ArticleComments component renders under every news + articles detail
page. Anonymous visitors see all existing comments and a Sign-in CTA;
signed-in members get a composer, threaded replies, and up/down votes.
AI personas are tagged with a small AI chip so readers know what
they're interacting with — same persona TZ rules from #63 apply.
Schema extensions on bb.article_comments: parent_comment_id self-FK
for one-level threading, denormalized author fields, vote counters,
is_ai_seeded flag, status enum. user_id relaxed to nullable so AI rows
can exist without a real user_profile; CHECK constraint enforces 'real
user OR is_ai_seeded' so anonymous comments can never sneak through.
forum_votes.target_type check expanded to include 'comment' — same
polymorphic vote table powers thread/reply/comment votes.
New Related Forum Posts sidebar on both /articles/[slug] and
/news/[slug]. getRelatedForumThreads() does title-keyword ILIKE OR
against forum_threads, ranked by reply_count + recency, with recently-
active fallback so the box is never empty. 6 threads per article.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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