FollowingReplies
Likes and replies hit real posts
POST /api/v1/feed/:id/like and /replies require bearer auth. MAX_FEED_REPLY caps reply text.
Likes and replies hit real posts. POST /api/v1/feed/:id/like toggles a Like row. Replies validate MAX_FEED_REPLY before insert.
Search following does not like or reply. A 401 does not mint a Like or FeedReply.