fix: Correct chat auto-scroll to bottom by setting container's scrollTop property instead of using scrollIntoView.

src/app/support/chat/page.tsx

@@ -138,9 +138,12 @@ export default function SupportChatPage() {
     };
   }, [chat, currentUserId]);
 
-  // Auto-scroll to bottom on new messages
+  // Auto-scroll to bottom on new messages (scroll container, not page)
   useEffect(() => {
-    messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
+    const container = messagesContainerRef.current;
+    if (container) {
+      container.scrollTop = container.scrollHeight;
+    }
   }, [messages]);
 
   // Send message