From 6f590a7fcd217483b57a6704322031e15b7ce5de Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=AD=8F=E5=AE=B6=E5=AE=B6?= <133336217@qq.com>
Date: Mon, 10 Aug 2026 15:08:30 +0800
Subject: [PATCH] Update logic-hooks.ts (#15194)

Empty reply configured in knowledge base chat, no content returned when
matched empty content

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

Co-authored-by: Jin Hai <haijin.chn@gmail.com>
---
 web/src/hooks/logic-hooks.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/web/src/hooks/logic-hooks.ts b/web/src/hooks/logic-hooks.ts
index c329e3c3d5..816da3fb1b 100644
--- a/web/src/hooks/logic-hooks.ts
+++ b/web/src/hooks/logic-hooks.ts
@@ -300,6 +300,9 @@ export const useSendMessageWithSse = () => {
                 if (typeof d !== 'boolean') {
                   setAnswer((prev) => {
                     const prevAnswer = prev.answer || '';
+                    // Skip final-chunk answer only when prior stream chunks exist (avoids duplicate).
+                    // Empty-response and other single-shot answers arrive with final=true only.
+                    // const currentAnswer = d.final ? '' : d.answer || '';
                     const currentAnswer =
                       d.final && prevAnswer ? '' : d.answer || '';