R4 the client catches up: follow requests, followers, downvotes, dismissing, filtering a post, quote policies, statistics in detail

Follow requests answered on the persona's own profile and from the Notifications tab; its followers and the accounts it
follows listed there, a follower removed (asked first). Downvotes on threadiverse posts, after the public-vote notice.
A notification dismissed from its line. "Filter this post" from a card's menu, and the Filters page showing the posts a
filter holds. Who may quote the persona's own posts, and revoking a quote of one. Statistics: a server in detail with
"describe again", the ledger's events, the server's own days. The composer deletes an upload taken out before posting.
MediaType.Documents goes.

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

Models/Mastodon/PrivaPubStatus.cs

@@ -94,8 +94,12 @@ public class PrivaPubPlace
 	public string Url { get; set; }
 }
 
+/// <summary>A post's votes: its favourites are its upvotes. PrivaPub sends them on every post; a threadiverse post's
+/// downvotes are the ones that mean something.</summary>
 public class PrivaPubVotes
 {
 	public int Up { get; set; }
 	public int Down { get; set; }
+	/// <summary>The persona's own downvote (POST /api/v1/statuses/:id/downvote, /undownvote); null with no persona.</summary>
+	public bool? Downvoted { get; set; }
 }