Track email opens and clicks on recipient status.

SMTP2GO open/click webhooks now advance Message to opened/clicked, and the campaign engagement chart uses live stats instead of placeholder bars.

site/messaging/tests.py

@@ -382,7 +382,7 @@ class Smtp2goEmailWebhookTests(TestCase):
             ).exists()
         )
 
-    def test_open_records_event_keeps_delivered(self):
+    def test_open_records_event_sets_opened(self):
         self.message.status = Message.Status.DELIVERED
         self.message.save(update_fields=["status"])
         url = reverse("messaging:email_webhook")
@@ -395,13 +395,46 @@ class Smtp2goEmailWebhookTests(TestCase):
             },
         )
         self.message.refresh_from_db()
-        self.assertEqual(self.message.status, Message.Status.DELIVERED)
+        self.assertEqual(self.message.status, Message.Status.OPENED)
         self.assertTrue(
             ProviderEvent.objects.filter(
                 message=self.message, event_type="open"
             ).exists()
         )
 
+    def test_click_sets_clicked_from_sent(self):
+        url = reverse("messaging:email_webhook")
+        self.client.post(
+            url,
+            data={
+                "event": "click",
+                "rcpt": "pat@example.com",
+                "X-Monica-Message-Id": str(self.message.pk),
+            },
+        )
+        self.message.refresh_from_db()
+        self.assertEqual(self.message.status, Message.Status.CLICKED)
+        self.assertTrue(
+            ProviderEvent.objects.filter(
+                message=self.message, event_type="click"
+            ).exists()
+        )
+
+    def test_open_does_not_downgrade_clicked(self):
+        self.message.status = Message.Status.CLICKED
+        self.message.save(update_fields=["status"])
+        url = reverse("messaging:email_webhook")
+        self.client.post(
+            url,
+            data={
+                "event": "open",
+                "rcpt": "pat@example.com",
+                "X-Monica-Message-Id": str(self.message.pk),
+            },
+        )
+        self.message.refresh_from_db()
+        self.assertEqual(self.message.status, Message.Status.CLICKED)
+
     def test_hard_bounce_suppresses_contact(self):
         url = reverse("messaging:email_webhook")
         self.client.post(
@@ -449,6 +482,9 @@ class Smtp2goEmailWebhookTests(TestCase):
         self.assertEqual(response.status_code, 200)
         data = response.json()
         self.assertEqual(data["stats"]["opens"], 1)
+        self.assertIn("chart_bars", data["stats"])
+        labels = [bar["label"] for bar in data["stats"]["chart_bars"]]
+        self.assertEqual(labels, ["Sent", "Delivered", "Opens", "Clicks", "Failed"])
 
     def test_bearer_authorization_header(self):
         import json