Moved culture initialization from App.razor to Program.cs to ensure culture settings are applied before the app starts. Removed CultureService injection and OnInitializedAsync method from App.razor. Updated LanguageSelector.razor to change language without page reload, enhancing user experience. Added System.Globalization to Program.cs for culture support.
Added dependency injection for `CultureService` in `App.razor` to dynamically initialize culture settings during the component's lifecycle.
Included `System.Globalization` and `EnvelopeGenerator.ReceiverUI.Services` namespaces to support culture-related functionality.
Injected `CultureService` and added an `OnInitializedAsync` method to set `CultureInfo.DefaultThreadCurrentCulture` and `CultureInfo.DefaultThreadCurrentUICulture` based on the service's initialization.
Reformatted surrounding `<Router>` code for clarity.
