From d210d0e44e147e20f5d54241c3f00d1987bb68ec Mon Sep 17 00:00:00 2001
From: "dayuan.jiang" <jdy.toh@gmail.com>
Date: Fri, 10 Apr 2026 10:56:52 +0900
Subject: [PATCH] fix: add trailing edge to scroll throttle

Ensures the chat scrolls to the bottom after streaming ends, even if
the last messages update arrives during the 150ms throttle window.
---
 components/chat-message-display.tsx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/components/chat-message-display.tsx b/components/chat-message-display.tsx
index 717296d..ada6ae5 100644
--- a/components/chat-message-display.tsx
+++ b/components/chat-message-display.tsx
@@ -432,10 +432,14 @@ export function ChatMessageDisplay({
             }
 
             // Throttle scroll during streaming to avoid layout thrashing
+            // Leading + trailing: scroll immediately, then once more after cooldown
             if (!scrollThrottleRef.current) {
                 messagesEndRef.current.scrollIntoView({ behavior: "smooth" })
                 scrollThrottleRef.current = setTimeout(() => {
                     scrollThrottleRef.current = null
+                    messagesEndRef.current?.scrollIntoView({
+                        behavior: "smooth",
+                    })
                 }, 150)
             }
         }