Update app.py

app.py

@@ -127,7 +127,11 @@ def render_message(history):
         function scrollToBottom() {
             var chatbox = document.getElementById('chatbox-container');
             var messages = document.getElementById('messages');
-            chatbox.scrollTop = messages.scrollHeight;  
+            var isAtBottom = chatbox.scrollHeight - chatbox.scrollTop === chatbox.clientHeight;
+            
+            if (isAtBottom) {
+                chatbox.scrollTop = messages.scrollHeight;
+            }
         }
 
         var targetNode = document.getElementById('messages');
@@ -139,6 +143,7 @@ def render_message(history):
 
         observer.observe(targetNode, observerOptions);
 
+        // Ensure scrolling happens on page load as well
         window.onload = function() {
             scrollToBottom();
         };