docs: document voice provider configuration and local defaults

packages/website/src/routes/docs/index.tsx

@@ -87,14 +87,16 @@ function GettingStarted() {
       <section className="space-y-4">
         <h2 className="text-xl font-medium">Voice Setup</h2>
         <p className="text-white/60">
-          Voice features currently require an OpenAI API key. Set it as an environment variable before running the server:
+          Voice supports two providers: local (default) and OpenAI. Local uses ONNX models and will
+          download missing model files automatically at daemon startup.
         </p>
         <div className="bg-card border border-border rounded-lg p-4 font-mono text-sm">
           <span className="text-muted-foreground select-none">$ </span>
           <span>export OPENAI_API_KEY=your-key-here</span>
         </div>
         <p className="text-white/60">
-          Local voice support is coming soon.
+          Set <code className="font-mono">OPENAI_API_KEY</code> if you want OpenAI speech providers.
+          For local defaults and model presets, see Configuration.
         </p>
       </section>