message: add numbers as allowed characters
diff: @@ -8,7 +8,7 @@ export class SaveFileService {
  save(name: string, content: string) {
  const filename = name
  - .replace(/[^a-zA-Z -]/g, '') // remove special characters
  + .replace(/[^a-zA-Z0-9 -]/g, '') // remove special characters
  .replace(/ /g, '-') // replace space by dashes
  .replace(/-+/g, '-') // trim multiple dashes
  + '.json';
  