fix(i18n): add missing translations for agentHistory, documents, gatewayConfig (#378)

Adds translation keys to en.json and es.json for agentHistory, documents, and gatewayConfig namespaces.

messages/en.json

@@ -1867,5 +1867,59 @@
     "online": "Online",
     "busy": "Busy",
     "errors": "Errors"
+  },
+  "agentHistory": {
+    "title": "Agent History",
+    "eventCount": "Showing {count} events for {agent}",
+    "noAgentSelected": "No agent selected",
+    "status": "Status",
+    "lastSeen": "Last Seen",
+    "lastAction": "Last Action",
+    "tasksAssigned": "Tasks Assigned",
+    "inProgress": "In Progress",
+    "completed": "Completed",
+    "activeSessions": "Active Sessions",
+    "noActivity": "No activity found for {agent}",
+    "eventsBadge": "{count} events",
+    "page": "Page {current} of {total}",
+    "newer": "Newer",
+    "older": "Older"
+  },
+  "documents": {
+    "title": "Documents",
+    "refresh": "Refresh",
+    "searchLabel": "Search Documents",
+    "searchPlaceholder": "Search documentation...",
+    "loading": "Loading...",
+    "searching": "Searching...",
+    "noMatches": "No documents match your search",
+    "noRootsFound": "No documentation roots found",
+    "viewerTitle": "Document Viewer",
+    "viewerDescription": "Select a file to view its contents",
+    "selectFile": "Select a file from the list to view",
+    "updated": "Updated",
+    "loadingDocument": "Loading document..."
+  },
+  "gatewayConfig": {
+    "loading": "Loading...",
+    "configPathHint": "Check your configuration file location",
+    "sidebarTitle": "Configuration",
+    "searchPlaceholder": "Search settings...",
+    "allSettings": "All Settings",
+    "modeForm": "Form",
+    "modeJson": "JSON",
+    "unsavedChanges": "Unsaved changes",
+    "unsavedChangesCount": "{count} changes",
+    "noChanges": "No changes",
+    "reload": "Reload",
+    "save": "Save",
+    "saving": "Saving...",
+    "apply": "Apply",
+    "applying": "Applying...",
+    "updateSystem": "Update",
+    "updating": "Updating...",
+    "loadingSchema": "Loading schema...",
+    "viewPendingChanges": "View {count} pending changes",
+    "noSettingsMatch": "No settings match '{query}'"
   }
 }

messages/es.json

@@ -1865,5 +1865,59 @@
     "online": "En línea",
     "busy": "Ocupado",
     "errors": "Errores"
+  },
+  "agentHistory": {
+    "title": "Historial del Agente",
+    "eventCount": "Mostrando {count} eventos para {agent}",
+    "noAgentSelected": "Ningún agente seleccionado",
+    "status": "Estado",
+    "lastSeen": "Última vez visto",
+    "lastAction": "Última acción",
+    "tasksAssigned": "Tareas asignadas",
+    "inProgress": "En progreso",
+    "completed": "Completadas",
+    "activeSessions": "Sesiones activas",
+    "noActivity": "No se encontró actividad para {agent}",
+    "eventsBadge": "{count} eventos",
+    "page": "Página {current} de {total}",
+    "newer": "Más recientes",
+    "older": "Anteriores"
+  },
+  "documents": {
+    "title": "Documentos",
+    "refresh": "Actualizar",
+    "searchLabel": "Buscar documentos",
+    "searchPlaceholder": "Buscar documentación...",
+    "loading": "Cargando...",
+    "searching": "Buscando...",
+    "noMatches": "Ningún documento coincide con tu búsqueda",
+    "noRootsFound": "No se encontraron raíces de documentación",
+    "viewerTitle": "Visor de documentos",
+    "viewerDescription": "Selecciona un archivo para ver su contenido",
+    "selectFile": "Selecciona un archivo de la lista para ver",
+    "updated": "Actualizado",
+    "loadingDocument": "Cargando documento..."
+  },
+  "gatewayConfig": {
+    "loading": "Cargando...",
+    "configPathHint": "Verifica la ubicación del archivo de configuración",
+    "sidebarTitle": "Configuración",
+    "searchPlaceholder": "Buscar ajustes...",
+    "allSettings": "Todos los ajustes",
+    "modeForm": "Formulario",
+    "modeJson": "JSON",
+    "unsavedChanges": "Cambios sin guardar",
+    "unsavedChangesCount": "{count} cambios",
+    "noChanges": "Sin cambios",
+    "reload": "Recargar",
+    "save": "Guardar",
+    "saving": "Guardando...",
+    "apply": "Aplicar",
+    "applying": "Aplicando...",
+    "updateSystem": "Actualizar",
+    "updating": "Actualizando...",
+    "loadingSchema": "Cargando esquema...",
+    "viewPendingChanges": "Ver {count} cambios pendientes",
+    "noSettingsMatch": "Ningún ajuste coincide con '{query}'"
   }
 }