fix: email detail btns key

src/views/Conversations/Online/Components/EmailDetailInline.jsx

@@ -200,7 +200,7 @@ const EmailDetailInline = ({ mailID, emailMsg = {}, disabled = false, variant, s
     if (showFullBtn) {
       btns.push(
         <>
-        <Divider key='divider1' type='vertical' className='mx-0' />
+        <Divider key='divider2' type='vertical' className='mx-0' />
         <Button key={'view'} onClick={() => handleView()} size='small' type='text' icon={<ExpandOutlined className='text-indigo-500' />}>
           最大化
         </Button>