feat: 调度简单设置（频率选择器）+ 运行窗口 + 下次运行列

templates/admin/monitor.html

@@ -337,13 +337,13 @@ select.form-control{cursor:pointer}
   <div class="page-title">任务计划管理</div>
   <div class="page-sub">新建、编辑、删除任务计划，支持立即执行和定时调度</div>
   <div class="toolbar">
-    <button class="btn btn-primary" onclick="openTaskModal()">新建任务</button>
+    <button class="btn btn-primary" onclick="openTaskModal()" data-perm="tasks">新建任务</button>
     <button class="btn" onclick="loadTasks()">刷新</button>
     <input class="form-control list-search" id="search-tasks" placeholder="搜索任务名/类型/ID...">
   </div>
   <table class="table">
     <thead><tr>
-      <th>ID</th><th>任务名</th><th>类型</th><th>启用</th><th>目标</th><th>调度</th><th>重试</th><th>操作</th>
+      <th>ID</th><th>任务名</th><th>类型</th><th>启用</th><th>目标</th><th>调度</th><th>下次运行</th><th>重试</th><th>操作</th>
     </tr></thead>
     <tbody id="tb-tasks"></tbody>
   </table>