fix file transfer load/save config, opt breadCrumbScroll

flutter/lib/desktop/pages/file_manager_page.dart

@@ -93,6 +93,7 @@ class _FileManagerPageState extends State<FileManagerPage>
       Wakelock.enable();
     }
     debugPrint("File manager page init success with id ${widget.id}");
+    model.onDirChanged = breadCrumbScrollToEnd;
     // register location listener
     _locationNodeLocal.addListener(onLocalLocationFocusChanged);
     _locationNodeRemote.addListener(onRemoteLocationFocusChanged);
@@ -100,7 +101,7 @@ class _FileManagerPageState extends State<FileManagerPage>
 
   @override
   void dispose() {
-    model.onClose();
+    model.onClose().whenComplete(() {
       _ffi.close();
       _ffi.dialogManager.dismissAll();
       if (!Platform.isLinux) {
@@ -111,6 +112,7 @@ class _FileManagerPageState extends State<FileManagerPage>
       _locationNodeRemote.removeListener(onRemoteLocationFocusChanged);
       _locationNodeLocal.dispose();
       _locationNodeRemote.dispose();
+    });
     super.dispose();
   }
 
@@ -636,7 +638,6 @@ class _FileManagerPageState extends State<FileManagerPage>
             }),
             IconButton(
                 onPressed: () {
-                  breadCrumbScrollToEnd(isLocal);
                   model.refresh(isLocal: isLocal);
                 },
                 splashRadius: kDesktopIconButtonSplashRadius,
@@ -999,9 +1000,7 @@ class _FileManagerPageState extends State<FileManagerPage>
   }
 
   openDirectory(String path, {bool isLocal = false}) {
-    model.openDirectory(path, isLocal: isLocal).then((_) {
+    model.openDirectory(path, isLocal: isLocal);
-      breadCrumbScrollToEnd(isLocal);
-    });
   }
 
   void handleDragDone(DropDoneDetails details, bool isLocal) {

flutter/lib/mobile/pages/file_manager_page.dart

@@ -32,15 +32,17 @@ class _FileManagerPageState extends State<FileManagerPage> {
           .showLoading(translate('Connecting...'), onCancel: closeConnection);
     });
     gFFI.ffiModel.updateEventListener(widget.id);
+    model.onDirChanged = (_) => breadCrumbScrollToEnd();
     Wakelock.enable();
   }
 
   @override
   void dispose() {
-    model.onClose();
+    model.onClose().whenComplete(() {
       gFFI.close();
       gFFI.dialogManager.dismissAll();
       Wakelock.disable();
+    });
     super.dispose();
   }
 
@@ -309,7 +311,6 @@ class _FileManagerPageState extends State<FileManagerPage> {
                 }
                 if (entries[index].isDirectory || entries[index].isDrive) {
                   model.openDirectory(entries[index].path);
-                  breadCrumbScrollToEnd();
                 } else {
                   // Perform file-related tasks.
                 }

flutter/lib/models/file_model.dart

@@ -42,6 +42,9 @@ class FileModel extends ChangeNotifier {
   /// JobTable <jobId, JobProgress>
   final _jobTable = List<JobProgress>.empty(growable: true).obs;
 
+  /// `isLocal` bool
+  Function(bool)? onDirChanged;
+
   RxList<JobProgress> get jobTable => _jobTable;
 
   bool get isLocal => _isSelectedLocal;
@@ -354,10 +357,12 @@ class FileModel extends ChangeNotifier {
     await bind.sessionLoadLastTransferJobs(id: '${parent.target?.id}');
   }
 
-  onClose() {
+  Future<void> onClose() async {
     parent.target?.dialogManager.dismissAll();
     jobReset();
 
+    onDirChanged = null;
+
     // save config
     Map<String, String> msgMap = {};
 
@@ -367,7 +372,7 @@ class FileModel extends ChangeNotifier {
     msgMap["remote_show_hidden"] = _remoteOption.showHidden ? "Y" : "";
     final id = parent.target?.id ?? "";
     for (final msg in msgMap.entries) {
-      bind.sessionPeerOption(id: id, name: msg.key, value: msg.value);
+      await bind.sessionPeerOption(id: id, name: msg.key, value: msg.value);
     }
     _currentLocalDir.clear();
     _currentRemoteDir.clear();
@@ -421,6 +426,7 @@ class FileModel extends ChangeNotifier {
         _currentRemoteDir = fd;
       }
       notifyListeners();
+      onDirChanged?.call(isLocal);
     } catch (e) {
       debugPrint("Failed to openDirectory $path: $e");
     }