R8 the Mastodon API made real: featured tags, endorsements, notes, notify and languages, suggestions, the direct stream

Featured tags per persona (/api/v1/featured_tags, suggestions, tags/:name/feature, accounts' featured tags, max 10),
listed at /tattoos as Hashtags and sent as Add/Remove{Hashtag} to followers on the featured collection, as Mastodon
sends them; remote accounts' tags received and read from featuredTags. Endorsements (pin/endorse) and private notes
(PersonaNote) kept per persona and never federated; the relationship's notifying, languages, endorsed and note, with
follow's notify (status notifications) and languages (home filter). Reading preferences set on /clientapi. Suggestions
v1/v2 with dismissals and staff picks, never the persona or a sibling. conversation events on the direct stream.
translate, annual reports and the admin API answer. New collections backed up and removed with their persona.

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

PrivaPub.ClientModels/User/Avatar/PersonaPreferences.cs

@@ -0,0 +1,29 @@
+using PrivaPub.ClientModels.Resources;
+
+using System.ComponentModel.DataAnnotations;
+
+namespace PrivaPub.ClientModels.User.Avatar
+{
+	// How a persona's clients show what others post (R8): Mastodon's reading:expand:media ("default" hides media marked
+	// sensitive, "show_all", "hide_all") and reading:expand:spoilers, which GET /api/v1/preferences answers. Mastodon's API
+	// sets neither, so they are set here: GET and POST /clientapi/avatar/private/preferences, for the login's own persona.
+	public class ViewPersonaPreferences
+	{
+		public string AvatarId { get; set; }
+		public string ExpandMedia { get; set; }
+		public bool ExpandSpoilers { get; set; } = false;
+	}
+
+	public class PersonaPreferencesForm
+	{
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource)),
+			Display(Name = nameof(AvatarId), ResourceType = typeof(FieldsNameResource))]
+		public string AvatarId { get; set; }
+
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource)),
+			StringLength(16, ErrorMessageResourceName = "StringLength", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string ExpandMedia { get; set; }//"default", "show_all" or "hide_all"
+
+		public bool ExpandSpoilers { get; set; } = false;
+	}
+}