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

@@ -46,6 +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;
 
@@ -103,6 +106,18 @@ public partial class MainWindowViewModel
         KnownServers.Clear();
         foreach (var server in Registry.All)
             KnownServers.Add(server);
+
+        if (_config.LastServerHost is { Length: > 0 } savedHost && _config.LastServerPort is { } savedPort)
+        {
+            _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)
             {
@@ -110,6 +125,7 @@ public partial class MainWindowViewModel
                 ServerPort = (UseSsl ? Profile.DefaultSslPort : Profile.DefaultTcpPort).ToString();
             }
         }
+    }
 
     private (string Host, int Port) ParseServer()
     {
@@ -179,6 +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));
@@ -188,10 +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")} {h}:{p}";
+                        ConnectionStatusShort = Loc.Tr("conn.connectedto");
                         // Update the UI to reflect the server actually connected.
                         _syncingServerFields = true;
                         ServerHost = h;
@@ -199,6 +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;
                     }
@@ -264,12 +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>

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)