feat: implement dark and light mode

App.xaml

@@ -3,6 +3,10 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              StartupUri="MainWindow.xaml">
     <Application.Resources>
-
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="Themes/LightMode.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
     </Application.Resources>
 </Application>

App.xaml.cs

@@ -1,8 +1,53 @@
+using System;
 using System.Windows;
+using Microsoft.Win32;
 
 namespace UnifiedExplorer
 {
     public partial class App : Application
     {
+        public static AppSettings Settings { get; set; } = new AppSettings();
+
+        protected override void OnStartup(StartupEventArgs e)
+        {
+            base.OnStartup(e);
+
+            Settings = SettingsManager.LoadSettings();
+            ApplyTheme(Settings.Theme);
+
+            SystemEvents.UserPreferenceChanged += SystemEvents_UserPreferenceChanged;
+        }
+
+        private void SystemEvents_UserPreferenceChanged(object sender, UserPreferenceChangedEventArgs e)
+        {
+            if (e.Category == UserPreferenceCategory.General && Settings.Theme == ThemeMode.System)
+            {
+                ApplyTheme(ThemeMode.System);
+            }
+        }
+
+        public static void ApplyTheme(ThemeMode mode)
+        {
+            Settings.Theme = mode;
+            SettingsManager.SaveSettings(Settings);
+
+            bool isLight = true;
+            if (mode == ThemeMode.Dark)
+            {
+                isLight = false;
+            }
+            else if (mode == ThemeMode.System)
+            {
+                isLight = SettingsManager.IsSystemThemeLight();
+            }
+
+            var dict = new ResourceDictionary();
+            dict.Source = isLight 
+                ? new Uri("Themes/LightMode.xaml", UriKind.Relative)
+                : new Uri("Themes/DarkMode.xaml", UriKind.Relative);
+
+            Current.Resources.MergedDictionaries.Clear();
+            Current.Resources.MergedDictionaries.Add(dict);
+        }
     }
 }

SettingsManager.cs

@@ -0,0 +1,68 @@
+using System;
+using System.IO;
+using System.Text.Json;
+using Microsoft.Win32;
+
+namespace UnifiedExplorer
+{
+    public enum ThemeMode
+    {
+        Light,
+        Dark,
+        System
+    }
+
+    public class AppSettings
+    {
+        public ThemeMode Theme { get; set; } = ThemeMode.System;
+    }
+
+    public static class SettingsManager
+    {
+        private static readonly string SettingsFile = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "appsettings.json");
+
+        public static AppSettings LoadSettings()
+        {
+            if (File.Exists(SettingsFile))
+            {
+                try
+                {
+                    string json = File.ReadAllText(SettingsFile);
+                    var settings = JsonSerializer.Deserialize<AppSettings>(json);
+                    if (settings != null) return settings;
+                }
+                catch { }
+            }
+            return new AppSettings();
+        }
+
+        public static void SaveSettings(AppSettings settings)
+        {
+            try
+            {
+                string json = JsonSerializer.Serialize(settings, new JsonSerializerOptions { WriteIndented = true });
+                File.WriteAllText(SettingsFile, json);
+            }
+            catch { }
+        }
+
+        public static bool IsSystemThemeLight()
+        {
+            try
+            {
+                using var key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize");
+                if (key != null)
+                {
+                    var value = key.GetValue("AppsUseLightTheme");
+                    if (value is int i)
+                    {
+                        return i == 1;
+                    }
+                }
+            }
+            catch { }
+
+            return true;
+        }
+    }
+}

SettingsWindow.xaml

@@ -0,0 +1,17 @@
+<Window x:Class="UnifiedExplorer.SettingsWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Settings" Height="200" Width="300"
+        WindowStartupLocation="CenterOwner" ResizeMode="NoResize"
+        Background="{DynamicResource BackgroundColor}"
+        Foreground="{DynamicResource TextColor}">
+    <Grid Margin="15">
+        <StackPanel>
+            <TextBlock Text="Theme Settings" FontSize="16" FontWeight="Bold" Margin="0,0,0,15" Foreground="{DynamicResource TextColor}"/>
+
+            <RadioButton x:Name="DarkThemeRadio" Content="Darkmode" Margin="0,5" Checked="ThemeRadio_Checked" Tag="Dark" Foreground="{DynamicResource TextColor}"/>
+            <RadioButton x:Name="LightThemeRadio" Content="Lightmode" Margin="0,5" Checked="ThemeRadio_Checked" Tag="Light" Foreground="{DynamicResource TextColor}"/>
+            <RadioButton x:Name="SystemThemeRadio" Content="Systemsettings" Margin="0,5" Checked="ThemeRadio_Checked" Tag="System" Foreground="{DynamicResource TextColor}"/>
+        </StackPanel>
+    </Grid>
+</Window>

SettingsWindow.xaml.cs

@@ -0,0 +1,48 @@
+using System.Windows;
+
+namespace UnifiedExplorer
+{
+    public partial class SettingsWindow : Window
+    {
+        private bool _isInitialized = false;
+
+        public SettingsWindow()
+        {
+            InitializeComponent();
+
+            // Set initial state based on current settings
+            switch (App.Settings.Theme)
+            {
+                case ThemeMode.Light:
+                    LightThemeRadio.IsChecked = true;
+                    break;
+                case ThemeMode.Dark:
+                    DarkThemeRadio.IsChecked = true;
+                    break;
+                case ThemeMode.System:
+                    SystemThemeRadio.IsChecked = true;
+                    break;
+            }
+
+            _isInitialized = true;
+        }
+
+        private void ThemeRadio_Checked(object sender, RoutedEventArgs e)
+        {
+            if (!_isInitialized) return;
+
+            if (DarkThemeRadio.IsChecked == true)
+            {
+                App.ApplyTheme(ThemeMode.Dark);
+            }
+            else if (LightThemeRadio.IsChecked == true)
+            {
+                App.ApplyTheme(ThemeMode.Light);
+            }
+            else if (SystemThemeRadio.IsChecked == true)
+            {
+                App.ApplyTheme(ThemeMode.System);
+            }
+        }
+    }
+}

Themes/DarkMode.xaml

@@ -0,0 +1,11 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <SolidColorBrush x:Key="BackgroundColor" Color="#191919"/>
+    <SolidColorBrush x:Key="MenuBarColor" Color="#2c2c2c"/>
+    <SolidColorBrush x:Key="TextColor" Color="#98e7e5e5"/> <!-- e7e5e598 wait, ARGB in WPF is #AARRGGBB, issue has #e7e5e598, so A=98, R=e7, G=e5, B=e5 -->
+    <SolidColorBrush x:Key="SelectColor" Color="#272727"/>
+    <SolidColorBrush x:Key="SelectedColor" Color="#b68989"/>
+    <SolidColorBrush x:Key="FolderColor" Color="#ffd767"/>
+    <SolidColorBrush x:Key="FolderStringColor" Color="#2b2c31"/>
+    <SolidColorBrush x:Key="BottomBarColor" Color="#4a4a4a"/>
+</ResourceDictionary>

Themes/GlobalStyles.xaml

@@ -0,0 +1,74 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <Style TargetType="ListBoxItem" x:Key="CustomListBoxItemStyle">
+        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
+        <Setter Property="Padding" Value="5,4"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="ListBoxItem">
+                    <Border x:Name="Bd" Background="{TemplateBinding Background}" BorderThickness="0" Padding="{TemplateBinding Padding}">
+                        <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter TargetName="Bd" Property="Background" Value="{DynamicResource SelectColor}"/>
+                        </Trigger>
+                        <Trigger Property="IsSelected" Value="True">
+                            <Setter TargetName="Bd" Property="Background" Value="{DynamicResource SelectedColor}"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <Style TargetType="TreeViewItem" x:Key="CustomTreeViewItemStyle">
+        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
+        <Setter Property="Padding" Value="5,4"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="TreeViewItem">
+                    <StackPanel>
+                        <Border x:Name="Bd" Background="{TemplateBinding Background}" BorderThickness="0" Padding="{TemplateBinding Padding}">
+                            <ContentPresenter x:Name="PART_Header" ContentSource="Header" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
+                        </Border>
+                        <ItemsPresenter x:Name="ItemsHost" Visibility="Collapsed"/>
+                    </StackPanel>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsExpanded" Value="True">
+                            <Setter TargetName="ItemsHost" Property="Visibility" Value="Visible"/>
+                        </Trigger>
+                        <Trigger Property="IsMouseOver" Value="True" SourceName="Bd">
+                            <Setter TargetName="Bd" Property="Background" Value="{DynamicResource SelectColor}"/>
+                        </Trigger>
+                        <Trigger Property="IsSelected" Value="True">
+                            <Setter TargetName="Bd" Property="Background" Value="{DynamicResource SelectedColor}"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <Style TargetType="ListViewItem" x:Key="CustomListViewItemStyle">
+        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
+        <Setter Property="Padding" Value="2"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="ListViewItem">
+                    <Border x:Name="Bd" Background="{TemplateBinding Background}" BorderThickness="0" Padding="{TemplateBinding Padding}">
+                        <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter TargetName="Bd" Property="Background" Value="{DynamicResource SelectColor}"/>
+                        </Trigger>
+                        <Trigger Property="IsSelected" Value="True">
+                            <Setter TargetName="Bd" Property="Background" Value="{DynamicResource SelectedColor}"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+</ResourceDictionary>

Themes/LightMode.xaml

@@ -0,0 +1,11 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <SolidColorBrush x:Key="BackgroundColor" Color="#f0f0f0"/>
+    <SolidColorBrush x:Key="MenuBarColor" Color="#f3f3f3"/>
+    <SolidColorBrush x:Key="TextColor" Color="#1d1d1d"/>
+    <SolidColorBrush x:Key="SelectColor" Color="#d9d9d9"/>
+    <SolidColorBrush x:Key="SelectedColor" Color="#afaf99"/>
+    <SolidColorBrush x:Key="FolderColor" Color="#f3b10c"/>
+    <SolidColorBrush x:Key="FolderStringColor" Color="#bbbbbb"/>
+    <SolidColorBrush x:Key="BottomBarColor" Color="#f3f3f3"/>
+</ResourceDictionary>

UnifiedExplorer.csproj

@@ -6,9 +6,9 @@
     <Nullable>enable</Nullable>
     <UseWPF>true</UseWPF>
     <ApplicationIcon>assets\app.ico</ApplicationIcon>
-    <Version>1.0.0</Version>
+    <Version>1.0.1</Version>
     <AssemblyVersion>1.0.0.0</AssemblyVersion>
-    <FileVersion>1.0.0.0</FileVersion>
+    <FileVersion>1.0.1.0</FileVersion>
   </PropertyGroup>
 
   <ItemGroup>