fix(web): copy button visible at chat page normally (#4005)

Co-authored-by: rongjun.qiu <qiurj@hengtonggroup.com.cn>

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

@@ -362,7 +362,7 @@ const Answer: FC<IAnswerProps> = ({
                 {!item.isOpeningStatement && (
                   <CopyBtn
                     value={content}
-                    className={cn(s.copyBtn, 'mr-1')}
+                    className='mr-1'
                   />
                 )}
                 {((isShowPromptLog && !isResponding) || (!item.isOpeningStatement && isShowTextToSpeech)) && (

web/app/components/base/markdown.tsx

@@ -12,7 +12,6 @@ import cn from 'classnames'
 import CopyBtn from '@/app/components/app/chat/copy-btn'
 import SVGBtn from '@/app/components/app/chat/svg'
 import Flowchart from '@/app/components/app/chat/mermaid'
-import s from '@/app/components/app/chat/style.module.css'
 
 // Available language https://github.com/react-syntax-highlighter/react-syntax-highlighter/blob/master/AVAILABLE_LANGUAGES_HLJS.MD
 const capitalizationLanguageNameMap: Record<string, string> = {
@@ -113,7 +112,7 @@ export function Markdown(props: { content: string; className?: string }) {
                         />
                       }
                       <CopyBtn
-                        className={cn(s.copyBtn, 'mr-1')}
+                        className='mr-1'
                         value={String(children).replace(/\n$/, '')}
                         isPlain
                       />