Fix import paths for token_required decorator

backend/app/routes/customer.py

@@ -5,7 +5,7 @@ Customer-specific endpoints with isolation
 from flask import Blueprint, request, jsonify
 from app.models.domain import db, Domain, DNSRecord, CloudflareAccount
 from app.models.user import Customer
-from app.middleware.auth import token_required
+from app.services.auth_service import token_required
 from datetime import datetime
 
 customer_bp = Blueprint('customer', __name__, url_prefix='/api/customer')

backend/app/routes/dns.py

@@ -6,7 +6,7 @@ from datetime import datetime
 from app.models.domain import db, CloudflareAccount, Domain
 from app.services.cloudflare_service import CloudflareService
 from app.services.nameserver_service import NameserverService
-from app.middleware.auth import token_required
+from app.services.auth_service import token_required
 import hashlib
 
 dns_bp = Blueprint('dns', __name__, url_prefix='/api/dns')