fix: sftp mission error display

lib/view/page/server/edit.dart

@@ -68,7 +68,7 @@ class _ServerEditPageState extends State<ServerEditPage> {
 
       /// List in dart is passed by pointer, so you need to copy it here
       _tags.addAll(spi.tags ?? []);
-      
+
       _altUrlController.text = spi.alterUrl ?? '';
       _autoConnect.value = spi.autoConnect ?? true;
       _jumpServer.value = spi.jumpId;

lib/view/page/storage/sftp_mission.dart

@@ -52,6 +52,20 @@ class _SftpMissionPageState extends State<SftpMissionPage> {
   }
 
   Widget _buildItem(SftpReqStatus status) {
+    final err = status.error;
+    if (err != null) {
+      return _wrapInCard(
+        status: status,
+        subtitle: l10n.error,
+        trailing: IconButton(
+          onPressed: () => context.showRoundDialog(
+            title: Text(l10n.error),
+            child: Text(err.toString()),
+          ),
+          icon: const Icon(Icons.error),
+        ),
+      );
+    }
     switch (status.status) {
       case SftpWorkerStatus.finished:
         final time = status.spentTime.toString();