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

tests/e2e/Actions/ListTests.cs

@@ -1,5 +1,3 @@
-using System.Net;
-using System.Net.Http.Headers;
 using System.Text.Json.Nodes;
 
 using decePubClient.E2E.Support;
@@ -13,19 +11,8 @@ namespace decePubClient.E2E.Actions
 	// answer to the persona's token, so the page and the server agree on the list, its members and its posts.
 	public sealed class ListTests(Browser browser)
 	{
-		static async Task<JsonNode> Api(Pasture.Persona persona, string path, HttpMethod method = null, JsonObject body = null)
-		{
-			using var http = Pasture.Http();
-			using var request = new HttpRequestMessage(method ?? HttpMethod.Get, Pasture.Api + path);
-			if (body is not null)
-				request.Content = new StringContent(body.ToJsonString(), System.Text.Encoding.UTF8, "application/json");
-			request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", persona.Token);
-			using var response = await http.SendAsync(request);
-			if (response.StatusCode == HttpStatusCode.NotFound)
-				return null;
-			response.EnsureSuccessStatusCode();
-			return JsonNode.Parse(await response.Content.ReadAsStringAsync());
-		}
+		static Task<JsonNode> Api(Pasture.Persona persona, string path, HttpMethod method = null, JsonObject body = null) =>
+			PersonaApi.Call(persona, path, method, body);
 
 		// an account the persona follows that has written something
 		static async Task<JsonNode> Followed(Pasture.Persona persona) =>