opt.: migrate to new fl_lib (#649)

Fixes #648

lib/core/sync.dart

@@ -2,13 +2,19 @@ import 'dart:io';
 
 import 'package:fl_lib/fl_lib.dart';
 import 'package:server_box/data/model/app/backup.dart';
-import 'package:server_box/data/store/no_backup.dart';
 
 const bakSync = BakSyncer._();
 
+final icloud = ICloud(containerId: 'iCloud.tech.lolli.serverbox');
+
 final class BakSyncer extends SyncIface<Backup> {
   const BakSyncer._() : super();
 
+  @override
+  void init() {
+    Webdav.shared.prefix = 'serverbox/';
+  }
+
   @override
   Future<void> saveToFile() => Backup.backup();
 
@@ -19,21 +25,12 @@ final class BakSyncer extends SyncIface<Backup> {
   }
 
   @override
-  Future<RemoteStorage?> get remoteStorage async {
-    if (isMacOS || isIOS) await icloud.init('iCloud.tech.lolli.serverbox');
-    final settings = NoBackupStore.instance;
-    await webdav.init(WebdavInitArgs(
-      url: settings.webdavUrl.fetch(),
-      user: settings.webdavUser.fetch(),
-      pwd: settings.webdavPwd.fetch(),
-      prefix: 'serverbox/',
-    ));
-
-    final icloudEnabled = settings.icloudSync.fetch();
+  RemoteStorage? get remoteStorage {
+    final icloudEnabled = PrefProps.icloudSync.get();
     if (icloudEnabled) return icloud;
 
-    final webdavEnabled = settings.webdavSync.fetch();
-    if (webdavEnabled) return webdav;
+    final webdavEnabled = PrefProps.webdavSync.get();
+    if (webdavEnabled) return Webdav.shared;
 
     return null;
   }