Align wiki with the actual v0.6 model (card, anchors[], events, seals, assurance tiers)
wiki: flags in language bars and sidebar Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
wiki: English-primary language convention Translations renamed to lowercase ISO codes (Home-ru, ...); standard language bar on every page; sidebar links only each language's Home so it scales to many languages; RU intro removed from English Home. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>