New UI

WinterspringLauncher/App.axaml

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+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="WinterspringLauncher.App"
+             RequestedThemeVariant="Dark">
+    <Application.Styles>
+        <SimpleTheme />
+        <!--<FluentTheme />-->
+    </Application.Styles>
+    <Application.Resources>
+        <FontFamily x:Key="MonoFont">avares://WinterspringLauncher/Assets/fonts/RobotoMono-Regular.ttf#</FontFamily>
+        <!--<FontFamily x:Key="MonoFont">Assets\\fonts\\RobotoMono-Regular.ttf</FontFamily>-->
+        <SolidColorBrush x:Key="TerminalBackground">#111111</SolidColorBrush>
+    </Application.Resources>
+</Application>

WinterspringLauncher/App.axaml.cs

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+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+using WinterspringLauncher.ViewModels;
+using WinterspringLauncher.Views;
+
+namespace WinterspringLauncher;
+
+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 MainWindowViewModel() // <-- Will also initialize LauncherLogic
+            };
+        }
+
+        base.OnFrameworkInitializationCompleted();
+    }
+}

WinterspringLauncher/Assets/Resources.axaml

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+<ResourceDictionary xmlns="https://github.com/avaloniaui"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+</ResourceDictionary>

WinterspringLauncher/Assets/icons/language-icons/source.txt

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+https://www.flaticon.com/packs/countrys-flags

WinterspringLauncher/Assets/translations/en.json

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+{
+    "start_game": "Start Game"
+}