feat: implement core domain models, authentication service, and UI components for the attendance system

Asistencia/ViewModels/LoginViewModel.cs

@@ -0,0 +1,53 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Asistencia.Services;
+
+namespace Asistencia.ViewModels;
+
+public partial class LoginViewModel : ObservableObject
+{
+    private readonly AuthService _authService;
+    private readonly MainWindowViewModel _mainVm;
+
+    [ObservableProperty]
+    private string _rut = string.Empty;
+
+    [ObservableProperty]
+    private string _password = string.Empty;
+
+    [ObservableProperty]
+    private string _errorMessage = string.Empty;
+
+    [ObservableProperty]
+    private bool _hasError;
+
+    [ObservableProperty]
+    private bool _isLoading;
+
+    public LoginViewModel(AuthService authService, MainWindowViewModel mainVm)
+    {
+        _authService = authService;
+        _mainVm = mainVm;
+    }
+
+    [RelayCommand]
+    private async Task LoginAsync()
+    {
+        IsLoading = true;
+        HasError = false;
+
+        var (success, message) = await _authService.LoginAsync(Rut, Password);
+
+        if (success)
+        {
+            _mainVm.NavigateToDashboard();
+        }
+        else
+        {
+            ErrorMessage = message;
+            HasError = true;
+        }
+
+        IsLoading = false;
+    }
+}