Feature: WebDAV Sync

ios/Runner/Runner.entitlements

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>keychain-access-groups</key>
+	<array/>
+</dict>
+</plist>

lib/common/consts.dart

@@ -17,6 +17,7 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
 import '../model/app_reminder_config.dart';
+import '../model/app_sync_options.dart';
 import '../model/habit_display.dart';
 import '../model/habit_form.dart';
 import '../theme/color.dart';
@@ -47,6 +48,7 @@ const int appCalendarBarMaxOccupyPrt = 70;
 const int appCalendarBarMinOccupyPrt = 20;
 const int appCalendarBarDefualtOccupyPrt = 50;
 const int kHabitLargeScreenAdaptWidth = 600;
+const int kHabitLargeScreenAdaptHeight = 400;
 //#endregion
 
 //#region l10n
@@ -81,6 +83,10 @@ const defaultSortDirection = HabitDisplaySortDirection.asc;
 const defaultHabitsRecordScrollBehavior = HabitsRecordScrollBehavior.scrollable;
 const defaultFirstDay = DateTime.monday;
 const defaultAppReminder = AppReminderConfig.off;
+const defaultAppSyncTimeout = Duration(seconds: 60);
+const defaultAppSyncConnectTimeout = Duration(seconds: 10);
+const int? defaultAppSyncConnectRetryCount = null; // null for infinity
+const defaultAppSyncFetchInterval = AppSyncFetchInterval.minute5;
 //#endregion
 
 //#region habit-field

lib/model/app_sync_options.dart

@@ -0,0 +1,38 @@
+// Copyright 2025 Fries_I23
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import '../common/enums.dart';
+
+enum AppSyncFetchInterval implements EnumWithDBCode {
+  manual(null),
+  minute5(Duration(minutes: 5)),
+  minute15(Duration(minutes: 15)),
+  minute30(Duration(minutes: 30)),
+  hour1(Duration(hours: 1));
+
+  final Duration? t;
+
+  const AppSyncFetchInterval(this.t);
+
+  @override
+  int get dbCode => t?.inSeconds ?? -1;
+
+  static AppSyncFetchInterval? getFromDBCode(int dbCode,
+      {AppSyncFetchInterval? withDefault = AppSyncFetchInterval.manual}) {
+    for (var value in AppSyncFetchInterval.values) {
+      if (value.dbCode == dbCode) return value;
+    }
+    return withDefault;
+  }
+}