message: Suggest `@room` when `@channel`, `@everyone`, or `@here` is typed in composer
diff: @@ -43,7 +43,9 @@ export default class NotifProvider extends AutocompleteProvider {
  if (!this.room.currentState.mayTriggerNotifOfType('room', client.credentials.userId)) return [];
  const { command, range } = this.getCurrentCommand(query, selection, force);
  - if (command && command[0] && '@room'.startsWith(command[0]) && command[0].length > 1) {
  + if (command?.[0].length > 1 &&
  + ['@room', '@channel', '@everyone', '@here'].some(c => c.startsWith(command[0]))
  + ) {
  return [{
  completion: '@room',
  completionId: '@room',
  