fix type issues

src/Umbraco.Web.UI.Client/src/backoffice/media/media/repository/sources/media.detail.server.data.ts

@@ -51,6 +51,7 @@ export class UmbMediaDetailServerDataSource implements RepositoryDetailDataSourc
 	 */
 	async createScaffold(parentKey: string | null) {
 		const data: MediaDetails = {
+			$type: '',
 			key: '',
 			name: '',
 			icon: '',

src/Umbraco.Web.UI.Client/src/backoffice/settings/data-types/repository/sources/data-type.server.data.ts

@@ -55,6 +55,7 @@ export class UmbDataTypeServerDataSource implements RepositoryDetailDataSource<D
 	 */
 	async createScaffold(parentKey: string | null) {
 		const data: DataTypeModel = {
+			$type: '',
 			parentKey: parentKey,
 		};
 
@@ -77,9 +78,10 @@ export class UmbDataTypeServerDataSource implements RepositoryDetailDataSource<D
 		// TODO: use resources when end point is ready:
 		return tryExecuteAndNotify<DataTypeModel>(
 			this.#host,
+			// TODO: avoid this any?..
 			DataTypeResource.postDataType({
 				requestBody,
-			})
+			}) as any
 		);
 	}