Fix API key authentication for InferenceClientModel

app.py

@@ -53,8 +53,13 @@ from tools.final_answer import FinalAnswerTool as FinalAnswer
 
 
 
+# Authenticate with Hugging Face using HF_TOKEN from environment
+if hf_token := os.getenv('HF_TOKEN'):
+    login(hf_token)
+
 model = InferenceClientModel(
 model_id='Qwen/Qwen3-Next-80B-A3B-Thinking',
+    api_key=os.getenv('HF_TOKEN'),
 )
 
 web_search = WebSearch()