fix: close documented platform polish gaps

src/apps/admin/AdminChannelsPage.tsx

@@ -3,6 +3,7 @@ import { CheckCircle2, Copy, Eye, ExternalLink, FileText, Info, Pencil, Plus, Po
 import { useNavigate } from 'react-router-dom';
 import { adminApi, type AdminChannel, type ChannelConnectionLogResponse, type ChannelTestResponse, type CmppConnectionState } from '@/api/adminApi';
 import { Breadcrumb, Button, Input, Modal, Pagination, Select, Tag, Textarea } from '@/components/ui';
+import { formatDateTime } from '@/utils/dateTime';
 
 type Carrier = 'mobile' | 'unicom' | 'telecom' | 'all';
 type ChannelStatus = 'normal' | 'stopped' | 'connecting' | 'failed';
@@ -97,13 +98,6 @@ const regionOptions = [
   ...'北京,天津,河北,山西,内蒙古,辽宁,吉林,黑龙江,上海,江苏,浙江,安徽,福建,江西,山东,河南,湖北,湖南,广东,广西,海南,重庆,四川,贵州,云南,西藏,陕西,甘肃,青海,宁夏,新疆,香港,澳门,台湾'.split(',').map((province) => ({ label: province, value: province })),
 ];
 
-const extensionOptions = [
-  { label: '0', value: '0' },
-  { label: '2', value: '2' },
-  { label: '4', value: '4' },
-  { label: '6', value: '6' },
-];
-
 const carrierLabelMap: Record<Carrier, string> = {
   mobile: '移动',
   unicom: '联通',
@@ -321,7 +315,7 @@ function ChannelFormModal({
             />
             <div className="sms-channel-inline-field">
               <Input label="* 接入号" onChange={(event) => setAccessNo(event.target.value)} placeholder="请输入通道接入号" value={accessNo} />
-            <Select label="拓展位数" onChange={(event) => setExtensionDigits(event.target.value)} options={extensionOptions} value={extensionDigits} />
+            <Input label="扩展位数" max="20" min="0" onChange={(event) => setExtensionDigits(event.target.value)} type="number" value={extensionDigits} />
           </div>
             <Input label="* 通道流速" max="2000" min="1" onChange={(event) => setFlowLimit(event.target.value)} suffix="条/秒" type="number" value={flowLimit} />
             <Input label="* 期望连接数" onChange={(event) => setDesiredConnections(event.target.value)} placeholder="1" value={desiredConnections} />
@@ -732,7 +726,7 @@ export function AdminChannelsPage() {
                     </div>
                     <div>
                       <span>最近心跳</span>
-                      <strong>{connection.lastHeartbeatAt ? new Date(connection.lastHeartbeatAt).toLocaleString('zh-CN', { hour12: false }) : '-'}</strong>
+                      <strong>{formatDateTime(connection.lastHeartbeatAt)}</strong>
                     </div>
                     {connection.lastError ? <p>{connection.lastError}</p> : null}
                   </article>
@@ -749,7 +743,7 @@ export function AdminChannelsPage() {
               <article className="channel-log-item" key={log.id}>
                 <div>
                   <strong>{log.event}</strong>
-                  <span>{new Date(log.time).toLocaleString('zh-CN', { hour12: false })}</span>
+                  <span>{formatDateTime(log.time)}</span>
                 </div>
                 <div>
                   <span>{log.resourceId}</span>