The chat screens of my Firebase-hosted site are fully designed in Firebase Studio and already live; user authentication is working perfectly. What I still need is the wiring that turns those static screens into a true, real-time one-to-one conversation. Here is the scope: • Create the required message and conversation collections in Cloud Firestore (or Realtime Database if you prefer) and apply security rules so only the two authenticated participants can read or write. • Add front-end logic that sends each message to the database and listens for live updates, instantly refreshing the UI. • Keep all existing layouts, styles, and responsive behavior untouched—just plug in the data flow. Out of scope for the first milestone: push notifications, presence indicators, and group rooms. Once the core chat is solid we can discuss those as follow-ups. You will receive repo access, the live Firebase project, and a short Loom showing current state. When you finish, I’ll test in two separate browsers under different accounts; if both can exchange messages in real time and the rules pass the Firebase emulator tests, the job is done. Let me know your estimated turnaround and any questions before we start.