Import functionality for wino accounts, calendar sync UI, bunch of shell improvements

Wino.Core.Domain/Models/Accounts/WinoAccountSyncExportResult.cs

@@ -0,0 +1,8 @@
+namespace Wino.Core.Domain.Models.Accounts;
+
+public sealed class WinoAccountSyncExportResult
+{
+    public bool IncludedPreferences { get; init; }
+    public bool IncludedAccounts { get; init; }
+    public int ExportedMailboxCount { get; init; }
+}

Wino.Core.Domain/Models/Accounts/WinoAccountSyncImportResult.cs

@@ -0,0 +1,15 @@
+namespace Wino.Core.Domain.Models.Accounts;
+
+public sealed class WinoAccountSyncImportResult
+{
+    public bool IncludedPreferences { get; init; }
+    public bool IncludedAccounts { get; init; }
+    public bool HadRemotePreferences { get; init; }
+    public int AppliedPreferenceCount { get; init; }
+    public int FailedPreferenceCount { get; init; }
+    public int ImportedMailboxCount { get; init; }
+    public int SkippedDuplicateMailboxCount { get; init; }
+    public int RemoteMailboxCount { get; init; }
+
+    public bool HasAnyRemoteData => HadRemotePreferences || RemoteMailboxCount > 0;
+}

Wino.Core.Domain/Models/Accounts/WinoAccountSyncSelection.cs

@@ -0,0 +1,5 @@
+namespace Wino.Core.Domain.Models.Accounts;
+
+public sealed record WinoAccountSyncSelection(
+    bool IncludePreferences = true,
+    bool IncludeAccounts = true);

Wino.Core.Domain/Models/Navigation/ShellModeActivationContext.cs

@@ -1,7 +1,10 @@
+#nullable enable
+
 namespace Wino.Core.Domain.Models.Navigation;
 
 public sealed class ShellModeActivationContext
 {
     public bool IsInitialActivation { get; init; }
-    public object Parameter { get; init; }
+    public bool SuppressStartupFlows { get; init; }
+    public object? Parameter { get; init; }
 }