Fix POE_API_KEY error handling - require env variable

pumpkin_code.py

@@ -39,9 +39,10 @@ logger = logging.getLogger(__name__)
 #  CONFIGURATION
 # ========================
 
-POE_API_KEY = os.getenv("POE_API_KEY") or "BZyOjKtDmmX7Day-BGjIIAcPmqozr-cRY5V3ZrDDj5Q"
-if POE_API_KEY == "BZyOjKtDmmX7Day-BGjIIAcPmqozr-cRY5V3ZrDDj5Q":
-    logger.warning("Using fallback POE_API_KEY. Set POE_API_KEY environment variable for production.")
+POE_API_KEY = os.getenv("POE_API_KEY")
+if not POE_API_KEY:
+    logger.error("POE_API_KEY environment variable not set!")
+    raise ValueError("POE_API_KEY environment variable is required. Please set it in HuggingFace Space Secrets.")
 
 BASE_URL = "https://api.poe.com/v1"