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- index.html: load https://auth.queo.ru/widget.js - auth.ts: openLogin() opens widget modal; useAuth() subscribes to widget onAuthChange so login in any tab updates the app instantly. Falls back to hosted login redirect if widget isn't loaded yet. - App.tsx: render Landing page for unauthenticated state instead of hard redirect. Display username; add Logout button to topbar and Forbidden screen. Header uses username || email || sub. - api.ts: throw ApiError(401) on 401 instead of redirecting — App.tsx re-fetches /api/me and shows the landing. - @doc-manager/shared AuthPayload: email is optional now, username and displayName accepted. Backend /api/me returns username. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>