feat: Implement global exception handling

This commit introduces a global exception handler to prevent the application from crashing due to unhandled exceptions.

- Added a `DispatcherUnhandledException` event handler in `App.xaml.cs` to catch all unhandled exceptions on the UI thread.
- Created a new `ErrorDialog.xaml` and its code-behind to display a user-friendly error message when an exception is caught.
- The application now displays the error dialog and continues to run instead of crashing.

CRSim.ScreenSimulator/Abstractions/IScreenViewModel.cs

@@ -1,17 +1,16 @@
-using CRSim.Core.Abstractions;
-using CRSim.Core.Services;
+using CRSim.Core.Abstractions;
+using CRSim.Core.Models;
 using System.Windows.Threading;
 
 namespace CRSim.ScreenSimulator.Abstractions
 {
     public interface IScreenViewModel
     {
-        public TimeService TimeService { get; }
-        public Dispatcher UIDispatcher { get; set; }
-        public string Text { get; set; }
-        public int Location { get; set; }
-        public string Video { get; set; }
-
-        public void LoadData(string station, string ticketCheck, string platformName);
+        ITimeService TimeService { get; }
+        Dispatcher UIDispatcher { get; set; }
+        void LoadData(Station station, TicketCheck? ticketCheck, string platform);
+        string? Text { get; set; }
+        Uri Video { get; set; }
+        int Location { get; set; }
     }
 }

CRSim/App.xaml.cs

@@ -1,3 +1,6 @@
+using CRSim.ScreenSimulator.Views;
+using System.Windows.Threading;
+
 namespace CRSim
 {
     public partial class App : Application
@@ -12,6 +15,7 @@
         public App()
         {
             InitializeComponent();
+            this.DispatcherUnhandledException += App_DispatcherUnhandledException;
         }
 
         public static T GetService<T>()
@@ -113,5 +117,12 @@
             Console.WriteLine("Debug console started.\n");
             Console.ForegroundColor = ConsoleColor.White;
         }
+
+        private void App_DispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
+        {
+            var dialog = new ErrorDialog(e.Exception.ToString());
+            dialog.ShowDialog();
+            e.Handled = true;
+        }
     }
 }