feat: implement T-019 reliable event ingress

Brain/tests/test_ui_contract.py

@@ -40,6 +40,22 @@ class UIContractTests(unittest.TestCase):
         self.assertNotRegex(visible_without_script, r"[\U0001F300-\U0001FAFF]")
         self.assertEqual(self.html.count("__BRAIN_DEMO_TOKEN__"), 1)
 
+    def test_reliable_delivery_status_is_visible_without_configuration_details(self) -> None:
+        required = (
+            'id="event-ingress"',
+            'id="ingress-queued"',
+            'id="ingress-dead-letter"',
+            "Outbox 已持久化",
+            "Bell 返回 accepted 或 duplicate 后才计为已送达",
+            "event_ingress: {enabled: false}",
+        )
+        for marker in required:
+            with self.subTest(marker=marker):
+                self.assertIn(marker, self.html)
+        for forbidden in ("bell_url", "key_file", "outbox_path"):
+            with self.subTest(forbidden=forbidden):
+                self.assertNotIn(forbidden, self.html)
+
 
 if __name__ == "__main__":
     unittest.main()