Update frontend.py

frontend.py

@@ -6,8 +6,8 @@ history = []
 
 def calculate(expression):
     try:
-        # Use relative URL, which works both locally and on Hugging Face Spaces
-        api_url = "/calculate"
+        # Use the current page's path as the API endpoint
+        api_url = "calculate"
         
         response = requests.post(api_url, json={"expr": expression})
         if response.status_code == 200: