v2: initial commit — TTS proxy with STT fallback to whisper.cpp

- OpenAI-compatible API on localhost:9998
- TTS → RouterAI /v1/audio/speech (Google Gemini Flash)
- STT → RouterAI → whisper.cpp fallback
- Health endpoint, CORS, config from openclaw.json
- systemd service unit

roko-voice-proxy.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Roko Voice Proxy (RouterAI TTS/STT bridge)
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/node /home/openclaw/.openclaw/routerai-voice-proxy.js
+Restart=always
+RestartSec=5
+Environment=NODE_ENV=production
+
+[Install]
+WantedBy=default.target