Send branded HTML emails and harden SMTP2GO webhooks.

Fix campaign stuck on sending under async queue, and stop UUID ValidationError when SMTP2GO tests send "Headers Unavailable".

site/messaging/views.py

@@ -1,5 +1,6 @@
 import hashlib
 import hmac
+import logging
 
 from django.conf import settings
 from django.contrib import messages
@@ -38,6 +39,8 @@ from messaging.webhooks import (
     process_smtp2go_sms_webhook,
 )
 
+logger = logging.getLogger(__name__)
+
 
 def _audience_choices() -> list[tuple[str, str]]:
     """Labeled audience options with live opted-in counts."""
@@ -256,6 +259,11 @@ def campaign_detail(request, pk):
 def campaign_status_json(request, pk):
     """JSON snapshot for live-updating the campaign report page."""
     campaign = get_object_or_404(Campaign, pk=pk)
+    # Async queue may finish after enqueue; re-evaluate completion on poll.
+    from messaging.services import refresh_campaign_status
+
+    refresh_campaign_status(campaign)
+    campaign.refresh_from_db()
     ctx = _campaign_report(campaign)
     return JsonResponse(
         {
@@ -580,7 +588,11 @@ def email_webhook(request):
     ):
         return HttpResponseForbidden("invalid webhook token")
     payload = parse_webhook_payload(request)
-    event = process_smtp2go_email_webhook(payload)
+    try:
+        event = process_smtp2go_email_webhook(payload)
+    except Exception:  # noqa: BLE001 — never 500 SMTP2GO (they retry for 48h)
+        logger.exception("SMTP2GO email webhook processing failed")
+        return JsonResponse({"ok": False, "error": "processing_failed"}, status=200)
     return JsonResponse(
         {
             "ok": True,