refactor: replace welcome message with server_info status payload

Unify the initial connection handshake and capability update paths.
The server now sends a server_info status message on connect and
whenever capabilities change, enabling the onboarding flow where
voice becomes available after models are configured.

packages/desktop/scripts/build-managed-runtime.mjs

@@ -213,6 +213,18 @@ function runCommand(command, args, options = {}) {
   return result;
 }
 
+function withManagedRuntimeNodeOptions(env = process.env) {
+  const existing = env.NODE_OPTIONS?.trim() ?? "";
+  if (existing.includes("--max-old-space-size")) {
+    return env;
+  }
+  const nodeOptions = existing ? `${existing} --max-old-space-size=8192` : "--max-old-space-size=8192";
+  return {
+    ...env,
+    NODE_OPTIONS: nodeOptions,
+  };
+}
+
 async function extractNodeDistribution(archivePath, nodeArtifact) {
   const extractionRoot = await fs.mkdtemp(path.join(os.tmpdir(), "paseo-managed-runtime-node-"));
   if (nodeArtifact.extension === "zip") {
@@ -260,6 +272,7 @@ async function packWorkspace(packageRoot, tarballRoot) {
     tarballRoot,
   ], {
     cwd: packageRoot,
+    env: withManagedRuntimeNodeOptions(process.env),
   });
   const [{ filename }] = JSON.parse(result.stdout.trim());
   if (!filename) {

packages/desktop/scripts/validate-managed-runtime.mjs

@@ -55,8 +55,28 @@ for (const pkg of ["@getpaseo/relay", "@getpaseo/server", "@getpaseo/cli"]) {
   });
 }
 
+const sherpaPlatformMap = {
+  darwin: "darwin",
+  linux: "linux",
+  win32: "win",
+};
+const sherpaPlatform = sherpaPlatformMap[manifest.platform];
+assert.ok(
+  sherpaPlatform,
+  `Unsupported sherpa platform mapping for managed runtime validation: ${manifest.platform}`
+);
+
+const sherpaNativePackage = `sherpa-onnx-${sherpaPlatform}-${manifest.arch}`;
+const sherpaNativePackageDir = path.join(runtimeRoot, "node_modules", sherpaNativePackage);
+await fs.access(sherpaNativePackageDir).catch(() => {
+  throw new Error(
+    `Missing bundled native speech dependency: ${sherpaNativePackage} (expected at ${sherpaNativePackageDir})`
+  );
+});
+
 console.log(`[validate-managed-runtime] PASS`);
 console.log(`  runtimeId: ${manifest.runtimeId}`);
 console.log(`  version: ${expectedVersion}`);
 console.log(`  platform: ${manifest.platform}`);
 console.log(`  arch: ${manifest.arch}`);
+console.log(`  sherpaNativePackage: ${sherpaNativePackage}`);