feat: no titlebar on macOS

Fixes #136

lib/view/page/storage/local.dart

@@ -22,6 +22,7 @@ import '../../../core/utils/ui.dart';
 import '../../../data/model/app/path_with_prefix.dart';
 import '../../../data/res/path.dart';
 import '../../../data/res/ui.dart';
+import '../../widget/custom_appbar.dart';
 import '../../widget/fade_in.dart';
 import 'sftp_mission.dart';
 
@@ -64,7 +65,7 @@ class _LocalStoragePageState extends State<LocalStoragePage> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(
+      appBar: CustomAppBar(
         leading: IconButton(
           icon: const BackButtonIcon(),
           onPressed: () {

lib/view/page/storage/sftp.dart

@@ -26,6 +26,7 @@ import '../../../data/provider/sftp.dart';
 import '../../../data/res/path.dart';
 import '../../../data/res/ui.dart';
 import '../../../locator.dart';
+import '../../widget/custom_appbar.dart';
 import '../../widget/fade_in.dart';
 import '../../widget/input_field.dart';
 import '../../widget/two_line_text.dart';
@@ -74,7 +75,7 @@ class _SftpPageState extends State<SftpPage> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(
+      appBar: CustomAppBar(
         leading: IconButton(
           icon: const BackButtonIcon(),
           onPressed: () {

lib/view/page/storage/sftp_mission.dart

@@ -13,6 +13,7 @@ import '../../../core/utils/ui.dart';
 import '../../../data/model/sftp/req.dart';
 import '../../../data/provider/sftp.dart';
 import '../../../data/res/ui.dart';
+import '../../widget/custom_appbar.dart';
 import '../../widget/round_rect_card.dart';
 
 class SftpMissionPage extends StatefulWidget {
@@ -34,11 +35,8 @@ class _SftpMissionPageState extends State<SftpMissionPage> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(
-        title: Text(
-          _s.mission,
-          style: textSize18,
-        ),
+      appBar: CustomAppBar(
+        title: Text(_s.mission, style: textSize18),
       ),
       body: _buildBody(),
     );