feat: multi-server, list view, tags, activity log + UX polish (v2.2)

Proxmox Desktop/Api/ApiClient.cs

@@ -41,6 +41,9 @@ public ApiClient(ServerInfo info)
     public ApiClient(string server, string port, bool skipSsl)
         : this(new ServerInfo(server, int.Parse(port), skipSsl)) { }
 
+    /// <summary>Hostname/IP this client is connected to — used as the friendly server name.</summary>
+    public string Host => _http.BaseAddress!.Host;
+
     // ─── Auth ─────────────────────────────────────────────────────────────────────────
 
     public async Task<List<RealmData>> GetRealmsAsync(CancellationToken ct = default)

Proxmox Desktop/Api/Models/MachineData.cs

@@ -19,9 +19,10 @@ public record MachineData
     [JsonPropertyName("serial")]  public int    Serial  { get; init; }
     [JsonPropertyName("tags")]    public string? Tags   { get; init; }
 
-    // Set by ApiClient after deserialization
-    public string NodeName { get; init; } = string.Empty;
-    public string Type     { get; init; } = string.Empty;
+    // Set by ApiClient / ViewModel after deserialization
+    public string NodeName   { get; init; } = string.Empty;
+    public string Type       { get; init; } = string.Empty;
+    public string ServerName { get; init; } = string.Empty;
 
     // Computed
     public bool   IsRunning    => Status == "running";

Proxmox Desktop/App.xaml.cs

@@ -1,4 +1,6 @@
 using System.Windows;
+using MaterialDesignThemes.Wpf;
+using ProxmoxDesktop.Config;
 using ProxmoxDesktop.Services;
 
 namespace ProxmoxDesktop;
@@ -9,9 +11,23 @@ protected override void OnStartup(StartupEventArgs e)
     {
         base.OnStartup(e);
         NotificationService.Enable();
+        ApplySavedTheme();
         new Views.LoginWindow().Show();
     }
 
+    private static void ApplySavedTheme()
+    {
+        try
+        {
+            var cfg    = new ConfigurationService().Config;
+            var helper = new PaletteHelper();
+            var theme  = helper.GetTheme();
+            theme.SetBaseTheme(cfg.IsDarkTheme ? BaseTheme.Dark : BaseTheme.Light);
+            helper.SetTheme(theme);
+        }
+        catch { /* fall back to the default theme from App.xaml */ }
+    }
+
     protected override void OnExit(ExitEventArgs e)
     {
         NotificationService.Disable();

Proxmox Desktop/Controls/MachineCard.xaml

@@ -5,10 +5,12 @@
     xmlns:md="http://materialdesigninxaml.net/winfx/xaml/themes"
     xmlns:converters="clr-namespace:ProxmoxDesktop.Converters">
     <UserControl.Resources>
-        <converters:StatusToBrushConverter   x:Key="StatusToBrush"/>
-        <converters:BytesToReadableConverter x:Key="BytesToReadable"/>
-        <converters:CpuPercentConverter      x:Key="CpuPercent"/>
-        <BooleanToVisibilityConverter        x:Key="BoolToVisibility"/>
+        <converters:StatusToBrushConverter           x:Key="StatusToBrush"/>
+        <converters:BytesToReadableConverter         x:Key="BytesToReadable"/>
+        <converters:CpuPercentConverter              x:Key="CpuPercent"/>
+        <converters:InverseBoolToVisibilityConverter x:Key="InverseBoolToVisibility"/>
+        <converters:CollectionToVisibilityConverter  x:Key="CollectionToVisibility"/>
+        <BooleanToVisibilityConverter                x:Key="BoolToVisibility"/>
         <Style x:Key="ActionBtn" TargetType="Button" BasedOn="{StaticResource MaterialDesignIconForegroundButton}">
             <Setter Property="Width"   Value="32"/>
             <Setter Property="Height"  Value="32"/>
@@ -82,6 +84,29 @@
                                FontSize="10" FontWeight="Bold" Foreground="White"/>
                 </Border>
 
+                <!-- Tags (click to filter) -->
+                <ItemsControl ItemsSource="{Binding Machine.TagList, RelativeSource={RelativeSource AncestorType=UserControl}}"
+                              Visibility="{Binding Machine.TagList, RelativeSource={RelativeSource AncestorType=UserControl}, Converter={StaticResource CollectionToVisibility}}"
+                              HorizontalAlignment="Center" Margin="0,0,0,8">
+                    <ItemsControl.ItemsPanel>
+                        <ItemsPanelTemplate><WrapPanel HorizontalAlignment="Center"/></ItemsPanelTemplate>
+                    </ItemsControl.ItemsPanel>
+                    <ItemsControl.ItemTemplate>
+                        <DataTemplate>
+                            <Button Command="{Binding FilterTagCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"
+                                    CommandParameter="{Binding}"
+                                    Style="{StaticResource MaterialDesignFlatButton}"
+                                    Padding="6,0" Height="20" MinWidth="0" Margin="2,0"
+                                    md:ButtonAssist.CornerRadius="10" ToolTip="Filter by this tag">
+                                <StackPanel Orientation="Horizontal">
+                                    <md:PackIcon Kind="Tag" Width="10" Height="10" VerticalAlignment="Center" Margin="0,0,3,0"/>
+                                    <TextBlock Text="{Binding}" FontSize="10"/>
+                                </StackPanel>
+                            </Button>
+                        </DataTemplate>
+                    </ItemsControl.ItemTemplate>
+                </ItemsControl>
+
                 <!-- CPU bar -->
                 <Grid Margin="0,0,0,6">
                     <Grid.ColumnDefinitions>
@@ -131,7 +156,7 @@
                     </Button>
                     <Button Style="{StaticResource ActionBtn}" ToolTip="Start"
                             Command="{Binding StartCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"
-                            Visibility="{Binding Machine.IsRunning, RelativeSource={RelativeSource AncestorType=UserControl}, Converter={StaticResource BoolToVisibility}, ConverterParameter=inverse}">
+                            Visibility="{Binding Machine.IsRunning, RelativeSource={RelativeSource AncestorType=UserControl}, Converter={StaticResource InverseBoolToVisibility}}">
                         <md:PackIcon Kind="Play" Width="16" Height="16" Foreground="#4CAF50"/>
                     </Button>
                     <Button Style="{StaticResource ActionBtn}" ToolTip="Shutdown"

Proxmox Desktop/Controls/MachineCard.xaml.cs

@@ -17,6 +17,8 @@ public partial class MachineCard : UserControl
 
     public string MachineIcon => Machine?.IsLxc == true ? "/Assets/lxc.png" : "/Assets/vm.png";
 
+    public IRelayCommand<string> FilterTagCommand => new RelayCommand<string>(tag => { if (!string.IsNullOrEmpty(tag)) VM?.FilterByTagCommand.Execute(tag); });
+
     public IRelayCommand OpenNoVncCommand    => new RelayCommand(() => VM?.OpenConsoleCommand.Execute(new ConsoleArgs(Machine, "novnc")));
     public IRelayCommand OpenXtermCommand    => new RelayCommand(() => VM?.OpenConsoleCommand.Execute(new ConsoleArgs(Machine, "xtermjs")));
     public IRelayCommand OpenSpiceCommand    => new RelayCommand(() => VM?.OpenSpiceCommand.Execute(Machine));

Proxmox Desktop/Converters/Converters.cs

@@ -53,3 +53,34 @@ public object Convert(object? value, Type t, object? p, CultureInfo l)
         => value is true ? Visibility.Collapsed : Visibility.Visible;
     public object ConvertBack(object? v, Type t, object? p, CultureInfo l) => throw new NotImplementedException();
 }
+
+/// <summary>Visible when the bound collection has at least one item, otherwise Collapsed.</summary>
+public sealed class CollectionToVisibilityConverter : IValueConverter
+{
+    public object Convert(object? value, Type t, object? p, CultureInfo l)
+    {
+        if (value is System.Collections.IEnumerable e)
+        {
+            foreach (var _ in e) return Visibility.Visible;
+            return Visibility.Collapsed;
+        }
+        return value is null ? Visibility.Collapsed : Visibility.Visible;
+    }
+    public object ConvertBack(object? v, Type t, object? p, CultureInfo l) => throw new NotImplementedException();
+}
+
+/// <summary>
+/// Maps a bool to a <see cref="GridLength"/> — true → ConverterParameter px (default 320),
+/// false → 0. Used to collapse the activity panel column.
+/// </summary>
+public sealed class BoolToGridLengthConverter : IValueConverter
+{
+    public object Convert(object? value, Type t, object? p, CultureInfo l)
+    {
+        var width = 320.0;
+        if (p is string s && double.TryParse(s, NumberStyles.Any, CultureInfo.InvariantCulture, out var w))
+            width = w;
+        return value is true ? new GridLength(width) : new GridLength(0);
+    }
+    public object ConvertBack(object? v, Type t, object? p, CultureInfo l) => throw new NotImplementedException();
+}

Proxmox Desktop/ProxmoxDesktop.csproj

@@ -10,8 +10,8 @@
     <UseWPF>true</UseWPF>
     <RootNamespace>ProxmoxDesktop</RootNamespace>
     <AssemblyName>ProxmoxDesktop</AssemblyName>
-    <AssemblyVersion>2.1.0.0</AssemblyVersion>
-    <InformationalVersion>2.1.0</InformationalVersion>
+    <AssemblyVersion>2.2.0.0</AssemblyVersion>
+    <InformationalVersion>2.2.0</InformationalVersion>
     <Platforms>x64</Platforms>
     <RuntimeIdentifiers>win-x64</RuntimeIdentifiers>
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>

Proxmox Desktop/Services/ActivityLogService.cs

@@ -0,0 +1,64 @@
+using System.Collections.ObjectModel;
+using System.Windows;
+using System.Windows.Media;
+using MaterialDesignThemes.Wpf;
+
+namespace ProxmoxDesktop.Services;
+
+public enum ActivityLevel { Info, Success, Warning, Error }
+
+/// <summary>A single, immutable line in the activity log (UI-facing).</summary>
+public sealed record ActivityEntry(DateTime Time, PackIconKind Icon, Brush Color, string Title, string? Detail)
+{
+    public string TimeText => Time.ToString("HH:mm:ss");
+}
+
+/// <summary>
+/// In-memory, bounded activity log. New entries are inserted at the top and the
+/// collection is always mutated on the UI thread so it can be bound directly.
+/// </summary>
+public sealed class ActivityLogService
+{
+    private const int MaxEntries = 200;
+
+    public ObservableCollection<ActivityEntry> Entries { get; } = [];
+
+    public void Info(string title, string? detail = null)    => Add(ActivityLevel.Info,    title, detail);
+    public void Success(string title, string? detail = null) => Add(ActivityLevel.Success, title, detail);
+    public void Warning(string title, string? detail = null) => Add(ActivityLevel.Warning, title, detail);
+    public void Error(string title, string? detail = null)   => Add(ActivityLevel.Error,   title, detail);
+
+    public void Add(ActivityLevel level, string title, string? detail = null)
+    {
+        var (icon, color) = level switch
+        {
+            ActivityLevel.Success => (PackIconKind.CheckCircle,       Rgb(76, 175, 80)),
+            ActivityLevel.Warning => (PackIconKind.AlertCircle,       Rgb(255, 152, 0)),
+            ActivityLevel.Error   => (PackIconKind.CloseCircle,       Rgb(244, 67, 54)),
+            _                     => (PackIconKind.InformationOutline, Rgb(33, 150, 243)),
+        };
+
+        var entry = new ActivityEntry(DateTime.Now, icon, color, title, detail);
+        OnUi(() =>
+        {
+            Entries.Insert(0, entry);
+            while (Entries.Count > MaxEntries) Entries.RemoveAt(Entries.Count - 1);
+        });
+    }
+
+    public void Clear() => OnUi(Entries.Clear);
+
+    private static void OnUi(Action action)
+    {
+        var app = Application.Current;
+        if (app is not null && !app.Dispatcher.CheckAccess()) app.Dispatcher.Invoke(action);
+        else action();
+    }
+
+    private static SolidColorBrush Rgb(byte r, byte g, byte b)
+    {
+        var brush = new SolidColorBrush(Color.FromRgb(r, g, b));
+        brush.Freeze();
+        return brush;
+    }
+}