refactor(ui): remove redundant "Open wallet from file" menu item

The wizard already covers opening existing wallets; a separate file-picker
entry in the menu duplicates that flow without adding value. Remove the menu
item, its click handler, the OpenFromPath VM method, and the loc key.

src/App/Localization/Loc.cs

@@ -45,7 +45,6 @@ public sealed class Loc
         // Menu                                                it                                          en                              es                                      fr                                          pt                                          de
         ["menu.file"]             = ["_File",                                                             "_File",                        "_Archivo",                             "_Fichier",                                 "_Arquivo",                                 "_Datei"],
         ["menu.file.new"]         = ["Nuovo / ripristina wallet…",                                        "New / restore wallet…",        "Nuevo / restaurar wallet…",            "Nouveau / restaurer le wallet…",           "Novo / restaurar carteira…",               "Neu / Wallet wiederherstellen…"],
-        ["menu.file.open"]        = ["Apri wallet da file…",                                              "Open wallet from file…",       "Abrir wallet desde archivo…",          "Ouvrir le wallet depuis un fichier…",      "Abrir carteira de arquivo…",               "Wallet aus Datei öffnen…"],
 ["menu.file.close"]       = ["Chiudi wallet",                                                     "Close wallet",                 "Cerrar wallet",                        "Fermer le wallet",                         "Fechar carteira",                          "Wallet schließen"],
         ["menu.file.quit"]        = ["Esci",                                                               "Quit",                         "Salir",                                "Quitter",                                  "Sair",                                     "Beenden"],
         ["menu.net"]              = ["_Rete",                                                             "_Network",                     "_Red",                                 "_Réseau",                                  "_Rede",                                    "_Netzwerk"],

src/App/ViewModels/MainWindowViewModel.Wizard.cs

@@ -477,41 +477,6 @@ public partial class MainWindowViewModel
         }
     }
 
-    public void OpenFromPath(string path)
-    {
-        var newLock = WalletLock.TryAcquire(path);
-        if (newLock is null) { StatusMessage = Loc.Tr("msg.wallet.locked"); return; }
-
-        try
-        {
-            var doc = WalletStore.Load(path);
-            if (IsWalletOpen)
-                CloseWallet();
-            OpenLoaded(doc, WalletLoader.ToAccount(doc), path, password: null, newLock);
-        }
-        catch (WrongPasswordException)
-        {
-            newLock.Dispose();
-            if (IsWalletOpen)
-                CloseWallet();
-            _pendingOpenPath = path;
-            WalletFileExists = true;
-            PasswordInput = "";
-            SetupStep = StepOpen;
-            StatusMessage = "";
-        }
-        catch (UnauthorizedAccessException)
-        {
-            newLock.Dispose();
-            StatusMessage = Loc.Tr("msg.wallet.noaccess");
-        }
-        catch (Exception ex)
-        {
-            newLock.Dispose();
-            StatusMessage = $"Errore: {ex.Message}";
-        }
-    }
-
     [RelayCommand]
     private void NewWallet()
     {

src/App/Views/MainView.axaml

@@ -31,8 +31,6 @@
         <Menu Grid.Row="0" IsVisible="{Binding IsDesktop}">
             <MenuItem Header="{Binding Loc[menu.file]}">
                 <MenuItem Header="{Binding Loc[menu.file.new]}" Command="{Binding NewWalletCommand}"/>
-                <MenuItem Header="{Binding Loc[menu.file.open]}" Click="OnOpenWalletFileClick"
-                          IsVisible="{Binding IsDesktop}"/>
                 <Separator/>
                 <MenuItem Header="{Binding Loc[menu.file.close]}" Command="{Binding CloseWalletCommand}"
                           IsEnabled="{Binding IsWalletOpen}"/>

src/App/Views/MainView.axaml.cs

@@ -23,25 +23,6 @@ public partial class MainView : UserControl
         InitializeComponent();
     }
 
-    private async void OnOpenWalletFileClick(object? sender, RoutedEventArgs e)
-    {
-        if (DataContext is not MainWindowViewModel vm) return;
-        if (TopLevel.GetTopLevel(this)?.StorageProvider is not { } storage) return;
-
-        var files = await storage.OpenFilePickerAsync(new FilePickerOpenOptions
-        {
-            Title = "Apri file wallet",
-            AllowMultiple = false,
-            FileTypeFilter =
-            [
-                new FilePickerFileType("Wallet Palladium") { Patterns = ["*.wallet.json", "*.json"] },
-            ],
-        });
-
-        if (files.FirstOrDefault()?.TryGetLocalPath() is { } path)
-            vm.OpenFromPath(path);
-    }
-
     private void OnHistoryRowDoubleTapped(object? sender, TappedEventArgs e)
     {
         if (sender is not ListBox lb || DataContext is not MainWindowViewModel vm) return;