fix(web): remove private message history help text

web/src/pages/creator/messages/index.tsx

@@ -17,7 +17,6 @@ type SendValues = { account_id: string; peer_uid: string; text: string };
 type SendAttempt = { request_id: string; text: string; state: string; error: string; pending: boolean; version: number; messageId?: string };
 const PAGE_SIZE = 25;
 const MESSAGE_PAGE_SIZE = 50;
-const HISTORY_HINT = '仅展示聊天客户端已加载会话的最近 50 条消息，不代表完整历史；已发送不代表对方已收到或已读。';
 const accountName = (name?: string) => name?.trim() || '未命名账号';
 const STATE_ICONS: Record<string, typeof CheckCircleOutlined> = {
   succeeded: CheckCircleOutlined, sending: LoadingOutlined,
@@ -313,7 +312,6 @@ export default function PrivateMessagesPage() {
           <Typography.Text type="secondary">{contactTotal} 个私信会话</Typography.Text>
           <Button type="primary" icon={<PlusOutlined />} disabled={!enabledAccounts.length} onClick={() => { setNewChatError(''); setSendOpen(true); }}>新建私信</Button>
         </Flex>
-        <Typography.Text type="secondary">{HISTORY_HINT} 仅手动发送文字，不自动回复或群发。</Typography.Text>
         {contactError && <Alert type="error" showIcon title="私信会话加载失败" description={contactError} />}
         {statuses.filter((status) => status.error).map((status) => <Alert key={status.account_id} type="warning" showIcon title={`${accountName(status.account_name)}：私信同步异常`} description={status.error} />)}
         <Splitter style={{ height: 600 }}>