Refactor: Remove GlobalVar and replace with IAppSettings; restructure affected infrastructure, services, and view models for dependency injection.

Jugenddienst Stunden/Repositories/HoursRepository.cs

@@ -62,7 +62,7 @@ internal class HoursRepository : IHoursRepository {
 	}
 
 	public Task DeleteEntry(DayTime stunde)
-		=> _api.DeleteAsync($"/entry/{stunde.Id}");
+		=> _api.DeleteAsync($"entry/{stunde.Id}");
 
 	private static Dictionary<string, string?> QueryToDictionary(string query) {
 		var dict = new Dictionary<string, string?>();