fix(storage): Fixed an issue with the SFTP path history (#1077)

* fix(storage): Fixed an issue with the SFTP path history

Added path validity checks when processing the SFTP path history

Standardized the format of stored paths and removed extra slashes

* refactor(sftp): Standardize SFTP path handling and optimize resource management

Extract path normalization logic into a separate method: _normalizeSftpPath
Ensure that the SFTP client is properly closed after use

lib/view/page/storage/sftp.dart

@@ -99,7 +99,16 @@ class _SftpPageState extends ConsumerState<SftpPage> with AfterLayoutMixin {
     if (Stores.setting.sftpOpenLastPath.fetch()) {
       final history = Stores.history.sftpLastPath.fetch(widget.args.spi.id);
       if (history != null) {
-        initPath = history;
+        SftpClient? sftp;
+        try {
+          final normalizedHistory = _normalizeSftpPath(history);
+          sftp = await _client.sftp();
+          await sftp.listdir(normalizedHistory);
+          initPath = normalizedHistory;
+        } catch (_) {
+        } finally {
+          sftp?.close();
+        }
       }
     }
 
@@ -639,7 +648,8 @@ extension _Actions on _SftpPageState {
 
           // Only update history when success
           if (Stores.setting.sftpOpenLastPath.fetch()) {
-            Stores.history.sftpLastPath.put(widget.args.spi.id, listPath);
+            final normalizedPath = _normalizeSftpPath(listPath);
+            Stores.history.sftpLastPath.put(widget.args.spi.id, normalizedPath);
           }
 
           return true;
@@ -789,6 +799,8 @@ extension _Actions on _SftpPageState {
   }
 }
 
+String _normalizeSftpPath(String path) => path.replaceAll(RegExp(r'/+'), '/');
+
 String? _getDecompressCmd(String filename) {
   for (final ext in _extCmdMap.keys) {
     if (filename.endsWith('.$ext')) {