I'm trying to create a sms text notification that sends important emails to a persons phone as a text and displays that email message as a text. This is what I have but the problem I have is:

1. I'm trying to create a new button that says "rules" When clicked this button allows the user to add the emails that are going to be important for the user have sent as a text to their phone so that they can read the message on their phone. 2nd. When i click the send sms notification button it wont pop up with "text sent to this phone number".

I will attach the code below ay help would appreciated.

function onGmailMessage(e) {
  console.log(e);
  // Get the ID of the message the user has open.
  var messageId = e.gmail.messageId;

  // Get an access token scoped to the current message and use it for GmailApp
  // calls.
  var accessToken = e.gmail.accessToken;
  GmailApp.setCurrentMessageAccessToken(accessToken);

  // Get the subject of the email.
  var message = GmailApp.getMessageById(messageId);
  var subject = message.getThread().getFirstMessageSubject();

  // Remove labels and prefixes.
  subject = subject
      .replace(/^([rR][eE]|[fF][wW][dD])\:\s*/, '')
      .replace(/^\[.*?\]\s*/, '');

  // If neccessary, truncate the subject to fit in the image.
  subject = truncate(subject);

  return createCatCard(subject);
}

function onGmailCompose(e) {
  console.log(e);
  var header = CardService.newCardHeader()
      .setTitle('Gmail SMS Alerts')
  // Create text input for entering the phone number.
  var input = CardService.newTextInput()
      .setFieldName('text')
      .setTitle('Enter Your Number')
  
  var action = CardService.newAction()
      .setFunctionName('onGmailInsertCat');
  var button = CardService.newTextButton()
      .setText('Send confirmation SMS')
      .setOnClickAction(action)
      .setTextButtonStyle(CardService.TextButtonStyle.FILLED);
  var buttonSet = CardService.newButtonSet()
      .addButton(button);
  // Assemble the widgets and return the card.
  var section = CardService.newCardSection()
      .addWidget(input)
      .addWidget(buttonSet);
  var card = CardService.newCardBuilder()
      .setHeader(header)
      .addSection(section);
  return card.build();
}