Improve campaign personalization and contact duplicate handling.

Add merge tags for email/SMS, paginated removable recipients, PCM event panels for postcard campaigns, and a portal modal when phone/address matches an existing contact.

site/messaging/providers/sms/smtp2go.py

@@ -5,6 +5,8 @@ import logging
 import requests
 from django.conf import settings
 
+from messaging.services import render_merge_tags
+
 logger = logging.getLogger(__name__)
 
 
@@ -21,6 +23,7 @@ def send_sms(message) -> str:
     body = message.body_snapshot or campaign.body_override or (
         campaign.template.body if campaign.template else ""
     )
+    body = render_merge_tags(body, contact)
 
     payload = {
         "api_key": api_key,