Initial integration.

Wino.Core.Domain/Interfaces/ISynchronizationManager.cs

@@ -64,6 +64,12 @@ public interface ISynchronizationManager
     Task<MailSynchronizationResult> SynchronizeProfileAsync(Guid accountId,
                                                             CancellationToken cancellationToken = default);
 
+    /// <summary>
+    /// Handles calendar synchronization for the given account.
+    /// </summary>
+    Task<CalendarSynchronizationResult> SynchronizeCalendarAsync(CalendarSynchronizationOptions options,
+                                                                  CancellationToken cancellationToken = default);
+
     /// <summary>
     /// Downloads a MIME message for the given mail item.
     /// </summary>

Wino.Core.Domain/Interfaces/IWinoNavigationService.cs

@@ -8,9 +8,10 @@ public interface INavigationService
 {
     bool Navigate(WinoPage page,
                          object parameter = null,
-                         NavigationReferenceFrame frame = NavigationReferenceFrame.ShellFrame,
+                         NavigationReferenceFrame frame = NavigationReferenceFrame.InnerShellFrame,
                          NavigationTransitionType transition = NavigationTransitionType.None);
 
     Type GetPageType(WinoPage winoPage);
     void GoBack();
+    bool ChangeApplicationMode(WinoApplicationMode mode);
 }