0.1.2

LanMontainDesktop/Views/Components/ClockWidget.axaml

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+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             d:DesignWidth="220"
+             d:DesignHeight="70"
+             x:Class="LanMontainDesktop.Views.Components.ClockWidget">
+
+    <Border Padding="8"
+            CornerRadius="8"
+            BorderBrush="#80A5B4FC"
+            BorderThickness="1"
+            Background="#CC0F172A">
+        <TextBlock x:Name="TimeTextBlock"
+                   HorizontalAlignment="Center"
+                   VerticalAlignment="Center"
+                   FontSize="26"
+                   FontWeight="SemiBold"
+                   Foreground="White" />
+    </Border>
+
+</UserControl>

LanMontainDesktop/Views/Components/ClockWidget.axaml.cs

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+using System;
+using System.Globalization;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Threading;
+
+namespace LanMontainDesktop.Views.Components;
+
+public partial class ClockWidget : UserControl
+{
+    private readonly DispatcherTimer _timer = new()
+    {
+        Interval = TimeSpan.FromSeconds(1)
+    };
+
+    public ClockWidget()
+    {
+        InitializeComponent();
+
+        _timer.Tick += OnTimerTick;
+        AttachedToVisualTree += OnAttachedToVisualTree;
+        DetachedFromVisualTree += OnDetachedFromVisualTree;
+        UpdateClock();
+    }
+
+    private void OnAttachedToVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
+    {
+        UpdateClock();
+        _timer.Start();
+    }
+
+    private void OnDetachedFromVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
+    {
+        _timer.Stop();
+    }
+
+    private void OnTimerTick(object? sender, EventArgs e)
+    {
+        UpdateClock();
+    }
+
+    private void UpdateClock()
+    {
+        var now = DateTime.Now;
+        TimeTextBlock.Text = now.ToString("HH:mm:ss", CultureInfo.CurrentCulture);
+    }
+}