Avalonia: верхняя навигация (как в WinForms) + раздел «Заказы»

- Навигация перенесена из левого сайдбара в ВЕРХНЮЮ горизонтальную
  панель, как в исходной программе: логотип слева, вкладки
  (иконка+подпись) по центру, пользователь+Выйти справа
- Раздел «Заказы»: мастер-детали (список слева, состав заказа справа
  с позициями и итогом), на данных /api/buyer/report
- Числовые колонки выровнены вправо (стиль DataGridCell.num)
- Отчёты: тулбар на WrapPanel, стабильные ширины колонок

Проверено запуском (скриншоты): верхняя навигация, отчёты, заказы.

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

src/Elfisa.Avalonia/Styles/Elfisa.axaml

@@ -116,6 +116,25 @@
         <Setter Property="FontWeight" Value="SemiBold"/>
     </Style>
 
+    <!-- ============ Верхняя навигация (как в WinForms-версии) ============ -->
+    <Style Selector="ListBox.topnav">
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="Padding" Value="0"/>
+    </Style>
+    <Style Selector="ListBox.topnav ListBoxItem">
+        <Setter Property="Padding" Value="10,7"/>
+        <Setter Property="Margin" Value="3,0"/>
+        <Setter Property="CornerRadius" Value="10"/>
+        <Setter Property="Cursor" Value="Hand"/>
+    </Style>
+    <Style Selector="ListBox.topnav ListBoxItem:pointerover /template/ ContentPresenter">
+        <Setter Property="Background" Value="{DynamicResource SidebarActive}"/>
+    </Style>
+    <Style Selector="ListBox.topnav ListBoxItem:selected /template/ ContentPresenter">
+        <Setter Property="Background" Value="{DynamicResource SidebarActive}"/>
+    </Style>
+
     <!-- ============ Таблица ============ -->
     <Style Selector="DataGrid">
         <Setter Property="Background" Value="{DynamicResource Surface}"/>
@@ -139,6 +158,10 @@
     <Style Selector="DataGridCell">
         <Setter Property="Padding" Value="10,0"/>
     </Style>
+    <!-- числовые ячейки — вправо -->
+    <Style Selector="DataGridCell.num TextBlock">
+        <Setter Property="TextAlignment" Value="Right"/>
+    </Style>
     <Style Selector="DataGridRow:selected /template/ Rectangle#BackgroundRectangle">
         <Setter Property="Fill" Value="{DynamicResource AccentSoft}"/>
         <Setter Property="Opacity" Value="1"/>

src/Elfisa.Avalonia/ViewModels/OrdersViewModel.cs

@@ -0,0 +1,99 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Elfisa.Core;
+
+namespace Elfisa.Avalonia.ViewModels;
+
+public sealed class OrderItemRow
+{
+    public string Name { get; init; } = "";
+    public string Code { get; init; } = "";
+    public decimal Qty { get; init; }
+    public decimal Price { get; init; }
+    public decimal Sum { get; init; }
+}
+
+public sealed class OrderSummary
+{
+    public string Date { get; init; } = "";
+    public string Number { get; init; } = "";
+    public string Supplier { get; init; } = "";
+    public string Location { get; init; } = "";
+    public string Status { get; init; } = "";
+    public int ItemsCount { get; init; }
+    public decimal Sum { get; init; }
+    public ObservableCollection<OrderItemRow> Items { get; init; } = new();
+}
+
+/// <summary>
+/// Заказы: список + состав. Пока строится из /api/buyer/report (он работает);
+/// после деплоя фикса /api/buyer/orders можно перейти на «родной» эндпоинт
+/// (даст ещё PlacedAt, Comment, отмену/размещение).
+/// </summary>
+public partial class OrdersViewModel : ViewModelBase
+{
+    private readonly ApiClient _api = new();
+
+    public ObservableCollection<OrderSummary> Orders { get; } = new();
+
+    [ObservableProperty] private OrderSummary? _selectedOrder;
+    [ObservableProperty] private bool _busy;
+    [ObservableProperty] private string? _status;
+
+    public OrdersViewModel()
+    {
+        _api.SetToken(Session.Current.Token);
+        if (Session.Current.IsAuthenticated) _ = LoadAsync();
+    }
+
+    [RelayCommand]
+    private async Task LoadAsync()
+    {
+        Status = null;
+        try
+        {
+            Busy = true;
+            var to = DateTime.Today;
+            var from = to.AddMonths(-24);
+            var lines = await _api.GetBuyerReportAsync(from, to);
+
+            Orders.Clear();
+            foreach (var g in lines.GroupBy(l => l.OrderId)
+                         .OrderByDescending(x => x.First().OrderDate ?? DateTime.MinValue))
+            {
+                var f = g.First();
+                var items = new ObservableCollection<OrderItemRow>(
+                    g.Select(l => new OrderItemRow
+                    {
+                        Name = l.ItemName ?? "",
+                        Code = l.ItemCode ?? "",
+                        Qty = l.Qty,
+                        Price = l.UnitPrice,
+                        Sum = l.Sum
+                    }));
+
+                Orders.Add(new OrderSummary
+                {
+                    Date = f.OrderDate?.ToLocalTime().ToString("dd.MM.yyyy") ?? "",
+                    Number = f.GlobalSign ?? "",
+                    Supplier = string.Join(", ", g.Select(x => x.Supplier)
+                        .Where(s => !string.IsNullOrWhiteSpace(s)).Distinct()),
+                    Location = f.Location ?? "",
+                    Status = f.Status ?? "",
+                    ItemsCount = g.Count(),
+                    Sum = g.Sum(x => x.Sum),
+                    Items = items
+                });
+            }
+
+            SelectedOrder = Orders.FirstOrDefault();
+            if (Orders.Count == 0) Status = "Заказов за последние 2 года нет.";
+        }
+        catch (Exception ex) { Status = ex.Message; }
+        finally { Busy = false; }
+    }
+}

src/Elfisa.Avalonia/ViewModels/ShellViewModel.cs

@@ -42,13 +42,13 @@ public partial class ShellViewModel : ViewModelBase
         _logout = logout;
         NavItems = new ObservableCollection<NavItem>
         {
-            new("Прайс-лист", "P", () => new PlaceholderPageViewModel("Прайс-лист", "Каталог, поиск и добавление позиций в заказ.")),
-            new("Заказы",     "З", () => new PlaceholderPageViewModel("Заказы", "История заказов и их статусы.")),
-            new("Накладные",  "Н", () => new PlaceholderPageViewModel("Накладные", "Приход товара по заказам.")),
-            new("Отчёты",     "О", () => new ReportsViewModel()),
-            new("Отправить",  "→", () => new PlaceholderPageViewModel("Отправить", "Формирование и выгрузка заявок поставщику (DBF).")),
-            new("Отказы",     "!", () => new PlaceholderPageViewModel("Отказы", "Отказные позиции по заказам.")),
-            new("Справочник", "С", () => new PlaceholderPageViewModel("Справочник", "Контрагенты, грузополучатели, настройки.")),
+            new("Прайс-лист", "🧾", () => new PlaceholderPageViewModel("Прайс-лист", "Каталог, поиск и добавление позиций в заказ.")),
+            new("Заказы",     "🛒", () => new OrdersViewModel()),
+            new("Накладные",  "📄", () => new PlaceholderPageViewModel("Накладные", "Приход товара по заказам.")),
+            new("Отчёты",     "📊", () => new ReportsViewModel()),
+            new("Отправить",  "📤", () => new PlaceholderPageViewModel("Отправить", "Формирование и выгрузка заявок поставщику (DBF).")),
+            new("Отказы",     "⛔", () => new PlaceholderPageViewModel("Отказы", "Отказные позиции по заказам.")),
+            new("Справочник", "📖", () => new PlaceholderPageViewModel("Справочник", "Контрагенты, грузополучатели, настройки.")),
         };
         SelectedNav = NavItems.First(n => n.Title == "Отчёты");
     }

src/Elfisa.Avalonia/Views/OrdersView.axaml

@@ -0,0 +1,75 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:Elfisa.Avalonia.ViewModels"
+             xmlns:conv="using:Avalonia.Data.Converters"
+             x:Class="Elfisa.Avalonia.Views.OrdersView"
+             x:DataType="vm:OrdersViewModel">
+
+    <Grid Margin="24" RowDefinitions="Auto,*">
+        <StackPanel Grid.Row="0" Spacing="2" Margin="0,0,0,14">
+            <TextBlock Text="Заказы" Classes="h1"/>
+            <TextBlock Text="История заказов и их состав" Classes="muted"/>
+        </StackPanel>
+
+        <Grid Grid.Row="1" ColumnDefinitions="*,16,430">
+
+            <!-- Список заказов -->
+            <Border Grid.Column="0" Classes="card" Padding="0" ClipToBounds="True">
+                <DataGrid ItemsSource="{Binding Orders}" SelectedItem="{Binding SelectedOrder}"
+                          x:CompileBindings="False"
+                          AutoGenerateColumns="False" IsReadOnly="True" HeadersVisibility="Column"
+                          CanUserResizeColumns="True" CanUserSortColumns="False">
+                    <DataGrid.Columns>
+                        <DataGridTextColumn Header="Дата" Width="112" Binding="{Binding Date}"/>
+                        <DataGridTextColumn Header="Номер" Width="140" Binding="{Binding Number}"/>
+                        <DataGridTextColumn Header="Поставщик" Width="*" Binding="{Binding Supplier}"/>
+                        <DataGridTextColumn Header="Позиций" Width="90" Binding="{Binding ItemsCount}" CellStyleClasses="num"/>
+                        <DataGridTextColumn Header="Сумма" Width="132" Binding="{Binding Sum, StringFormat='{}{0:N2}'}" CellStyleClasses="num"/>
+                        <DataGridTextColumn Header="Статус" Width="95" Binding="{Binding Status}"/>
+                    </DataGrid.Columns>
+                </DataGrid>
+            </Border>
+
+            <!-- Карточка заказа -->
+            <Border Grid.Column="2" Classes="card" Padding="18">
+                <DockPanel>
+                    <StackPanel DockPanel.Dock="Top" Spacing="4" Margin="0,0,0,14">
+                        <TextBlock Text="{Binding SelectedOrder.Number}" Classes="h2"/>
+                        <StackPanel Orientation="Horizontal" Spacing="10">
+                            <TextBlock Text="{Binding SelectedOrder.Date}" Classes="muted"/>
+                            <TextBlock Text="{Binding SelectedOrder.Status}" Classes="muted"/>
+                        </StackPanel>
+                        <TextBlock Text="{Binding SelectedOrder.Supplier}" Classes="muted" TextWrapping="Wrap"/>
+                        <TextBlock Text="{Binding SelectedOrder.Location}" Classes="muted" TextWrapping="Wrap"/>
+                    </StackPanel>
+
+                    <Border DockPanel.Dock="Bottom" Margin="0,12,0,0" Padding="0,10,0,0"
+                            BorderThickness="0,1,0,0" BorderBrush="{DynamicResource Border}">
+                        <Grid ColumnDefinitions="*,Auto">
+                            <TextBlock Grid.Column="0" Text="Итого" FontWeight="SemiBold" Foreground="{DynamicResource Text}"/>
+                            <TextBlock Grid.Column="1" Text="{Binding SelectedOrder.Sum, StringFormat='{}{0:N2}'}"
+                                       FontWeight="SemiBold" Foreground="{DynamicResource Accent}"/>
+                        </Grid>
+                    </Border>
+
+                    <DataGrid ItemsSource="{Binding SelectedOrder.Items}" x:CompileBindings="False"
+                              AutoGenerateColumns="False" IsReadOnly="True" HeadersVisibility="Column"
+                              CanUserResizeColumns="True" CanUserSortColumns="False">
+                        <DataGrid.Columns>
+                            <DataGridTextColumn Header="Товар" Width="*" Binding="{Binding Name}"/>
+                            <DataGridTextColumn Header="Кол-во" Width="78" Binding="{Binding Qty, StringFormat='{}{0:N0}'}" CellStyleClasses="num"/>
+                            <DataGridTextColumn Header="Сумма" Width="110" Binding="{Binding Sum, StringFormat='{}{0:N2}'}" CellStyleClasses="num"/>
+                        </DataGrid.Columns>
+                    </DataGrid>
+                </DockPanel>
+            </Border>
+        </Grid>
+
+        <!-- Статус -->
+        <Border Grid.Row="1" VerticalAlignment="Bottom" HorizontalAlignment="Left" Margin="4"
+                Padding="10,7" CornerRadius="6" Background="{DynamicResource AccentSoft}"
+                IsVisible="{Binding Status, Converter={x:Static conv:ObjectConverters.IsNotNull}}">
+            <TextBlock Text="{Binding Status}" Foreground="{DynamicResource AccentPressed}" FontSize="12.5"/>
+        </Border>
+    </Grid>
+</UserControl>

src/Elfisa.Avalonia/Views/OrdersView.axaml.cs

@@ -0,0 +1,9 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace Elfisa.Avalonia.Views;
+
+public partial class OrdersView : UserControl
+{
+    public OrdersView() => AvaloniaXamlLoader.Load(this);
+}

src/Elfisa.Avalonia/Views/ShellView.axaml

@@ -4,47 +4,54 @@
              x:Class="Elfisa.Avalonia.Views.ShellView"
              x:DataType="vm:ShellViewModel">
 
-    <Grid ColumnDefinitions="250,*">
+    <DockPanel>
 
-        <!-- Сайдбар -->
-        <Border Grid.Column="0" Background="{DynamicResource Sidebar}">
-            <DockPanel>
-                <StackPanel DockPanel.Dock="Top" Margin="22,24,20,18" Spacing="2">
-                    <TextBlock Text="ЭльФиСА" FontSize="21" FontWeight="Bold" Foreground="White"/>
-                    <TextBlock Text="Электронная Фармация" Foreground="{DynamicResource SidebarText}" FontSize="11"/>
+        <!-- Верхняя панель навигации (как в исходной программе) -->
+        <Border DockPanel.Dock="Top" Background="{DynamicResource Sidebar}" Height="82">
+            <Grid ColumnDefinitions="Auto,*,Auto" Margin="18,0">
+
+                <!-- Логотип -->
+                <StackPanel Grid.Column="0" VerticalAlignment="Center" Margin="0,0,22,0">
+                    <TextBlock Text="ЭльФиСА" FontSize="19" FontWeight="Bold" Foreground="White"/>
+                    <TextBlock Text="Электронная Фармация" Foreground="{DynamicResource SidebarText}" FontSize="10.5"/>
                 </StackPanel>
 
-                <Border DockPanel.Dock="Bottom" Margin="14,10,14,16" Padding="14" CornerRadius="12"
-                        Background="{DynamicResource SidebarActive}">
-                    <StackPanel Spacing="9">
-                        <TextBlock Text="{Binding UserName}" Foreground="White" FontWeight="SemiBold"
-                                   FontSize="12.5" TextTrimming="CharacterEllipsis"/>
-                        <TextBlock Text="{Binding RoleLabel}" Foreground="{DynamicResource SidebarText}" FontSize="11"/>
-                        <Button Content="Выйти" Command="{Binding LogoutCommand}" HorizontalAlignment="Stretch"
-                                Background="Transparent" Foreground="White" BorderBrush="#55FFFFFF"
-                                BorderThickness="1" CornerRadius="8" Padding="0,7" Cursor="Hand"/>
-                    </StackPanel>
-                </Border>
-
-                <ListBox Classes="nav" Margin="0,6,0,0"
+                <!-- Навигация -->
+                <ListBox Grid.Column="1" Classes="topnav" VerticalAlignment="Center" HorizontalAlignment="Left"
                          ItemsSource="{Binding NavItems}" SelectedItem="{Binding SelectedNav}">
+                    <ListBox.ItemsPanel>
+                        <ItemsPanelTemplate>
+                            <StackPanel Orientation="Horizontal"/>
+                        </ItemsPanelTemplate>
+                    </ListBox.ItemsPanel>
                     <ListBox.ItemTemplate>
                         <DataTemplate x:DataType="vm:NavItem">
-                            <StackPanel Orientation="Horizontal" Spacing="12">
-                                <Border Width="26" Height="26" CornerRadius="7" Background="#26FFFFFF">
-                                    <TextBlock Text="{Binding Icon}" Foreground="White" FontSize="12.5"
-                                               FontWeight="SemiBold"
-                                               HorizontalAlignment="Center" VerticalAlignment="Center"/>
-                                </Border>
-                                <TextBlock Text="{Binding Title}" VerticalAlignment="Center"/>
+                            <StackPanel Orientation="Vertical" Width="76" Spacing="3">
+                                <TextBlock Text="{Binding Icon}" FontSize="17" HorizontalAlignment="Center"/>
+                                <TextBlock Text="{Binding Title}" Foreground="{DynamicResource SidebarText}"
+                                           FontSize="11.5" HorizontalAlignment="Center"
+                                           TextTrimming="CharacterEllipsis"/>
                             </StackPanel>
                         </DataTemplate>
                     </ListBox.ItemTemplate>
                 </ListBox>
-            </DockPanel>
+
+                <!-- Пользователь + выход -->
+                <StackPanel Grid.Column="2" Orientation="Horizontal" Spacing="14" VerticalAlignment="Center" Margin="18,0,0,0">
+                    <StackPanel VerticalAlignment="Center">
+                        <TextBlock Text="{Binding UserName}" Foreground="White" FontSize="12" FontWeight="SemiBold"
+                                   HorizontalAlignment="Right" TextTrimming="CharacterEllipsis"/>
+                        <TextBlock Text="{Binding RoleLabel}" Foreground="{DynamicResource SidebarText}"
+                                   FontSize="10.5" HorizontalAlignment="Right"/>
+                    </StackPanel>
+                    <Button Content="Выйти" Command="{Binding LogoutCommand}"
+                            Background="Transparent" Foreground="White" BorderBrush="#55FFFFFF"
+                            BorderThickness="1" CornerRadius="8" Padding="16,9" Cursor="Hand"/>
+                </StackPanel>
+            </Grid>
         </Border>
 
         <!-- Контент -->
-        <ContentControl Grid.Column="1" Content="{Binding CurrentPage}"/>
-    </Grid>
+        <ContentControl Content="{Binding CurrentPage}"/>
+    </DockPanel>
 </UserControl>