Add a 'Search Engine Indexing' toggle under Settings -> General. Off (the
default) emits robots noindex/nofollow in the document head - the safe default
for a private webmail; on lets an admin opt the deployment into indexing.
Backed by the existing admin config-manager (SEARCH_ENGINE_INDEXING env var /
admin override / revert), read server-side in the root generateMetadata().
The PWA install prompt was hardcoded English regardless of the selected UI
language (and the large English block tripped Chrome's translate popup on
Android). Add a pwa_install namespace to all 17 locales, switch the component
to useTranslations, and move <PWAInstallPrompt /> from (main)/layout into
(main)/[locale]/layout so it renders inside the IntlProvider. The title keeps
the dynamic {appName}, so per-domain branding still applies.
The root (main)/layout renders <html> ABOVE the [locale] segment, so next-intl's
getLocale() returns the default locale there - emitting <html lang="en"> on every
page regardless of UI language (e.g. /de) and a hardcoded English <head>
description. Both are strong "translate this page" triggers in Chrome.
proxy.ts already exposes the nonce to server components via the
x-middleware-request-* mechanism; expose the request pathname the same way as
x-pathname, and have the root layout derive the locale from it (falling back to
getLocale() when the path has no locale segment) for both <html lang> and the
localized meta_description (new key in all 17 locales; the English value is
unchanged).
