优化更新代码，添加界面功能并整合

WPFluent/Controls/NavigationView/NavigationViewContentPresenter.xaml

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+<!--
+    This Source Code Form is subject to the terms of the MIT License.
+    If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+    Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+    All Rights Reserved.
+    
+    Based on Microsoft XAML for Win UI
+    Copyright (c) Microsoft Corporation. All Rights Reserved.
+-->
+
+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:controls="clr-namespace:WPFluent.Controls">
+
+    <ControlTemplate x:Key="DefaultNavigationViewContentPresenterControlTemplate" TargetType="{x:Type controls:NavigationViewContentPresenter}">
+        <ContentPresenter x:Name="PART_FrameCP" Margin="{TemplateBinding Padding}" />
+    </ControlTemplate>
+
+    <ControlTemplate x:Key="DefaultNavigationViewContentPresenterWithDynamicScrollViewerControlTemplate" TargetType="{x:Type controls:NavigationViewContentPresenter}">
+        <controls:DynamicScrollViewer
+            HorizontalAlignment="Stretch"
+            VerticalAlignment="Stretch"
+            Focusable="False">
+            <ContentPresenter x:Name="PART_FrameCP" Margin="{TemplateBinding Padding}" />
+        </controls:DynamicScrollViewer>
+    </ControlTemplate>
+
+    <Style x:Key="DefaultNavigationViewContentPresenterStyle" TargetType="{x:Type controls:NavigationViewContentPresenter}">
+        <Setter Property="FocusVisualStyle" Value="{x:Null}" />
+        <Setter Property="IsTabStop" Value="False" />
+        <Setter Property="SnapsToDevicePixels" Value="True" />
+        <Setter Property="OverridesDefaultStyle" Value="True" />
+        <Setter Property="JournalOwnership" Value="OwnsJournal" />
+
+        <Style.Triggers>
+            <Trigger Property="IsDynamicScrollViewerEnabled" Value="True">
+                <Setter Property="Template" Value="{StaticResource DefaultNavigationViewContentPresenterWithDynamicScrollViewerControlTemplate}" />
+            </Trigger>
+            <Trigger Property="IsDynamicScrollViewerEnabled" Value="False">
+                <Setter Property="Template" Value="{StaticResource DefaultNavigationViewContentPresenterControlTemplate}" />
+            </Trigger>
+        </Style.Triggers>
+    </Style>
+
+    <Style BasedOn="{StaticResource DefaultNavigationViewContentPresenterStyle}" TargetType="{x:Type controls:NavigationViewContentPresenter}" />
+
+</ResourceDictionary>