fix: Add validation on the message length in Vue (#2209)

Co-authored-by: Nithin David Thomas <webofnithin@gmail.com>

app/javascript/dashboard/components/widgets/conversation/ReplyBox.vue

@@ -186,10 +186,12 @@ export default {
       if (this.isPrivate) {
         return MESSAGE_MAX_LENGTH.GENERAL;
       }
-
       if (this.isAFacebookInbox) {
         return MESSAGE_MAX_LENGTH.FACEBOOK;
       }
+      if (this.isATwilioWhatsappChannel) {
+        return MESSAGE_MAX_LENGTH.TWILIO_WHATSAPP;
+      }
       if (this.isATwilioSMSChannel) {
         return MESSAGE_MAX_LENGTH.TWILIO_SMS;
       }

app/javascript/shared/helpers/MessageTypeHelper.js

@@ -6,5 +6,6 @@ export const MESSAGE_MAX_LENGTH = {
   GENERAL: 10000,
   FACEBOOK: 640,
   TWILIO_SMS: 160,
+  TWILIO_WHATSAPP: 1600,
   TWEET: 280,
 };