From dbf8cd40d3b263440caf2dd890049fbf00c4442b Mon Sep 17 00:00:00 2001
From: Pavel Fediushin <fedushin.pavel@gmail.com>
Date: Wed, 18 Feb 2026 08:53:22 +0700
Subject: [PATCH] =?UTF-8?q?=F0=9F=AA=B9=20fix:=20Prevent=20whitespace-only?=
 =?UTF-8?q?=20Chat=20input=20Submissions=20(#11838)?=
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fix(input): normalize chat input text before submit

Trim input text before checking if empty to show submit button as disabled
---
 client/src/components/Chat/Input/SendButton.tsx | 3 ++-
 client/src/hooks/Chat/useChatFunctions.ts       | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/client/src/components/Chat/Input/SendButton.tsx b/client/src/components/Chat/Input/SendButton.tsx
index 14c21f0586..a07e574928 100644
--- a/client/src/components/Chat/Input/SendButton.tsx
+++ b/client/src/components/Chat/Input/SendButton.tsx
@@ -41,7 +41,8 @@ const SubmitButton = React.memo(
 const SendButton = React.memo(
   forwardRef((props: SendButtonProps, ref: React.ForwardedRef<HTMLButtonElement>) => {
     const data = useWatch({ control: props.control });
-    return <SubmitButton ref={ref} disabled={props.disabled || !data.text} />;
+    const content = data?.text?.trim();
+    return <SubmitButton ref={ref} disabled={props.disabled || !content} />;
   }),
 );
 
diff --git a/client/src/hooks/Chat/useChatFunctions.ts b/client/src/hooks/Chat/useChatFunctions.ts
index 30465fc2e5..7cf8c6bf25 100644
--- a/client/src/hooks/Chat/useChatFunctions.ts
+++ b/client/src/hooks/Chat/useChatFunctions.ts
@@ -97,6 +97,8 @@ export default function useChatFunctions({
   ) => {
     setShowStopButton(false);
     resetLatestMultiMessage();
+
+    text = text.trim();
     if (!!isSubmitting || text === '') {
       return;
     }
@@ -134,7 +136,6 @@ export default function useChatFunctions({
 
     // construct the query message
     // this is not a real messageId, it is used as placeholder before real messageId returned
-    text = text.trim();
     const intermediateId = overrideUserMessageId ?? v4();
     parentMessageId = parentMessageId ?? latestMessage?.messageId ?? Constants.NO_PARENT;