fix(i18n): backfill missing admin.ldap translation keys

The admin.ldap message block referenced throughout the LDAP admin
page (t('title'), t('connectionTitle'), t('serverUrl'), field-mapping
and sync labels, etc.) didn't exist in de.json/en.json at all, so the
whole page rendered raw translation keys instead of text -- a
pre-existing gap surfaced while testing the new AD-prefill/group-filter
feature on this same page.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/src/messages/de.json

@@ -280,7 +280,38 @@
       "cannotDeleteActive": "Mandanten mit aktiven Benutzern koennen nicht geloescht werden"
     },
     "ldap": {
+      "title": "LDAP-Konfiguration",
+      "connectionTitle": "Verbindungseinstellungen",
+      "serverUrl": "Server-URL",
+      "baseDn": "Basis-DN",
+      "bindDn": "Bind-DN",
+      "bindPassword": "Bind-Passwort",
+      "searchFilter": "Suchfilter",
+      "save": "Speichern",
+      "testConnection": "Verbindung testen",
+      "testSuccess": "Verbindung erfolgreich",
+      "testFailed": "Verbindung fehlgeschlagen",
+      "enable": "Aktiviert",
+      "disable": "Deaktiviert",
       "bindDnHint": "AD-Format: Domaene\\Benutzername (z.B. ctl\\serviceaccount), keine DN-Schreibweise.",
+      "fieldMapping": {
+        "title": "Feld-Zuordnung",
+        "add": "Zuordnung hinzufuegen",
+        "ldapField": "LDAP-Feld",
+        "tesseraField": "Tessera-Feld",
+        "default": "Standard",
+        "remove": "Entfernen"
+      },
+      "sync": {
+        "title": "Synchronisation",
+        "interval": "Sync-Intervall",
+        "intervalDisabled": "deaktiviert",
+        "lastSync": "Letzte Synchronisation",
+        "neverSynced": "Noch nie synchronisiert",
+        "trigger": "Jetzt synchronisieren",
+        "syncing": "Synchronisiere...",
+        "result": "Erstellt: {created}, aktualisiert: {updated}, deaktiviert: {deactivated}"
+      },
       "groupFilter": {
         "title": "Import-Filter (Gruppen/OUs)",
         "description": "Beschraenkt den Sync auf ausgewaehlte AD-Gruppen oder Organisationseinheiten. Ohne Auswahl werden alle Benutzer unter der Basis-DN importiert.",

apps/web/src/messages/en.json

@@ -280,7 +280,38 @@
       "cannotDeleteActive": "Cannot delete tenants with active users"
     },
     "ldap": {
+      "title": "LDAP configuration",
+      "connectionTitle": "Connection settings",
+      "serverUrl": "Server URL",
+      "baseDn": "Base DN",
+      "bindDn": "Bind DN",
+      "bindPassword": "Bind password",
+      "searchFilter": "Search filter",
+      "save": "Save",
+      "testConnection": "Test connection",
+      "testSuccess": "Connection successful",
+      "testFailed": "Connection failed",
+      "enable": "Enabled",
+      "disable": "Disabled",
       "bindDnHint": "AD format: domain\\username (e.g. ctl\\serviceaccount), not DN notation.",
+      "fieldMapping": {
+        "title": "Field mapping",
+        "add": "Add mapping",
+        "ldapField": "LDAP field",
+        "tesseraField": "Tessera field",
+        "default": "Default",
+        "remove": "Remove"
+      },
+      "sync": {
+        "title": "Synchronization",
+        "interval": "Sync interval",
+        "intervalDisabled": "disabled",
+        "lastSync": "Last sync",
+        "neverSynced": "Never synced",
+        "trigger": "Sync now",
+        "syncing": "Syncing...",
+        "result": "Created: {created}, updated: {updated}, deactivated: {deactivated}"
+      },
       "groupFilter": {
         "title": "Import filter (groups/OUs)",
         "description": "Restrict sync to selected AD groups or organizational units. With no selection, every user under the base DN is imported.",