Improve learning discovery and dashboard i18n

tests/ha/test_history.py

@@ -120,6 +120,28 @@ def test_normalize_state_history_keeps_categorical_changes() -> None:
     assert [point.state for point in result[0].points] == ["off", "on"]
 
 
+def test_normalize_state_history_keeps_light_attribute_changes() -> None:
+    result = normalize_state_history_payload(
+        [
+            [
+                {
+                    "entity_id": "light.office",
+                    "state": "on",
+                    "attributes": {"brightness": 80, "friendly_name": "Office"},
+                    "last_changed": "2026-06-01T08:00:00+00:00",
+                },
+                {
+                    "state": "on",
+                    "attributes": {"brightness": 120, "friendly_name": "Office"},
+                    "last_changed": "2026-06-01T08:05:00+00:00",
+                },
+            ]
+        ]
+    )
+
+    assert [point.attributes["brightness"] for point in result[0].points] == [80, 120]
+
+
 def test_normalize_logbook_preserves_action_origin() -> None:
     result = normalize_logbook_payload(
         [