Rework dashboard loading and cache entity metadata

tests/api/test_actuators.py

@@ -213,6 +213,23 @@ def test_manual_assignment_endpoint_updates_context(tmp_path: Path) -> None:
     ]
 
 
+def test_summary_is_lightweight_and_uses_cached_entity_metadata(tmp_path: Path) -> None:
+    with TestClient(app) as client:
+        _install_service(tmp_path)
+        client.get("/v1/actuators/discovery")
+        client.post("/v1/actuators", json={"actuator_entity_id": "light.abstellkammer"})
+
+        response = client.get("/v1/actuators/summary")
+
+    assert response.status_code == 200
+    payload = response.json()
+    assert payload[0]["actuator_entity_id"] == "light.abstellkammer"
+    assert payload[0]["friendly_name"] == "Abstellkammer Licht"
+    assert payload[0]["area_name"] == "Abstellkammer"
+    assert "behavior" not in payload[0]
+    assert "numeric_candidates" not in payload[0]
+
+
 def test_context_options_returns_learnable_entities(tmp_path: Path) -> None:
     with TestClient(app) as client:
         _install_service(tmp_path)