api/firebase_firestore.py

from firebase_admin import firestore

def save_chat(user_id: str, user_input: str, ai_response: str):
    db = firestore.client()
    db.collection("chats").add({
        "user_id": user_id,
        "input": user_input,
        "response": ai_response,
        "timestamp": firestore.SERVER_TIMESTAMP
    })