Merge branch 'dev' into claude/demo-mock-entity-state

Three small demo/mock fixes:

- Mocked entities dropped unit_of_measurement and state_class when
  writing to the state machine, so demo sensors rendered without a unit
  and the mocked history returned a single state for them
- The energy consumption sensor entity id had a stray tab, which fails
  entity id validation in cards that render it
- Switching demos saved the dashboard config before the new registries
  and entities reached the dashboard, so dashboard strategies generated
  against the previous data

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KZ6ydA22VeQndgynH4SxCV

demo/src/configs/demo-configs.ts

@@ -43,6 +43,13 @@ export const setDemoConfig = async (
   setDemoAreas(hass, config.areas);
   hass.addEntities(config.entities(hass.localize), true);
   hass.addEntities(energyEntities());
+
+  // Let the new registries and entities reach the dashboard before saving the
+  // config, so dashboard strategies generate against them
+  await new Promise((resolve) => {
+    setTimeout(resolve, 0);
+  });
+
   lovelace.saveConfig(config.lovelace(hass.localize));
   applyDemoTheme(hass, config.theme);
 };

demo/src/stubs/entities.ts

@@ -85,7 +85,7 @@ export const energyEntities = () =>
       },
     },
     "sensor.energy_consumption_tarif_1": {
-      entity_id: "sensor.energy_consumption_tarif_1	",
+      entity_id: "sensor.energy_consumption_tarif_1",
       state: "88.6",
       attributes: {
         last_reset: "1970-01-01T00:00:00:00+00",

src/fake_data/entities/base-entity.ts

@@ -130,6 +130,8 @@ export class MockBaseEntity {
       "entity_picture",
       "assumed_state",
       "device_class",
+      "state_class",
+      "unit_of_measurement",
       "supported_features",
     ]) {
       if (key in attrs) {