feat: daily node restart controlled from the admin, connect timings as a default line task [CI]

Agents and Probes exit in order at a configured time (default 04:30 UTC+8, switch and time zone in the admin settings) and the service manager starts them again; a local restart_at or MOSHIRO_RESTART_AT wins. The connect kind (TCP connect and TLS handshake timings) is now a default continuous line template, with a section on the line page.

backend/agent/src/MoShiro.Agent/AgentApp.cs

@@ -16,6 +16,7 @@ public sealed class AgentApp : IDisposable
 
     private readonly AgentConfig _config;
     private readonly bool _ipv6Supported;
+    private readonly RestartController? _restart;
     private readonly LoadedNodeIdentity _identity;
     private readonly TimeProvider _time;
     private readonly INodeLog _log;
@@ -37,8 +38,9 @@ public sealed class AgentApp : IDisposable
     private readonly FleetLink _link;
 
     /// <param name="dataDirectory">配置目录（容器里的 <c>/etc/moshiro</c>）：宿主机更新器和节点在这里交换清单、请求和状态。</param>
-    public AgentApp(AgentConfig config, LoadedNodeIdentity identity, string dataDirectory, TimeProvider time, INodeLog log)
+    public AgentApp(AgentConfig config, LoadedNodeIdentity identity, string dataDirectory, TimeProvider time, INodeLog log, RestartController? restart = null)
     {
+        _restart = restart;
         _update = new UpdateBridge(dataDirectory, new ConfigStore(dataDirectory).Write, log);
         _config = config;
         _identity = identity;
@@ -219,6 +221,19 @@ public sealed class AgentApp : IDisposable
             });
         }
 
+        if (Allow(MoShiroMethods.Schedule) && _restart is not null)
+        {
+            router.OnNotify(MoShiroMethods.Schedule, MoShiroJsonContext.Default.ScheduleParams, (_, schedule, _) =>
+            {
+                if (!_restart.SetRemote(schedule.RestartAt))
+                {
+                    _log.Warn("ignoring an invalid restart schedule from the panel");
+                }
+
+                return ValueTask.CompletedTask;
+            });
+        }
+
         if (Allow(MoShiroMethods.UpdateApply))
         {
             router.OnNotify(MoShiroMethods.UpdateApply, MoShiroJsonContext.Default.UpdateOfferParams, (_, _, _) =>