feat: 全站默认只看在线——监控页/大屏/待连接池同步过滤离线设备（可切换查看全部）；18051 main 旧实例已停止（STF 已删，旧代码无保留意义）

templates/admin/wall.html

@@ -116,6 +116,9 @@ main{position:relative;z-index:2;height:calc(100vh - 88px);overflow-y:auto;paddi
 <header>
   <div class="title">设备监控大屏</div>
   <div class="stats" id="wall-stats"></div>
+  <label class="wall-btn" style="display:inline-flex;align-items:center;gap:4px;cursor:pointer">
+    <input type="checkbox" id="wall-filter-online" checked onchange="refreshStatus()"> 只看在线
+  </label>
   <button class="wall-btn" id="btn-wake-all" onclick="wakeAll()">💡 一键亮屏</button>
   <div class="clock"><span id="wall-clock">--:--:--</span><div class="date" id="wall-date"></div></div>
 </header>
@@ -203,11 +206,18 @@ async function refreshStatus(){
                 JSON.stringify(_devices.map(d=>[d.serial,d.present,d.worker_status,d.task_job,d.current_action,d.progress,d.device_name,d.model]));
   _devices=devs;
   renderStats(devs);
-  if(changed)renderGrid(devs);
+  if(changed)renderGrid(visibleDevs(devs));
   // 操作弹窗打开时同步刷新其标题状态
   if(_ctrlSerial)updateCtrlHead();
 }
 
+// 「只看在线」勾选时过滤离线设备（默认勾选）
+function visibleDevs(devs){
+  const onlyOnline=document.getElementById('wall-filter-online')
+    ? document.getElementById('wall-filter-online').checked : true;
+  return onlyOnline? devs.filter(d=>d.present) : devs;
+}
+
 function renderStats(devs){
   const online=devs.filter(d=>d.present).length;
   const running=devs.filter(d=>['running','connecting'].includes(d.worker_status)).length;