- Reworked the tenant admin login page

- Updated the User model to implement Filament’s tenancy contracts
- Seeded a ready-to-use demo tenant (user, tenant, active package, purchase)
- Introduced a branded, translated 403 error page to replace the generic forbidden message for unauthorised admin hits
- Removed the public “Register” links from the marketing header
- hardened join event logic and improved error handling in the guest pwa.

resources/lang/de/auth.php

@@ -12,6 +12,7 @@ return [
         'username_or_email' => 'Username oder E-Mail',
         'password' => 'Passwort',
         'remember' => 'Angemeldet bleiben',
+        'remember_me' => 'Angemeldet bleiben',
         'submit' => 'Anmelden',
     ],
 
@@ -34,6 +35,8 @@ return [
         'notice' => 'Bitte bestätigen Sie Ihre E-Mail-Adresse.',
         'resend' => 'E-Mail erneut senden',
     ],
+    'verify_email' => 'Bitte bestätigen Sie Ihre E-Mail-Adresse. Wir haben dir eine Bestätigungs-E-Mail geschickt.',
+    'no_tenant_associated' => 'Deinem Konto ist kein Tenant zugeordnet. Bitte kontaktiere den Support.',
     'header' => [
         'home' => 'Startseite',
         'packages' => 'Pakete',