Avalonia: вкладки-документы + нижняя строка состояния + монохромные иконки

- Вкладки-документы: разделы открываются вкладками (несколько сразу),
  закрываются, активная синхронизирована с верхней навигацией
  (ShellViewModel.Tabs/ActiveTab, CloseTabCommand)
- Нижняя строка состояния: Пользователь | Аптека + кнопка «Настройки»
- Монохромные иконки Segoe MDL2 (те же глифы, что в WinForms):
  Прайс E14C, Заказы E7BF, Накладные E8A5, Отчёты EB05, Загрузить E896,
  Отправить E725, Отказы E7BA, Справочник E8F1
- контент показывает активную вкладку

Оболочка приведена к виду исходной программы. Проверено вживную.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/Elfisa.Avalonia/Styles/Elfisa.axaml

@@ -135,6 +135,30 @@
         <Setter Property="Background" Value="{DynamicResource SidebarActive}"/>
     </Style>
 
+    <!-- ============ Вкладки-документы ============ -->
+    <Style Selector="ListBox.tabs">
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="Padding" Value="0"/>
+    </Style>
+    <Style Selector="ListBox.tabs ListBoxItem">
+        <Setter Property="Padding" Value="12,6"/>
+        <Setter Property="Margin" Value="3,6"/>
+        <Setter Property="CornerRadius" Value="8"/>
+        <Setter Property="Foreground" Value="{DynamicResource Muted}"/>
+        <Setter Property="Cursor" Value="Hand"/>
+    </Style>
+    <Style Selector="ListBox.tabs ListBoxItem:pointerover /template/ ContentPresenter">
+        <Setter Property="Background" Value="{DynamicResource RowAlt}"/>
+    </Style>
+    <Style Selector="ListBox.tabs ListBoxItem:selected /template/ ContentPresenter">
+        <Setter Property="Background" Value="{DynamicResource AccentSoft}"/>
+    </Style>
+    <Style Selector="ListBox.tabs ListBoxItem:selected">
+        <Setter Property="Foreground" Value="{DynamicResource AccentPressed}"/>
+        <Setter Property="FontWeight" Value="SemiBold"/>
+    </Style>
+
     <!-- ============ Таблица ============ -->
     <Style Selector="DataGrid">
         <Setter Property="Background" Value="{DynamicResource Surface}"/>

src/Elfisa.Avalonia/ViewModels/ShellViewModel.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.ObjectModel;
 using System.Linq;
+using System.Threading.Tasks;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using Elfisa.Core;
@@ -10,7 +11,7 @@ namespace Elfisa.Avalonia.ViewModels;
 public class NavItem
 {
     public string Title { get; }
-    public string Icon { get; }
+    public string Icon { get; }   // глиф Segoe MDL2 Assets
     public Func<ViewModelBase> Factory { get; }
     public NavItem(string title, string icon, Func<ViewModelBase> factory)
     {
@@ -18,14 +19,29 @@ public class NavItem
     }
 }
 
+/// <summary>Открытая вкладка-документ.</summary>
+public sealed class DocumentTab
+{
+    public string Title { get; }
+    public string Key { get; }
+    public ViewModelBase Content { get; }
+    public DocumentTab(string title, string key, ViewModelBase content)
+    {
+        Title = title; Key = key; Content = content;
+    }
+}
+
 public partial class ShellViewModel : ViewModelBase
 {
     private readonly Action _logout;
+    private readonly ApiClient _api = new();
+    private bool _sync;
 
     public ObservableCollection<NavItem> NavItems { get; }
+    public ObservableCollection<DocumentTab> Tabs { get; } = new();
 
     [ObservableProperty] private NavItem? _selectedNav;
-    [ObservableProperty] private ViewModelBase? _currentPage;
+    [ObservableProperty] private DocumentTab? _activeTab;
 
     public string UserName => Session.Current.Username ?? "";
     public string RoleLabel => Session.Current.Role switch
@@ -37,25 +53,84 @@ public partial class ShellViewModel : ViewModelBase
         _ => Session.Current.Role ?? ""
     };
 
+    [ObservableProperty] private string _pharmacyAddress = "";
+
+    // Segoe MDL2 Assets — те же глифы, что в WinForms-версии
+    private const string IcoPrice = "";
+    private const string IcoOrders = "";
+    private const string IcoInvoices = "";
+    private const string IcoReports = "";
+    private const string IcoUpload = "";
+    private const string IcoSend = "";
+    private const string IcoRefusals = "";
+    private const string IcoDirectory = "";
+
     public ShellViewModel(Action logout)
     {
         _logout = logout;
+        _api.SetToken(Session.Current.Token);
+
         NavItems = new ObservableCollection<NavItem>
         {
-            new("Прайс-лист", "🧾", () => new PriceListViewModel()),
-            new("Заказы",     "🛒", () => new OrdersViewModel()),
-            new("Накладные",  "📄", () => new InvoicesViewModel()),
-            new("Отчёты",     "📊", () => new ReportsViewModel()),
-            new("Загрузить",  "📥", () => new LoadPriceViewModel()),
-            new("Отправить",  "📤", () => new SendOrderViewModel()),
-            new("Отказы",     "⛔", () => new PlaceholderPageViewModel("Отказы",
-                "Отказные позиции по заказам. Нужен серверный эндпоинт: данные (RefuseItemsCount) сейчас есть только в локальной БД WinForms-клиента.")),
-            new("Справочник", "📖", () => new DirectoryViewModel()),
+            new("Прайс-лист", IcoPrice, () => new PriceListViewModel()),
+            new("Заказы", IcoOrders, () => new OrdersViewModel()),
+            new("Накладные", IcoInvoices, () => new InvoicesViewModel()),
+            new("Отчёты", IcoReports, () => new ReportsViewModel()),
+            new("Загрузить", IcoUpload, () => new LoadPriceViewModel()),
+            new("Отправить", IcoSend, () => new SendOrderViewModel()),
+            new("Отказы", IcoRefusals, () => new PlaceholderPageViewModel("Отказы",
+                "Отказные позиции по заказам. Нужен серверный эндпоинт (RefuseItemsCount сейчас только в локальной БД WinForms).")),
+            new("Справочник", IcoDirectory, () => new DirectoryViewModel()),
         };
+
         SelectedNav = NavItems.First(n => n.Title == "Отчёты");
+        if (Session.Current.IsAuthenticated) _ = LoadPharmacyAsync();
     }
 
-    partial void OnSelectedNavChanged(NavItem? value) => CurrentPage = value?.Factory();
+    private async Task LoadPharmacyAsync()
+    {
+        try
+        {
+            var locs = await _api.GetBuyerLocationsAsync();
+            var def = locs.FirstOrDefault(l => l.IsDefault) ?? locs.FirstOrDefault();
+            PharmacyAddress = def?.Address ?? "";
+        }
+        catch { }
+    }
+
+    partial void OnSelectedNavChanged(NavItem? value)
+    {
+        if (_sync || value is null) return;
+        OpenOrActivate(value);
+    }
+
+    private void OpenOrActivate(NavItem nav)
+    {
+        var existing = Tabs.FirstOrDefault(t => t.Key == nav.Title);
+        if (existing is not null) { ActiveTab = existing; return; }
+        var tab = new DocumentTab(nav.Title, nav.Title, nav.Factory());
+        Tabs.Add(tab);
+        ActiveTab = tab;
+    }
+
+    partial void OnActiveTabChanged(DocumentTab? value)
+    {
+        if (value is null) return;
+        _sync = true;
+        SelectedNav = NavItems.FirstOrDefault(n => n.Title == value.Key);
+        _sync = false;
+    }
+
+    [RelayCommand]
+    private void CloseTab(DocumentTab? tab)
+    {
+        if (tab is null) return;
+        int idx = Tabs.IndexOf(tab);
+        bool wasActive = ReferenceEquals(ActiveTab, tab);
+        Tabs.Remove(tab);
+        if (wasActive)
+            ActiveTab = Tabs.Count == 0 ? null : Tabs[Math.Min(idx, Tabs.Count - 1)];
+    }
 
     [RelayCommand] private void Logout() => _logout();
 }

src/Elfisa.Avalonia/Views/ShellView.axaml

@@ -6,17 +6,15 @@
 
     <DockPanel>
 
-        <!-- Верхняя панель навигации (как в исходной программе) -->
+        <!-- Верхняя панель навигации -->
         <Border DockPanel.Dock="Top" Background="{DynamicResource Sidebar}" Height="82">
             <Grid ColumnDefinitions="Auto,*,Auto" Margin="18,0">
 
-                <!-- Логотип -->
                 <StackPanel Grid.Column="0" VerticalAlignment="Center" Margin="0,0,14,0">
                     <TextBlock Text="ЭльФиСА" FontSize="18" FontWeight="Bold" Foreground="White"/>
                     <TextBlock Text="Электронная Фармация" Foreground="{DynamicResource SidebarText}" FontSize="10"/>
                 </StackPanel>
 
-                <!-- Навигация -->
                 <ListBox Grid.Column="1" Classes="topnav" VerticalAlignment="Center" HorizontalAlignment="Left"
                          ItemsSource="{Binding NavItems}" SelectedItem="{Binding SelectedNav}">
                     <ListBox.ItemsPanel>
@@ -26,17 +24,16 @@
                     </ListBox.ItemsPanel>
                     <ListBox.ItemTemplate>
                         <DataTemplate x:DataType="vm:NavItem">
-                            <StackPanel Orientation="Vertical" Width="66" Spacing="2">
-                                <TextBlock Text="{Binding Icon}" FontSize="16" HorizontalAlignment="Center"/>
+                            <StackPanel Orientation="Vertical" Width="66" Spacing="3">
+                                <TextBlock Text="{Binding Icon}" FontFamily="Segoe MDL2 Assets" FontSize="18"
+                                           Foreground="White" HorizontalAlignment="Center"/>
                                 <TextBlock Text="{Binding Title}" Foreground="{DynamicResource SidebarText}"
-                                           FontSize="11" HorizontalAlignment="Center"
-                                           TextTrimming="CharacterEllipsis"/>
+                                           FontSize="11" HorizontalAlignment="Center" TextTrimming="CharacterEllipsis"/>
                             </StackPanel>
                         </DataTemplate>
                     </ListBox.ItemTemplate>
                 </ListBox>
 
-                <!-- Пользователь + выход -->
                 <StackPanel Grid.Column="2" Orientation="Horizontal" Spacing="12" VerticalAlignment="Center" Margin="8,0,0,0">
                     <StackPanel VerticalAlignment="Center">
                         <TextBlock Text="{Binding UserName}" Foreground="White" FontSize="12" FontWeight="SemiBold"
@@ -44,10 +41,6 @@
                         <TextBlock Text="{Binding RoleLabel}" Foreground="{DynamicResource SidebarText}"
                                    FontSize="10.5" HorizontalAlignment="Right"/>
                     </StackPanel>
-                    <Button Content="⚙" Click="OnSettingsClick" ToolTip.Tip="Настройки"
-                            Background="Transparent" Foreground="White" BorderBrush="#55FFFFFF"
-                            BorderThickness="1" CornerRadius="8" Width="40" Height="38" Padding="0"
-                            FontSize="16" Cursor="Hand"/>
                     <Button Content="Выйти" Command="{Binding LogoutCommand}"
                             Background="Transparent" Foreground="White" BorderBrush="#55FFFFFF"
                             BorderThickness="1" CornerRadius="8" Padding="16,9" Cursor="Hand"/>
@@ -55,7 +48,48 @@
             </Grid>
         </Border>
 
-        <!-- Контент -->
-        <ContentControl Content="{Binding CurrentPage}"/>
+        <!-- Строка вкладок-документов -->
+        <Border DockPanel.Dock="Top" Background="{DynamicResource Surface}"
+                BorderBrush="{DynamicResource Border}" BorderThickness="0,0,0,1" MinHeight="44" Padding="10,0">
+            <ListBox Classes="tabs" VerticalAlignment="Center" x:CompileBindings="False"
+                     ItemsSource="{Binding Tabs}" SelectedItem="{Binding ActiveTab}">
+                <ListBox.ItemsPanel>
+                    <ItemsPanelTemplate>
+                        <StackPanel Orientation="Horizontal"/>
+                    </ItemsPanelTemplate>
+                </ListBox.ItemsPanel>
+                <ListBox.ItemTemplate>
+                    <DataTemplate x:DataType="vm:DocumentTab">
+                        <StackPanel Orientation="Horizontal" Spacing="8" VerticalAlignment="Center">
+                            <TextBlock Text="{Binding Title}" VerticalAlignment="Center" FontSize="13"/>
+                            <Button Content="✕" FontSize="11" Width="20" Height="20" Padding="0"
+                                    Background="Transparent" BorderThickness="0" Cursor="Hand"
+                                    Foreground="{DynamicResource Muted}"
+                                    Command="{Binding $parent[ListBox].DataContext.CloseTabCommand}"
+                                    CommandParameter="{Binding}"/>
+                        </StackPanel>
+                    </DataTemplate>
+                </ListBox.ItemTemplate>
+            </ListBox>
+        </Border>
+
+        <!-- Нижняя строка состояния -->
+        <Border DockPanel.Dock="Bottom" Background="{DynamicResource Surface}"
+                BorderBrush="{DynamicResource Border}" BorderThickness="0,1,0,0" Height="32" Padding="16,0">
+            <Grid ColumnDefinitions="*,Auto">
+                <StackPanel Grid.Column="0" Orientation="Horizontal" Spacing="6" VerticalAlignment="Center">
+                    <TextBlock Text="Пользователь:" Classes="muted" FontSize="12"/>
+                    <TextBlock Text="{Binding UserName}" FontSize="12" Foreground="{DynamicResource Text}"/>
+                    <TextBlock Text="   |   Аптека:" Classes="muted" FontSize="12"/>
+                    <TextBlock Text="{Binding PharmacyAddress}" FontSize="12" Foreground="{DynamicResource Text}" TextTrimming="CharacterEllipsis"/>
+                </StackPanel>
+                <Button Grid.Column="1" Content="Настройки" Click="OnSettingsClick"
+                        Background="Transparent" Foreground="{DynamicResource Accent}" BorderThickness="0"
+                        Padding="10,4" FontSize="12.5" Cursor="Hand"/>
+            </Grid>
+        </Border>
+
+        <!-- Контент активной вкладки -->
+        <ContentControl Content="{Binding ActiveTab.Content}"/>
     </DockPanel>
 </UserControl>