重构任务节点对话框和JS脚本选择窗口，调整命名空间，优化代码结构

BetterGenshinImpact/View/Windows/GearTask/AddTaskNodeDialog.xaml

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+<ui:FluentWindow x:Class="BetterGenshinImpact.View.Windows.GearTask.AddTaskNodeDialog"
+                 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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+                 xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"
+                 xmlns:windows="clr-namespace:BetterGenshinImpact.ViewModel.Windows"
+                 xmlns:gearTask="clr-namespace:BetterGenshinImpact.ViewModel.Windows.GearTask"
+                 d:DataContext="{d:DesignInstance Type=gearTask:AddTaskNodeDialogViewModel}"
+                 Width="450"
+                 Height="300"
+                 MinWidth="400"
+                 MinHeight="250"
+                 ui:Design.Background="{DynamicResource ApplicationBackgroundBrush}"
+                 ui:Design.Foreground="{DynamicResource TextFillColorPrimaryBrush}"
+                 ExtendsContentIntoTitleBar="True"
+                 FontFamily="{DynamicResource TextThemeFontFamily}"
+                 ResizeMode="NoResize"
+                 WindowStartupLocation="CenterOwner"
+                 WindowStyle="SingleBorderWindow"
+                 mc:Ignorable="d">
+
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="*" />
+            <RowDefinition Height="Auto" />
+        </Grid.RowDefinitions>
+
+        <!-- 标题栏 -->
+        <ui:TitleBar Name="MyTitleBar" Grid.Row="0" Title="添加任务">
+            <ui:TitleBar.Icon>
+                <ui:ImageIcon Source="pack://application:,,,/Resources/Images/logo.png" />
+            </ui:TitleBar.Icon>
+        </ui:TitleBar>
+
+        <!-- 内容区域 -->
+        <Grid Grid.Row="1" Margin="24">
+            <Grid.RowDefinitions>
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="*" />
+            </Grid.RowDefinitions>
+
+            <!-- 任务类型显示 -->
+            <ui:TextBlock Grid.Row="0"
+                          Margin="0,0,0,8"
+                          FontSize="14"
+                          FontWeight="SemiBold"
+                          Text="{Binding TaskType, StringFormat='任务类型: {0}'}" />
+
+            <!-- 任务名称 -->
+            <ui:TextBlock Grid.Row="1"
+                          Margin="0,0,0,4"
+                          Text="任务名称 *" />
+            <ui:TextBox Grid.Row="2"
+                        Margin="0,0,0,16"
+                        Text="{Binding TaskName, UpdateSourceTrigger=PropertyChanged}" />
+
+            <!-- 任务描述 -->
+            <ui:TextBlock Grid.Row="3"
+                          Margin="0,0,0,4"
+                          Text="任务描述" />
+            <ui:TextBox Grid.Row="4"
+                        Margin="0,0,0,0"
+                        AcceptsReturn="True"
+                        TextWrapping="Wrap"
+                        VerticalScrollBarVisibility="Auto"
+                        Text="{Binding TaskDescription, UpdateSourceTrigger=PropertyChanged}" />
+        </Grid>
+
+        <!-- 按钮区域 -->
+        <Grid Grid.Row="2" Margin="24,0,24,24">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="Auto" />
+            </Grid.ColumnDefinitions>
+
+            <StackPanel Grid.Column="1" Orientation="Horizontal">
+                <ui:Button Margin="0,0,8,0"
+                           Appearance="Primary"
+                           Command="{Binding ConfirmCommand}"
+                           Content="确定"
+                           IsDefault="True" />
+                <ui:Button Command="{Binding CancelCommand}"
+                           Content="取消"
+                           IsCancel="True" />
+            </StackPanel>
+        </Grid>
+    </Grid>
+</ui:FluentWindow>