Add dynamic language switching support and UI refresh mechanism.

- Implemented dynamic resource reloading for language changes using CultureInfo.
- Added `ChangeLanguage` method in `ConfigViewModel` to update resource culture.
- Enhanced `MainViewModel` to propagate language updates and refresh the UI.
- Updated XAML bindings to use dynamic resource paths for localization.
- Ensured language settings (Polish and English) are applied immediately upon selection.
- Integrated `RefreshUI` to invalidate visuals and redraw the UI after language changes.
- Refined `ConfigWindow` to include language selection dropdown in settings.
- Verified resource files (`Resources.resx` and `Resources.pl.resx`) for consistency.

ChatAAC/App.axaml.cs

@@ -6,6 +6,7 @@
 using ChatAAC.ViewModels;
 using ChatAAC.Views;
 using ReactiveUI;
+using System.Globalization;
 
 namespace ChatAAC;
 
@@ -20,6 +21,9 @@ public override void Initialize()
 
     public override void OnFrameworkInitializationCompleted()
     {
+        // Ustawienie kultury na aktualną kulturę systemową
+        Lang.Resources.Culture = CultureInfo.CurrentCulture;
+
         if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
             desktop.MainWindow = new MainWindow
             {

ChatAAC/ChatAAC.csproj

@@ -45,4 +45,19 @@
     <ItemGroup>
         <Folder Include="Assets\Categories\"/>
     </ItemGroup>
+
+    <ItemGroup>
+      <EmbeddedResource Update="Lang\Resources.resx">
+        <Generator>PublicResXFileCodeGenerator</Generator>
+        <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      </EmbeddedResource>
+    </ItemGroup>
+
+    <ItemGroup>
+      <Compile Update="Lang\Resources.Designer.cs">
+        <DesignTime>True</DesignTime>
+        <AutoGen>True</AutoGen>
+        <DependentUpon>Resources.resx</DependentUpon>
+      </Compile>
+    </ItemGroup>
 </Project>