0840efb759
Operator sign-out hardcoded the dev Authentik end-session URL, so prod logout landed on auth.dezky.local. Mirror the portal's env-driven pattern (NUXT_PUBLIC_AUTH_URL/NUXT_PUBLIC_OPERATOR_URL with .local fallbacks). Expose authUrl/operatorUrl via public runtimeConfig and use them for the Authentik admin links and the cosmetic host labels (sidebar, eyebrows, auth-page hints). Portal: signed-out + webmail copy now derive their hosts from runtime config (new public.mailUrl, NUXT_PUBLIC_MAIL_URL in prod).