Redirect sign-in and register links to a beta landing page

Public registrations on app.happydomain.org are paused. Route the
sign-in, register, and join entry points to a new /beta/ page that
explains the beta program and points users to self-hosting via the
binary or Docker image.

i18n/en.yaml

@@ -258,7 +258,7 @@
 - id: beta-alert-title
   translation: "Online version closed, beta access only"
 - id: beta-alert-text
-  translation: "Public registrations are paused. Join the beta program to get early access."
+  translation: 'happyDomain is evolving: soon, continuously test your domains'' security and monitor every service exposed through DNS — with zero configuration. We''re rolling out this new version progressively to gather feedback and deliver the best possible service. <a href="/en/beta/">Learn more</a>.'
 - id: beta-alert-button
   translation: "Join the beta"
 

i18n/fr.yaml

@@ -257,7 +257,7 @@
 - id: beta-alert-title
   translation: "Version en ligne fermée, accès bêta uniquement"
 - id: beta-alert-text
-  translation: "Les inscriptions publiques sont suspendues. Rejoignez le programme bêta pour un accès anticipé."
+  translation: 'happyDomain se transforme : bientôt, testez en continu la sécurité de vos domaines et supervisez l''ensemble des services exposés via le DNS, sans configuration. Nous déployons cette nouvelle version progressivement pour recueillir vos retours et offrir le meilleur service possible. <a href="/fr/beta/">En savoir plus</a>.'
 - id: beta-alert-button
   translation: "Rejoindre la bêta"