Refactor i18n to be self-initializing via DI

- Internationalization.Initialize() called in constructor when DI creates it
- Remove InitializeInternationalization() method from App.axaml.cs
- Update AvaloniaPublicAPI and LocalizeExtension to use Ioc.Default.GetService
- Reorder ConfigureDI before i18n initialization

Flow.Launcher.Avalonia/App.axaml.cs

@@ -23,14 +23,8 @@ public partial class App : Application
     private static readonly string ClassName = nameof(App);
     private Settings? _settings;
     private MainViewModel? _mainVM;
-    private Internationalization? _i18n;
 
     public static IPublicAPI? API { get; private set; }
-    
-    /// <summary>
-    /// Gets the internationalization service for translations.
-    /// </summary>
-    public static Internationalization? I18n { get; private set; }
 
     public override void Initialize() => AvaloniaXamlLoader.Load(this);
 
@@ -39,7 +33,6 @@ public partial class App : Application
         if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
         {
             LoadSettings();
-            InitializeInternationalization();
             ConfigureDI();
 
             API = Ioc.Default.GetRequiredService<IPublicAPI>();
@@ -77,31 +70,18 @@ public partial class App : Application
         }
     }
 
-    private void InitializeInternationalization()
-    {
-        try
-        {
-            _i18n = new Internationalization(_settings!);
-            _i18n.Initialize();
-            I18n = _i18n;
-            Log.Info(ClassName, "Internationalization initialized");
-        }
-        catch (Exception e)
-        {
-            Log.Exception(ClassName, "Failed to initialize internationalization", e);
-        }
-    }
-
     private void ConfigureDI()
     {
         var services = new ServiceCollection();
         services.AddSingleton(_settings!);
         services.AddSingleton<IAlphabet, PinyinAlphabet>();
         services.AddSingleton<StringMatcher>();
+        services.AddSingleton<Internationalization>();
         services.AddSingleton<MainViewModel>();
         services.AddSingleton<IPublicAPI>(sp => new AvaloniaPublicAPI(
             sp.GetRequiredService<Settings>(),
-            () => sp.GetRequiredService<MainViewModel>()));
+            () => sp.GetRequiredService<MainViewModel>(),
+            sp.GetRequiredService<Internationalization>()));
         Ioc.Default.ConfigureServices(services.BuildServiceProvider());
     }
 

Flow.Launcher.Avalonia/AvaloniaPublicAPI.cs

@@ -25,11 +25,13 @@ public class AvaloniaPublicAPI : IPublicAPI
 {
     private readonly Settings _settings;
     private readonly Func<MainViewModel> _getMainViewModel;
+    private readonly Internationalization _i18n;
 
-    public AvaloniaPublicAPI(Settings settings, Func<MainViewModel> getMainViewModel)
+    public AvaloniaPublicAPI(Settings settings, Func<MainViewModel> getMainViewModel, Internationalization i18n)
     {
         _settings = settings;
         _getMainViewModel = getMainViewModel;
+        _i18n = i18n;
     }
 
 #pragma warning disable CS0067
@@ -40,14 +42,7 @@ public class AvaloniaPublicAPI : IPublicAPI
     // Essential for plugins
     public void ChangeQuery(string query, bool requery = false) => _getMainViewModel().QueryText = query;
     
-    public string GetTranslation(string key)
-    {
-        var i18n = App.I18n;
-        if (i18n == null)
-            return key;
-        
-        return i18n.GetTranslation(key);
-    }
+    public string GetTranslation(string key) => _i18n.GetTranslation(key);
     
     public List<PluginPair> GetAllPlugins() => PluginManager.AllPlugins;
     public MatchResult FuzzySearch(string query, string stringToCompare) => 

Flow.Launcher.Avalonia/Resource/Internationalization.cs

@@ -34,6 +34,7 @@ public class Internationalization
     public Internationalization(Settings settings)
     {
         _settings = settings;
+        Initialize();
     }
 
     /// <summary>

Flow.Launcher.Avalonia/Resource/LocalizeExtension.cs

@@ -1,6 +1,7 @@
 using Avalonia.Data;
 using Avalonia.Markup.Xaml;
 using Avalonia.Markup.Xaml.MarkupExtensions;
+using CommunityToolkit.Mvvm.DependencyInjection;
 using System;
 
 namespace Flow.Launcher.Avalonia.Resource;
@@ -37,7 +38,7 @@ public class LocalizeExtension : MarkupExtension
             return Fallback ?? "[No Key]";
         }
 
-        var i18n = App.I18n;
+        var i18n = Ioc.Default.GetService<Internationalization>();
         if (i18n == null)
         {
             return Fallback ?? $"[{Key}]";
@@ -64,7 +65,7 @@ public static class Translator
     /// <returns>The translated string or the key in brackets if not found</returns>
     public static string GetString(string key)
     {
-        var i18n = App.I18n;
+        var i18n = Ioc.Default.GetService<Internationalization>();
         if (i18n == null)
         {
             return $"[{key}]";