Show last error status on integrations. Closes #122.

tests/test_fanout.py

@@ -271,6 +271,35 @@ class TestFanoutManagerDispatch:
         assert statuses["test-id"]["name"] == "Test"
         assert statuses["test-id"]["type"] == "mqtt_private"
 
+    def test_get_statuses_includes_last_error(self):
+        manager = FanoutManager()
+        mod = StubModule()
+        mod._status = "error"
+        mod._last_error = "HTTP 500"
+        manager._modules["test-id"] = (mod, {})
+
+        with patch(
+            "app.repository.fanout._configs_cache",
+            {"test-id": {"name": "Test", "type": "webhook", "enabled": True}},
+        ):
+            statuses = manager.get_statuses()
+
+        assert statuses["test-id"]["status"] == "error"
+        assert statuses["test-id"]["last_error"] == "HTTP 500"
+
+    def test_get_statuses_includes_start_failure_error(self):
+        manager = FanoutManager()
+        manager._module_errors["test-id"] = "ConnectionError: broker down"
+
+        with patch(
+            "app.repository.fanout._configs_cache",
+            {"test-id": {"name": "Test", "type": "mqtt_private", "enabled": True}},
+        ):
+            statuses = manager.get_statuses()
+
+        assert statuses["test-id"]["status"] == "error"
+        assert statuses["test-id"]["last_error"] == "ConnectionError: broker down"
+
 
 # ---------------------------------------------------------------------------
 # Repository tests

tests/test_health_mqtt_status.py

@@ -28,11 +28,17 @@ class TestHealthFanoutStatus:
     async def test_fanout_statuses_reflect_manager(self, test_db):
         """fanout_statuses should return whatever the manager reports."""
         mock_statuses = {
-            "uuid-1": {"name": "Private MQTT", "type": "mqtt_private", "status": "connected"},
+            "uuid-1": {
+                "name": "Private MQTT",
+                "type": "mqtt_private",
+                "status": "connected",
+                "last_error": None,
+            },
             "uuid-2": {
                 "name": "Community MQTT",
                 "type": "mqtt_community",
-                "status": "disconnected",
+                "status": "error",
+                "last_error": "auth failed",
             },
         }
         with patch("app.fanout.manager.fanout_manager") as mock_fm:

tests/test_mqtt.py

@@ -146,6 +146,7 @@ class TestMqttPublisher:
         # After a publish failure, connected should be cleared to stop
         # further attempts and reflect accurate status
         assert pub.connected is False
+        assert pub.last_error == "Network error"
         assert "Primary MQTT" in caplog.text
         assert "usually transient network noise" in caplog.text