diff --git a/static/admin/monitor.js b/static/admin/monitor.js
index 1bce159..0763f42 100644
--- a/static/admin/monitor.js
+++ b/static/admin/monitor.js
@@ -289,16 +289,15 @@ function showTab(name){
   if(name==='monitor'){loadMonitor();_monitorTimer=setInterval(loadMonitor,5000);}
   if(name==='tasks'){showSubTab('tasks',_activeSubs.tasks);loadTasks();loadCustomActions();}
   if(name==='apps'){showSubTab('apps',_activeSubs.apps);loadApks();}
-  if(name==='maintenance'){showSubTab('maintenance',_activeSubs.maintenance);loadAdbDevices();loadTailscaleDevices();}
-  if(name==='tools'){showSubTab('tools',_activeSubs.tools);loadToolsDevices();}
+  if(name==='tools'){showSubTab('tools',_activeSubs.tools);loadToolsDevices();loadAdbDevices();loadTailscaleDevices();}
   if(name==='groups')loadGroups();
   if(name==='logs'){loadLogs();if(document.getElementById('log-auto').checked)_logTimer=setInterval(loadLogs,3000);}
   if(name==='users')loadUsers();
 }
 
-// ================== 页内子分栏（任务/应用/维护/工具 通用） ==================
+// ================== 页内子分栏（任务/应用/工具 通用） ==================
 // 每个带子分栏的 Tab 记住上次选中的子分栏，切走再切回来保持原位
-let _activeSubs = {tasks: 'plan', apps: 'apks', maintenance: 'stf', tools: 'clipboard'};
+let _activeSubs = {tasks: 'plan', apps: 'apks', tools: 'clipboard'};
 
 function showSubTab(tabId, name){
   _activeSubs[tabId] = name;
@@ -311,15 +310,25 @@ function showSubTab(tabId, name){
 let _clipDevices = [];          // [{serial, state}]，来源 /api/adb/devices（本地 adb + STF 池）
 let _clipSelected = new Set();
 
-function _escHtml(s){
-  return String(s==null?'':s).replace(/[&<>"']/g, c=>({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[c]));
+// 本地 adb 设备列表共享缓存（剪贴板/终端两个面板同源，10 秒内复用避免重复请求；force 强制刷新）
+let _adbDevicesCache = null;    // {ts, data}
+
+async function _fetchAdbDevices(force){
+  const now = Date.now();
+  if(!force && _adbDevicesCache && now - _adbDevicesCache.ts < 10000){
+    return _adbDevicesCache.data;
+  }
+  const r = await apiGet('/api/adb/devices');
+  if(!r || !r.ok) return null;
+  _adbDevicesCache = {ts: now, data: r.devices || []};
+  return _adbDevicesCache.data;
 }
 
-async function loadToolsDevices(){
-  const r = await apiGet('/api/adb/devices');
+async function loadToolsDevices(force){
+  const list = await _fetchAdbDevices(force);
   const status = document.getElementById('clip-status');
-  if(!r||!r.ok){status.textContent='加载失败';showToast('加载设备失败: '+(r&&r.error||''),'error');return;}
-  _clipDevices = r.devices||[];
+  if(list === null){status.textContent='加载失败';showToast('加载设备失败','error');return;}
+  _clipDevices = list;
   const wrap = document.getElementById('clip-devices');
   if(!_clipDevices.length){
     wrap.innerHTML='<div class="empty" style="padding:20px">无可用设备（本地 adb 或 STF 池均无）</div>';
@@ -329,9 +338,9 @@ async function loadToolsDevices(){
   wrap.innerHTML = _clipDevices.map(d=>{
     const st = d.state==='stf' ? 'STF池' : (d.state==='device' ? '已连接' : d.state);
     const stCls = (d.state==='device'||d.state==='stf') ? 'label-success' : 'label-warning';
-    return '<label data-serial="'+_escHtml(d.serial)+'">'
-      +'<input type="checkbox" value="'+_escHtml(d.serial)+'"'+( _clipSelected.has(d.serial)?' checked':'')+' onchange="toggleClipDevice(this)">'
-      +'<span style="font-family:monospace;flex:1;overflow:hidden;text-overflow:ellipsis">'+_escHtml(d.serial)+'</span>'
+    return '<label data-serial="'+esc(d.serial)+'">'
+      +'<input type="checkbox" value="'+esc(d.serial)+'"'+( _clipSelected.has(d.serial)?' checked':'')+' onchange="toggleClipDevice(this)">'
+      +'<span style="font-family:monospace;flex:1;overflow:hidden;text-overflow:ellipsis">'+esc(d.serial)+'</span>'
       +'<span class="label '+stCls+'">'+st+'</span></label>';
   }).join('');
   status.textContent = '共 '+_clipDevices.length+' 台设备';
@@ -352,7 +361,7 @@ async function injectClipboard(){
     const r = await apiPost('/api/tools/clipboard/set', {serials:[..._clipSelected], text});
     if(!r||!r.ok){showToast('注入失败: '+(r&&r.error||''),'error');return;}
     const rows = Object.entries(r.results).map(([s,v])=>
-      '<tr><td style="font-family:monospace">'+_escHtml(s)+'</td><td>'+(v.ok?'<span class="label label-success">成功</span>':'<span class="label label-danger">失败</span> '+_escHtml(v.msg))+'</td></tr>').join('');
+      '<tr><td style="font-family:monospace">'+esc(s)+'</td><td>'+(v.ok?'<span class="label label-success">成功</span>':'<span class="label label-danger">失败</span> '+esc(v.msg))+'</td></tr>').join('');
     document.getElementById('clip-result').innerHTML = rows;
     document.getElementById('clip-result-wrap').style.display = 'block';
     showToast('注入完成：成功 '+r.ok_count+' 台，失败 '+r.fail_count+' 台', r.fail_count?'error':'success');
@@ -2266,15 +2275,15 @@ function _attachDevice(cmd){
   if(_NO_DEVICE_CMDS.indexOf(first)>=0)return cmd;
   return '-s '+serial+' '+cmd;
 }
-async function loadAdbDevices(){
+async function loadAdbDevices(force){
   const sel=document.getElementById('adb-device');
   if(!sel)return;
-  const r=await apiGet('/api/adb/devices');
-  if(!r||!r.ok)return;
+  const list=await _fetchAdbDevices(force);
+  if(list===null)return;
   const cur=sel.value;
   const stateTxt={device:'在线',offline:'离线',stf:'STF池(未连接)'};
   const opts=['<option value="">（不指定设备）</option>'].concat(
-    (r.devices||[]).map(d=>
+    list.map(d=>
       '<option value="'+esc(d.serial)+'">'+esc(d.serial)+' ('+(stateTxt[d.state]||d.state)+')</option>'
     )
   );
diff --git a/templates/admin/monitor.html b/templates/admin/monitor.html
index e63d41d..6a41715 100644
--- a/templates/admin/monitor.html
+++ b/templates/admin/monitor.html
@@ -501,75 +501,15 @@ select.form-control{cursor:pointer}
 <!-- ========== Tab 7: 维护（仅管理员） ========== -->
 <div id="tab-maintenance" class="tab-panel">
   <div class="page-title">维护</div>
-  <div class="page-sub">管理员专用：STF 服务、adb 远程终端与 Tailscale 设备管理</div>
-
-  <div class="sub-tabs">
-    <button class="sub-tab active" data-sub="stf" onclick="showSubTab('maintenance','stf')">STF 服务</button>
-    <button class="sub-tab" data-sub="adb" onclick="showSubTab('maintenance','adb')">adb 远程终端</button>
-    <button class="sub-tab" data-sub="ts" onclick="showSubTab('maintenance','ts')">Tailscale 管理</button>
+  <div class="page-sub">管理员专用：STF 服务管理（adb 远程终端与 Tailscale 管理已移至"工具"）</div>
+  <div class="toolbar">
+    <button class="btn btn-danger" onclick="restartStf()">一键重启 STF 容器</button>
+    <span id="stf-restart-status" class="text-muted"></span>
   </div>
-
-  <!-- 子分栏 1：STF 服务 -->
-  <div class="sub-panel active" id="maintenance-sub-stf">
-    <div class="toolbar">
-      <button class="btn btn-danger" onclick="restartStf()">一键重启 STF 容器</button>
-      <span id="stf-restart-status" class="text-muted"></span>
-    </div>
-    <div class="help" style="margin-top:8px">
-      通过 SSH 到部署机执行 <code>docker restart</code>（目标与容器名可用环境变量
-      <code>STF_SSH_TARGET</code> / <code>STF_DOCKER_CONTAINER</code> 配置）。
-      影响：STF 约 30 秒不可用，期间设备占用状态重置；<b>有任务在运行时会被拒绝执行</b>。
-    </div>
-  </div>
-
-  <!-- 子分栏 2：adb 远程终端 -->
-  <div class="sub-panel" id="maintenance-sub-adb">
-    <div class="help">选中目标设备后，命令里的 <code>-s &lt;设备&gt;</code> 自动附加，直接写
-      <code>shell ls /sdcard</code> 即可。离线设备也可选，用"重连设备"恢复。
-      <b>禁止 kill-server / disconnect</b>（会中断 STF provider 的设备监控）。</div>
-    <div style="display:flex;gap:8px;margin:8px 0;align-items:center">
-      <label style="font-size:12px;color:var(--text-light)">目标设备</label>
-      <select id="adb-device" class="form-control" style="flex:1;max-width:340px;font-family:monospace"></select>
-      <button class="btn btn-xs" onclick="loadAdbDevices()" title="刷新设备列表">刷新</button>
-    </div>
-    <div style="display:flex;gap:8px;margin:8px 0">
-      <input type="text" id="adb-cmd-input" class="form-control" style="flex:1;font-family:monospace"
-             placeholder="shell ls /sdcard（选中设备后 -s 自动附加）"
-             onkeydown="if(event.key==='Enter')runAdbCmd()">
-      <button class="btn btn-primary" onclick="runAdbCmd()">执行</button>
-    </div>
-    <div style="display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap">
-      <button class="btn btn-xs" onclick="fillAdbCmd('adb devices')">adb devices</button>
-      <button class="btn btn-xs" onclick="fillAdbCmd('shell dumpsys window | grep mCurrentFocus')">前台App</button>
-      <button class="btn btn-xs" onclick="fillAdbCmd('shell ls /sdcard')">列文件</button>
-      <button class="btn btn-xs" onclick="fillAdbCmd('shell screencap -p /sdcard/shot.png')">截屏</button>
-      <button class="btn btn-xs" onclick="fillAdbCmd('shell pm list packages -3')">已装应用</button>
-    </div>
-    <div style="display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap">
-      <button class="btn btn-xs btn-danger" onclick="uninstallStfAgent()" title="卸载 jp.co.cyberagent.stf，STF 会在设备重连时重新推送">卸载 STF agent（卡死时用）</button>
-      <button class="btn btn-xs" onclick="reconnectAdbDevice()" title="重新 adb connect 该设备">重连设备</button>
-      <button class="btn btn-xs" onclick="checkStfAgent()" title="查看 jp.co.cyberagent.stf 是否已安装">检查 agent</button>
-    </div>
-    <pre id="adb-output" class="adb-console">（执行命令后输出显示在这里）</pre>
-  </div>
-
-  <!-- 子分栏 3：Tailscale 管理 -->
-  <div class="sub-panel" id="maintenance-sub-ts">
-    <div class="help" id="ts-hint"></div>
-    <div class="toolbar" style="margin:8px 0">
-      <button class="btn btn-primary" onclick="loadTailscaleDevices()">刷新设备</button>
-      <button class="btn" onclick="openTailscaleAuthKey()">生成接入 Auth Key</button>
-      <input class="form-control list-search" id="search-tailscale" placeholder="搜索主机名/名称/IP...">
-      <span id="ts-status" class="text-muted" style="margin-left:10px"></span>
-    </div>
-    <table class="table">
-      <thead><tr>
-        <th>主机名</th><th>显示名</th><th>IP</th><th>系统</th><th>在线</th><th>授权</th><th>密钥过期</th><th>操作</th>
-      </tr></thead>
-      <tbody id="tb-tailscale"><tr><td colspan="8" class="empty">点击"刷新设备"加载</td></tr></tbody>
-    </table>
-    <div class="list-pager" id="pager-tailscale"></div>
-    <div class="help">"设置IP"可修改设备 IPv4（会断开当前连接，平台 serial 随之变化，需同步 STF 设备池）；"密钥不过期"= 关闭设备密钥验证，设备不会被定期踢下线；auth key 生成后只显示一次，请立即复制。</div>
+  <div class="help" style="margin-top:8px">
+    通过 SSH 到部署机执行 <code>docker restart</code>（目标与容器名可用环境变量
+    <code>STF_SSH_TARGET</code> / <code>STF_DOCKER_CONTAINER</code> 配置）。
+    影响：STF 约 30 秒不可用，期间设备占用状态重置；<b>有任务在运行时会被拒绝执行</b>。
   </div>
 </div>
 
@@ -580,12 +520,14 @@ select.form-control{cursor:pointer}
 
   <div class="sub-tabs">
     <button class="sub-tab active" data-sub="clipboard" onclick="showSubTab('tools','clipboard')">剪贴板注入</button>
+    <button class="sub-tab" data-sub="adb" onclick="showSubTab('tools','adb')">adb 远程终端</button>
+    <button class="sub-tab" data-sub="ts" onclick="showSubTab('tools','ts')">Tailscale 管理</button>
   </div>
 
   <!-- 子分栏 1：剪贴板注入 -->
   <div class="sub-panel active" id="tools-sub-clipboard">
     <div class="toolbar">
-      <button class="btn" onclick="loadToolsDevices()">刷新设备</button>
+      <button class="btn" onclick="loadToolsDevices(true)">刷新设备</button>
       <span id="clip-status" class="text-muted"></span>
     </div>
     <div style="display:flex;gap:20px;flex-wrap:wrap">
@@ -618,6 +560,56 @@ select.form-control{cursor:pointer}
       </table>
     </div>
   </div>
+
+  <!-- 子分栏 2：adb 远程终端 -->
+  <div class="sub-panel" id="tools-sub-adb">
+    <div class="help">选中目标设备后，命令里的 <code>-s &lt;设备&gt;</code> 自动附加，直接写
+      <code>shell ls /sdcard</code> 即可。离线设备也可选，用"重连设备"恢复。
+      <b>禁止 kill-server / disconnect</b>（会中断 STF provider 的设备监控）。</div>
+    <div style="display:flex;gap:8px;margin:8px 0;align-items:center">
+      <label style="font-size:12px;color:var(--text-light)">目标设备</label>
+      <select id="adb-device" class="form-control" style="flex:1;max-width:340px;font-family:monospace"></select>
+      <button class="btn btn-xs" onclick="loadAdbDevices(true)" title="刷新设备列表">刷新</button>
+    </div>
+    <div style="display:flex;gap:8px;margin:8px 0">
+      <input type="text" id="adb-cmd-input" class="form-control" style="flex:1;font-family:monospace"
+             placeholder="shell ls /sdcard（选中设备后 -s 自动附加）"
+             onkeydown="if(event.key==='Enter')runAdbCmd()">
+      <button class="btn btn-primary" onclick="runAdbCmd()">执行</button>
+    </div>
+    <div style="display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap">
+      <button class="btn btn-xs" onclick="fillAdbCmd('adb devices')">adb devices</button>
+      <button class="btn btn-xs" onclick="fillAdbCmd('shell dumpsys window | grep mCurrentFocus')">前台App</button>
+      <button class="btn btn-xs" onclick="fillAdbCmd('shell ls /sdcard')">列文件</button>
+      <button class="btn btn-xs" onclick="fillAdbCmd('shell screencap -p /sdcard/shot.png')">截屏</button>
+      <button class="btn btn-xs" onclick="fillAdbCmd('shell pm list packages -3')">已装应用</button>
+    </div>
+    <div style="display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap">
+      <button class="btn btn-xs btn-danger" onclick="uninstallStfAgent()" title="卸载 jp.co.cyberagent.stf，STF 会在设备重连时重新推送">卸载 STF agent（卡死时用）</button>
+      <button class="btn btn-xs" onclick="reconnectAdbDevice()" title="重新 adb connect 该设备">重连设备</button>
+      <button class="btn btn-xs" onclick="checkStfAgent()" title="查看 jp.co.cyberagent.stf 是否已安装">检查 agent</button>
+    </div>
+    <pre id="adb-output" class="adb-console">（执行命令后输出显示在这里）</pre>
+  </div>
+
+  <!-- 子分栏 3：Tailscale 管理 -->
+  <div class="sub-panel" id="tools-sub-ts">
+    <div class="help" id="ts-hint"></div>
+    <div class="toolbar" style="margin:8px 0">
+      <button class="btn btn-primary" onclick="loadTailscaleDevices()">刷新设备</button>
+      <button class="btn" onclick="openTailscaleAuthKey()">生成接入 Auth Key</button>
+      <input class="form-control list-search" id="search-tailscale" placeholder="搜索主机名/名称/IP...">
+      <span id="ts-status" class="text-muted" style="margin-left:10px"></span>
+    </div>
+    <table class="table">
+      <thead><tr>
+        <th>主机名</th><th>显示名</th><th>IP</th><th>系统</th><th>在线</th><th>授权</th><th>密钥过期</th><th>操作</th>
+      </tr></thead>
+      <tbody id="tb-tailscale"><tr><td colspan="8" class="empty">点击"刷新设备"加载</td></tr></tbody>
+    </table>
+    <div class="list-pager" id="pager-tailscale"></div>
+    <div class="help">"设置IP"可修改设备 IPv4（会断开当前连接，平台 serial 随之变化，需同步 STF 设备池）；"密钥不过期"= 关闭设备密钥验证，设备不会被定期踢下线；auth key 生成后只显示一次，请立即复制。</div>
+  </div>
 </div>
 
 </div><!-- /.content -->