fix: missing duration dropdown in bans add form

public/js/pages/bans.js

@@ -40,6 +40,7 @@ const BansPage = {
       <form id="ban-form">
         <div class="grid-2"><div class="form-group"><label>玩家名 *</label><input id="ban-name" required></div><div class="form-group"><label>UID</label><input id="ban-uid"></div></div>
         <div class="grid-2"><div class="form-group"><label>来源</label><select id="ban-source"><option value="">未知</option><option value="netease">网易端</option><option value="skin">皮肤站</option></select></div><div class="form-group"><label>类型</label><select id="ban-type" onchange="BansPage.checkMinDuration()"><option value="ban">封禁</option><option value="mute">禁言</option><option value="warn">警告</option></select></div></div>
+        <div class="grid-2"><div class="form-group"><label>时长</label><select id="ban-dur"><option value="">永久</option><option value="1天">1天</option><option value="3天">3天</option><option value="7天">7天</option><option value="30天">30天</option></select></div></div>
         <div class="form-group"><label>原因</label><textarea id="ban-reason" rows="2"></textarea></div>
         <div class="modal-f"><button type="button" class="btn btn-o" data-action="App:closeModal">取消</button><button type="submit" class="btn btn-p">添加</button></div>
       </form>