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

Pages/ExpandMessage.razor

@@ -4,7 +4,8 @@
 <Title>@Localizer["Thread"]</Title>
 
 @* A post with its thread (/api/v1/statuses/{id}/context): the posts it answers above, the post, the answers below.
-   The cards do their own actions; a reply or a deletion updates the thread here. *@
+   The cards do their own actions; a reply or a deletion updates the thread here. The persona's thread filters apply
+   to the posts around the one it opened, never to that one. *@
 <section class="block relative w-full h-full neo-inset neo-xs rounded-xl">
 	<div class="flex flex-col gap-4 p-4 md:p-5 w-full h-full absolute overflow-y-auto">
 
@@ -32,14 +33,14 @@
 		{
 			@foreach (var post in ancestors)
 			{
-				<Content @key="post.Key" Post="post" CssContainer="ml-6 w-auto" OnDeleted="Remove" OnReplied="Replied" OnTag="OpenTag" />
+				<Content @key="post.Key" Post="post" CssContainer="ml-6 w-auto" FilterIn="FilterContext.Thread" OnDeleted="Remove" OnReplied="Replied" OnTag="OpenTag" />
 			}
 
 			<Content @key="current.Key" Post="current" Highlighted="true" IncludeExpand="false" OnDeleted="Remove" OnReplied="Replied" OnTag="OpenTag" />
 
 			@foreach (var post in descendants)
 			{
-				<Content @key="post.Key" Post="post" CssContainer="ml-6 w-auto" OnDeleted="Remove" OnReplied="Replied" OnTag="OpenTag" />
+				<Content @key="post.Key" Post="post" CssContainer="ml-6 w-auto" FilterIn="FilterContext.Thread" OnDeleted="Remove" OnReplied="Replied" OnTag="OpenTag" />
 			}
 		}
 	</div>