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import os import uuid from collections import deque from flask import Flask, request, jsonify, send_from_directory, make_response from dotenv import load_dotenv from openai import OpenAI # ── Load environment ─────────────────────────────────────────────────────────── load_dotenv() OPENAI_API_KEY = os.getenv("OPENAI_API_KEY", "") MODEL = os.getenv("OPENAI_MODEL", "gpt-5") PORT = int(os.getenv("PORT", "8080")) if not OPENAI_API_KEY: raise RuntimeError("Missing OPENAI_API_KEY in .env") # ── OpenAI client ───────────────────────────────────