😎优化清理在线用户逻辑

Admin.NET/Admin.NET.Core/Service/OnlineUser/SysOnlineUserService.cs

@@ -119,14 +119,15 @@ public class SysOnlineUserService : IDynamicApiController, ITransient
         if (await _sysConfigService.GetConfigValueByCode<bool>(ConfigConst.SysSingleLogin)) return;
 
         // 相同账号最后登录的用户Id集合
-        var onlineUserIds = await _sysOnlineUerRep.AsQueryable().GroupBy(u => u.UserId)
+        var onlineUsers = await _sysOnlineUerRep.AsQueryable().GroupBy(u => u.UserId)
             .Select(u => new
             {
                 UserId = u.UserId,
                 Count = SqlFunc.AggregateCount(u.UserId),
                 Id = SqlFunc.AggregateMax(u.Id)
             })
-            .ToListAsync(u => u.Id);
+            .ToListAsync();
+        var onlineUserIds = onlineUsers.Select(u => u.Id).ToList();
 
         // 无效登录用户集合
         var offlineUsers = await _sysOnlineUerRep.AsQueryable().Where(u => !onlineUserIds.Contains(u.Id)).ToListAsync();