Replace sparkbooth upload with photobooth uploader

PhotoboothUploader/App.axaml

@@ -0,0 +1,90 @@
+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="PhotoboothUploader.App"
+             RequestedThemeVariant="Default">
+             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
+
+    <Application.Styles>
+        <FluentTheme />
+        <Style>
+            <Style.Resources>
+                <Color x:Key="BrandRose">#FFB6C1</Color>
+                <Color x:Key="BrandRoseStrong">#FF69B4</Color>
+                <Color x:Key="BrandRoseSoft">#FFE5EC</Color>
+                <Color x:Key="BrandGold">#FFD700</Color>
+                <Color x:Key="BrandSky">#87CEEB</Color>
+                <Color x:Key="BrandSkySoft">#E0F5FF</Color>
+                <Color x:Key="BrandNavy">#0F4C75</Color>
+                <Color x:Key="BrandSlate">#1F2937</Color>
+                <Color x:Key="BrandCream">#FFF8F5</Color>
+
+                <SolidColorBrush x:Key="TextPrimaryBrush" Color="{DynamicResource BrandSlate}" />
+                <SolidColorBrush x:Key="TextMutedBrush" Color="#6B7280" />
+                <SolidColorBrush x:Key="CardBorderBrush" Color="{DynamicResource BrandRoseSoft}" />
+                <SolidColorBrush x:Key="CardBackgroundBrush" Color="#FFFFFF" />
+                <SolidColorBrush x:Key="AccentBackgroundBrush" Color="{DynamicResource BrandSkySoft}" />
+                <SolidColorBrush x:Key="InputBorderBrush" Color="{DynamicResource BrandRoseSoft}" />
+                <SolidColorBrush x:Key="InputBackgroundBrush" Color="#FFFFFF" />
+                <SolidColorBrush x:Key="PrimaryButtonBrush" Color="{DynamicResource BrandRoseStrong}" />
+                <SolidColorBrush x:Key="PrimaryButtonTextBrush" Color="#FFFFFF" />
+                <SolidColorBrush x:Key="SecondaryButtonBrush" Color="{DynamicResource BrandSky}" />
+                <SolidColorBrush x:Key="SecondaryButtonTextBrush" Color="{DynamicResource BrandNavy}" />
+
+                <LinearGradientBrush x:Key="WindowBackgroundBrush" StartPoint="0,0" EndPoint="1,1">
+                    <GradientStop Color="{DynamicResource BrandCream}" Offset="0" />
+                    <GradientStop Color="{DynamicResource BrandRoseSoft}" Offset="0.5" />
+                    <GradientStop Color="{DynamicResource BrandSkySoft}" Offset="1" />
+                </LinearGradientBrush>
+            </Style.Resources>
+        </Style>
+
+        <Style Selector="Window">
+            <Setter Property="Background" Value="{DynamicResource WindowBackgroundBrush}" />
+            <Setter Property="FontFamily" Value="Inter" />
+            <Setter Property="Foreground" Value="{DynamicResource TextPrimaryBrush}" />
+        </Style>
+
+        <Style Selector="TextBlock.title">
+            <Setter Property="FontSize" Value="20" />
+            <Setter Property="FontWeight" Value="SemiBold" />
+        </Style>
+
+        <Style Selector="TextBlock.subtitle">
+            <Setter Property="FontSize" Value="12" />
+            <Setter Property="Foreground" Value="{DynamicResource TextMutedBrush}" />
+        </Style>
+
+        <Style Selector="Border.card">
+            <Setter Property="Background" Value="{DynamicResource CardBackgroundBrush}" />
+            <Setter Property="BorderBrush" Value="{DynamicResource CardBorderBrush}" />
+            <Setter Property="BorderThickness" Value="1" />
+            <Setter Property="CornerRadius" Value="12" />
+        </Style>
+
+        <Style Selector="Border.card.accent">
+            <Setter Property="Background" Value="{DynamicResource AccentBackgroundBrush}" />
+        </Style>
+
+        <Style Selector="TextBox">
+            <Setter Property="BorderBrush" Value="{DynamicResource InputBorderBrush}" />
+            <Setter Property="Background" Value="{DynamicResource InputBackgroundBrush}" />
+            <Setter Property="CornerRadius" Value="8" />
+            <Setter Property="Padding" Value="10,8" />
+        </Style>
+
+        <Style Selector="Button">
+            <Setter Property="CornerRadius" Value="8" />
+            <Setter Property="Padding" Value="12,8" />
+        </Style>
+
+        <Style Selector="Button.primary">
+            <Setter Property="Background" Value="{DynamicResource PrimaryButtonBrush}" />
+            <Setter Property="Foreground" Value="{DynamicResource PrimaryButtonTextBrush}" />
+        </Style>
+
+        <Style Selector="Button.secondary">
+            <Setter Property="Background" Value="{DynamicResource SecondaryButtonBrush}" />
+            <Setter Property="Foreground" Value="{DynamicResource SecondaryButtonTextBrush}" />
+        </Style>
+    </Application.Styles>
+</Application>

PhotoboothUploader/App.axaml.cs

@@ -0,0 +1,23 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace PhotoboothUploader;
+
+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();
+        }
+
+        base.OnFrameworkInitializationCompleted();
+    }
+}

PhotoboothUploader/MainWindow.axaml

@@ -0,0 +1,142 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d" d:DesignWidth="520" d:DesignHeight="360"
+        x:Class="PhotoboothUploader.MainWindow"
+        Width="560" Height="420"
+        MinWidth="520" MinHeight="400"
+        Title="AI Stylegallery - Photobooth Uploader">
+    <Grid Margin="24,32,24,24" RowDefinitions="Auto,*">
+        <StackPanel Grid.Row="0" Orientation="Horizontal" Spacing="12" VerticalAlignment="Center">
+            <Border Width="40" Height="40" Classes="card accent" VerticalAlignment="Center" HorizontalAlignment="Left">
+                <Image Source="avares://PhotoboothUploader/Assets/logo.png" Width="28" Height="28" HorizontalAlignment="Center" VerticalAlignment="Center" />
+            </Border>
+            <StackPanel Spacing="2">
+                <TextBlock x:Name="TitleText"
+                           Text="AI Stylegallery - Photobooth Uploader"
+                           Classes="title" />
+                <TextBlock Text="Sicherer Upload der Fotobox-Fotos ins Event." Classes="subtitle" />
+            </StackPanel>
+        </StackPanel>
+
+        <Grid Grid.Row="1" ColumnDefinitions="*,16,*">
+            <StackPanel Grid.Column="0" Spacing="16" MaxWidth="420">
+
+                <Border Padding="14" Classes="card">
+                    <StackPanel Spacing="10">
+                        <TextBlock Text="Zugangsdaten" FontWeight="SemiBold" />
+                        <TextBlock Text="Upload-URL" />
+                        <TextBox x:Name="ManualUploadUrlBox" Watermark="https://stylegallery.fotospiel.app/api/v1/photobooth/upload" />
+                        <TextBlock Text="Benutzername" />
+                        <TextBox x:Name="ManualUsernameBox" />
+                        <TextBlock Text="Passwort" />
+                        <TextBox x:Name="ManualPasswordBox" PasswordChar="•" />
+                        <TextBlock Text="Antwort-Format (optional)" />
+                        <ComboBox x:Name="ResponseFormatBox" SelectedIndex="0">
+                            <ComboBoxItem Content="Auto" />
+                            <ComboBoxItem Content="JSON" />
+                            <ComboBoxItem Content="XML" />
+                        </ComboBox>
+                        <StackPanel Orientation="Horizontal" Spacing="8">
+                            <Button x:Name="TestConnectionButton" Content="Verbindung testen" Click="TestConnectionButton_Click" Classes="secondary" />
+                            <Button x:Name="SaveAdvancedButton" Content="Speichern" Click="SaveAdvancedButton_Click" Classes="primary" />
+                        </StackPanel>
+                    </StackPanel>
+                </Border>
+
+                <Border Padding="14" Classes="card">
+                    <StackPanel Spacing="8">
+                        <TextBlock Text="Upload-Ordner" FontWeight="SemiBold" />
+                        <TextBlock x:Name="FolderText" Text="Noch nicht ausgewählt." TextWrapping="Wrap" Classes="subtitle" />
+                        <StackPanel Orientation="Horizontal" Spacing="8">
+                            <Button x:Name="DslrBoothPresetButton" Content="DSLrBooth" Click="DslrBoothPresetButton_Click" Classes="secondary" IsVisible="False" />
+                            <Button x:Name="SparkboothPresetButton" Content="Photobooth (Sparkbooth)" Click="SparkboothPresetButton_Click" Classes="secondary" IsVisible="False" />
+                        </StackPanel>
+                        <StackPanel Orientation="Horizontal" Spacing="8">
+                            <Button x:Name="PickFolderButton" Content="Ordner auswählen" Click="PickFolderButton_Click" Classes="primary" IsEnabled="False" />
+                            <Button x:Name="TestUploadButton" Content="Test-Upload senden" Click="TestUploadButton_Click" Classes="secondary" IsEnabled="False" />
+                        </StackPanel>
+                    </StackPanel>
+                </Border>
+
+                <Border Padding="14" Classes="card">
+                    <StackPanel Spacing="8">
+                        <TextBlock Text="Upload-Optionen" FontWeight="SemiBold" />
+                        <TextBlock Text="Max. parallele Uploads" />
+                        <TextBox x:Name="MaxUploadsBox" Watermark="2" />
+                        <TextBlock Text="Upload-Tempo" />
+                        <ComboBox x:Name="UploadTempoBox" SelectedIndex="1">
+                            <ComboBoxItem Content="Schnell (ohne Pause)" />
+                            <ComboBoxItem Content="Normal" />
+                            <ComboBoxItem Content="Sanft (schont Netzwerk)" />
+                        </ComboBox>
+                        <TextBlock Text="Nur diese Dateien (optional)" />
+                        <TextBox x:Name="IncludePatternsBox" Watermark="*.jpg;*.jpeg;*.png" />
+                        <TextBlock Text="Dateien ausschliessen (optional)" />
+                        <TextBox x:Name="ExcludePatternsBox" Watermark="*_preview*;*.tmp" />
+                        <TextBlock Text="Profile" />
+                        <ComboBox x:Name="ProfilesBox" />
+                        <StackPanel Orientation="Horizontal" Spacing="8">
+                            <Button x:Name="LoadProfileButton" Content="Profil laden" Click="LoadProfileButton_Click" Classes="secondary" />
+                            <Button x:Name="SaveProfileButton" Content="Profil speichern" Click="SaveProfileButton_Click" Classes="secondary" />
+                        </StackPanel>
+                    </StackPanel>
+                </Border>
+
+                <ToggleSwitch x:Name="QuietToggle" Content="Ruhiger Modus (nur Fehler anzeigen)" />
+            </StackPanel>
+
+            <StackPanel Grid.Column="2" Spacing="16" MaxWidth="380" Margin="0,6,0,0">
+            <Border Padding="14" Classes="card accent">
+                <StackPanel Spacing="6">
+                    <TextBlock Text="Status" FontWeight="SemiBold" />
+                    <TextBlock x:Name="StatusText" Text="Nicht verbunden." TextWrapping="Wrap" />
+                    <TextBlock x:Name="LastUploadText" Text="Letzter Upload: —" />
+                    <TextBlock x:Name="QueueStatusText" Text="Warteschlange: 0 · Läuft: 0 · Fehlgeschlagen: 0" />
+                    <TextBlock x:Name="LiveStatusText" Text="Live: —" />
+                </StackPanel>
+            </Border>
+
+            <Border Padding="14" Classes="card">
+                <StackPanel Spacing="6">
+                    <TextBlock Text="Details" FontWeight="SemiBold" />
+                    <TextBlock x:Name="EventNameText" Text="Benutzername: —" TextWrapping="Wrap" />
+                    <TextBlock x:Name="BaseUrlText" Text="Basis-URL: —" TextWrapping="Wrap" />
+                    <TextBlock x:Name="UploadUrlText" Text="Upload-URL: —" TextWrapping="Wrap" />
+                    <TextBlock x:Name="VersionText" Text="App-Version: —" />
+                    <TextBlock x:Name="ConnectExpiryText" Text="Antwort-Format: —" TextWrapping="Wrap" />
+                    <TextBlock x:Name="FolderHealthText" Text="Ordner: —" TextWrapping="Wrap" />
+                    <TextBlock x:Name="DiskFreeText" Text="Freier Speicher: —" TextWrapping="Wrap" />
+                    <TextBlock x:Name="LastSeenText" Text="Letzte Datei: —" TextWrapping="Wrap" />
+                    <TextBlock x:Name="LastErrorText" Text="Letzter Fehler: —" TextWrapping="Wrap" />
+                    <Button x:Name="LogCopyButton" Content="Log kopieren" Click="LogCopyButton_Click" Classes="secondary" />
+                </StackPanel>
+            </Border>
+
+            <Border Padding="14" Classes="card">
+                <StackPanel Spacing="8">
+                    <TextBlock Text="Letzte Uploads" FontWeight="SemiBold" />
+                    <ItemsControl x:Name="RecentUploadsList" ItemsSource="{Binding RecentUploads}">
+                        <ItemsControl.ItemTemplate>
+                            <DataTemplate>
+                                <Border Background="#14FFFFFF" Padding="10" CornerRadius="8" Margin="0,0,0,8">
+                                    <Grid ColumnDefinitions="*,Auto" RowDefinitions="Auto,Auto">
+                                        <TextBlock Grid.Column="0" Grid.Row="0" Text="{Binding FileName}" />
+                                        <TextBlock Grid.Column="1" Grid.Row="0" Text="{Binding StatusLabel}" />
+                                        <TextBlock Grid.Column="0" Grid.Row="1" Text="{Binding UpdatedLabel}" Opacity="0.7" FontSize="11" />
+                                    </Grid>
+                                </Border>
+                            </DataTemplate>
+                        </ItemsControl.ItemTemplate>
+                    </ItemsControl>
+                    <StackPanel Orientation="Horizontal" Spacing="8">
+                        <Button x:Name="RetryFailedButton" Content="Fehlgeschlagene erneut senden" Click="RetryFailedButton_Click" IsEnabled="False" Classes="secondary" />
+                        <Button x:Name="ClearFailedButton" Content="Fehlerliste leeren" Click="ClearFailedButton_Click" IsEnabled="False" Classes="secondary" />
+                    </StackPanel>
+                </StackPanel>
+            </Border>
+            </StackPanel>
+        </Grid>
+    </Grid>
+</Window>

PhotoboothUploader/Models/PhotoboothConnectResponse.cs

@@ -0,0 +1,33 @@
+using System.Text.Json.Serialization;
+
+namespace PhotoboothUploader.Models;
+
+public sealed class PhotoboothConnectResponse
+{
+    [JsonPropertyName("data")]
+    public PhotoboothConnectPayload? Data { get; set; }
+
+    [JsonPropertyName("message")]
+    public string? Message { get; set; }
+}
+
+public sealed class PhotoboothConnectPayload
+{
+    [JsonPropertyName("event_name")]
+    public string? EventName { get; set; }
+
+    [JsonPropertyName("upload_url")]
+    public string? UploadUrl { get; set; }
+
+    [JsonPropertyName("username")]
+    public string? Username { get; set; }
+
+    [JsonPropertyName("password")]
+    public string? Password { get; set; }
+
+    [JsonPropertyName("expires_at")]
+    public string? ExpiresAt { get; set; }
+
+    [JsonPropertyName("response_format")]
+    public string? ResponseFormat { get; set; }
+}

PhotoboothUploader/Models/PhotoboothProfile.cs

@@ -0,0 +1,26 @@
+using System;
+
+namespace PhotoboothUploader.Models;
+
+public sealed class PhotoboothProfile
+{
+    public string? Label { get; set; }
+    public string? EventName { get; set; }
+    public string? BaseUrl { get; set; }
+    public string? UploadUrl { get; set; }
+    public string? Username { get; set; }
+    public string? Password { get; set; }
+    public string? ResponseFormat { get; set; }
+    public string? WatchFolder { get; set; }
+    public string? IncludePatterns { get; set; }
+    public string? ExcludePatterns { get; set; }
+    public int MaxConcurrentUploads { get; set; } = 2;
+    public int UploadDelayMs { get; set; } = 500;
+
+    public string DisplayName
+        => !string.IsNullOrWhiteSpace(Label)
+            ? Label
+            : !string.IsNullOrWhiteSpace(EventName)
+                ? EventName
+                : UploadUrl ?? BaseUrl ?? "Profil";
+}

PhotoboothUploader/Models/PhotoboothSettings.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+
+namespace PhotoboothUploader.Models;
+
+public sealed class PhotoboothSettings
+{
+    public string? BaseUrl { get; set; }
+    public string? EventName { get; set; }
+    public string? UploadUrl { get; set; }
+    public string? Username { get; set; }
+    public string? Password { get; set; }
+    public string? ResponseFormat { get; set; }
+    public string? WatchFolder { get; set; }
+    public string? IncludePatterns { get; set; }
+    public string? ExcludePatterns { get; set; }
+    public List<string> PendingUploads { get; set; } = new();
+    public Dictionary<string, string> UploadedFiles { get; set; } = new(StringComparer.OrdinalIgnoreCase);
+    public List<PhotoboothProfile> Profiles { get; set; } = new();
+    public string? ConnectExpiresAt { get; set; }
+    public string? LastSeenFile { get; set; }
+    public string? LastSeenAt { get; set; }
+    public string? LastError { get; set; }
+    public string? LastErrorAt { get; set; }
+    public int MaxConcurrentUploads { get; set; } = 2;
+    public int UploadDelayMs { get; set; } = 500;
+    public double WindowWidth { get; set; }
+    public double WindowHeight { get; set; }
+}

PhotoboothUploader/Models/UploadItem.cs

@@ -0,0 +1,74 @@
+using System;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace PhotoboothUploader.Models;
+
+public enum UploadStatus
+{
+    Queued,
+    Uploading,
+    Success,
+    Failed,
+}
+
+public sealed class UploadItem : INotifyPropertyChanged
+{
+    private UploadStatus _status;
+    private DateTimeOffset _updatedAt;
+
+    public UploadItem(string path)
+    {
+        Path = path;
+        FileName = System.IO.Path.GetFileName(path);
+        UpdatedAt = DateTimeOffset.Now;
+        Status = UploadStatus.Queued;
+    }
+
+    public string Path { get; }
+
+    public string FileName { get; }
+
+    public UploadStatus Status
+    {
+        get => _status;
+        set
+        {
+            if (_status != value)
+            {
+                _status = value;
+                UpdatedAt = DateTimeOffset.Now;
+                OnPropertyChanged();
+                OnPropertyChanged(nameof(StatusLabel));
+            }
+        }
+    }
+
+    public DateTimeOffset UpdatedAt
+    {
+        get => _updatedAt;
+        private set
+        {
+            _updatedAt = value;
+            OnPropertyChanged();
+            OnPropertyChanged(nameof(UpdatedLabel));
+        }
+    }
+
+    public string StatusLabel => Status switch
+    {
+        UploadStatus.Uploading => "Upload läuft",
+        UploadStatus.Success => "Fertig",
+        UploadStatus.Failed => "Fehlgeschlagen",
+        _ => "Wartet",
+    };
+
+    public string UpdatedLabel => $"{UpdatedAt:HH:mm}";
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+
+    private void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+    {
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+    }
+}

PhotoboothUploader/PhotoboothUploader.csproj

@@ -0,0 +1,31 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <AssemblyName>AIStylegallery.PhotoboothUploader</AssemblyName>
+    <Product>AI Stylegallery Photobooth Uploader</Product>
+    <Company>AI Stylegallery</Company>
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+    <ApplicationIcon>Assets\app.ico</ApplicationIcon>
+    <AvaloniaUseCompiledBindingsByDefault>false</AvaloniaUseCompiledBindingsByDefault>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia" Version="11.3.10" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.3.10" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.10" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.10" />
+    <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
+    <PackageReference Include="Avalonia.Diagnostics" Version="11.3.10">
+      <IncludeAssets Condition="'$(Configuration)' != 'Debug'">None</IncludeAssets>
+      <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Include="Assets\app.ico" />
+    <AvaloniaResource Include="Assets\logo.png" />
+    <AvaloniaResource Include="Assets\sample-upload.png" />
+  </ItemGroup>
+</Project>

PhotoboothUploader/Program.cs

@@ -0,0 +1,21 @@
+using Avalonia;
+using System;
+
+namespace PhotoboothUploader;
+
+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()
+            .WithInterFont()
+            .LogToTrace();
+}

PhotoboothUploader/Services/PhotoboothConnectClient.cs

@@ -0,0 +1,122 @@
+using System;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Net.Http.Json;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+using PhotoboothUploader.Models;
+
+namespace PhotoboothUploader.Services;
+
+public sealed class PhotoboothConnectClient
+{
+    private const int MaxRetries = 2;
+    private static readonly TimeSpan DefaultTimeout = TimeSpan.FromSeconds(10);
+    private readonly HttpClient _httpClient;
+    private readonly JsonSerializerOptions _jsonOptions = new()
+    {
+        PropertyNameCaseInsensitive = true,
+    };
+
+    public PhotoboothConnectClient(string baseUrl, string userAgent)
+    {
+        _httpClient = new HttpClient
+        {
+            BaseAddress = new Uri(baseUrl),
+            Timeout = DefaultTimeout,
+        };
+
+        _httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
+        _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd(userAgent);
+    }
+
+    public async Task<PhotoboothConnectResponse> RedeemAsync(string code, CancellationToken cancellationToken = default)
+    {
+        var request = new { code };
+
+        for (var attempt = 0; attempt <= MaxRetries; attempt++)
+        {
+            try
+            {
+                using var response = await _httpClient.PostAsJsonAsync("/api/v1/photobooth/connect", request, cancellationToken);
+                var payload = await ReadPayloadAsync(response, cancellationToken);
+
+                if (response.IsSuccessStatusCode)
+                {
+                    return payload ?? Fail(response.ReasonPhrase ?? "Verbindung fehlgeschlagen.");
+                }
+
+                if (response.StatusCode is HttpStatusCode.UnprocessableEntity or HttpStatusCode.Conflict or HttpStatusCode.Unauthorized)
+                {
+                    return payload ?? Fail(response.ReasonPhrase ?? "Verbindung fehlgeschlagen.");
+                }
+
+                if (attempt < MaxRetries && IsTransientStatus(response.StatusCode))
+                {
+                    await Task.Delay(GetRetryDelay(attempt), cancellationToken);
+                    continue;
+                }
+
+                return payload ?? Fail(response.ReasonPhrase ?? "Verbindung fehlgeschlagen.");
+            }
+            catch (TaskCanceledException) when (!cancellationToken.IsCancellationRequested)
+            {
+                if (attempt < MaxRetries)
+                {
+                    await Task.Delay(GetRetryDelay(attempt), cancellationToken);
+                    continue;
+                }
+
+                return Fail("Zeitüberschreitung bei der Verbindung.");
+            }
+            catch (HttpRequestException)
+            {
+                if (attempt < MaxRetries)
+                {
+                    await Task.Delay(GetRetryDelay(attempt), cancellationToken);
+                    continue;
+                }
+
+                return Fail("Netzwerkfehler. Bitte Verbindung prüfen.");
+            }
+            catch (JsonException)
+            {
+                return Fail("Serverantwort konnte nicht gelesen werden.");
+            }
+        }
+
+        return Fail("Verbindung fehlgeschlagen.");
+    }
+
+    private async Task<PhotoboothConnectResponse?> ReadPayloadAsync(HttpResponseMessage response, CancellationToken cancellationToken)
+    {
+        if (response.Content.Headers.ContentLength == 0)
+        {
+            return null;
+        }
+
+        return await response.Content.ReadFromJsonAsync<PhotoboothConnectResponse>(_jsonOptions, cancellationToken);
+    }
+
+    private static bool IsTransientStatus(HttpStatusCode statusCode)
+    {
+        return statusCode is HttpStatusCode.RequestTimeout or HttpStatusCode.TooManyRequests
+            or HttpStatusCode.BadGateway or HttpStatusCode.ServiceUnavailable or HttpStatusCode.GatewayTimeout
+            or HttpStatusCode.InternalServerError;
+    }
+
+    private static TimeSpan GetRetryDelay(int attempt)
+    {
+        return TimeSpan.FromMilliseconds(500 * (attempt + 1));
+    }
+
+    private static PhotoboothConnectResponse Fail(string message)
+    {
+        return new PhotoboothConnectResponse
+        {
+            Message = message,
+        };
+    }
+}

PhotoboothUploader/Services/SettingsStore.cs

@@ -0,0 +1,47 @@
+using System;
+using System.IO;
+using System.Text.Json;
+using PhotoboothUploader.Models;
+
+namespace PhotoboothUploader.Services;
+
+public sealed class SettingsStore
+{
+    private readonly JsonSerializerOptions _options = new()
+    {
+        PropertyNameCaseInsensitive = true,
+        WriteIndented = true,
+    };
+
+    public string SettingsPath { get; }
+    public string LogPath { get; }
+
+    public SettingsStore()
+    {
+        var basePath = Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
+            "AIStylegallery",
+            "PhotoboothUploader");
+
+        Directory.CreateDirectory(basePath);
+        SettingsPath = Path.Combine(basePath, "settings.json");
+        LogPath = Path.Combine(basePath, "uploader.log");
+    }
+
+    public PhotoboothSettings Load()
+    {
+        if (!File.Exists(SettingsPath))
+        {
+            return new PhotoboothSettings();
+        }
+
+        var json = File.ReadAllText(SettingsPath);
+        return JsonSerializer.Deserialize<PhotoboothSettings>(json, _options) ?? new PhotoboothSettings();
+    }
+
+    public void Save(PhotoboothSettings settings)
+    {
+        var json = JsonSerializer.Serialize(settings, _options);
+        File.WriteAllText(SettingsPath, json);
+    }
+}

PhotoboothUploader/Services/UploadService.cs

@@ -0,0 +1,297 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.IO;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Threading;
+using System.Threading.Channels;
+using System.Threading.Tasks;
+using PhotoboothUploader.Models;
+
+namespace PhotoboothUploader.Services;
+
+public sealed class UploadService
+{
+    private static readonly TimeSpan DefaultTimeout = TimeSpan.FromSeconds(20);
+    private static readonly TimeSpan RetryBaseDelay = TimeSpan.FromSeconds(2);
+    private const int MaxRetries = 2;
+    private readonly Channel<string> _queue = Channel.CreateUnbounded<string>();
+    private readonly ConcurrentDictionary<string, byte> _pending = new(StringComparer.OrdinalIgnoreCase);
+    private string _userAgent = "AIStylegalleryPhotoboothUploader";
+    private CancellationTokenSource? _cts;
+    private readonly List<Task> _workers = new();
+
+    public void Configure(string userAgent)
+    {
+        if (!string.IsNullOrWhiteSpace(userAgent))
+        {
+            _userAgent = userAgent;
+        }
+    }
+
+    public void Start(
+        PhotoboothSettings settings,
+        Action<string> onQueued,
+        Action<string> onUploading,
+        Action<string> onSuccess,
+        Action<string, string> onFailure)
+    {
+        Stop();
+
+        _cts = new CancellationTokenSource();
+        var workerCount = GetWorkerCount(settings);
+        for (var i = 0; i < workerCount; i++)
+        {
+            _workers.Add(Task.Run(() => WorkerAsync(settings, onQueued, onUploading, onSuccess, onFailure, _cts.Token)));
+        }
+    }
+
+    public void Stop()
+    {
+        _cts?.Cancel();
+        _cts = null;
+        _pending.Clear();
+        _workers.Clear();
+    }
+
+    public void Enqueue(string path, Action<string> onQueued)
+    {
+        if (!_pending.TryAdd(path, 0))
+        {
+            return;
+        }
+
+        _queue.Writer.TryWrite(path);
+        onQueued(path);
+    }
+
+    private async Task WorkerAsync(
+        PhotoboothSettings settings,
+        Action<string> onQueued,
+        Action<string> onUploading,
+        Action<string> onSuccess,
+        Action<string, string> onFailure,
+        CancellationToken token)
+    {
+        if (string.IsNullOrWhiteSpace(settings.UploadUrl))
+        {
+            return;
+        }
+
+        using var client = new HttpClient();
+        client.Timeout = DefaultTimeout;
+        client.DefaultRequestHeaders.UserAgent.ParseAdd(_userAgent);
+        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
+
+        while (await _queue.Reader.WaitToReadAsync(token))
+        {
+            while (_queue.Reader.TryRead(out var path))
+            {
+                try
+                {
+                    onUploading(path);
+                    var error = await UploadWithRetryAsync(client, settings, path, token);
+                    if (error is null)
+                    {
+                        onSuccess(path);
+                    }
+                    else
+                    {
+                        onFailure(path, error);
+                    }
+                }
+                catch (OperationCanceledException)
+                {
+                    return;
+                }
+                finally
+                {
+                    _pending.TryRemove(path, out _);
+                    if (settings.UploadDelayMs > 0)
+                    {
+                        await Task.Delay(settings.UploadDelayMs, token);
+                    }
+                }
+            }
+        }
+    }
+
+    private static async Task<string?> UploadWithRetryAsync(
+        HttpClient client,
+        PhotoboothSettings settings,
+        string path,
+        CancellationToken token)
+    {
+        for (var attempt = 0; attempt <= MaxRetries; attempt++)
+        {
+            var attemptError = await UploadOnceAsync(client, settings, path, token);
+            if (attemptError.Success)
+            {
+                return null;
+            }
+
+            if (!attemptError.Retryable || attempt >= MaxRetries)
+            {
+                return attemptError.Error ?? "Upload fehlgeschlagen.";
+            }
+
+            await Task.Delay(GetRetryDelay(attempt), token);
+        }
+
+        return "Upload fehlgeschlagen.";
+    }
+
+    private static async Task<UploadAttempt> UploadOnceAsync(
+        HttpClient client,
+        PhotoboothSettings settings,
+        string path,
+        CancellationToken token)
+    {
+        var readyError = await WaitForFileReadyAsync(path, token);
+        if (readyError is not null)
+        {
+            return UploadAttempt.Fail(readyError, retryable: false);
+        }
+
+        if (!File.Exists(path))
+        {
+            return UploadAttempt.Fail("Datei nicht gefunden.", retryable: false);
+        }
+
+        using var content = new MultipartFormDataContent();
+
+        if (!string.IsNullOrWhiteSpace(settings.Username))
+        {
+            content.Add(new StringContent(settings.Username), "username");
+        }
+
+        if (!string.IsNullOrWhiteSpace(settings.Password))
+        {
+            content.Add(new StringContent(settings.Password), "password");
+        }
+
+        if (!string.IsNullOrWhiteSpace(settings.ResponseFormat))
+        {
+            content.Add(new StringContent(settings.ResponseFormat), "response_format");
+        }
+
+        var stream = File.OpenRead(path);
+        var fileContent = new StreamContent(stream);
+        fileContent.Headers.ContentType = new MediaTypeHeaderValue(ResolveContentType(path));
+        content.Add(fileContent, "media", Path.GetFileName(path));
+
+        try
+        {
+            var response = await client.PostAsync(settings.UploadUrl, content, token);
+
+            if (response.IsSuccessStatusCode)
+            {
+                return UploadAttempt.Ok();
+            }
+
+            var body = await ReadResponseBodyAsync(response, token);
+            var status = $"{(int)response.StatusCode} {response.ReasonPhrase}".Trim();
+            var message = string.IsNullOrWhiteSpace(body) ? status : $"{status} – {body}";
+            return UploadAttempt.Fail(message, IsRetryableStatus(response.StatusCode));
+        }
+        catch (TaskCanceledException) when (!token.IsCancellationRequested)
+        {
+            return UploadAttempt.Fail("Zeitüberschreitung beim Upload.", retryable: true);
+        }
+        catch (HttpRequestException)
+        {
+            return UploadAttempt.Fail("Netzwerkfehler beim Upload.", retryable: true);
+        }
+        catch (IOException)
+        {
+            return UploadAttempt.Fail("Datei konnte nicht gelesen werden.", retryable: false);
+        }
+    }
+
+    private static async Task<string?> WaitForFileReadyAsync(string path, CancellationToken token)
+    {
+        var lastSize = -1L;
+
+        for (var attempts = 0; attempts < 10; attempts++)
+        {
+            token.ThrowIfCancellationRequested();
+
+            if (!File.Exists(path))
+            {
+                await Task.Delay(500, token);
+                continue;
+            }
+
+            var info = new FileInfo(path);
+            var size = info.Length;
+
+            if (size > 0 && size == lastSize)
+            {
+                return null;
+            }
+
+            lastSize = size;
+            await Task.Delay(700, token);
+        }
+
+        return "Datei ist noch in Bearbeitung.";
+    }
+
+    private static string ResolveContentType(string path)
+    {
+        return Path.GetExtension(path)?.ToLowerInvariant() switch
+        {
+            ".png" => "image/png",
+            ".webp" => "image/webp",
+            _ => "image/jpeg",
+        };
+    }
+
+    private static bool IsRetryableStatus(System.Net.HttpStatusCode statusCode)
+    {
+        var numeric = (int)statusCode;
+        return numeric >= 500 || statusCode is System.Net.HttpStatusCode.RequestTimeout or System.Net.HttpStatusCode.TooManyRequests;
+    }
+
+    private static TimeSpan GetRetryDelay(int attempt)
+    {
+        var jitter = TimeSpan.FromMilliseconds(Random.Shared.Next(100, 350));
+        return TimeSpan.FromMilliseconds(RetryBaseDelay.TotalMilliseconds * Math.Pow(2, attempt)) + jitter;
+    }
+
+    private static async Task<string?> ReadResponseBodyAsync(HttpResponseMessage response, CancellationToken token)
+    {
+        if (response.Content is null)
+        {
+            return null;
+        }
+
+        var body = await response.Content.ReadAsStringAsync(token);
+        if (string.IsNullOrWhiteSpace(body))
+        {
+            return null;
+        }
+
+        body = body.Trim();
+        return body.Length > 200 ? body[..200] + "…" : body;
+    }
+
+    private static int GetWorkerCount(PhotoboothSettings settings)
+    {
+        var count = settings.MaxConcurrentUploads;
+        if (count < 1)
+        {
+            return 1;
+        }
+
+        return count > 5 ? 5 : count;
+    }
+
+    private readonly record struct UploadAttempt(bool Success, bool Retryable, string? Error)
+    {
+        public static UploadAttempt Ok() => new(true, false, null);
+
+        public static UploadAttempt Fail(string error, bool retryable) => new(false, retryable, error);
+    }
+}

PhotoboothUploader/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="AIStylegallery.PhotoboothUploader"/>
+
+  <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>