fix(domains): provision routes when domains are linked

routes/domains.py

@@ -112,12 +112,22 @@ def create_domain_api():
         if not domain_manager:
             return jsonify({'error': 'Domain service not available'}), 503
 
-        data = request.get_json()
+        data = request.get_json(silent=True) or {}
         subdomain = '' if data.get('useUsernameDomain') is True else data.get('subdomain')
-        server_id = data.get('serverId')
+        server_id = data.get('serverId') or None
 
         if subdomain is None:
             return jsonify({'error': 'Subdomain name required'}), 400
+        if server_id and not isinstance(server_id, str):
+            return jsonify({'error': 'Server ID must be a string'}), 400
+
+        server = None
+        if server_id:
+            server = get_server_by_id(server_id)
+            if not server or server.get('owner_id') != user['id']:
+                return jsonify({'error': 'Server not found or access denied'}), 404
+            if server.get('type') not in ('website', 'vps'):
+                return jsonify({'error': 'Domain can only be linked to Website or VPS servers'}), 400
 
         # Check if subdomain is available
         availability_result = domain_manager.check_domain_availability(subdomain, user['username'])
@@ -143,10 +153,16 @@ def create_domain_api():
             db_domain = create_domain_record(domain_record)
 
             if db_domain:
+                routing_ready = not server_id or db_domain.get('server_id') == server_id
+
                 return jsonify({
                     'success': True,
                     'domain': db_domain,
-                    'message': result['message']
+                    'message': result['message'] if routing_ready else (
+                        'Domain created, but routing could not be provisioned. '
+                        'It remains unlinked; retry linking it after checking Kubernetes.'
+                    ),
+                    'routingReady': routing_ready
                 }), 201
             else:
                 return jsonify({'error': 'Domain created in DNS but failed to save to database'}), 500