Pinned posts on profiles, and pinning from the card

A profile shows the posts the account pins above its posts (pinned=true: for an account elsewhere, what it features,
which PrivaPub now keeps); the persona pins and unpins its own public and unlisted posts from the card's menu, and
PrivaPub tells its followers. tests/e2e/Actions/PinTests.cs pins from the card and finds the post first on the profile;
the whole e2e suite passes against the reseeded village (122, 4 skipped).

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

Pages/Profile.razor

@@ -147,7 +147,17 @@
 			</DTabs>
 
 			<div class="flex flex-col gap-4">
-				@foreach (var post in posts)
+				@if (tab is ProfileTab.Posts && pinned.Count > 0)
+				{
+					<div class="flex flex-col gap-4" data-pinned>
+						<span class="badge badge-ghost gap-1 self-start"><i aria-hidden="true" class="ion-md-pin"></i>@Localizer["Pinned"]</span>
+						@foreach (var post in pinned)
+						{
+							<Content @key="post.Key" Post="post" FilterIn="FilterContext.Account" OnDeleted="Remove" OnTag="OpenTag" />
+						}
+					</div>
+				}
+				@foreach (var post in posts.Where(p => tab is not ProfileTab.Posts || !pinnedKeys.Contains(p.Key)))
 				{
 					<Content @key="post.Key" Post="post" FilterIn="FilterContext.Account" OnDeleted="Remove" OnTag="OpenTag" />
 				}
@@ -182,6 +192,8 @@
 	Account account;
 	Relationship relationship;
 	List<FeedPost> posts = [];
+	List<FeedPost> pinned = [];
+	HashSet<string> pinnedKeys = [];
 	ProfileTab tab = ProfileTab.Posts;
 	string maxId;
 	string loadedId;
@@ -234,6 +246,8 @@
 		}
 		relationship = account.Id == CascadingState.PersonaId ? null : await AccountService.Relationship(account.Id);
 		await LoadLists();
+		pinned = await AccountService.Pinned(account.Id);
+		pinnedKeys = [.. pinned.Select(p => p.Key)];
 		posts = [];
 		maxId = null;
 		IsLoading = false;
@@ -329,7 +343,11 @@
 		});
 	}
 
-	void Remove(FeedPost post) => posts.RemoveAll(p => p.Key == post.Key);
+	void Remove(FeedPost post)
+	{
+		posts.RemoveAll(p => p.Key == post.Key);
+		pinned.RemoveAll(p => p.Key == post.Key);
+	}
 
 	async Task OpenTag(string tagName)
 	{