Update app.py

app.py

@@ -136,7 +136,7 @@ def query(payload: Dict[str, Any], api_url: str) -> Optional[Dict[str, Any]]:
         
         response.raise_for_status()
         return response.json()
-    except Exception as e:
+    except requests.exceptions.JSONDecodeError as e:
         logger.error(f"API request failed: {str(e)}")
         raise