添加设置页面及多语言支持功能

在 `MainWindow.xaml` 中添加了设置页面的 TabItem，并引入了 `BooleanToVisibilityConverter` 以控制多语言按钮的可见性。
在 `MainWindowViewModel.cs` 中新增 `_multipleLangSupport` 属性，并在加载任务时更新其值。
创建了新的 `SettingsPage.xaml` 页面，包含基本的 UI 元素。
在 `SettingsPage.xaml.cs` 中实现了页面的构造函数，确保组件正确初始化。

MainWindow.xaml

@@ -5,6 +5,7 @@
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:local="clr-namespace:MCI18n"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:page="clr-namespace:MCI18n.Pages"
     Title="SNBT编辑器"
     Width="900"
     Height="600"
@@ -12,6 +13,9 @@
     Foreground="White"
     mc:Ignorable="d">
 
+    <Window.Resources>
+        <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
+    </Window.Resources>
     <Window.DataContext>
         <local:MainWindowViewModel />
     </Window.DataContext>
@@ -49,8 +53,11 @@
                 Command="{Binding SaveQuestCommand}"
                 Content="打包"
                 IsEnabled="False" />
-            <StackPanel Visibility="{}">
-                
+            <StackPanel Visibility="{Binding MultipleLangSupport, Converter={StaticResource BooleanToVisibilityConverter}}">
+                <Button
+                    Width="100"
+                    Height="30"
+                    Content="多语言" />
             </StackPanel>
         </StackPanel>
         <TabControl Grid.Row="1">
@@ -127,6 +134,9 @@
                 </Grid>
             </TabItem>
             <TabItem Header="战利品列表" />
+            <TabItem Header="设置">
+                <Frame Source="Pages/SettingsPage.xaml" />
+            </TabItem>
         </TabControl>
         <!-- 状态栏
         <StatusBar Grid.Row="2" Background="Transparent">

MainWindowViewModel.cs

@@ -36,6 +36,8 @@ namespace MCI18n
         [ObservableProperty]
         private bool _loading = false;
          
+        [ObservableProperty]
+        private bool _multipleLangSupport;
 
         [RelayCommand]
         private void LoadQuests()
@@ -61,6 +63,7 @@ namespace MCI18n
                             Chapters.Add(chapter); 
                         }
                     }
+                    MultipleLangSupport = GlobalContext.MultipleLangSupport;
                 }
                 catch (Exception ex)
                 {

Pages/SettingsPage.xaml

@@ -0,0 +1,16 @@
+<Page
+    x:Class="MCI18n.Pages.SettingsPage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:local="clr-namespace:MCI18n.Pages"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    Title="SettingsPage"
+    d:DesignHeight="450"
+    d:DesignWidth="800"
+    mc:Ignorable="d">
+
+    <Grid>
+        <TextBlock Text="Settings..." />
+    </Grid>
+</Page>

Pages/SettingsPage.xaml.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace MCI18n.Pages
+{
+    /// <summary>
+    /// SettingsPage.xaml 的交互逻辑
+    /// </summary>
+    public partial class SettingsPage : Page
+    {
+        public SettingsPage()
+        {
+            InitializeComponent();
+        }
+    }
+}