fix(about): copyright carries the year — © 2026 Llama Chile Shop

Derived from the clock rather than a literal, so a build shipped next year does not display a stale
date. The About test asserts the rendered string, year included.

Controls/OverlayHost.xaml

@@ -156,7 +156,7 @@
                                             Style="{StaticResource YtButtonSecondary}" FontSize="11" Padding="10,5"/>
                                 </StackPanel>
 
-                                <TextBlock x:Name="AboutCopyright" Text="© Llama Chile Shop"
+                                <TextBlock x:Name="AboutCopyright" Text="{Binding CopyrightLabel}"
                                            Foreground="{StaticResource Brush.OnSurfaceVariant}" FontSize="11"
                                            HorizontalAlignment="Center" Margin="0,18,0,4"/>
                             </StackPanel>

ViewModels/MainViewModel.Overlays.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Diagnostics;
 using System.IO;
 using System.Windows.Input;
@@ -46,6 +47,10 @@ public partial class MainViewModel : ViewModelBase
     public string PaidOfferText => "Unlocks 60 fps for streaming and recording.";
     public string TrustLine => "One-time purchase · lifetime licence · no account, no subscription, no tracking.";
 
+    /// <summary>Footer copyright. The year is the current one, not a hardcoded literal, so a build
+    /// shipped next year does not carry a stale date.</summary>
+    public string CopyrightLabel => $"© {DateTime.Now.Year} Llama Chile Shop";
+
     /// <summary>Shown instead of the price and CTA once ownership is verified: a paying customer is
     /// never sold to.</summary>
     public string LicenceStateLabel => IsAppOwned ? "Licence: owned via Steam — thank you." : string.Empty;

ytLive.Tests/AboutHubTests.cs

@@ -117,7 +117,7 @@ public sealed class AboutHubTests
                 Assert.Equal(Visibility.Visible, upgradeBlock!.Visibility);
 
                 var copyright = FindVisualChildByName<TextBlock>(window, "AboutCopyright");
-                Assert.Equal("© Llama Chile Shop", copyright!.Text);
+                Assert.Equal($"© {DateTime.Now.Year} Llama Chile Shop", copyright!.Text);
                 Assert.DoesNotContain("Made by gramps", TextOf(window));
 
                 // A paying customer is never sold to.