TF-3082 Warn user and save identity cache on reload/session expired

lib/features/public_asset/data/model/public_assets_in_identity_arguments_model.dart

@@ -0,0 +1,28 @@
+import 'package:jmap_dart_client/http/converter/id_converter.dart';
+import 'package:json_annotation/json_annotation.dart';
+import 'package:tmail_ui_user/features/public_asset/domain/model/public_assets_in_identity_arguments.dart';
+
+part 'public_assets_in_identity_arguments_model.g.dart';
+
+@JsonSerializable(converters: [IdConverter()])
+class PublicAssetsInIdentityArgumentsModel extends PublicAssetsInIdentityArguments {
+  PublicAssetsInIdentityArgumentsModel({
+    required super.htmlSignature,
+    required super.preExistingPublicAssetIds,
+    required super.newlyPickedPublicAssetIds});
+
+  factory PublicAssetsInIdentityArgumentsModel.fromJson(Map<String, dynamic> json) 
+    => _$PublicAssetsInIdentityArgumentsModelFromJson(json);
+
+  Map<String, dynamic> toJson() => _$PublicAssetsInIdentityArgumentsModelToJson(this);
+  
+  factory PublicAssetsInIdentityArgumentsModel.fromDomain(
+    PublicAssetsInIdentityArguments publicAssetsInIdentityArguments
+  ) {
+    return PublicAssetsInIdentityArgumentsModel(
+      htmlSignature: publicAssetsInIdentityArguments.htmlSignature,
+      preExistingPublicAssetIds: publicAssetsInIdentityArguments.preExistingPublicAssetIds,
+      newlyPickedPublicAssetIds: publicAssetsInIdentityArguments.newlyPickedPublicAssetIds
+    );
+  }
+}

lib/features/public_asset/presentation/public_asset_controller.dart

@@ -173,6 +173,14 @@ class PublicAssetController extends BaseController {
     preExistingPublicAssetIds = htmlContent.publicAssetIdsFromHtmlContent;
   }
 
+  void restorePreExistingPublicAssetsFromCache(List<PublicAssetId> publicAssetIds) {
+    preExistingPublicAssetIds = publicAssetIds;
+  }
+
+  void restoreNewlyPickedPublicAssetsFromCache(List<PublicAssetId> publicAssetIds) {
+    newlyPickedPublicAssetIds = publicAssetIds;
+  }
+
   void uploadFileToBlob(PlatformFile platformFile) {
     isUploading.value = true;
     _uploadFileToBlobAction(platformFile);