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.ClientModels/Admin/ViewAnnouncement.cs

@@ -0,0 +1,47 @@
+using PrivaPub.ClientModels.Resources;
+
+using System.ComponentModel.DataAnnotations;
+
+namespace PrivaPub.ClientModels.Admin
+{
+	// an announcement as the administrator's page shows it (/clientapi/admin/announcements/list): its Markdown and what it
+	// renders to, whether it is published and shown now, how many personas dismissed it and its reactions
+	public class ViewAnnouncement
+	{
+		public string Id { get; set; }
+		public string Text { get; set; }
+		public string Html { get; set; }
+		public DateTime? StartsAt { get; set; }
+		public DateTime? EndsAt { get; set; }
+		public bool AllDay { get; set; } = false;
+		public bool IsPublished { get; set; } = false;
+		public bool IsShown { get; set; } = false;//published and not ended
+		public DateTime? PublishedAt { get; set; }
+		public DateTime CreatedAt { get; set; }
+		public DateTime UpdatedAt { get; set; }
+		public long Reads { get; set; } = 0;
+		public List<ViewAnnouncementReaction> Reactions { get; set; } = [];
+	}
+
+	public class ViewAnnouncementReaction
+	{
+		public string Name { get; set; }
+		public long Count { get; set; } = 0;
+	}
+
+	// insert (no Id) and update (its Id)
+	public class AnnouncementForm
+	{
+		[StringLength(64, ErrorMessageResourceName = "StringLength", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string Id { get; set; }
+
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource)),
+			StringLength(5000, ErrorMessageResourceName = "StringLength", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string Text { get; set; }//Markdown
+
+		public DateTime? StartsAt { get; set; }
+		public DateTime? EndsAt { get; set; }//once past, it is no longer shown
+		public bool AllDay { get; set; } = false;
+		public bool IsPublished { get; set; } = false;
+	}
+}