Fix some known issues and add some new functions

lib/presentation/widgets/folder_picker.dart

@@ -2,6 +2,7 @@ import 'package:cloudreve4_flutter/data/models/file_model.dart';
 import 'package:cloudreve4_flutter/services/file_service.dart';
 import 'package:flutter/material.dart';
 import '../../core/utils/app_logger.dart';
+import '../../core/utils/file_utils.dart';
 
 /// 文件夹选择器
 class FolderPicker extends StatefulWidget {
@@ -61,7 +62,7 @@ class _FolderPickerState extends State<FolderPicker> {
 
   void _enterFolder(FileModel folder) {
     setState(() {
-      _currentPath = folder.path;
+      _currentPath = folder.relativePath;
     });
     _loadFolders();
   }
@@ -80,7 +81,10 @@ class _FolderPickerState extends State<FolderPicker> {
           child: ConstrainedBox(
             constraints: BoxConstraints(
               maxHeight: widget.maxVisibleItems != null
-                  ? (widget.maxVisibleItems! * 56.0 + 40.0).clamp(80.0, maxHeight)
+                  ? (widget.maxVisibleItems! * 56.0 + 40.0).clamp(
+                      80.0,
+                      maxHeight,
+                    )
                   : maxHeight,
             ),
             child: _buildListContent(context, primaryColor),
@@ -108,7 +112,10 @@ class _FolderPickerState extends State<FolderPicker> {
           children: [
             Icon(Icons.folder_off, size: 48, color: Colors.grey.shade400),
             const SizedBox(height: 12),
-            Text('此文件夹为空', style: TextStyle(color: Colors.grey.shade600, fontSize: 14)),
+            Text(
+              '此文件夹为空',
+              style: TextStyle(color: Colors.grey.shade600, fontSize: 14),
+            ),
           ],
         ),
       );
@@ -146,7 +153,13 @@ class _FolderPickerState extends State<FolderPicker> {
             ),
             const SizedBox(width: 12),
             Expanded(
-              child: Text(folder.name, style: const TextStyle(fontSize: 15, fontWeight: FontWeight.w500)),
+              child: Text(
+                folder.name,
+                style: const TextStyle(
+                  fontSize: 15,
+                  fontWeight: FontWeight.w500,
+                ),
+              ),
             ),
             Icon(Icons.chevron_right, color: Colors.grey.shade400, size: 20),
           ],
@@ -156,7 +169,7 @@ class _FolderPickerState extends State<FolderPicker> {
   }
 
   Widget _buildBreadcrumb(BuildContext context, Color primaryColor) {
-    final pathParts = _currentPath.split('/');
+    final pathParts = FileUtils.toRelativePath(_currentPath).split('/');
     pathParts.removeWhere((part) => part.isEmpty);
 
     return Column(
@@ -180,8 +193,8 @@ class _FolderPickerState extends State<FolderPicker> {
                       ),
                       ...pathParts.asMap().entries.expand((entry) {
                         final index = entry.key;
-                        final part = entry.value;
-                        final path = '/${pathParts.sublist(0, index + 1).join('/')}';
+                        final path =
+                            '/${pathParts.sublist(0, index + 1).join('/')}';
 
                         return [
                           Padding(
@@ -194,7 +207,7 @@ class _FolderPickerState extends State<FolderPicker> {
                           ),
                           _buildBreadcrumbItem(
                             context,
-                            name: part,
+                            name: FileUtils.decodePathSegment(entry.value),
                             path: path,
                             isLast: index == pathParts.length - 1,
                             primaryColor: primaryColor,
@@ -208,13 +221,14 @@ class _FolderPickerState extends State<FolderPicker> {
               const SizedBox(width: 12),
               FilledButton.tonal(
                 onPressed: () {
-                  final relative = _currentPath.startsWith('cloudreve://my')
-                      ? _currentPath.replaceFirst('cloudreve://my', '')
-                      : _currentPath;
+                  final relative = FileUtils.toRelativePath(_currentPath);
                   widget.onFolderSelected(relative.isEmpty ? '/' : relative);
                 },
                 style: FilledButton.styleFrom(
-                  padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 16,
+                    vertical: 8,
+                  ),
                 ),
                 child: const Text('选择'),
               ),