R5 the server's own settings: instance, rules, announcements, relays, media limits, the staff's log

A singleton ServerSettings (title, descriptions, contact, thumbnail, privacy policy, terms, rules, relays, media
overrides, PublishActivity), cached by InstanceSettings and read by the instance API, NodeInfo, the instance actor, the
web pages and the mailer; its defaults are the old literals, so nothing changes until an administrator edits.
/clientapi/admin/settings (and /thumbnail), /announcements, /relays for administrators; /clientapi/moderator/log, the
staff's log (AdminAction, written by domain blocks, backups, settings and the CLI; no IP, never a root paired with its
personas). The Mastodon API's rules, extended description, privacy policy, terms of service, domain blocks (Published,
Obfuscate), announcements (dismiss, reactions, streaming) and activity (only when published). Reports carry rule ids.
Media overrides clamped to hard caps. Relays named by the settings reconcile next to the configured ones.

Verified: interop.sh instance accounts relay with mastodon, relay, aoderelay and mailpit, 119 passed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WpVCoDeM1qUTRp4fXQdfof

PrivaPub/Federation/Actors/LocalActorService.cs

@@ -104,16 +104,21 @@ namespace PrivaPub.Federation.Actors
 			"abuse", "postmaster", "webmaster", "hostmaster", "security", "noreply", "no_reply", "null", "undefined"
 		};
 
+		// what the instance actor says of itself until the administrator describes the server (ServerSettings)
+		const string InstanceSummary = "The instance actor of this PrivaPub server; it signs the requests no other actor speaks for.";
+
 		readonly DbEntities _dbEntities;
 		readonly IOptionsMonitor<AppConfiguration> _appConfiguration;
+		readonly Domain.Instance.IInstanceSettings _settings;
 		InstanceActor _instanceActor;
 		ReporterActor _reporterActor;
 		ReaderActor _readerActor;
 
-		public LocalActorService(DbEntities dbEntities, IOptionsMonitor<AppConfiguration> appConfiguration)
+		public LocalActorService(DbEntities dbEntities, IOptionsMonitor<AppConfiguration> appConfiguration, Domain.Instance.IInstanceSettings settings)
 		{
 			_dbEntities = dbEntities;
 			_appConfiguration = appConfiguration;
+			_settings = settings;
 		}
 
 		public string BaseAddress => _appConfiguration.CurrentValue.BackendBaseAddress?.TrimEnd('/');
@@ -195,14 +200,18 @@ namespace PrivaPub.Federation.Actors
 		public async Task<LocalActor> GetInstanceActor(CancellationToken token)
 		{
 			var instance = _instanceActor ??= await LoadInstanceActor(token);
+			// the server's name, and its short description once the administrator wrote one of their own
+			var settings = _settings.Current;
 
 			return new LocalActor
 			{
 				Id = instance.ID,
 				Kind = LocalActorKind.Application,
 				UserName = InstanceUserName,
-				Name = "PrivaPub",
-				Summary = "The instance actor of this PrivaPub server; it signs the requests no other actor speaks for.",
+				Name = settings.Title,
+				Summary = string.IsNullOrWhiteSpace(settings.ShortDescription) || settings.ShortDescription == ServerSettings.DefaultDescription
+					? InstanceSummary
+					: settings.ShortDescription,
 				PrivateKeyPem = instance.PrivateKey,
 				PublicKeyPem = instance.PublicKey,
 				Discoverable = false,