Avoid per-request discovery classification in dashboard

app/api/v1/actuators.py

@@ -208,7 +208,11 @@ def context_options(
 
 @router.get("/summary", response_model=list[ActuatorSummary])
 def list_configured_summary(request: Request) -> list[ActuatorSummary]:
-    entity_map = {entity.entity_id: entity for entity in _load_cached_entities(request)}
+    records = _service(request).list_configured()
+    entity_map = _load_cached_entity_map(
+        request,
+        {record.actuator_entity_id for record in records},
+    )
     return [
         ActuatorSummary(
             actuator_entity_id=record.actuator_entity_id,
@@ -247,7 +251,7 @@ def list_configured_summary(request: Request) -> list[ActuatorSummary]:
             ),
             updated_at=record.updated_at.isoformat(),
         )
-        for record in _service(request).list_configured()
+        for record in records
     ]
 
 
@@ -259,16 +263,12 @@ def dashboard_overview(request: Request) -> DashboardOverview:
         raw_entities = []
     raw_updated_at = cache_payload.get("updated_at")
     updated_at = raw_updated_at if isinstance(raw_updated_at, str) else None
-    cached_entities = [
-        HaEntitySummary.model_validate(entity)
-        for entity in raw_entities
-        if isinstance(entity, dict)
-    ]
-    discovered = discover_entities(cached_entities) if cached_entities else []
-    group_counts: dict[tuple[str, str], int] = {}
-    for entity in discovered:
-        key = (entity.category, entity.role.value)
-        group_counts[key] = group_counts.get(key, 0) + 1
+    raw_groups = cache_payload.get("discovery_groups", [])
+    cached_groups = [
+        DashboardDiscoveryGroup.model_validate(group)
+        for group in raw_groups
+        if isinstance(group, dict)
+    ] if isinstance(raw_groups, list) else []
     reconciliation = _reconciliation_state_or_default(request)
     ws_status = getattr(request.app.state, "ws_status", None)
     actuators = list_configured_summary(request)
@@ -286,15 +286,12 @@ def dashboard_overview(request: Request) -> DashboardOverview:
             review_required=reconciliation.review_required,
         ),
         cache=EntityCacheStatus(
-            available=bool(cached_entities),
+            available=bool(raw_entities),
             updated_at=updated_at,
-            entity_count=len(cached_entities),
+            entity_count=len(raw_entities),
         ),
         actuators=actuators,
-        discovery_groups=[
-            DashboardDiscoveryGroup(category=category, role=role, count=count)
-            for (category, role), count in sorted(group_counts.items())
-        ],
+        discovery_groups=cached_groups,
     )
 
 
@@ -521,6 +518,30 @@ def _load_cached_entities(request: Request) -> list[HaEntitySummary]:
         return []
 
 
+def _load_cached_entity_map(
+    request: Request,
+    entity_ids: set[str],
+) -> dict[str, HaEntitySummary]:
+    if not entity_ids:
+        return {}
+    payload = _load_entity_cache_payload(request)
+    raw_entities = payload.get("entities", [])
+    if not isinstance(raw_entities, list):
+        return {}
+    result: dict[str, HaEntitySummary] = {}
+    for raw_entity in raw_entities:
+        if not isinstance(raw_entity, dict):
+            continue
+        entity_id = raw_entity.get("entity_id")
+        if not isinstance(entity_id, str) or entity_id not in entity_ids:
+            continue
+        try:
+            result[entity_id] = HaEntitySummary.model_validate(raw_entity)
+        except ValueError:
+            continue
+    return result
+
+
 def _load_entity_cache_payload(request: Request) -> dict[str, object]:
     path = _entity_cache_path(request)
     if not path.exists():
@@ -535,8 +556,16 @@ def _load_entity_cache_payload(request: Request) -> dict[str, object]:
 def _save_cached_entities(request: Request, entities: list[HaEntitySummary]) -> None:
     path = _entity_cache_path(request)
     path.parent.mkdir(parents=True, exist_ok=True)
+    group_counts: dict[tuple[str, str], int] = {}
+    for entity in discover_entities(entities):
+        key = (entity.category, entity.role.value)
+        group_counts[key] = group_counts.get(key, 0) + 1
     payload = {
         "updated_at": datetime.now(timezone.utc).isoformat(),
+        "discovery_groups": [
+            {"category": category, "role": role, "count": count}
+            for (category, role), count in sorted(group_counts.items())
+        ],
         "entities": [entity.model_dump(mode="json") for entity in entities],
     }
     temporary = path.with_suffix(".json.tmp")