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

Jugenddienst Stunden/Infrastructure/AppSettings.cs

@@ -0,0 +1,41 @@
+using Jugenddienst_Stunden.Interfaces;
+using Jugenddienst_Stunden.Types;
+
+namespace Jugenddienst_Stunden.Infrastructure;
+
+/// <summary>
+/// Represents the application settings and provides access to user preferences
+/// such as API URL, API key, employee ID, and personal details.
+/// </summary>
+/// <remarks>
+/// The <c>AppSettings</c> class implements the <c>IAppSettings</c> interface and manages
+/// persistent configuration settings needed for the application.
+/// These settings include preferences like API configuration and user identification details.
+/// </remarks>
+internal sealed class AppSettings : IAppSettings {
+	public string ApiUrl {
+		get => Preferences.Default.Get("apiUrl", "");
+		set => Preferences.Default.Set("apiUrl", value);
+	}
+
+	public string ApiKey {
+		get => Preferences.Default.Get("apiKey", "");
+		set => Preferences.Default.Set("apiKey", value);
+	}
+
+	public int EmployeeId {
+		get => Preferences.Default.Get("EmployeeId", 0);
+		set => Preferences.Default.Set("EmployeeId", value);
+	}
+
+	public string Name {
+		get => Preferences.Default.Get("name", "Nicht");
+		set => Preferences.Default.Set("name", value);
+	}
+
+	public string Surname {
+		get => Preferences.Default.Get("surname", "Eingeloggt");
+		set => Preferences.Default.Set("surname", value);
+	}
+	public Settings? Settings { get; set; }
+}