Update app.py

app.py

@@ -403,7 +403,10 @@ print(label_info)
 classifier = pipeline("zero-shot-classification", model="knowledgator/comprehend_it-base")
 client = InferenceClient("huggingchat/pdf-to-markdown")
 import os
-os.environ["GROQ_API_KEY"] = os.environ.get("GROQ_API_KEY")
+groq_api_key = os.environ.get("GROQ_API_KEY")
+if not isinstance(groq_api_key, str):
+    raise EnvironmentError("GROQ_API_KEY not found. Please add it to Hugging Face Space secrets.")
+os.environ["GROQ_API_KEY"] = groq_api_key
 
 
 phi_agent = Agent(