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

Wino.Mail.WinUI/Controls/SyncAnimationControl.xaml.cs

@@ -0,0 +1,54 @@
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+
+namespace Wino.Mail.WinUI.Controls;
+
+public sealed partial class SyncAnimationControl : UserControl
+{
+    public static readonly DependencyProperty IsPlayingProperty = DependencyProperty.Register(
+        nameof(IsPlaying),
+        typeof(bool),
+        typeof(SyncAnimationControl),
+        new PropertyMetadata(true, OnIsPlayingChanged));
+
+    public bool IsPlaying
+    {
+        get => (bool)GetValue(IsPlayingProperty);
+        set => SetValue(IsPlayingProperty, value);
+    }
+
+    public SyncAnimationControl()
+    {
+        InitializeComponent();
+        Loaded += OnLoaded;
+    }
+
+    private void OnLoaded(object sender, RoutedEventArgs e)
+    {
+        if (IsPlaying)
+        {
+            PlayAnimation();
+        }
+    }
+
+    private static void OnIsPlayingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        var control = (SyncAnimationControl)d;
+
+        if ((bool)e.NewValue)
+        {
+            control.PlayAnimation();
+        }
+        else
+        {
+            control.AnimationPlayer.Stop();
+        }
+    }
+
+    private void PlayAnimation()
+    {
+#pragma warning disable CS4014 // Fire-and-forget is intentional for looped animation playback.
+        AnimationPlayer.PlayAsync(0, 1, looped: true);
+#pragma warning restore CS4014
+    }
+}