fix(feed): join remote_actors to get proper handle and avatar for remote authors

crates/adapters/postgres/src/feed.rs

@@ -95,15 +95,23 @@ fn feed_select(viewer: Option<uuid::Uuid>) -> String {
         t.in_reply_to_id, t.in_reply_to_url, t.ap_id AS t_ap_id,
         t.visibility, t.content_warning, t.sensitive, t.local AS t_local,
         t.created_at AS thought_created_at, t.updated_at,
-        u.id AS author_id, u.username, u.email, u.password_hash,
-        u.display_name, u.bio, u.avatar_url, u.header_url, u.custom_css,
+        u.id AS author_id,
+        CASE WHEN NOT u.local AND ra.handle IS NOT NULL AND ra.handle != ''
+             THEN '@' || ra.handle ELSE u.username END AS username,
+        u.email, u.password_hash,
+        COALESCE(ra.display_name, u.display_name) AS display_name,
+        u.bio,
+        COALESCE(ra.avatar_url, u.avatar_url) AS avatar_url,
+        u.header_url, u.custom_css,
         u.local AS author_local, u.ap_id AS u_ap_id, u.inbox_url,
         u.created_at AS author_created_at, u.updated_at AS author_updated_at,
         (SELECT COUNT(*) FROM likes l WHERE l.thought_id=t.id) AS like_count,
         (SELECT COUNT(*) FROM boosts b WHERE b.thought_id=t.id) AS boost_count,
         (SELECT COUNT(*) FROM thoughts r WHERE r.in_reply_to_id=t.id) AS reply_count,
         {viewer_checks}
-    FROM thoughts t JOIN users u ON u.id=t.user_id"
+    FROM thoughts t
+    JOIN users u ON u.id=t.user_id
+    LEFT JOIN remote_actors ra ON u.ap_id = ra.url"
     )
 }