Get rid of private API on macos

apps/readest-app/src/services/appService.ts

@@ -26,6 +26,7 @@ import {
 export abstract class BaseAppService implements AppService {
   localBooksDir: string = '';
   abstract isAppDataSandbox: boolean;
+  abstract isNativeWindow: boolean;
   abstract fs: FileSystem;
 
   abstract resolvePath(fp: string, base: BaseDir): { baseDir: number; base: BaseDir; fp: string };

apps/readest-app/src/services/nativeAppService.ts

@@ -115,6 +115,7 @@ export const nativeFileSystem: FileSystem = {
 export class NativeAppService extends BaseAppService {
   fs = nativeFileSystem;
   isAppDataSandbox = isMobile;
+  isNativeWindow = osType() === 'macos';
 
   override resolvePath(fp: string, base: BaseDir): { baseDir: number; base: BaseDir; fp: string } {
     return resolvePath(fp, base);