0,0 +1,11 @@
+export function createChatlabServeCommand({ serverDir, backendPort, nodeExecutable = process.execPath }) {
+  return {
+    command: nodeExecutable,
+    args: ['--watch', '--import', 'tsx', 'src/cli.ts', 'serve', '--port', String(backendPort)],
+    options: {
+      cwd: serverDir,
+      stdio: ['ignore', 'pipe', 'pipe'],
+      env: { ...process.env },
+    },
+  }
+}