feat: detect an agent's public IPv4 and IPv6 addresses automatically, manual values still win [CI]

backend/src/MoShiro.Backend.Api/Admin/AgentEndpoints.cs

@@ -81,7 +81,7 @@ public static class AgentEndpoints
     private static async Task<IResult> PatchAsync(HttpContext http, AgentService agents, AgentPatchRequest request, string id, CancellationToken ct)
     {
         Result<AgentView> result = await agents.PatchAsync(
-            new NodeId(id), new AgentPatch { Name = request.Name, Labels = request.Labels, PublicHost = request.PublicHost, Ipv6Host = request.Ipv6Host, PublicVisible = request.PublicVisible }, Concurrency.ExpectedRowVersion(http), ct);
+            new NodeId(id), new AgentPatch { Name = request.Name, Labels = request.Labels, PublicHost = request.PublicHost, Ipv6Host = request.Ipv6Host, PublicHostAuto = request.PublicHostAuto, Ipv6HostAuto = request.Ipv6HostAuto, PublicVisible = request.PublicVisible }, Concurrency.ExpectedRowVersion(http), ct);
         if (!result.TryGet(out AgentView? view, out FleetError? error))
         {
             return Problems.From(http, error);

backend/src/MoShiro.Backend.Api/Common/Mappers.cs

@@ -103,7 +103,7 @@ public static class Mappers
             : null;
         return new AgentDto(
             a.Id.Value, a.Name, StatusName(a.Status), view.Online, view.ProbeConnected, [.. view.Probes.Select(ToDto)], view.Host is null ? null : ToDto(view.Host), a.PublicHost, a.ProbeTcpPort, a.ProbeUdpPorts, a.Labels, a.PublicVisible,
-            a.Kinds, a.AgentVersion, limits, a.TaskVersion, a.AppliedTaskVersion, rejected, heartbeat, view.EndpointChanges, Time(a.CreatedAtMs), Time(a.LastSeenAtMs), a.Ipv6Host, a.Ipv6Supported, Ipv6Of(view));
+            a.Kinds, a.AgentVersion, limits, a.TaskVersion, a.AppliedTaskVersion, rejected, heartbeat, view.EndpointChanges, Time(a.CreatedAtMs), Time(a.LastSeenAtMs), a.Ipv6Host, a.Ipv6Supported, Ipv6Of(view), !a.PublicHostManual, !a.Ipv6HostManual);
     }
 
     public static Ipv6DiagnosticDto Ipv6Of(AgentView view)

backend/src/MoShiro.Backend.Api/Contracts/AdminDtos.cs

@@ -40,13 +40,16 @@ public sealed record AgentDto(
     DateTimeOffset? LastSeenAt,
     string Ipv6Host = "",
     bool Ipv6Supported = false,
-    Ipv6DiagnosticDto? Ipv6 = null);
+    Ipv6DiagnosticDto? Ipv6 = null,
+    bool PublicHostAuto = true,
+    bool Ipv6HostAuto = true);
 
 public sealed record Ipv6DiagnosticDto(bool? AddressConfigured, bool SocketSupported, bool? Listening, bool? HasGlobalAddress, bool? HasDefaultRoute, string State,
     string NetworkScope = "unknown", bool? HostHasGlobalAddress = null, bool? HostHasDefaultRoute = null);
 
 /// <summary>merge-patch：缺省或为 null 的字段不修改。</summary>
-public sealed record AgentPatchRequest(string? Name, IReadOnlyList<string>? Labels, string? PublicHost, bool? PublicVisible, string? Ipv6Host = null);
+/// <param name="PublicHostAuto">true：撤销手填，回到自动识别（<c>ipv6_host_auto</c> 同理）。手填 <c>public_host</c> 或 <c>ipv6_host</c> 就是手动，自动识别不再覆盖。</param>
+public sealed record AgentPatchRequest(string? Name, IReadOnlyList<string>? Labels, string? PublicHost, bool? PublicVisible, string? Ipv6Host = null, bool? PublicHostAuto = null, bool? Ipv6HostAuto = null);
 
 /// <param name="Role"><c>agent</c> 或 <c>probe</c>：用这个令牌注册出来的是哪种节点。</param>
 public sealed record JoinTokenDto(string Id, string? Note, IReadOnlyList<string> Labels, bool AutoApprove, int MaxUses, int Uses, DateTimeOffset ExpiresAt, DateTimeOffset? RevokedAt, DateTimeOffset CreatedAt, string Role = "agent");