feat: 添加一键登出全部按钮

frontend/src/views/Users.vue

@@ -34,6 +34,13 @@
             </el-button>
           </template>
         </el-popconfirm>
+        <el-popconfirm title="确定要登出所有虚拟用户吗？" @confirm="handleLogoutAll">
+          <template #reference>
+            <el-button size="small" type="info" :loading="logoutAllLoading">
+              <el-icon><SwitchButton /></el-icon> 一键登出全部
+            </el-button>
+          </template>
+        </el-popconfirm>
         <el-tooltip content="从目标平台同步所有已登录用户的昵称/真实姓名/性别/头像" placement="top">
           <el-button size="small" type="info" :loading="syncLoading" @click="handleSyncAll">
             <el-icon><Refresh /></el-icon> 同步用户信息
@@ -495,6 +502,7 @@ async function handleExport() {
 }
 
 const loginAllLoading = ref(false)
+const logoutAllLoading = ref(false)
 
 const syncLoading = ref(false)
 const avatarUploading = ref(false)
@@ -521,6 +529,19 @@ async function handleAvatarUpload(file) {
   return false  // 阻止 el-upload 默认上传
 }
 
+async function handleLogoutAll() {
+  logoutAllLoading.value = true
+  try {
+    const res = await request.post('/users/logout-all')
+    ElMessage.success(res.message || '已登出所有用户')
+    loadUsers()
+  } catch(e) {
+    ElMessage.error('登出失败：' + (e.message || '未知错误'))
+  } finally {
+    logoutAllLoading.value = false
+  }
+}
+
 async function handleSyncAll() {
   syncLoading.value = true
   try {