Update app.py

app.py

@@ -5,6 +5,14 @@ from openai import OpenAI
 from collections import defaultdict
 import time
 
+# Loads keys from .env file when running locally
+# On HuggingFace/Colab the env vars are already set so this just does nothing
+try:
+    from dotenv import load_dotenv
+    load_dotenv()
+except ImportError:
+    pass  # dotenv not installed (HF/Colab don't need it)
+
 # ── Read keys from environment variables (never hardcode these!) ──
 API_KEYS = {
     "groq":        os.environ.get("GROQ_API_KEY"),