Filters: made on /filters, applied by each card where it is

The persona's filters (PrivaPub's /api/v2/filters): made, given words and
whole-word rules, contexts, an action and an expiry on /filters (linked from
Settings), and deleted; posts filtered one by one can be taken out. Every
status says which filters it matches; each page tells its cards where they
are (home and lists, notifications, public feeds, the thread around the
opened post, profiles), and a card leaves its post out (hide), folds it
behind the filter's title with a way to show it anyway (warn), or blurs its
media (blur). The e2e test folds and then hides a post of the persona's own.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

Models/Mastodon/Filter.cs

@@ -0,0 +1,80 @@
+using System.Text.Json.Serialization;
+
+namespace decePubClient.Models.Mastodon;
+
+/// <summary>A persona's filter (Mastodon's v2 filters): words and posts it would rather not see in some contexts, to be
+/// warned about, hidden or blurred. Statuses carry the filters they match (Status.Filtered); the client applies the
+/// context and the action.</summary>
+public class Filter
+{
+	public string Id { get; set; }
+	public string Title { get; set; }
+	public List<FilterContext> Context { get; set; } = [];
+	public DateTime? ExpiresAt { get; set; }
+	public FilterAction FilterAction { get; set; } = FilterAction.Warn;
+	public List<FilterKeyword> Keywords { get; set; } = [];
+	public List<FilterStatus> Statuses { get; set; } = [];
+
+	public bool IsActive => ExpiresAt is null || ExpiresAt > DateTime.UtcNow;
+}
+
+public class FilterKeyword
+{
+	public string Id { get; set; }
+	public string Keyword { get; set; }
+	public bool WholeWord { get; set; }
+}
+
+public class FilterStatus
+{
+	public string Id { get; set; }
+	public string StatusId { get; set; }
+}
+
+public class FilterResult
+{
+	public Filter Filter { get; set; }
+	public List<string> KeywordMatches { get; set; } = [];
+	public List<string> StatusMatches { get; set; } = [];
+}
+
+/// <summary>Where a filter applies; a card is told which of these it is shown in.</summary>
+[JsonConverter(typeof(JsonStringEnumConverter<FilterContext>))]
+public enum FilterContext
+{
+	[JsonStringEnumMemberName("home")] Home,
+	[JsonStringEnumMemberName("notifications")] Notifications,
+	[JsonStringEnumMemberName("public")] Public,
+	[JsonStringEnumMemberName("thread")] Thread,
+	[JsonStringEnumMemberName("account")] Account
+}
+
+[JsonConverter(typeof(JsonStringEnumConverter<FilterAction>))]
+public enum FilterAction
+{
+	/// <summary>The post is folded behind the filter's title.</summary>
+	[JsonStringEnumMemberName("warn")] Warn,
+	/// <summary>The post is not shown at all.</summary>
+	[JsonStringEnumMemberName("hide")] Hide,
+	/// <summary>The post's media are blurred, as sensitive media are.</summary>
+	[JsonStringEnumMemberName("blur")] Blur
+}
+
+/// <summary>What making or changing a filter sends; ExpiresIn 0 means never.</summary>
+public class FilterForm
+{
+	public string Title { get; set; }
+	public List<FilterContext> Context { get; set; } = [];
+	public FilterAction FilterAction { get; set; } = FilterAction.Warn;
+	public int? ExpiresIn { get; set; }
+	public List<FilterKeywordForm> KeywordsAttributes { get; set; } = [];
+}
+
+public class FilterKeywordForm
+{
+	public string Id { get; set; }
+	public string Keyword { get; set; }
+	public bool WholeWord { get; set; }
+	[JsonPropertyName("_destroy")]
+	public bool? Destroy { get; set; }
+}

Models/Mastodon/Status.cs

@@ -42,6 +42,8 @@ public class Status
 	public Quote Quote { get; set; }
 	/// <summary>Emoji reactions (PrivaPub sends Pleroma's and Misskey's forms as one list).</summary>
 	public List<EmojiReaction> EmojiReactions { get; set; } = [];
+	/// <summary>The persona's filters this post matches, whatever their context (the card picks those of where it is).</summary>
+	public List<FilterResult> Filtered { get; set; } = [];
 	public int QuotesCount { get; set; }
 }