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/src/MoShiro.Backend.Application/Agents/MoShiroFleetHooks.cs

@@ -53,11 +53,13 @@ public sealed class MoShiroNodeEventSink : INodeEventSink
     private readonly AgentService _service;
     private readonly NodeInfoService _nodes;
     private readonly ReleaseService _releases;
+    private readonly ScheduleService _schedule;
     private readonly IProbeStore _probes;
 
-    public MoShiroNodeEventSink(IAgentStore agents, AgentRuntime runtime, IEventStore events, LiveHub live, AgentService service, NodeInfoService nodes, ReleaseService releases, IProbeStore probes)
+    public MoShiroNodeEventSink(IAgentStore agents, AgentRuntime runtime, IEventStore events, LiveHub live, AgentService service, NodeInfoService nodes, ReleaseService releases, ScheduleService schedule, IProbeStore probes)
     {
         _releases = releases;
+        _schedule = schedule;
         _probes = probes;
         _nodes = nodes;
         _agents = agents;
@@ -144,6 +146,7 @@ public sealed class MoShiroNodeEventSink : INodeEventSink
                 }
 
                 await _releases.OfferToNodeAsync(id, ct);
+                await _schedule.SendToNodeAsync(id, ct);
                 break;
             case NodeEventKind.Offline:
                 _live.Publish(new NodeSignal("probe", id.Value, false, nodeEvent.AtMs));
@@ -214,6 +217,7 @@ public sealed class MoShiroNodeEventSink : INodeEventSink
         AgentRecord? after = await _agents.GetAsync(id, ct);
         _nodes.ObserveAgentInBackground(id.Value, after?.PublicHost, meta.Platform);
         await _releases.OfferToNodeAsync(id, ct);
+        await _schedule.SendToNodeAsync(id, ct);
         if (before is not null && after is not null
             && (!before.TlsSpki.AsSpan().SequenceEqual(after.TlsSpki) || before.ProbeTcpPort != after.ProbeTcpPort || !before.ProbeUdpPorts.SequenceEqual(after.ProbeUdpPorts) || before.Ipv6Supported != after.Ipv6Supported)
             && after.Status == NodeStatus.Active)

backend/src/MoShiro.Backend.Application/Agents/ScheduleService.cs

@@ -0,0 +1,54 @@
+using System.Globalization;
+using Fleet.Core;
+
+namespace MoShiro.Backend.Application;
+
+/// <summary>
+/// 节点的定时重启：设置在管理端（开关、时刻、时区偏移），节点连上时补发、设置变化时群发给所有在线节点。
+/// 面板只告诉节点「几点退出」，节点自己到点有序退出、由服务管理器拉起；节点本地写了设置时以本地为准。
+/// </summary>
+public sealed class ScheduleService
+{
+    private readonly SettingsService _settings;
+    private readonly IAgentGateway _gateway;
+
+    public ScheduleService(SettingsService settings, IAgentGateway gateway)
+    {
+        _settings = settings;
+        _gateway = gateway;
+    }
+
+    /// <summary>形如 <c>04:30+08:00</c>；开关关着时为空。</summary>
+    public async ValueTask<string?> RestartAtAsync(CancellationToken ct)
+    {
+        if (!await _settings.GetBoolAsync(SettingsService.RestartEnabled, ct))
+        {
+            return null;
+        }
+
+        return Format(
+            await _settings.GetIntAsync(SettingsService.RestartHour, ct),
+            await _settings.GetIntAsync(SettingsService.RestartMinute, ct),
+            await _settings.GetIntAsync(SettingsService.RestartOffsetMinutes, ct));
+    }
+
+    public static string Format(int hour, int minute, int offsetMinutes)
+    {
+        int abs = Math.Abs(offsetMinutes);
+        return string.Create(CultureInfo.InvariantCulture, $"{hour:00}:{minute:00}{(offsetMinutes < 0 ? '-' : '+')}{abs / 60:00}:{abs % 60:00}");
+    }
+
+    /// <summary>节点刚连上：补发当前设置（节点离线时改的设置也不会错过）。</summary>
+    public async ValueTask SendToNodeAsync(NodeId node, CancellationToken ct) =>
+        await _gateway.NotifyScheduleAsync(node, await RestartAtAsync(ct), ct);
+
+    /// <summary>管理端改了设置：通知所有在线节点。</summary>
+    public async ValueTask SendToAllAsync(CancellationToken ct)
+    {
+        string? restartAt = await RestartAtAsync(ct);
+        foreach (NodeId node in _gateway.OnlineNodes)
+        {
+            await _gateway.NotifyScheduleAsync(node, restartAt, ct);
+        }
+    }
+}