Skip unexposed entities in intent handlers (#92415)

* Filter intent handler entities by exposure

* Add test for skipping unexposed entities

tests/components/conversation/test_default_agent.py

@@ -174,3 +174,52 @@ async def test_expose_flag_automatically_set(
         new_light: {"should_expose": True},
         test.entity_id: {"should_expose": False},
     }
+
+
+async def test_unexposed_entities_skipped(
+    hass: HomeAssistant,
+    init_components,
+    area_registry: ar.AreaRegistry,
+    entity_registry: er.EntityRegistry,
+) -> None:
+    """Test that unexposed entities are skipped in exposed areas."""
+    area_kitchen = area_registry.async_get_or_create("kitchen")
+
+    # Both lights are in the kitchen
+    exposed_light = entity_registry.async_get_or_create("light", "demo", "1234")
+    entity_registry.async_update_entity(
+        exposed_light.entity_id,
+        area_id=area_kitchen.id,
+    )
+    hass.states.async_set(exposed_light.entity_id, "off")
+
+    unexposed_light = entity_registry.async_get_or_create("light", "demo", "5678")
+    entity_registry.async_update_entity(
+        unexposed_light.entity_id,
+        area_id=area_kitchen.id,
+    )
+    hass.states.async_set(unexposed_light.entity_id, "off")
+
+    # On light is exposed, the other is not
+    expose_entity(hass, exposed_light.entity_id, True)
+    expose_entity(hass, unexposed_light.entity_id, False)
+
+    # Only one light should be turned on
+    calls = async_mock_service(hass, "light", "turn_on")
+    result = await conversation.async_converse(
+        hass, "turn on kitchen lights", None, Context(), None
+    )
+
+    assert len(calls) == 1
+    assert result.response.response_type == intent.IntentResponseType.ACTION_DONE
+
+    # Only one light should be returned
+    hass.states.async_set(exposed_light.entity_id, "on")
+    hass.states.async_set(unexposed_light.entity_id, "on")
+    result = await conversation.async_converse(
+        hass, "how many lights are on in the kitchen", None, Context(), None
+    )
+
+    assert result.response.response_type == intent.IntentResponseType.QUERY_ANSWER
+    assert len(result.response.matched_states) == 1
+    assert result.response.matched_states[0].entity_id == exposed_light.entity_id