feat: hardwareInfo + listSystemAiCuratedModels RPCs (v0.7.0)

Regenerated protos pick up the two new HubAdmin RPCs. HubClient
exposes them as hardwareInfo() and listSystemAiCuratedModels(),
with HardwareInfoResponse, ListSystemAiCuratedModelsResponse,
CuratedModel re-exported as typedefs so callers don't import
the generated/ directory directly.

Studio uses the pair to colour-code models in the System-AI
editor against the operator's actual hardware.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/src/hub_client.dart

@@ -49,6 +49,10 @@ typedef AskAiResponse = pb.AskAiResponse;
 typedef ListSystemAiModelsResponse = pb.ListSystemAiModelsResponse;
 typedef SystemAiModel = pb.SystemAiModel;
 typedef PullSystemAiModelResponse = pb.PullSystemAiModelResponse;
+typedef HardwareInfoResponse = pb.HardwareInfoResponse;
+typedef ListSystemAiCuratedModelsResponse =
+    pb.ListSystemAiCuratedModelsResponse;
+typedef CuratedModel = pb.CuratedModel;
 typedef ModuleInfoResponse = pb.ModuleInfoResponse;
 typedef FlowSummary = pb.FlowSummary;
 typedef StoreEntry = pb.StoreEntry;
@@ -273,6 +277,23 @@ class HubClient {
     ));
   }
 
+  /// Detected host hardware. Cached server-side; cheap to call.
+  /// Returned tier is one of `tiny`/`small`/`balanced`/`large`/
+  /// `unknown`. See `docs/architecture/system-ai.md` →
+  /// "Hardware tiers".
+  Future<HardwareInfoResponse> hardwareInfo() {
+    return _admin.hardwareInfo(Empty());
+  }
+
+  /// Bundled curated model database. Used by Studio's editor
+  /// to colour-code models by hardware suitability. Refresh
+  /// requires a hub redeploy — `lastReviewed` shows how stale
+  /// the curation is.
+  Future<ListSystemAiCuratedModelsResponse>
+      listSystemAiCuratedModels() {
+    return _admin.listSystemAiCuratedModels(Empty());
+  }
+
   /// Search the hub's bundled store index. All filters are
   /// optional; an empty query returns the first [limit] entries
   /// the index ships with.