2026-08-11 09:41:09 +03:00
31 changed files with 1329 additions and 0 deletions
--- a/Elfisa.Cross.slnx
+++ b/Elfisa.Cross.slnx
@ -0,0 +1,6 @@
+<Solution>
+  <Folder Name="/src/">
+    <Project Path="src/Elfisa.Avalonia/Elfisa.Avalonia.csproj" />
+    <Project Path="src/Elfisa.Core/Elfisa.Core.csproj" />
+  </Folder>
+</Solution>
--- a/src/Elfisa.Avalonia/App.axaml
+++ b/src/Elfisa.Avalonia/App.axaml
@ -0,0 +1,52 @@
+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="Elfisa.Avalonia.App"
+             xmlns:local="using:Elfisa.Avalonia"
+             RequestedThemeVariant="Light">
+
+    <Application.DataTemplates>
+        <local:ViewLocator/>
+    </Application.DataTemplates>
+
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.ThemeDictionaries>
+                <ResourceDictionary x:Key="Light">
+                    <SolidColorBrush x:Key="Bg" Color="#EDF2F2"/>
+                    <SolidColorBrush x:Key="Surface" Color="#FFFFFF"/>
+                    <SolidColorBrush x:Key="Text" Color="#1F2933"/>
+                    <SolidColorBrush x:Key="Muted" Color="#6B7785"/>
+                    <SolidColorBrush x:Key="Border" Color="#E1E7E8"/>
+                    <SolidColorBrush x:Key="RowAlt" Color="#F5F9F9"/>
+                    <SolidColorBrush x:Key="InputBg" Color="#FFFFFF"/>
+                </ResourceDictionary>
+                <ResourceDictionary x:Key="Dark">
+                    <SolidColorBrush x:Key="Bg" Color="#0E1416"/>
+                    <SolidColorBrush x:Key="Surface" Color="#182226"/>
+                    <SolidColorBrush x:Key="Text" Color="#E7EDEE"/>
+                    <SolidColorBrush x:Key="Muted" Color="#8FA0A5"/>
+                    <SolidColorBrush x:Key="Border" Color="#28353A"/>
+                    <SolidColorBrush x:Key="RowAlt" Color="#141D20"/>
+                    <SolidColorBrush x:Key="InputBg" Color="#0F1719"/>
+                </ResourceDictionary>
+            </ResourceDictionary.ThemeDictionaries>
+
+            <!-- Акцент бренда (#0F766E — бирюза шапки), постоянен в обеих темах -->
+            <Color x:Key="AccentColor">#0F766E</Color>
+            <SolidColorBrush x:Key="Accent" Color="#0F766E"/>
+            <SolidColorBrush x:Key="AccentHover" Color="#0D9488"/>
+            <SolidColorBrush x:Key="AccentPressed" Color="#115E59"/>
+            <SolidColorBrush x:Key="AccentSoft" Color="#CCFBF1"/>
+            <SolidColorBrush x:Key="Sidebar" Color="#0E5F58"/>
+            <SolidColorBrush x:Key="SidebarActive" Color="#0A4A44"/>
+            <SolidColorBrush x:Key="SidebarText" Color="#D5F5F0"/>
+            <SolidColorBrush x:Key="OnAccent" Color="#FFFFFF"/>
+        </ResourceDictionary>
+    </Application.Resources>
+
+    <Application.Styles>
+        <FluentTheme />
+        <StyleInclude Source="avares://Avalonia.Controls.DataGrid/Themes/Fluent.xaml"/>
+        <StyleInclude Source="/Styles/Elfisa.axaml"/>
+    </Application.Styles>
+</Application>
--- a/src/Elfisa.Avalonia/App.axaml.cs
+++ b/src/Elfisa.Avalonia/App.axaml.cs
@ -0,0 +1,31 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Data.Core;
+using Avalonia.Data.Core.Plugins;
+using System.Linq;
+using Avalonia.Markup.Xaml;
+using Elfisa.Avalonia.ViewModels;
+using Elfisa.Avalonia.Views;
+
+namespace Elfisa.Avalonia;
+
+public partial class App : Application
+{
+    public override void Initialize()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+
+    public override void OnFrameworkInitializationCompleted()
+    {
+        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            desktop.MainWindow = new MainWindow
+            {
+                DataContext = new RootViewModel(),
+            };
+        }
+
+        base.OnFrameworkInitializationCompleted();
+    }
+}
--- a/src/Elfisa.Avalonia/Assets/avalonia-logo.ico
+++ b/src/Elfisa.Avalonia/Assets/avalonia-logo.ico
--- a/src/Elfisa.Avalonia/Elfisa.Avalonia.csproj
+++ b/src/Elfisa.Avalonia/Elfisa.Avalonia.csproj
@ -0,0 +1,31 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+    <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Folder Include="Models\" />
+    <AvaloniaResource Include="Assets\**" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia" Version="12.1.0" />
+    <PackageReference Include="Avalonia.Controls.DataGrid" Version="12.1.0" />
+    <PackageReference Include="Avalonia.Desktop" Version="12.1.0" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="12.1.0" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="12.1.0" />
+    <PackageReference Include="AvaloniaUI.DiagnosticsSupport" Version="2.2.1">
+      <IncludeAssets Condition="'$(Configuration)' != 'Debug'">None</IncludeAssets>
+      <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Elfisa.Core\Elfisa.Core.csproj" />
+  </ItemGroup>
+</Project>
--- a/src/Elfisa.Avalonia/Program.cs
+++ b/src/Elfisa.Avalonia/Program.cs
@ -0,0 +1,24 @@
+using Avalonia;
+using System;
+
+namespace Elfisa.Avalonia;
+
+sealed class Program
+{
+    // Initialization code. Don't use any Avalonia, third-party APIs or any
+    // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
+    // yet and stuff might break.
+    [STAThread]
+    public static void Main(string[] args) => BuildAvaloniaApp()
+        .StartWithClassicDesktopLifetime(args);
+
+    // Avalonia configuration, don't remove; also used by visual designer.
+    public static AppBuilder BuildAvaloniaApp()
+        => AppBuilder.Configure<App>()
+            .UsePlatformDetect()
+#if DEBUG
+            .WithDeveloperTools()
+#endif
+            .WithInterFont()
+            .LogToTrace();
+}
--- a/src/Elfisa.Avalonia/README.md
+++ b/src/Elfisa.Avalonia/README.md
@ -0,0 +1,65 @@
+# ЭльФиСА — кросс-платформенный клиент (Avalonia)
+
+Порт десктопного клиента с WinForms на **Avalonia UI** (.NET 8) —
+работает на **Windows, macOS и Linux** из одного кода. Начат как замена
+WinForms-версии (которая только под Windows).
+
+## Что уже готово (фундамент + эталонный экран)
+- **Elfisa.Core** — переносимая бизнес-логика (без UI): `ApiClient`
+  (логин, отчёт покупателя, ИИ-отчёт), DTO, `AppConfig`, `Session`.
+- **Дизайн-система** в фирменной бирюзе (#0F766E): светлая/тёмная тема,
+  стили кнопок, полей, карточек, таблицы, сайдбара (`Styles/Elfisa.axaml`).
+- **Экран входа** (`LoginView`) — реальная авторизация через `/auth/login`.
+- **Шелл** (`ShellView`) — сайдбар-навигация + карточка пользователя + выход.
+- **Отчёты** (`ReportsView`) — ПОЛНОСТЬЮ рабочий эталонный раздел:
+  период, 4 типа отчёта (агрегация как в WinForms), авто-загрузка,
+  свободный **ИИ-запрос → Word/Excel** (через `/ai`), таблица с динамическими
+  колонками. Данные скоупятся по JWT — только заказы этого покупателя.
+- Заглушки остальных разделов (Прайс-лист, Заказы, Накладные, Отправить,
+  Отказы, Справочник).
+
+## Архитектура
+MVVM (CommunityToolkit.Mvvm) + ViewLocator (VM → View по имени).
+```
+Program → App → MainWindow(RootViewModel)
+  RootViewModel: LoginViewModel  ⇄  ShellViewModel
+  ShellViewModel.CurrentPage: ReportsViewModel | PlaceholderPageViewModel | …
+```
+Вся сетевая логика — в `Elfisa.Core` (переиспользуется и десктопом, и
+будущим мобильным/веб-клиентом Avalonia).
+
+## Запуск
+```bash
+dotnet run --project src/Elfisa.Avalonia
+```
+Dev-автологин (удобно при разработке — минуя экран входа):
+```bash
+# Windows PowerShell
+$env:ELF_DEV_USER="user@example.com"; $env:ELF_DEV_PASS="***"; dotnet run --project src/Elfisa.Avalonia
+```
+Переопределение адресов (по умолчанию https://24pharmdata.ru и .../ai):
+`ELF_API_BASE_URL`, `ELF_AI_BASE_URL`.
+
+Сборка под конкретную ОС:
+```bash
+dotnet publish src/Elfisa.Avalonia -c Release -r osx-arm64 --self-contained   # Mac (M-серия)
+dotnet publish src/Elfisa.Avalonia -c Release -r win-x64  --self-contained    # Windows
+```
+
+## Дорожная карта портирования
+Логика этих экранов частично уже есть в WinForms `ApiClient` — переносится
+в `Elfisa.Core` метод за методом, UI пишется по образцу `ReportsView`.
+
+| Раздел | Что нужно | Сложность |
+|---|---|---|
+| Прайс-лист | поиск/каталог, наценки, добавление в заказ, большой грид | высокая |
+| Заказы | список + карточка заказа + позиции | средняя |
+| Накладные | список приходов | средняя |
+| Отправить | сборка заявки + выгрузка DBF (портировать `orderexport`) | средняя |
+| Отказы | список отказных позиций | низкая |
+| Справочник | контрагенты, грузополучатели, настройки | средняя |
+| Автообновление | аналог AutoUpdater под каждую ОС | средняя |
+
+**Порядок рекомендую:** Заказы → Прайс-лист → Отправить → остальное.
+Бизнес-логика каждого — обычный C#, переносится как есть; переписывается
+только UI (WinForms → Avalonia XAML), что и есть основная работа.
--- a/src/Elfisa.Avalonia/Styles/Elfisa.axaml
+++ b/src/Elfisa.Avalonia/Styles/Elfisa.axaml
@ -0,0 +1,146 @@
+<Styles xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+
+    <!-- ============ Типографика ============ -->
+    <Style Selector="TextBlock.h1">
+        <Setter Property="FontSize" Value="22"/>
+        <Setter Property="FontWeight" Value="SemiBold"/>
+        <Setter Property="Foreground" Value="{DynamicResource Text}"/>
+    </Style>
+    <Style Selector="TextBlock.h2">
+        <Setter Property="FontSize" Value="16"/>
+        <Setter Property="FontWeight" Value="SemiBold"/>
+        <Setter Property="Foreground" Value="{DynamicResource Text}"/>
+    </Style>
+    <Style Selector="TextBlock.muted">
+        <Setter Property="Foreground" Value="{DynamicResource Muted}"/>
+        <Setter Property="FontSize" Value="12.5"/>
+    </Style>
+    <Style Selector="TextBlock.label">
+        <Setter Property="Foreground" Value="{DynamicResource Text}"/>
+        <Setter Property="FontSize" Value="13"/>
+        <Setter Property="VerticalAlignment" Value="Center"/>
+    </Style>
+
+    <!-- ============ Карточка ============ -->
+    <Style Selector="Border.card">
+        <Setter Property="Background" Value="{DynamicResource Surface}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource Border}"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="CornerRadius" Value="12"/>
+        <Setter Property="Padding" Value="18"/>
+        <Setter Property="BoxShadow" Value="0 2 14 0 #12000000"/>
+    </Style>
+
+    <!-- ============ Кнопки ============ -->
+    <Style Selector="Button.primary">
+        <Setter Property="Background" Value="{DynamicResource Accent}"/>
+        <Setter Property="Foreground" Value="{DynamicResource OnAccent}"/>
+        <Setter Property="Padding" Value="18,10"/>
+        <Setter Property="CornerRadius" Value="8"/>
+        <Setter Property="FontWeight" Value="SemiBold"/>
+        <Setter Property="FontSize" Value="13.5"/>
+        <Setter Property="Cursor" Value="Hand"/>
+        <Setter Property="HorizontalContentAlignment" Value="Center"/>
+    </Style>
+    <Style Selector="Button.primary:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+        <Setter Property="Background" Value="{DynamicResource AccentHover}"/>
+        <Setter Property="TextBlock.Foreground" Value="{DynamicResource OnAccent}"/>
+    </Style>
+    <Style Selector="Button.primary:pressed /template/ ContentPresenter#PART_ContentPresenter">
+        <Setter Property="Background" Value="{DynamicResource AccentPressed}"/>
+    </Style>
+    <Style Selector="Button.primary:disabled /template/ ContentPresenter#PART_ContentPresenter">
+        <Setter Property="Background" Value="{DynamicResource Muted}"/>
+    </Style>
+
+    <Style Selector="Button.ghost">
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="Foreground" Value="{DynamicResource Accent}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource Accent}"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="Padding" Value="16,9"/>
+        <Setter Property="CornerRadius" Value="8"/>
+        <Setter Property="FontWeight" Value="SemiBold"/>
+        <Setter Property="Cursor" Value="Hand"/>
+    </Style>
+    <Style Selector="Button.ghost:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+        <Setter Property="Background" Value="{DynamicResource AccentSoft}"/>
+    </Style>
+
+    <!-- ============ Поля ввода ============ -->
+    <Style Selector="TextBox">
+        <Setter Property="CornerRadius" Value="8"/>
+        <Setter Property="Padding" Value="10,8"/>
+        <Setter Property="Background" Value="{DynamicResource InputBg}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource Border}"/>
+        <Setter Property="MinHeight" Value="38"/>
+    </Style>
+    <Style Selector="TextBox:focus /template/ Border#PART_BorderElement">
+        <Setter Property="BorderBrush" Value="{DynamicResource Accent}"/>
+    </Style>
+    <Style Selector="ComboBox">
+        <Setter Property="CornerRadius" Value="8"/>
+        <Setter Property="MinHeight" Value="38"/>
+        <Setter Property="Padding" Value="10,6"/>
+        <Setter Property="Background" Value="{DynamicResource InputBg}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource Border}"/>
+    </Style>
+    <Style Selector="DatePicker">
+        <Setter Property="CornerRadius" Value="8"/>
+        <Setter Property="MinHeight" Value="38"/>
+    </Style>
+
+    <!-- ============ Сайдбар-навигация ============ -->
+    <Style Selector="ListBox.nav">
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="Padding" Value="0"/>
+    </Style>
+    <Style Selector="ListBox.nav ListBoxItem">
+        <Setter Property="Foreground" Value="{DynamicResource SidebarText}"/>
+        <Setter Property="Padding" Value="14,11"/>
+        <Setter Property="Margin" Value="10,2"/>
+        <Setter Property="CornerRadius" Value="9"/>
+        <Setter Property="FontSize" Value="14"/>
+        <Setter Property="Cursor" Value="Hand"/>
+    </Style>
+    <Style Selector="ListBox.nav ListBoxItem:pointerover /template/ ContentPresenter">
+        <Setter Property="Background" Value="{DynamicResource SidebarActive}"/>
+    </Style>
+    <Style Selector="ListBox.nav ListBoxItem:selected /template/ ContentPresenter">
+        <Setter Property="Background" Value="{DynamicResource SidebarActive}"/>
+    </Style>
+    <Style Selector="ListBox.nav ListBoxItem:selected">
+        <Setter Property="Foreground" Value="White"/>
+        <Setter Property="FontWeight" Value="SemiBold"/>
+    </Style>
+
+    <!-- ============ Таблица ============ -->
+    <Style Selector="DataGrid">
+        <Setter Property="Background" Value="{DynamicResource Surface}"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="GridLinesVisibility" Value="Horizontal"/>
+        <Setter Property="HorizontalGridLinesBrush" Value="{DynamicResource Border}"/>
+        <Setter Property="RowBackground" Value="{DynamicResource Surface}"/>
+        <Setter Property="Foreground" Value="{DynamicResource Text}"/>
+        <Setter Property="RowHeight" Value="34"/>
+        <Setter Property="FontSize" Value="13"/>
+    </Style>
+    <Style Selector="DataGridColumnHeader">
+        <Setter Property="Background" Value="{DynamicResource Accent}"/>
+        <Setter Property="Foreground" Value="{DynamicResource OnAccent}"/>
+        <Setter Property="FontWeight" Value="SemiBold"/>
+        <Setter Property="FontSize" Value="13"/>
+        <Setter Property="Padding" Value="10,8"/>
+        <Setter Property="MinHeight" Value="36"/>
+        <Setter Property="SeparatorBrush" Value="#2FFFFFFF"/>
+    </Style>
+    <Style Selector="DataGridCell">
+        <Setter Property="Padding" Value="10,0"/>
+    </Style>
+    <Style Selector="DataGridRow:selected /template/ Rectangle#BackgroundRectangle">
+        <Setter Property="Fill" Value="{DynamicResource AccentSoft}"/>
+        <Setter Property="Opacity" Value="1"/>
+    </Style>
+</Styles>
--- a/src/Elfisa.Avalonia/ViewLocator.cs
+++ b/src/Elfisa.Avalonia/ViewLocator.cs
@ -0,0 +1,37 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using Avalonia.Controls;
+using Avalonia.Controls.Templates;
+using Elfisa.Avalonia.ViewModels;
+
+namespace Elfisa.Avalonia;
+
+/// <summary>
+/// Given a view model, returns the corresponding view if possible.
+/// </summary>
+[RequiresUnreferencedCode(
+    "Default implementation of ViewLocator involves reflection which may be trimmed away.",
+    Url = "https://docs.avaloniaui.net/docs/concepts/view-locator")]
+public class ViewLocator : IDataTemplate
+{
+    public Control? Build(object? param)
+    {
+        if (param is null)
+            return null;
+        
+        var name = param.GetType().FullName!.Replace("ViewModel", "View", StringComparison.Ordinal);
+        var type = Type.GetType(name);
+
+        if (type != null)
+        {
+            return (Control)Activator.CreateInstance(type)!;
+        }
+        
+        return new TextBlock { Text = "Not Found: " + name };
+    }
+
+    public bool Match(object? data)
+    {
+        return data is ViewModelBase;
+    }
+}
--- a/src/Elfisa.Avalonia/ViewModels/LoginViewModel.cs
+++ b/src/Elfisa.Avalonia/ViewModels/LoginViewModel.cs
@ -0,0 +1,44 @@
+using System;
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Elfisa.Core;
+
+namespace Elfisa.Avalonia.ViewModels;
+
+public partial class LoginViewModel : ViewModelBase
+{
+    private readonly Action _onSuccess;
+    private readonly ApiClient _api = new();
+
+    [ObservableProperty] private string _username = "";
+    [ObservableProperty] private string _password = "";
+    [ObservableProperty] private string? _error;
+    [ObservableProperty] private bool _busy;
+
+    public LoginViewModel(Action onSuccess) => _onSuccess = onSuccess;
+
+    [RelayCommand]
+    private async Task LoginAsync()
+    {
+        Error = null;
+        if (string.IsNullOrWhiteSpace(Username) || string.IsNullOrWhiteSpace(Password))
+        {
+            Error = "Введите логин и пароль.";
+            return;
+        }
+
+        try
+        {
+            Busy = true;
+            var resp = await _api.LoginAsync(Username.Trim(), Password);
+            Session.Current.Token = resp.Token;
+            Session.Current.Role = resp.Role;
+            Session.Current.Username = Username.Trim();
+            _onSuccess();
+        }
+        catch (ApiException ex) { Error = ex.Message; }
+        catch (Exception ex) { Error = "Не удалось войти: " + ex.Message; }
+        finally { Busy = false; }
+    }
+}
--- a/src/Elfisa.Avalonia/ViewModels/PlaceholderPageViewModel.cs
+++ b/src/Elfisa.Avalonia/ViewModels/PlaceholderPageViewModel.cs
@ -0,0 +1,15 @@
+namespace Elfisa.Avalonia.ViewModels;
+
+/// <summary>Заглушка ещё не портированного раздела.</summary>
+public partial class PlaceholderPageViewModel : ViewModelBase
+{
+    public string Title { get; }
+    public string Description { get; }
+    public string Note { get; } = "Раздел портируется на Avalonia. Пока доступен в WinForms-клиенте.";
+
+    public PlaceholderPageViewModel(string title, string description)
+    {
+        Title = title;
+        Description = description;
+    }
+}
--- a/src/Elfisa.Avalonia/ViewModels/ReportsViewModel.cs
+++ b/src/Elfisa.Avalonia/ViewModels/ReportsViewModel.cs
@ -0,0 +1,215 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Elfisa.Core;
+
+namespace Elfisa.Avalonia.ViewModels;
+
+public sealed class ReportColumn
+{
+    public string Header { get; init; } = "";
+    public bool Numeric { get; init; }
+    public double Weight { get; init; } = 100;   // ширина в пикселях (для нетянущихся)
+    public bool Stretch { get; init; }            // тянуть на всё свободное место (star)
+}
+
+/// <summary>Строка отчёта: ячейки как строки, доступ по индексу для DataGrid.</summary>
+public sealed class ReportRow
+{
+    private readonly string[] _cells;
+    public ReportRow(string[] cells) => _cells = cells;
+    public string this[int i] => i >= 0 && i < _cells.Length ? _cells[i] : "";
+}
+
+public partial class ReportsViewModel : ViewModelBase
+{
+    private readonly ApiClient _api = new();
+    private List<BuyerReportLineDto> _lines = new();
+
+    /// <summary>Сигнал View пересобрать колонки DataGrid.</summary>
+    public event Action? ColumnsChanged;
+
+    public ObservableCollection<ReportColumn> Columns { get; } = new();
+    public ObservableCollection<ReportRow> Rows { get; } = new();
+
+    [ObservableProperty] private DateTimeOffset _dateFrom = DateTimeOffset.Now.AddMonths(-1);
+    [ObservableProperty] private DateTimeOffset _dateTo = DateTimeOffset.Now;
+
+    public string[] ReportTypes { get; } = { "Мои заказы", "По поставщикам", "По товарам", "По аптекам" };
+    [ObservableProperty] private int _selectedReportIndex;
+
+    public string[] AiFormats { get; } = { "Word", "Excel" };
+    [ObservableProperty] private int _selectedAiFormat;
+    [ObservableProperty] private string _aiPrompt = "";
+
+    [ObservableProperty] private string _totals = "";
+    [ObservableProperty] private string? _status;
+    [ObservableProperty] private bool _busy;
+    [ObservableProperty] private bool _aiBusy;
+
+    public ReportsViewModel()
+    {
+        _api.SetToken(Session.Current.Token);
+        if (Session.Current.IsAuthenticated)
+            _ = BuildAsync();   // авто-загрузка за последний месяц при открытии
+    }
+
+    partial void OnSelectedReportIndexChanged(int value) => Render();
+
+    [RelayCommand]
+    private async Task BuildAsync()
+    {
+        Status = null;
+        try
+        {
+            Busy = true;
+            _lines = await _api.GetBuyerReportAsync(DateFrom.DateTime.Date, DateTo.DateTime.Date);
+            Render();
+            if (_lines.Count == 0) Status = "За выбранный период заказов нет.";
+        }
+        catch (Exception ex) { Status = ex.Message; }
+        finally { Busy = false; }
+    }
+
+    [RelayCommand]
+    private async Task GenerateAiAsync()
+    {
+        Status = null;
+        if (string.IsNullOrWhiteSpace(AiPrompt)) { Status = "Введите запрос для ИИ."; return; }
+        try
+        {
+            AiBusy = true;
+            var fmt = SelectedAiFormat == 1 ? "xlsx" : "docx";
+            var res = await _api.GenerateAiReportAsync(AiPrompt.Trim(), fmt);
+            var dir = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
+            var safe = string.Join("_", res.FileName.Split(Path.GetInvalidFileNameChars()));
+            var path = Path.Combine(dir, safe);
+            if (File.Exists(path))
+            {
+                var name = Path.GetFileNameWithoutExtension(safe);
+                var ext = Path.GetExtension(safe);
+                path = Path.Combine(dir, $"{name}_{DateTime.Now:yyyyMMdd_HHmmss}{ext}");
+            }
+            File.WriteAllBytes(path, res.Content);
+            Status = "Отчёт сохранён: " + path;
+            OpenFile(path);
+        }
+        catch (Exception ex) { Status = ex.Message; }
+        finally { AiBusy = false; }
+    }
+
+    private void Render()
+    {
+        Columns.Clear();
+        Rows.Clear();
+
+        var (cols, rows) = Aggregate(_lines, SelectedReportIndex);
+        foreach (var c in cols) Columns.Add(c);
+        foreach (var r in rows) Rows.Add(new ReportRow(r));
+
+        var orders = _lines.Select(l => l.OrderId).Distinct().Count();
+        var sum = _lines.Sum(l => l.Sum);
+        Totals = $"Заказов: {orders}    Позиций: {_lines.Count}    Сумма: {sum:N2}";
+        ColumnsChanged?.Invoke();
+    }
+
+    private static (List<ReportColumn> cols, List<string[]> rows) Aggregate(List<BuyerReportLineDto> lines, int type)
+    {
+        string N2(decimal d) => d.ToString("N2");
+        string N3(decimal d) => d.ToString("N3");
+        string D(DateTime? dt) => dt?.ToLocalTime().ToString("dd.MM.yyyy") ?? "";
+
+        switch (type)
+        {
+            case 1: // По поставщикам
+            {
+                var cols = new List<ReportColumn>
+                {
+                    new() { Header = "Поставщик", Stretch = true },
+                    new() { Header = "Заказов", Numeric = true, Weight = 90 },
+                    new() { Header = "Позиций", Numeric = true, Weight = 90 },
+                    new() { Header = "Сумма", Numeric = true, Weight = 120 },
+                };
+                var rows = lines.GroupBy(l => string.IsNullOrWhiteSpace(l.Supplier) ? "(не указан)" : l.Supplier!)
+                    .OrderByDescending(g => g.Sum(x => x.Sum))
+                    .Select(g => new[] { g.Key, g.Select(x => x.OrderId).Distinct().Count().ToString(),
+                                         g.Count().ToString(), N2(g.Sum(x => x.Sum)) }).ToList();
+                return (cols, rows);
+            }
+            case 2: // По товарам
+            {
+                var cols = new List<ReportColumn>
+                {
+                    new() { Header = "Товар", Stretch = true },
+                    new() { Header = "Код", Weight = 100 },
+                    new() { Header = "Кол-во", Numeric = true, Weight = 100 },
+                    new() { Header = "Сумма", Numeric = true, Weight = 120 },
+                };
+                var rows = lines.GroupBy(l => ((l.ItemName ?? "").Trim() + "|" + (l.ItemCode ?? "")))
+                    .OrderByDescending(g => g.Sum(x => x.Sum))
+                    .Select(g => { var f = g.First(); return new[] { f.ItemName ?? "", f.ItemCode ?? "",
+                                         N3(g.Sum(x => x.Qty)), N2(g.Sum(x => x.Sum)) }; }).ToList();
+                return (cols, rows);
+            }
+            case 3: // По аптекам
+            {
+                var cols = new List<ReportColumn>
+                {
+                    new() { Header = "Аптека", Stretch = true },
+                    new() { Header = "Заказов", Numeric = true, Weight = 90 },
+                    new() { Header = "Позиций", Numeric = true, Weight = 90 },
+                    new() { Header = "Сумма", Numeric = true, Weight = 120 },
+                };
+                var rows = lines.GroupBy(l => string.IsNullOrWhiteSpace(l.Location) ? "(не указана)" : l.Location!)
+                    .OrderByDescending(g => g.Sum(x => x.Sum))
+                    .Select(g => new[] { g.Key, g.Select(x => x.OrderId).Distinct().Count().ToString(),
+                                         g.Count().ToString(), N2(g.Sum(x => x.Sum)) }).ToList();
+                return (cols, rows);
+            }
+            default: // Мои заказы
+            {
+                var cols = new List<ReportColumn>
+                {
+                    new() { Header = "Дата", Weight = 105 },
+                    new() { Header = "Номер", Weight = 138 },
+                    new() { Header = "Поставщик", Weight = 150 },
+                    new() { Header = "Аптека", Stretch = true },
+                    new() { Header = "Позиций", Numeric = true, Weight = 95 },
+                    new() { Header = "Сумма", Numeric = true, Weight = 125 },
+                    new() { Header = "Статус", Weight = 100 },
+                };
+                var rows = lines.GroupBy(l => l.OrderId)
+                    .OrderByDescending(g => g.First().OrderDate ?? DateTime.MinValue)
+                    .Select(g =>
+                    {
+                        var f = g.First();
+                        var sup = string.Join(", ", g.Select(x => x.Supplier).Where(s => !string.IsNullOrWhiteSpace(s)).Distinct());
+                        return new[] { D(f.OrderDate), f.GlobalSign ?? "", sup, f.Location ?? "",
+                                       g.Count().ToString(), N2(g.Sum(x => x.Sum)), f.Status ?? "" };
+                    }).ToList();
+                return (cols, rows);
+            }
+        }
+    }
+
+    private static void OpenFile(string path)
+    {
+        try
+        {
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+                Process.Start(new ProcessStartInfo { FileName = path, UseShellExecute = true });
+            else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+                Process.Start("open", $"\"{path}\"");
+            else
+                Process.Start("xdg-open", $"\"{path}\"");
+        }
+        catch { /* открыть не удалось — путь показан в статусе */ }
+    }
+}
--- a/src/Elfisa.Avalonia/ViewModels/RootViewModel.cs
+++ b/src/Elfisa.Avalonia/ViewModels/RootViewModel.cs
@ -0,0 +1,48 @@
+using System;
+using Elfisa.Core;
+
+namespace Elfisa.Avalonia.ViewModels;
+
+/// <summary>Корневой VM: переключает экран входа и основной шелл.</summary>
+public partial class RootViewModel : ViewModelBase
+{
+    private ViewModelBase _current = null!;
+    public ViewModelBase Current
+    {
+        get => _current;
+        private set => SetProperty(ref _current, value);
+    }
+
+    public RootViewModel()
+    {
+        Current = new LoginViewModel(OnLoggedIn);
+        TryDevAutoLogin();
+    }
+
+    // Dev-режим: если заданы ELF_DEV_USER/ELF_DEV_PASS — входим автоматически.
+    // Обычных пользователей не затрагивает (переменных нет).
+    private async void TryDevAutoLogin()
+    {
+        var u = Environment.GetEnvironmentVariable("ELF_DEV_USER");
+        var p = Environment.GetEnvironmentVariable("ELF_DEV_PASS");
+        if (string.IsNullOrWhiteSpace(u) || string.IsNullOrWhiteSpace(p)) return;
+        try
+        {
+            var api = new ApiClient();
+            var resp = await api.LoginAsync(u, p);
+            Session.Current.Token = resp.Token;
+            Session.Current.Role = resp.Role;
+            Session.Current.Username = u;
+            OnLoggedIn();
+        }
+        catch { /* остаёмся на экране входа */ }
+    }
+
+    private void OnLoggedIn() => Current = new ShellViewModel(Logout);
+
+    private void Logout()
+    {
+        Session.Current.Clear();
+        Current = new LoginViewModel(OnLoggedIn);
+    }
+}
--- a/src/Elfisa.Avalonia/ViewModels/ShellViewModel.cs
+++ b/src/Elfisa.Avalonia/ViewModels/ShellViewModel.cs
@ -0,0 +1,59 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Linq;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Elfisa.Core;
+
+namespace Elfisa.Avalonia.ViewModels;
+
+public class NavItem
+{
+    public string Title { get; }
+    public string Icon { get; }
+    public Func<ViewModelBase> Factory { get; }
+    public NavItem(string title, string icon, Func<ViewModelBase> factory)
+    {
+        Title = title; Icon = icon; Factory = factory;
+    }
+}
+
+public partial class ShellViewModel : ViewModelBase
+{
+    private readonly Action _logout;
+
+    public ObservableCollection<NavItem> NavItems { get; }
+
+    [ObservableProperty] private NavItem? _selectedNav;
+    [ObservableProperty] private ViewModelBase? _currentPage;
+
+    public string UserName => Session.Current.Username ?? "";
+    public string RoleLabel => Session.Current.Role switch
+    {
+        "buyer" => "Покупатель",
+        "supplier" => "Поставщик",
+        "manager" => "Менеджер",
+        "admin" => "Администратор",
+        _ => Session.Current.Role ?? ""
+    };
+
+    public ShellViewModel(Action logout)
+    {
+        _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.")),
+        };
+        SelectedNav = NavItems.First(n => n.Title == "Отчёты");
+    }
+
+    partial void OnSelectedNavChanged(NavItem? value) => CurrentPage = value?.Factory();
+
+    [RelayCommand] private void Logout() => _logout();
+}
--- a/src/Elfisa.Avalonia/ViewModels/ViewModelBase.cs
+++ b/src/Elfisa.Avalonia/ViewModels/ViewModelBase.cs
@ -0,0 +1,7 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace Elfisa.Avalonia.ViewModels;
+
+public abstract class ViewModelBase : ObservableObject
+{
+}
--- a/src/Elfisa.Avalonia/Views/LoginView.axaml
+++ b/src/Elfisa.Avalonia/Views/LoginView.axaml
@ -0,0 +1,39 @@
+<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.LoginView"
+             x:DataType="vm:LoginViewModel">
+
+    <Grid Background="{DynamicResource Bg}">
+        <Border Classes="card" Width="390" Padding="30"
+                HorizontalAlignment="Center" VerticalAlignment="Center">
+            <StackPanel Spacing="16">
+                <StackPanel Spacing="2" Margin="0,0,0,6">
+                    <TextBlock Text="ЭльФиСА" FontSize="28" FontWeight="Bold"
+                               Foreground="{DynamicResource Accent}" HorizontalAlignment="Center"/>
+                    <TextBlock Text="Электронная Фармация" Classes="muted" HorizontalAlignment="Center"/>
+                </StackPanel>
+
+                <StackPanel Spacing="6">
+                    <TextBlock Text="Логин" Classes="label"/>
+                    <TextBox Text="{Binding Username}" Watermark="e-mail или логин"/>
+                </StackPanel>
+
+                <StackPanel Spacing="6">
+                    <TextBlock Text="Пароль" Classes="label"/>
+                    <TextBox Text="{Binding Password}" PasswordChar="●" Watermark="пароль"/>
+                </StackPanel>
+
+                <Border Background="#1FDC2626" CornerRadius="6" Padding="10,7"
+                        IsVisible="{Binding Error, Converter={x:Static conv:ObjectConverters.IsNotNull}}">
+                    <TextBlock Text="{Binding Error}" Foreground="#DC2626" TextWrapping="Wrap" FontSize="12.5"/>
+                </Border>
+
+                <Button Classes="primary" Content="Войти" IsDefault="True"
+                        HorizontalAlignment="Stretch" Margin="0,4,0,0"
+                        Command="{Binding LoginCommand}" IsEnabled="{Binding !Busy}"/>
+            </StackPanel>
+        </Border>
+    </Grid>
+</UserControl>
--- a/src/Elfisa.Avalonia/Views/LoginView.axaml.cs
+++ b/src/Elfisa.Avalonia/Views/LoginView.axaml.cs
@ -0,0 +1,9 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace Elfisa.Avalonia.Views;
+
+public partial class LoginView : UserControl
+{
+    public LoginView() => AvaloniaXamlLoader.Load(this);
+}
--- a/src/Elfisa.Avalonia/Views/MainWindow.axaml
+++ b/src/Elfisa.Avalonia/Views/MainWindow.axaml
@ -0,0 +1,16 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="using:Elfisa.Avalonia.ViewModels"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d" d:DesignWidth="1200" d:DesignHeight="740"
+        x:Class="Elfisa.Avalonia.Views.MainWindow"
+        x:DataType="vm:RootViewModel"
+        Icon="/Assets/avalonia-logo.ico"
+        Width="1200" Height="740" MinWidth="920" MinHeight="600"
+        Background="{DynamicResource Bg}"
+        Title="ЭльФиСА">
+
+    <ContentControl Content="{Binding Current}"/>
+
+</Window>
--- a/src/Elfisa.Avalonia/Views/MainWindow.axaml.cs
+++ b/src/Elfisa.Avalonia/Views/MainWindow.axaml.cs
@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace Elfisa.Avalonia.Views;
+
+public partial class MainWindow : Window
+{
+    public MainWindow()
+    {
+        InitializeComponent();
+    }
+}
--- a/src/Elfisa.Avalonia/Views/PlaceholderPageView.axaml
+++ b/src/Elfisa.Avalonia/Views/PlaceholderPageView.axaml
@ -0,0 +1,24 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:Elfisa.Avalonia.ViewModels"
+             x:Class="Elfisa.Avalonia.Views.PlaceholderPageView"
+             x:DataType="vm:PlaceholderPageViewModel">
+
+    <Grid Margin="28" RowDefinitions="Auto,*">
+        <StackPanel Grid.Row="0" Spacing="4">
+            <TextBlock Text="{Binding Title}" Classes="h1"/>
+            <TextBlock Text="{Binding Description}" Classes="muted"/>
+        </StackPanel>
+
+        <Border Grid.Row="1" Classes="card" MaxWidth="480" Padding="34"
+                HorizontalAlignment="Center" VerticalAlignment="Center">
+            <StackPanel Spacing="14" HorizontalAlignment="Center">
+                <Border Width="56" Height="56" CornerRadius="28" Background="{DynamicResource AccentSoft}">
+                    <TextBlock Text="⏳" FontSize="24" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                </Border>
+                <TextBlock Text="Скоро" Classes="h2" HorizontalAlignment="Center"/>
+                <TextBlock Text="{Binding Note}" Classes="muted" TextWrapping="Wrap" TextAlignment="Center"/>
+            </StackPanel>
+        </Border>
+    </Grid>
+</UserControl>
--- a/src/Elfisa.Avalonia/Views/PlaceholderPageView.axaml.cs
+++ b/src/Elfisa.Avalonia/Views/PlaceholderPageView.axaml.cs
@ -0,0 +1,9 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace Elfisa.Avalonia.Views;
+
+public partial class PlaceholderPageView : UserControl
+{
+    public PlaceholderPageView() => AvaloniaXamlLoader.Load(this);
+}
--- a/src/Elfisa.Avalonia/Views/ReportsView.axaml
+++ b/src/Elfisa.Avalonia/Views/ReportsView.axaml
@ -0,0 +1,58 @@
+<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.ReportsView"
+             x:DataType="vm:ReportsViewModel">
+
+    <DockPanel Margin="24">
+
+        <!-- Заголовок -->
+        <Grid DockPanel.Dock="Top" Margin="0,0,0,14">
+            <StackPanel Spacing="2" VerticalAlignment="Center">
+                <TextBlock Text="Отчёты" Classes="h1"/>
+                <TextBlock Text="Данные только по вашим заказам" Classes="muted"/>
+            </StackPanel>
+            <TextBlock Text="{Binding Totals}" HorizontalAlignment="Right" VerticalAlignment="Center"
+                       FontWeight="SemiBold" Foreground="{DynamicResource Accent}"/>
+        </Grid>
+
+        <!-- Панель управления -->
+        <Border DockPanel.Dock="Top" Classes="card" Margin="0,0,0,12" Padding="16">
+            <StackPanel Spacing="12">
+                <WrapPanel Orientation="Horizontal">
+                    <TextBlock Text="С" Classes="label" Margin="0,0,8,6"/>
+                    <DatePicker SelectedDate="{Binding DateFrom}" Margin="0,0,10,6"/>
+                    <TextBlock Text="по" Classes="label" Margin="0,0,8,6"/>
+                    <DatePicker SelectedDate="{Binding DateTo}" Margin="0,0,10,6"/>
+                    <ComboBox ItemsSource="{Binding ReportTypes}" SelectedIndex="{Binding SelectedReportIndex}" Width="170" Margin="0,0,10,6"/>
+                    <Button Classes="primary" Content="Сформировать" Command="{Binding BuildCommand}" IsEnabled="{Binding !Busy}" Margin="0,0,0,6"/>
+                </WrapPanel>
+
+                <Border Height="1" Background="{DynamicResource Border}"/>
+
+                <WrapPanel Orientation="Horizontal">
+                    <TextBlock Text="Запрос ИИ" Classes="label" Margin="0,0,8,6"/>
+                    <TextBox Text="{Binding AiPrompt}" Width="420" Margin="0,0,10,6"
+                             Watermark="напр.: «закупки по поставщикам за июль», «заказы за всё время с товарами»"/>
+                    <ComboBox ItemsSource="{Binding AiFormats}" SelectedIndex="{Binding SelectedAiFormat}" Width="100" Margin="0,0,10,6"/>
+                    <Button Classes="primary" Content="Сформировать ИИ" Command="{Binding GenerateAiCommand}" IsEnabled="{Binding !AiBusy}" Margin="0,0,0,6"/>
+                </WrapPanel>
+            </StackPanel>
+        </Border>
+
+        <!-- Статус -->
+        <Border DockPanel.Dock="Top" Margin="0,0,0,10" Padding="10,7" CornerRadius="6"
+                Background="{DynamicResource AccentSoft}"
+                IsVisible="{Binding Status, Converter={x:Static conv:ObjectConverters.IsNotNull}}">
+            <TextBlock Text="{Binding Status}" Foreground="{DynamicResource AccentPressed}" TextWrapping="Wrap" FontSize="12.5"/>
+        </Border>
+
+        <!-- Таблица -->
+        <Border Classes="card" Padding="0" ClipToBounds="True">
+            <DataGrid x:Name="Grid" ItemsSource="{Binding Rows}"
+                      AutoGenerateColumns="False" IsReadOnly="True"
+                      HeadersVisibility="Column" CanUserResizeColumns="True" CanUserSortColumns="False"/>
+        </Border>
+    </DockPanel>
+</UserControl>
--- a/src/Elfisa.Avalonia/Views/ReportsView.axaml.cs
+++ b/src/Elfisa.Avalonia/Views/ReportsView.axaml.cs
@ -0,0 +1,60 @@
+using System;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.Templates;
+using Avalonia.Layout;
+using Avalonia.Media;
+using Elfisa.Avalonia.ViewModels;
+
+namespace Elfisa.Avalonia.Views;
+
+public partial class ReportsView : UserControl
+{
+    private ReportsViewModel? _vm;
+
+    public ReportsView()
+    {
+        InitializeComponent();
+        DataContextChanged += OnDataContextChanged;
+    }
+
+    private void OnDataContextChanged(object? sender, EventArgs e)
+    {
+        if (_vm != null) _vm.ColumnsChanged -= RebuildColumns;
+        _vm = DataContext as ReportsViewModel;
+        if (_vm != null)
+        {
+            _vm.ColumnsChanged += RebuildColumns;
+            RebuildColumns();
+        }
+    }
+
+    // DataGrid не умеет динамические колонки через биндинг — строим их из VM в коде.
+    private void RebuildColumns()
+    {
+        Grid.Columns.Clear();
+        if (_vm == null) return;
+
+        for (int i = 0; i < _vm.Columns.Count; i++)
+        {
+            int idx = i;
+            var c = _vm.Columns[i];
+            Grid.Columns.Add(new DataGridTemplateColumn
+            {
+                Header = c.Header,
+                // одна тянущаяся колонка (star) заполняет свободное место, остальные фикс. пиксель
+                Width = c.Stretch
+                    ? new DataGridLength(1, DataGridLengthUnitType.Star)
+                    : new DataGridLength(c.Weight, DataGridLengthUnitType.Pixel),
+                MinWidth = 56,
+                CellTemplate = new FuncDataTemplate<ReportRow>((row, _) => new TextBlock
+                {
+                    Text = row?[idx] ?? "",
+                    VerticalAlignment = VerticalAlignment.Center,
+                    TextAlignment = c.Numeric ? TextAlignment.Right : TextAlignment.Left,
+                    TextTrimming = TextTrimming.CharacterEllipsis
+                })
+            });
+        }
+    }
+}
--- a/src/Elfisa.Avalonia/Views/ShellView.axaml
+++ b/src/Elfisa.Avalonia/Views/ShellView.axaml
@ -0,0 +1,50 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:Elfisa.Avalonia.ViewModels"
+             x:Class="Elfisa.Avalonia.Views.ShellView"
+             x:DataType="vm:ShellViewModel">
+
+    <Grid ColumnDefinitions="250,*">
+
+        <!-- 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"/>
+                </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"
+                         ItemsSource="{Binding NavItems}" SelectedItem="{Binding SelectedNav}">
+                    <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>
+                        </DataTemplate>
+                    </ListBox.ItemTemplate>
+                </ListBox>
+            </DockPanel>
+        </Border>
+
+        <!-- Контент -->
+        <ContentControl Grid.Column="1" Content="{Binding CurrentPage}"/>
+    </Grid>
+</UserControl>
--- a/src/Elfisa.Avalonia/Views/ShellView.axaml.cs
+++ b/src/Elfisa.Avalonia/Views/ShellView.axaml.cs
@ -0,0 +1,9 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace Elfisa.Avalonia.Views;
+
+public partial class ShellView : UserControl
+{
+    public ShellView() => AvaloniaXamlLoader.Load(this);
+}
--- a/src/Elfisa.Avalonia/app.manifest
+++ b/src/Elfisa.Avalonia/app.manifest
@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <!-- This manifest is used on Windows only.
+       Don't remove it as it might cause problems with window transparency and embedded controls.
+       For more details visit https://learn.microsoft.com/en-us/windows/win32/sbscs/application-manifests -->
+  <assemblyIdentity version="1.0.0.0" name="Elfisa.Avalonia.Desktop"/>
+
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <!-- A list of the Windows versions that this application has been tested on
+           and is designed to work with. Uncomment the appropriate elements
+           and Windows will automatically select the most compatible environment. -->
+
+      <!-- Windows 10 -->
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
+    </application>
+  </compatibility>
+</assembly>
--- a/src/Elfisa.Core/ApiClient.cs
+++ b/src/Elfisa.Core/ApiClient.cs
@ -0,0 +1,130 @@
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Text;
+using System.Text.Json;
+
+namespace Elfisa.Core;
+
+/// <summary>
+/// Клиент платформы. Портирован из WinForms-версии, оставлены методы,
+/// нужные новому Avalonia-клиенту: логин, отчёт покупателя, ИИ-отчёт.
+/// Остальные эндпоинты добавляются по мере портирования экранов.
+/// </summary>
+public sealed class ApiClient
+{
+    private static readonly JsonSerializerOptions Json = new() { PropertyNamingPolicy = null };
+
+    private readonly HttpClient _http;
+    private readonly string _baseUrl;
+    private string? _token;
+
+    public ApiClient(string? baseUrl = null)
+    {
+        _baseUrl = (baseUrl ?? AppConfig.ApiBaseUrl).TrimEnd('/');
+        _http = new HttpClient { Timeout = TimeSpan.FromSeconds(120) };
+    }
+
+    public string BaseUrl => _baseUrl;
+    public string? Token => _token;
+    public bool IsAuthenticated => !string.IsNullOrEmpty(_token);
+
+    public void SetToken(string? token) => _token = string.IsNullOrWhiteSpace(token) ? null : token;
+
+    private string Url(string path) => new Uri(new Uri(_baseUrl + "/"), path.TrimStart('/')).ToString();
+
+    /// <summary>Логин. Возвращает (token, role) либо бросает с понятным сообщением.</summary>
+    public async Task<LoginResponse> LoginAsync(string username, string password)
+    {
+        var body = JsonSerializer.Serialize(new LoginRequest { Username = username, Password = password }, Json);
+        using var req = new HttpRequestMessage(HttpMethod.Post, Url("/auth/login"))
+        {
+            Content = new StringContent(body, Encoding.UTF8, "application/json")
+        };
+        HttpResponseMessage resp;
+        try { resp = await _http.SendAsync(req).ConfigureAwait(false); }
+        catch (Exception ex) { throw new ApiException($"Не удалось связаться с сервером ({_baseUrl}): {ex.Message}", ex); }
+
+        var text = await resp.Content.ReadAsStringAsync().ConfigureAwait(false);
+        if (resp.StatusCode == HttpStatusCode.Unauthorized)
+            throw new ApiException("Неверный логин или пароль.");
+        if (resp.StatusCode == (HttpStatusCode)429)
+            throw new ApiException("Слишком много запросов. Подождите немного и повторите.");
+        if (!resp.IsSuccessStatusCode)
+            throw new ApiException(TryError(text) ?? $"Ошибка авторизации ({(int)resp.StatusCode}).");
+
+        var login = JsonSerializer.Deserialize<LoginResponse>(text, Json);
+        if (login is null || string.IsNullOrWhiteSpace(login.Token))
+            throw new ApiException("Сервер вернул пустой токен.");
+        _token = login.Token;
+        return login;
+    }
+
+    /// <summary>Отчёт покупателя за период (скоуп по JWT на сервере — только свои заказы).</summary>
+    public async Task<List<BuyerReportLineDto>> GetBuyerReportAsync(DateTime from, DateTime to)
+    {
+        EnsureAuth();
+        var path = $"/api/buyer/report?date_from={from:yyyy-MM-dd}&date_to={to:yyyy-MM-dd}";
+        var text = await AuthorizedGetAsync(path, "формирование отчёта").ConfigureAwait(false);
+        var resp = JsonSerializer.Deserialize<BuyerReportResponse>(text, Json);
+        return resp?.Lines ?? new List<BuyerReportLineDto>();
+    }
+
+    /// <summary>Свободный запрос к ИИ -> готовый Word/Excel (сервис на Mac mini через /ai).</summary>
+    public async Task<AiReportResult> GenerateAiReportAsync(string prompt, string format = "docx")
+    {
+        EnsureAuth();
+        if (string.IsNullOrWhiteSpace(prompt)) throw new ApiException("Пустой запрос для ИИ.");
+        var aiUrl = new Uri(new Uri(AppConfig.AiBaseUrl.TrimEnd('/') + "/"), "generate").ToString();
+        var body = JsonSerializer.Serialize(new AiReportRequest { Prompt = prompt, Token = _token!, Format = format }, Json);
+        using var req = new HttpRequestMessage(HttpMethod.Post, aiUrl)
+        {
+            Content = new StringContent(body, Encoding.UTF8, "application/json")
+        };
+        HttpResponseMessage resp;
+        try { resp = await _http.SendAsync(req).ConfigureAwait(false); }
+        catch (Exception ex) { throw new ApiException($"ИИ-сервис недоступен: {ex.Message}", ex); }
+
+        if (!resp.IsSuccessStatusCode)
+        {
+            var err = await resp.Content.ReadAsStringAsync().ConfigureAwait(false);
+            throw new ApiException($"ИИ-сервис вернул {(int)resp.StatusCode}: {TryError(err) ?? err}");
+        }
+        var bytes = await resp.Content.ReadAsByteArrayAsync().ConfigureAwait(false);
+        var name = resp.Content.Headers.ContentDisposition?.FileNameStar
+                   ?? resp.Content.Headers.ContentDisposition?.FileName
+                   ?? (format == "xlsx" ? "Отчёт.xlsx" : "Отчёт.docx");
+        return new AiReportResult { Content = bytes, FileName = name.Trim('"') };
+    }
+
+    private async Task<string> AuthorizedGetAsync(string path, string op)
+    {
+        using var req = new HttpRequestMessage(HttpMethod.Get, Url(path));
+        req.Headers.Authorization = new AuthenticationHeaderValue("Bearer", _token);
+        HttpResponseMessage resp;
+        try { resp = await _http.SendAsync(req).ConfigureAwait(false); }
+        catch (Exception ex) { throw new ApiException($"Не удалось выполнить {op}: {ex.Message}", ex); }
+
+        var text = await resp.Content.ReadAsStringAsync().ConfigureAwait(false);
+        if (resp.StatusCode == HttpStatusCode.Unauthorized) { _token = null; throw new ApiException("Сессия истекла, войдите снова."); }
+        if (!resp.IsSuccessStatusCode) throw new ApiException(TryError(text) ?? $"Ошибка сервера ({(int)resp.StatusCode}) при {op}.");
+        return text;
+    }
+
+    private void EnsureAuth()
+    {
+        if (!IsAuthenticated) throw new ApiException("Требуется авторизация.");
+    }
+
+    private static string? TryError(string body)
+    {
+        if (string.IsNullOrWhiteSpace(body)) return null;
+        try { return JsonSerializer.Deserialize<ErrorResponse>(body, Json)?.Error; }
+        catch { return null; }
+    }
+}
+
+public sealed class ApiException : Exception
+{
+    public ApiException(string message, Exception? inner = null) : base(message, inner) { }
+}
--- a/src/Elfisa.Core/AppConfig.cs
+++ b/src/Elfisa.Core/AppConfig.cs
@ -0,0 +1,33 @@
+namespace Elfisa.Core;
+
+/// <summary>
+/// Базовые адреса платформы. Совпадают с десктопом WinForms:
+/// API — https://24pharmdata.ru, ИИ-отчёты — https://24pharmdata.ru/ai.
+/// Можно переопределить переменными окружения.
+/// </summary>
+public static class AppConfig
+{
+    public const string DefaultApiBaseUrl = "https://24pharmdata.ru";
+    public const string DefaultAiBaseUrl  = "https://24pharmdata.ru/ai";
+
+    private const string ApiEnv = "ELF_API_BASE_URL";
+    private const string AiEnv  = "ELF_AI_BASE_URL";
+
+    public static string ApiBaseUrl
+    {
+        get
+        {
+            var env = Environment.GetEnvironmentVariable(ApiEnv);
+            return string.IsNullOrWhiteSpace(env) ? DefaultApiBaseUrl : env.Trim().TrimEnd('/');
+        }
+    }
+
+    public static string AiBaseUrl
+    {
+        get
+        {
+            var env = Environment.GetEnvironmentVariable(AiEnv);
+            return string.IsNullOrWhiteSpace(env) ? DefaultAiBaseUrl : env.Trim().TrimEnd('/');
+        }
+    }
+}
--- a/src/Elfisa.Core/Dtos.cs
+++ b/src/Elfisa.Core/Dtos.cs
@ -0,0 +1,54 @@
+using System.Text.Json.Serialization;
+
+namespace Elfisa.Core;
+
+public sealed class LoginRequest
+{
+    [JsonPropertyName("username")] public string Username { get; set; } = "";
+    [JsonPropertyName("password")] public string Password { get; set; } = "";
+}
+
+public sealed class LoginResponse
+{
+    [JsonPropertyName("token")] public string? Token { get; set; }
+    [JsonPropertyName("role")] public string? Role { get; set; }
+    [JsonPropertyName("redirect_url")] public string? RedirectUrl { get; set; }
+}
+
+public sealed class BuyerReportResponse
+{
+    [JsonPropertyName("lines")] public List<BuyerReportLineDto>? Lines { get; set; }
+}
+
+public sealed class BuyerReportLineDto
+{
+    [JsonPropertyName("order_id")] public string? OrderId { get; set; }
+    [JsonPropertyName("global_sign")] public string? GlobalSign { get; set; }
+    [JsonPropertyName("order_date")] public DateTime? OrderDate { get; set; }
+    [JsonPropertyName("status")] public string? Status { get; set; }
+    [JsonPropertyName("supplier")] public string? Supplier { get; set; }
+    [JsonPropertyName("location")] public string? Location { get; set; }
+    [JsonPropertyName("item_name")] public string? ItemName { get; set; }
+    [JsonPropertyName("item_code")] public string? ItemCode { get; set; }
+    [JsonPropertyName("qty")] public decimal Qty { get; set; }
+    [JsonPropertyName("unit_price")] public decimal UnitPrice { get; set; }
+    [JsonPropertyName("sum")] public decimal Sum { get; set; }
+}
+
+public sealed class AiReportRequest
+{
+    [JsonPropertyName("prompt")] public string Prompt { get; set; } = "";
+    [JsonPropertyName("token")] public string Token { get; set; } = "";
+    [JsonPropertyName("format")] public string Format { get; set; } = "docx";
+}
+
+public sealed class AiReportResult
+{
+    public byte[] Content { get; set; } = Array.Empty<byte>();
+    public string FileName { get; set; } = "report.docx";
+}
+
+public sealed class ErrorResponse
+{
+    [JsonPropertyName("error")] public string? Error { get; set; }
+}
--- a/src/Elfisa.Core/Elfisa.Core.csproj
+++ b/src/Elfisa.Core/Elfisa.Core.csproj
@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
--- a/src/Elfisa.Core/Session.cs
+++ b/src/Elfisa.Core/Session.cs
@ -0,0 +1,20 @@
+namespace Elfisa.Core;
+
+/// <summary>Текущая сессия пользователя (токен, роль, логин).</summary>
+public sealed class Session
+{
+    public static Session Current { get; } = new();
+
+    public string? Token { get; set; }
+    public string? Role { get; set; }
+    public string? Username { get; set; }
+
+    public bool IsAuthenticated => !string.IsNullOrWhiteSpace(Token);
+
+    public void Clear()
+    {
+        Token = null;
+        Role = null;
+        Username = null;
+    }
+}