feat: project registry + per-project filters (stage 1 wire surface)

- listProjects() returns the shared hub's registry (general first;
  sealed areas never appear — they are their own hub instance).
- eventLog, streamEvents and listApprovals take an optional project:
  filter; LoggedEvent, PendingApprovalEntry and FlowSummary carry
  project. Stubs regenerated from the platform's hub.proto.

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

lib/src/generated/chain/v1/hub.pbgrpc.dart

@@ -355,6 +355,19 @@ class HubAdminClient extends $grpc.Client {
     return $createUnaryCall(_$getFlowDefinition, request, options: options);
   }
 
+  /// List the shared hub's project registry (`general` first) —
+  /// the lightweight labels that group flows, runs, approvals and
+  /// audit events. Only `open` and `protected` projects appear:
+  /// sealed projects are their own hub instance and are never
+  /// known to a shared hub (docs/architecture/projects.md).
+  /// Studio's workspace switcher reads this list.
+  $grpc.ResponseFuture<$0.ProjectList> listProjects(
+    $1.Empty request, {
+    $grpc.CallOptions? options,
+  }) {
+    return $createUnaryCall(_$listProjects, request, options: options);
+  }
+
   /// Search the bundled (and Phase 1+: federated) store index for
   /// modules matching a query.
   $grpc.ResponseFuture<$0.StoreSearchResponse> searchStore(
@@ -846,6 +859,10 @@ class HubAdminClient extends $grpc.Client {
           '/chain.v1.HubAdmin/GetFlowDefinition',
           ($0.GetFlowDefinitionRequest value) => value.writeToBuffer(),
           $0.FlowDefinition.fromBuffer);
+  static final _$listProjects = $grpc.ClientMethod<$1.Empty, $0.ProjectList>(
+      '/chain.v1.HubAdmin/ListProjects',
+      ($1.Empty value) => value.writeToBuffer(),
+      $0.ProjectList.fromBuffer);
   static final _$searchStore =
       $grpc.ClientMethod<$0.SearchStoreRequest, $0.StoreSearchResponse>(
           '/chain.v1.HubAdmin/SearchStore',
@@ -1137,6 +1154,13 @@ abstract class HubAdminServiceBase extends $grpc.Service {
             ($core.List<$core.int> value) =>
                 $0.GetFlowDefinitionRequest.fromBuffer(value),
             ($0.FlowDefinition value) => value.writeToBuffer()));
+    $addMethod($grpc.ServiceMethod<$1.Empty, $0.ProjectList>(
+        'ListProjects',
+        listProjects_Pre,
+        false,
+        false,
+        ($core.List<$core.int> value) => $1.Empty.fromBuffer(value),
+        ($0.ProjectList value) => value.writeToBuffer()));
     $addMethod(
         $grpc.ServiceMethod<$0.SearchStoreRequest, $0.StoreSearchResponse>(
             'SearchStore',
@@ -1558,6 +1582,14 @@ abstract class HubAdminServiceBase extends $grpc.Service {
   $async.Future<$0.FlowDefinition> getFlowDefinition(
       $grpc.ServiceCall call, $0.GetFlowDefinitionRequest request);
 
+  $async.Future<$0.ProjectList> listProjects_Pre(
+      $grpc.ServiceCall $call, $async.Future<$1.Empty> $request) async {
+    return listProjects($call, await $request);
+  }
+
+  $async.Future<$0.ProjectList> listProjects(
+      $grpc.ServiceCall call, $1.Empty request);
+
   $async.Future<$0.StoreSearchResponse> searchStore_Pre($grpc.ServiceCall $call,
       $async.Future<$0.SearchStoreRequest> $request) async {
     return searchStore($call, await $request);