fix: Don't hide chat streaming loader on '\n' content (#26829)

web/app/components/base/chat/chat/answer/index.tsx

@@ -111,6 +111,8 @@ const Answer: FC<AnswerProps> = ({
     }
   }, [switchSibling, item.prevSibling, item.nextSibling])
 
+  const contentIsEmpty = content.trim() === ''
+
   return (
     <div className='mb-2 flex last:mb-0'>
       <div className='relative h-10 w-10 shrink-0'>
@@ -153,14 +155,14 @@ const Answer: FC<AnswerProps> = ({
               )
             }
             {
-              responding && !content && !hasAgentThoughts && (
+              responding && contentIsEmpty && !hasAgentThoughts && (
                 <div className='flex h-5 w-6 items-center justify-center'>
                   <LoadingAnim type='text' />
                 </div>
               )
             }
             {
-              content && !hasAgentThoughts && (
+              !contentIsEmpty && !hasAgentThoughts && (
                 <BasicContent item={item} />
               )
             }