I need a secure voice-chat feature added to my existing web application. The goal is straightforward: authenticated users should be able to start, join, and leave real-time voice rooms directly from the browser. Key points • Web only—no mobile or desktop clients for now. • Voice chat, not text or video. • Existing sign-in flow is already in place; your job is to hook the voice layer into that system and confirm only logged-in users can transmit or listen. • You may use WebRTC, Twilio, Agora, or a similar proven solution, provided it works smoothly in Chrome, Firefox, and Edge. • Clear, well-documented code plus a short setup guide so I can redeploy it on staging and production. I’ll supply repo access and a brief tour of the current tech stack as soon as we start. If you have relevant live demos or recordings, link them in your bid so I can gauge audio quality and latency.