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

Administration's Pleroma placeholders give way to real sections: Instance (title, descriptions, contact, thumbnail,
privacy policy, terms, the weekly activity), Rules, Announcements, Relays, Media limits and the Moderation log, next to
Reports, blocked servers (now published or obfuscated), statistics and backups; moderators see Reports and the log. Every
save sends the whole settings form built from the latest read, since PrivaPub replaces what it carries. /about shows the
server's documents to anyone. The report dialog picks the rules a violation breaks, and reports show them. Announcements
show above the feed tabs, dismissed and reacted to, live from the user stream. Login names the server.

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

Services/AnnouncementService.cs

@@ -0,0 +1,48 @@
+using System.Net;
+
+using decePubClient.Extensions;
+using decePubClient.Models;
+using decePubClient.Models.Mastodon;
+
+using PrivaPub.ClientModels;
+
+namespace decePubClient.Services
+{
+	/// <summary>
+	/// The administrators' announcements as the current persona reads them (/api/v1/announcements): the ones shown now,
+	/// dismissed one by one, and reacted to with a unicode emoji (eight different ones at most on each). Dismissals and
+	/// reactions are the persona's own and never leave PrivaPub; the stream tells of new, changed and removed ones
+	/// (StreamingService.Announced). The administrators write them through InstanceAdminService.
+	/// </summary>
+	public class AnnouncementService(IHttpService httpService, ILoggingService logger, CoalescingStringLocalizer localizer)
+	{
+		/// <summary>The announcements shown now, with whether the persona dismissed each.</summary>
+		public async Task<List<Announcement>> List(CancellationToken cancellationToken = default)
+		{
+			using var response = await httpService.Get(APIs.Mastodon.GET_Announcements, cancellationToken: cancellationToken);
+			if (response.IsSuccessStatusCode)
+				return await response.MastodonReadFromJsonAsync<List<Announcement>>(cancellationToken) ?? [];
+
+			var result = await response.Content.ReadWebResult(response.StatusCode, localizer, cancellationToken);
+			if (result.StatusCode is not (int)HttpStatusCode.Gone)
+				await logger.ProcessWarning(result.ToString(localizer), $"{nameof(AnnouncementService)}.{nameof(List)}", cancellationToken);
+			return [];
+		}
+
+		public async Task<WebResult> Dismiss(string announcementId, CancellationToken cancellationToken = default)
+		{
+			using var response = await httpService.Post(APIs.Mastodon.POST_M_DismissAnnouncement(announcementId), cancellationToken: cancellationToken);
+			return response.IsSuccessStatusCode ? new WebResult() : await response.Content.ReadWebResult(response.StatusCode, localizer, cancellationToken);
+		}
+
+		/// <summary>Adds the persona's reaction, or takes it back; PrivaPub refuses anything but one unicode emoji (422).</summary>
+		public async Task<WebResult> React(string announcementId, string emoji, bool add, CancellationToken cancellationToken = default)
+		{
+			var route = APIs.Mastodon.M_AnnouncementReaction(announcementId, emoji);
+			using var response = add
+				? await httpService.Put(route, cancellationToken: cancellationToken)
+				: await httpService.Delete(route, cancellationToken: cancellationToken);
+			return response.IsSuccessStatusCode ? new WebResult() : await response.Content.ReadWebResult(response.StatusCode, localizer, cancellationToken);
+		}
+	}
+}