fix(journal): show remote followers in follower/following lists

countFollowers counts every accepted follow row, but listFollowers
inner-joined users on follower_id — so a federated follower (NULL
follower_id, follower_actor_iri set) bumped the count while never
appearing in the list. Observed live: profile said '1 follower', list
below was empty. listFollowing had the same latent bug for outbound
trails-to-trails follows.

Both lists now left-join users + remote_actors: local entries link to
the local profile as before; remote entries display cached actor data
(IRI parsing as fallback) and link out to the remote profile.

Integration test pins count/list consistency for a remote follower.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/journal/app/components/CollectionPage.tsx

@@ -4,6 +4,9 @@ interface Entry {
   username: string;
   displayName: string | null;
   domain: string;
+  /** Local path (`/users/x`) or, for federated entries, the remote profile URL. */
+  profileUrl: string;
+  remote: boolean;
 }
 
 interface Props {
@@ -42,9 +45,10 @@ export function CollectionPage({ kind, user, entries, page, total }: Props) {
       ) : (
         <ul className="mt-6 divide-y divide-gray-200 rounded-lg border border-gray-200 bg-white">
           {entries.map((entry) => (
-            <li key={entry.username} className="px-4 py-3">
+            <li key={`${entry.username}@${entry.domain}`} className="px-4 py-3">
               <a
-                href={`/users/${entry.username}`}
+                href={entry.profileUrl}
+                {...(entry.remote ? { target: "_blank", rel: "noopener noreferrer" } : {})}
                 className="flex items-center justify-between hover:underline"
               >
                 <span className="text-sm font-medium text-gray-900">