feat(admin-frontend): 新增节点自动上线托管能力

为节点新增 auto_online 字段与后台同步任务，
仅对开启托管的节点按在线状态自动同步前台显示。

管理端补齐单节点与批量开关、列表标识与统计，
并在自动上线启用时禁用手动显隐切换。

后端新增定时命令、保存校验、批量更新支持、
数据库迁移与单元测试，保证托管逻辑可落地。

admin-frontend/src/views/nodes/NodesView.vue

@@ -35,6 +35,7 @@ import NodeEditorDialog from './NodeEditorDialog.vue'
 import NodeSortDialog from './NodeSortDialog.vue'
 import {
   buildNodeTypeOptions,
+  countAutoOnlineNodes,
   countOnlineNodes,
   countVisibleNodes,
   filterNodes,
@@ -75,6 +76,7 @@ const pageSize = ref(20)
 const selectedNodeIds = ref<number[]>([])
 const syncingSelection = ref(false)
 const switchingIds = ref<number[]>([])
+const autoSwitchingIds = ref<number[]>([])
 const workingIds = ref<number[]>([])
 const editorVisible = ref(false)
 const editorMode = ref<NodeDialogMode>('create')
@@ -116,6 +118,7 @@ const summaryCards = computed(() => [
   { label: '节点总数', value: String(nodes.value.length) },
   { label: '在线节点', value: String(countOnlineNodes(nodes.value)) },
   { label: '显示中', value: String(countVisibleNodes(nodes.value)) },
+  { label: '自动上线', value: String(countAutoOnlineNodes(nodes.value)) },
   { label: '已勾选', value: String(selectedNodes.value.length) },
 ])
 
@@ -159,6 +162,10 @@ function isSwitching(id: number): boolean {
   return switchingIds.value.includes(id)
 }
 
+function isAutoSwitching(id: number): boolean {
+  return autoSwitchingIds.value.includes(id)
+}
+
 function isWorking(id: number): boolean {
   return workingIds.value.includes(id)
 }
@@ -285,6 +292,7 @@ async function handleBatchSubmit(payload: NodeBatchEditPayload) {
     host: payload.host,
     rate: payload.rate,
     group_ids: payload.group_ids,
+    auto_online: payload.auto_online,
   }
 
   try {
@@ -422,6 +430,29 @@ async function handleToggleShow(node: AdminNodeItem, nextValue: boolean) {
   }
 }
 
+async function handleToggleAutoOnline(node: AdminNodeItem, nextValue: boolean) {
+  const previous = Boolean(node.auto_online)
+  if (previous === nextValue) {
+    return
+  }
+
+  node.auto_online = nextValue
+  markPending(autoSwitchingIds, node.id, true)
+
+  try {
+    await updateNode({
+      id: node.id,
+      auto_online: nextValue,
+    })
+    ElMessage.success(nextValue ? '已开启自动上线' : '已关闭自动上线')
+  } catch (error) {
+    node.auto_online = previous
+    ElMessage.error(error instanceof Error ? error.message : '自动上线状态更新失败')
+  } finally {
+    markPending(autoSwitchingIds, node.id, false)
+  }
+}
+
 async function handlePinTop(node: AdminNodeItem) {
   const orderedNodes = sortNodesByOrder(nodes.value)
   if (orderedNodes[0]?.id === node.id) {
@@ -689,12 +720,25 @@ watch(
               <ElSwitch
                 :model-value="Boolean(row.show)"
                 :loading="isSwitching(row.id)"
+                :disabled="Boolean(row.auto_online)"
                 @change="(value) => handleToggleShow(row, Boolean(value))"
               />
             </div>
           </template>
         </ElTableColumn>
 
+        <ElTableColumn label="自动上线" width="118">
+          <template #default="{ row }">
+            <div class="switch-shell switch-shell--auto">
+              <ElSwitch
+                :model-value="Boolean(row.auto_online)"
+                :loading="isAutoSwitching(row.id)"
+                @change="(value) => handleToggleAutoOnline(row, Boolean(value))"
+              />
+            </div>
+          </template>
+        </ElTableColumn>
+
         <ElTableColumn label="节点" min-width="280">
           <template #default="{ row }">
             <div class="node-cell">
@@ -706,6 +750,15 @@ watch(
                 <ElTag round effect="plain" :type="getNodeStatusMeta(row).tagType">
                   {{ getNodeStatusMeta(row).label }}
                 </ElTag>
+                <ElTag
+                  v-if="row.auto_online"
+                  round
+                  effect="plain"
+                  type="primary"
+                  class="auto-online-tag"
+                >
+                  自动上线
+                </ElTag>
                 <ElTooltip :content="getNodeGfwTooltip(row)" placement="top">
                   <ElTag
                     round
@@ -991,6 +1044,10 @@ watch(
   --el-switch-on-color: var(--node-switch-color);
 }
 
+.switch-shell--auto :deep(.el-switch) {
+  --el-switch-on-color: #0071e3;
+}
+
 .node-cell,
 .stack-cell,
 .online-cell {
@@ -1055,7 +1112,8 @@ watch(
 
 .rate-tag,
 .id-tag,
-.gfw-tag {
+.gfw-tag,
+.auto-online-tag {
   font-variant-numeric: tabular-nums;
 }