feat(domains): Domain registrieren mit Schutz vor Doppelbestellung, Aufträge, Changelog und Anleitung

- Verfügbarkeitsprüfung über DomainStudio, Entwurf mit Kontakten und Nameservern, Zusammenfassung mit System und Preis
- Verbindliches Abschicken: atomarer Anspruch DRAFT -> SUBMITTING vor dem Netzaufruf, genau ein POST /domain ohne Wiederholung, unklarer Ausgang als UNKNOWN, Bindung an das System
- Aufträge: Stand aus dem AutoDNS-Auftrag, Abgleich unklarer Aufträge, Verwerfen erst nach Abgleich
- Reiter Registrieren und Aufträge, Changelog, Anwender- und Administrationshandbuch, Mandantenschutz-Inventar

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

apps/web/src/messages/en.json

@@ -2061,6 +2061,8 @@
       "domains": "Domains",
       "contacts": "Contacts",
       "customers": "Customers",
+      "register": "Register",
+      "orders": "Orders",
       "settings": "Settings"
     },
     "notConfigured": {
@@ -2206,6 +2208,101 @@
       "confirmDelete": "Really delete customer “{name}”?",
       "confirmDeleteYes": "Delete permanently"
     },
+    "register": {
+      "intro": "Check whether a domain is available, choose the contacts and name servers, and register the domain with AutoDNS as a binding order.",
+      "domainLabel": "Domain",
+      "domainPlaceholder": "example.com",
+      "check": "Check availability",
+      "checking": "Checking …",
+      "free": "{domain} is available.",
+      "price": "Price for one year: {price}",
+      "priceUnknown": "Price could not be determined",
+      "notFree": "{domain} is not available and cannot be registered.",
+      "notFreeStatus": "Registry response: {status}",
+      "contactsTitle": "Contacts",
+      "contactsDescription": "Choose a contact from AutoDNS for each role. The owner is required; the admin, technical and zone contacts are preselected and can be changed.",
+      "contactsLoading": "Loading contacts …",
+      "contactsEmpty": "There are no contacts at AutoDNS yet. Create a contact under “Contacts” first.",
+      "choose": "Please choose …",
+      "roles": {
+        "owner": "Owner",
+        "admin": "Admin contact",
+        "tech": "Technical contact",
+        "zone": "Zone contact"
+      },
+      "nameServersTitle": "Name servers",
+      "nameServersDescription": "At least two, at most six. The name servers must already be set up with your provider, otherwise the registration fails.",
+      "nameServer": "Name server {number}",
+      "addNameServer": "Add name server",
+      "removeNameServer": "Remove",
+      "showSummary": "Show summary",
+      "creating": "Preparing …",
+      "summary": {
+        "title": "Summary",
+        "description": "Please check all details. The button below makes the registration binding.",
+        "system": "System",
+        "domain": "Domain",
+        "period": "Term",
+        "periodValue": "1 year",
+        "price": "Price",
+        "nameServers": "Name servers"
+      },
+      "confirmLive": "I confirm the binding registration with AutoDNS, which costs money.",
+      "confirmDemo": "I confirm the registration in the AutoDNS demo system (test mode).",
+      "submit": "Register now (binding)",
+      "submitting": "Submitting …",
+      "cancel": "Cancel",
+      "canceling": "Discarding …",
+      "back": "Back",
+      "submitFailed": "The registration could not be submitted. Please check under “Orders” before you try again.",
+      "result": {
+        "title": "Result",
+        "SUBMITTED": "The registration was handed to AutoDNS and is being processed. You can follow the progress under “Orders”.",
+        "SUCCESS": "The domain was registered.",
+        "FAILED": "AutoDNS did not carry out the registration.",
+        "UNKNOWN": "Outcome unclear",
+        "unknownAdvice": "Tessera could not determine whether AutoDNS accepted the registration. Please do not order the domain again. Check under “Orders”: Tessera compares the order with AutoDNS there.",
+        "toOrders": "Go to orders",
+        "another": "Register another domain"
+      }
+    },
+    "orders": {
+      "intro": "Every registration and its state. Tessera compares open orders with AutoDNS when you open this page and every 30 seconds afterwards.",
+      "refresh": "Refresh",
+      "refreshing": "Comparing …",
+      "loading": "Loading orders …",
+      "empty": "There are no orders yet.",
+      "columns": {
+        "domain": "Domain",
+        "system": "System",
+        "status": "Status",
+        "confirmed": "Confirmed"
+      },
+      "environment": {
+        "DEMO": "Demo",
+        "LIVE": "Live"
+      },
+      "status": {
+        "DRAFT": "Draft",
+        "SUBMITTING": "Submitting",
+        "SUBMITTED": "In progress",
+        "SUPPORT": "Query pending",
+        "SUCCESS": "Registered",
+        "FAILED": "Failed",
+        "UNKNOWN": "Outcome unclear",
+        "CANCELED": "Discarded"
+      },
+      "confirmedBy": "{user}, {date}",
+      "notConfirmed": "–",
+      "supportHint": "AutoDNS has a query about this order. Please contact AutoDNS or InterNetX.",
+      "unknownUnchecked": "Tessera has not checked with AutoDNS yet. Click “Refresh”. Please do not order the domain again.",
+      "unknownChecked": "AutoDNS found neither the domain nor a matching order. For safety, check in AutoDNS itself before you discard the order.",
+      "discard": "Discard",
+      "confirmDiscard": "Really discard this draft?",
+      "confirmDiscardUnknown": "Only discard this order after you have checked in AutoDNS that the domain was not ordered. Otherwise it could be ordered twice.",
+      "discardYes": "Yes, discard",
+      "discardNo": "Cancel"
+    },
     "errors": {
       "request": "The request failed. Please try again.",
       "loadStatus": "The state of the AutoDNS connection could not be loaded."