Add toolbar saving

api/lib/src/models/archive.dart

@@ -19,3 +19,4 @@ const kPagesArchiveDirectory = '$kBflyArchiveDirectory/pages';
 const kComponentsArchiveDirectory = '$kBflyArchiveDirectory/components';
 const kStylesArchiveDirectory = '$kBflyArchiveDirectory/styles';
 const kPalettesArchiveDirectory = '$kBflyArchiveDirectory/palettes';
+const kToolbarsArchiveDirectory = '$kBflyArchiveDirectory/toolbars';

api/lib/src/models/data.dart

@@ -552,6 +552,45 @@ final class NoteData extends ArchiveData<NoteData> {
   NoteData removePalette(String name) =>
       removeAsset('$kPalettesArchiveDirectory/$name.json');
 
+  @useResult
+  Iterable<String> getToolbars() =>
+      getAssets('$kToolbarsArchiveDirectory/', true);
+
+  @useResult
+  Iterable<NamedItem<Toolbar>> getNamedToolbars() => getToolbars().map((e) {
+    final toolbar = getToolbar(e);
+    if (toolbar == null) return null;
+    return NamedItem<Toolbar>(name: e, item: toolbar);
+  }).nonNulls;
+
+  @useResult
+  Toolbar? getToolbar(String toolbarName) {
+    final data = getAsset('$kToolbarsArchiveDirectory/$toolbarName.json');
+    if (data == null) {
+      return null;
+    }
+    try {
+      final content = utf8.decode(data);
+      final json = jsonDecode(content) as Map<String, dynamic>;
+      return Toolbar.fromJson(json);
+    } catch (e) {
+      return null;
+    }
+  }
+
+  @useResult
+  NoteData setToolbar(String name, Toolbar toolbar) {
+    final content = jsonEncode(toolbar.toJson());
+    return setAsset(
+      '$kToolbarsArchiveDirectory/$name.json',
+      utf8.encode(content),
+    );
+  }
+
+  @useResult
+  NoteData removeToolbar(String name) =>
+      removeAsset('$kToolbarsArchiveDirectory/$name.json');
+
   @useResult
   String toJson() {
     return base64Encode(exportAsBytes());

api/lib/src/models/pack.dart

@@ -74,6 +74,16 @@ sealed class ButterflyParameter with _$ButterflyParameter {
       _$ButterflyParameterFromJson(json);
 }
 
+@freezed
+sealed class Toolbar extends PackAsset with _$Toolbar {
+  const Toolbar._();
+
+  const factory Toolbar({@Default([]) List<Tool> tools}) = _Toolbar;
+
+  factory Toolbar.fromJson(Map<String, dynamic> json) =>
+      _$ToolbarFromJson(json);
+}
+
 @freezed
 sealed class PackAssetLocation with _$PackAssetLocation {
   const factory PackAssetLocation(String namespace, String key) =