Add room creation options endpoint and integrate with chat UI: Implement getRoomCreateOptions in ChatController and ChatService, add corresponding API route, and enhance MultiChatDialog for room creation with localized labels and validation. Update i18n files for new room creation features.

frontend/src/i18n/locales/es/chat.json

@@ -37,6 +37,52 @@
                 "connected": "Conectado",
                 "disconnected": "Desconectado",
                 "error": "Error de conexión"
+            },
+            "reloadRooms": "Recargar salas",
+            "createRoom": {
+                "toggleShowChat": "Mostrar chat",
+                "toggleCreateRoom": "Crear sala",
+                "title": "Crear nueva sala",
+                "commandPrefix": "Comando",
+                "labels": {
+                    "roomName": "Nombre de la sala",
+                    "visibility": "Visibilidad",
+                    "gender": "Género",
+                    "minAge": "min_age",
+                    "maxAge": "max_age",
+                    "password": "Contraseña",
+                    "rightId": "right_id",
+                    "typeId": "type_id",
+                    "friendsOnly": "friends_only=true"
+                },
+                "placeholders": {
+                    "roomName": "p. ej. Lounge",
+                    "password": "sin espacios"
+                },
+                "options": {
+                    "none": "(ninguno)"
+                },
+                "actions": {
+                    "create": "Crear sala",
+                    "reset": "Restablecer"
+                },
+                "validation": {
+                    "roomNameRequired": "El nombre de la sala es obligatorio.",
+                    "minAgeInvalid": "min_age debe ser >= 0.",
+                    "maxAgeInvalid": "max_age debe ser >= 0.",
+                    "ageRangeInvalid": "min_age no puede ser mayor que max_age.",
+                    "passwordSpaces": "La contraseña no debe contener espacios.",
+                    "rightIdInvalid": "right_id debe ser > 0.",
+                    "typeIdInvalid": "type_id debe ser > 0."
+                },
+                "messages": {
+                    "noConnection": "Sin conexión con el servidor de chat.",
+                    "invalidForm": "Corrige los datos del formulario de sala.",
+                    "roomNameMissing": "Introduce un nombre de sala.",
+                    "sent": "Creación de sala enviada: {command}"
+                },
+                "rights": {},
+                "types": {}
             }
         },
         "randomchat": {