feat(ui): persist last server and split connection status text

- AppConfig stores LastServerHost/Port/UseSsl; restored on next launch
  so the wallet reconnects to the last-used server instead of defaulting
  to the first bootstrap entry
- Added ConnectionStatusShort for the status bar (short label only);
  ConnectionStatus retains the full "Connesso a ip:porta" shown in the
  server settings overlay

src/App/ViewModels/MainWindowViewModel.Sync.cs

@@ -31,10 +31,13 @@ public partial class MainWindowViewModel
     private bool isServerSettingsOpen;
 
     [RelayCommand]
-    private void OpenServerSettings()
+    private async Task OpenServerSettings()
     {
         IsSettingsOpen = false;
+        RefreshServers();
         IsServerSettingsOpen = true;
+        if (_client is { IsConnected: true })
+            await DiscoverServers();
     }
 
     [RelayCommand]
@@ -43,6 +46,9 @@ public partial class MainWindowViewModel
     [ObservableProperty]
     private string connectionStatus = Loc.Tr("conn.none");
 
+    [ObservableProperty]
+    private string connectionStatusShort = Loc.Tr("conn.none");
+
     [ObservableProperty]
     private bool isConnected;
 
@@ -100,11 +106,24 @@ public partial class MainWindowViewModel
         KnownServers.Clear();
         foreach (var server in Registry.All)
             KnownServers.Add(server);
-        SelectedKnownServer = KnownServers.FirstOrDefault();
-        if (SelectedKnownServer is null)
+
+        if (_config.LastServerHost is { Length: > 0 } savedHost && _config.LastServerPort is { } savedPort)
         {
-            ServerHost = "127.0.0.1";
-            ServerPort = (UseSsl ? Profile.DefaultSslPort : Profile.DefaultTcpPort).ToString();
+            _syncingServerFields = true;
+            UseSsl = _config.LastServerUseSsl;
+            ServerHost = savedHost;
+            ServerPort = savedPort.ToString();
+            SelectedKnownServer = KnownServers.FirstOrDefault(s => s.Host == savedHost);
+            _syncingServerFields = false;
+        }
+        else
+        {
+            SelectedKnownServer = KnownServers.FirstOrDefault();
+            if (SelectedKnownServer is null)
+            {
+                ServerHost = "127.0.0.1";
+                ServerPort = (UseSsl ? Profile.DefaultSslPort : Profile.DefaultTcpPort).ToString();
+            }
         }
     }
 
@@ -176,6 +195,7 @@ public partial class MainWindowViewModel
                 foreach (var (h, p) in candidates)
                 {
                     ConnectionStatus = $"{Loc.Tr("conn.connectingto")} {h}:{p}…";
+                    ConnectionStatusShort = Loc.Tr("conn.connectingto") + "…";
                     try
                     {
                         var pins = new CertificatePinStore(AppPaths.CertificatePinsPath(Net));
@@ -185,10 +205,12 @@ public partial class MainWindowViewModel
                         {
                             IsConnected = false;
                             ConnectionStatus = Loc.Tr("conn.none");
+                            ConnectionStatusShort = Loc.Tr("conn.none");
                         });
                         IsConnected = true;
                         _autoReconnect = true;
-                        ConnectionStatus = Loc.Tr("conn.connectedto");
+                        ConnectionStatus = $"{Loc.Tr("conn.connectedto")} {h}:{p}";
+                        ConnectionStatusShort = Loc.Tr("conn.connectedto");
                         // Update the UI to reflect the server actually connected.
                         _syncingServerFields = true;
                         ServerHost = h;
@@ -196,6 +218,11 @@ public partial class MainWindowViewModel
                         SelectedKnownServer = KnownServers.FirstOrDefault(s => s.Host == h)
                             ?? SelectedKnownServer;
                         _syncingServerFields = false;
+                        // Persist the last-used server so it is restored on next launch.
+                        _config.LastServerHost = h;
+                        _config.LastServerPort = p;
+                        _config.LastServerUseSsl = UseSsl;
+                        _config.Save();
                         lastError = null;
                         break;
                     }
@@ -261,12 +288,14 @@ public partial class MainWindowViewModel
         {
             IsConnected = false;
             ConnectionStatus = Loc.Tr("conn.none");
+            ConnectionStatusShort = Loc.Tr("conn.none");
             StatusMessage = ex.Message;
         }
         catch (Exception ex)
         {
             IsConnected = _client?.IsConnected == true;
             ConnectionStatus = IsConnected ? ConnectionStatus : Loc.Tr("conn.none");
+            ConnectionStatusShort = IsConnected ? Loc.Tr("conn.connectedto") : Loc.Tr("conn.none");
             StatusMessage = $"Errore: {ex.Message}";
             if (_account is not null)
             {

src/App/Views/MainView.axaml

@@ -895,7 +895,7 @@
                              IsVisible="{Binding IsConnected}"/>
                     <Ellipse Width="10" Height="10" Fill="{DynamicResource DangerBrush}" VerticalAlignment="Center"
                              IsVisible="{Binding !IsConnected}"/>
-                    <TextBlock Text="{Binding ConnectionStatus}" FontSize="12"
+                    <TextBlock Text="{Binding ConnectionStatusShort}" FontSize="12"
                                Foreground="{DynamicResource SystemAccentColor}"
                                VerticalAlignment="Center"/>
                 </StackPanel>
@@ -1164,21 +1164,17 @@
                     <TextBlock Text="{Binding Loc[server.title]}"
                                FontSize="18" FontWeight="Bold"/>
 
-                    <!-- Host + port — Desktop: 3 columns -->
-                    <Grid ColumnDefinitions="*,Auto,Auto" RowDefinitions="Auto,Auto"
+                    <!-- Host + port — Desktop: 2 columns -->
+                    <Grid ColumnDefinitions="*,Auto" RowDefinitions="Auto,Auto"
                           IsVisible="{Binding IsDesktop}">
                         <TextBlock Grid.Row="0" Grid.Column="0" Text="{Binding Loc[server.host]}"
                                    FontSize="11" Foreground="{DynamicResource TextSecondaryBrush}"/>
                         <TextBlock Grid.Row="0" Grid.Column="1" Text="{Binding Loc[server.port]}"
                                    FontSize="11" Foreground="{DynamicResource TextSecondaryBrush}" Margin="10,0,0,0" Width="90"/>
-                        <TextBlock Grid.Row="0" Grid.Column="2" Text="TLS"
-                                   FontSize="11" Foreground="{DynamicResource TextSecondaryBrush}" Margin="10,0,0,0"/>
                         <TextBox Grid.Row="1" Grid.Column="0" Text="{Binding ServerHost}"
                                  FontFamily="monospace" Margin="0,2,0,0"/>
                         <TextBox Grid.Row="1" Grid.Column="1" Text="{Binding ServerPort}"
                                  FontFamily="monospace" Width="90" Margin="10,2,0,0"/>
-                        <CheckBox Grid.Row="1" Grid.Column="2" IsChecked="{Binding UseSsl}"
-                                  Margin="10,2,0,0" VerticalAlignment="Center"/>
                     </Grid>
                     <!-- Host + port — Mobile: vertical, larger font -->
                     <StackPanel Spacing="10" IsVisible="{Binding IsMobile}">
@@ -1186,27 +1182,16 @@
                             <TextBlock Text="{Binding Loc[server.host]}" FontSize="13" Foreground="{DynamicResource TextSecondaryBrush}"/>
                             <TextBox Text="{Binding ServerHost}" FontFamily="monospace" FontSize="15"/>
                         </StackPanel>
-                        <Grid ColumnDefinitions="*,Auto">
-                            <StackPanel Grid.Column="0" Spacing="4">
-                                <TextBlock Text="{Binding Loc[server.port]}" FontSize="13" Foreground="{DynamicResource TextSecondaryBrush}"/>
-                                <TextBox Text="{Binding ServerPort}" FontFamily="monospace" FontSize="15"/>
-                            </StackPanel>
-                            <StackPanel Grid.Column="1" Spacing="4" Margin="20,0,0,0"
-                                        VerticalAlignment="Center">
-                                <TextBlock Text="TLS" FontSize="13" Foreground="{DynamicResource TextSecondaryBrush}"
-                                           HorizontalAlignment="Center"/>
-                                <CheckBox IsChecked="{Binding UseSsl}"
-                                          HorizontalAlignment="Center"/>
-                            </StackPanel>
-                        </Grid>
+                        <StackPanel Spacing="4">
+                            <TextBlock Text="{Binding Loc[server.port]}" FontSize="13" Foreground="{DynamicResource TextSecondaryBrush}"/>
+                            <TextBox Text="{Binding ServerPort}" FontFamily="monospace" FontSize="15"/>
+                        </StackPanel>
                     </StackPanel>
 
                     <!-- Actions — Desktop: in a row -->
                     <StackPanel Orientation="Horizontal" Spacing="8" IsVisible="{Binding IsDesktop}">
                         <Button Content="{Binding Loc[wallet.connect]}" Classes="accent"
                                 Command="{Binding ConnectAndSyncCommand}" IsEnabled="{Binding !IsSyncing}"/>
-                        <Button Content="{Binding Loc[wallet.discover]}"
-                                Command="{Binding DiscoverServersCommand}"/>
                         <Button Content="{Binding Loc[wallet.resetcert]}"
                                 Command="{Binding ResetCertificatesCommand}"/>
                     </StackPanel>
@@ -1215,23 +1200,13 @@
                         <Button Content="{Binding Loc[wallet.connect]}" Classes="accent"
                                 Command="{Binding ConnectAndSyncCommand}" IsEnabled="{Binding !IsSyncing}"
                                 HorizontalAlignment="Stretch" HorizontalContentAlignment="Center"/>
-                        <Button Content="{Binding Loc[wallet.discover]}"
-                                Command="{Binding DiscoverServersCommand}"
-                                HorizontalAlignment="Stretch" HorizontalContentAlignment="Center"/>
                         <Button Content="{Binding Loc[wallet.resetcert]}"
                                 Command="{Binding ResetCertificatesCommand}"
                                 HorizontalAlignment="Stretch" HorizontalContentAlignment="Center"/>
                     </StackPanel>
 
                     <!-- Connection status -->
-                    <StackPanel Orientation="Horizontal" Spacing="6">
-                        <Ellipse Width="10" Height="10" Fill="{DynamicResource SuccessBrush}" VerticalAlignment="Center"
-                                 IsVisible="{Binding IsConnected}"/>
-                        <Ellipse Width="10" Height="10" Fill="{DynamicResource DangerBrush}" VerticalAlignment="Center"
-                                 IsVisible="{Binding !IsConnected}"/>
-                        <TextBlock Text="{Binding ConnectionStatus}" Foreground="{DynamicResource TextSecondaryBrush}"
-                                   VerticalAlignment="Center"/>
-                    </StackPanel>
+                    <TextBlock Text="{Binding ConnectionStatus}" Foreground="{DynamicResource TextSecondaryBrush}"/>
 
                     <!-- Known servers: click to populate host/port -->
                     <TextBlock Text="{Binding Loc[server.known]}" FontSize="11" Foreground="{DynamicResource TextSecondaryBrush}"/>

src/Core/Storage/AppConfig.cs

@@ -15,6 +15,11 @@ public sealed class AppConfig
     /// <summary>Display unit for amounts (see <see cref="Wallet.CoinAmount.Units"/>).</summary>
     public string Unit { get; set; } = "PLM";
 
+    /// <summary>Last successfully connected server, persisted across sessions.</summary>
+    public string? LastServerHost { get; set; }
+    public int? LastServerPort { get; set; }
+    public bool LastServerUseSsl { get; set; } = true;
+
     private static readonly JsonSerializerOptions JsonOptions = new() { WriteIndented = true };
 
     public static AppConfig Load(string? path = null)