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The blueprint page was dark-only and English-only. It now carries the same two controls the workspace TopBar has, in the nav's top-right cluster: ◐ flips light/dark (a paper palette for the same funnel — surfaces and ink flip, the amber/red accents stay) and VI/EN flips the language, with the whole page of copy, the FAQ, the pricing tables and the VIP badge all following it. Amber text switches to a darker #a16207 on the light theme so it keeps ~4.9:1 on white. The register account is back as the old landing had it: a "ĐĂNG KÝ" button pointing at /app?auth=1, and that URL now actually opens the auth dialog on its sign-up tab (AuthModal takes an initialMode). The nav also collapses to the hamburger below 1160px now, and the logo/tools shrink below 680px, so the row still fits a 360px phone.