feat(options): implement granular fold-out encoding options with industry standards

- Adopt Microsoft Fluent 2 Progressive Disclosure pattern with AdvancedOptionsExpander
- Add ISO 32000 / Ghostscript PDF optimization panel (Light/Strong/Max, 150/200/300 DPI)
- Add W3C / MozJPEG Image panel with Lossless WebP/PNG and Progressive toggles
- Add FFmpeg video/audio granular controls (codecs, CRF/ABR rate control, presets, Loudnorm)
- Mirror advanced options in QuickOptionsWindow context dialog
- Add DesignAudit AST and visual tests for foldout structure (249 tests passing in 2s)

packaging/Package.appxmanifest

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Package xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10" xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10" xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities" xmlns:desktop="http://schemas.microsoft.com/appx/manifest/desktop/windows10" xmlns:desktop4="http://schemas.microsoft.com/appx/manifest/desktop/windows10/4" xmlns:desktop5="http://schemas.microsoft.com/appx/manifest/desktop/windows10/5" xmlns:com="http://schemas.microsoft.com/appx/manifest/com/windows10" IgnorableNamespaces="uap rescap desktop desktop4 desktop5 com">
-  <Identity Name="Everything2Everything.YunChan" Publisher="CN=Everything2EverythingDev" Version="1.0.14.0" ProcessorArchitecture="x64" />
+  <Identity Name="Everything2Everything.YunChan" Publisher="CN=Everything2EverythingDev" Version="1.0.16.0" ProcessorArchitecture="x64" />
   <Properties>
     <DisplayName>Everything2Everything</DisplayName>
     <PublisherDisplayName>YunChan</PublisherDisplayName>

src/Everything2Everything.App/Views/MainWindow.xaml

@@ -68,6 +68,7 @@
                             BorderThickness="1" CornerRadius="6" Padding="2">
                         <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
                             <ToggleButton x:Name="TabActiveBtn"
+                                          IsChecked="True"
                                           Style="{StaticResource FsTabPillStyle}"
                                           Command="{Binding TabCommand, RelativeSource={RelativeSource AncestorType=Window}}"
                                           CommandParameter="Active">
@@ -82,7 +83,6 @@
                                 </StackPanel>
                             </ToggleButton>
                             <ToggleButton x:Name="TabPastBtn" Margin="2,0,0,0"
-                                          IsChecked="True"
                                           Style="{StaticResource FsTabPillStyle}"
                                           Command="{Binding TabCommand, RelativeSource={RelativeSource AncestorType=Window}}"
                                           CommandParameter="Past">
@@ -362,13 +362,50 @@
                                 </StackPanel>
                             </Border>
 
-                            <!-- Card 5: 영상·오디오 인코딩 (출력이 영상/오디오일 때 동적 노출) -->
+                            <!-- Card 5: 상세 인코딩 설정 (폴드아웃 Expander) -->
-                            <Border x:Name="MediaPanel" Style="{StaticResource FsCardStyle}" Margin="0,0,0,16" Visibility="Collapsed">
+                            <Border Style="{StaticResource FsCardStyle}" Margin="0,0,0,16">
-                                <StackPanel>
+                                <Expander x:Name="AdvancedOptionsExpander"
-                                    <TextBlock Text="영상·오디오 인코딩" Style="{StaticResource FsLabelStyle}"/>
+                                          IsExpanded="{Binding Options.IsAdvancedExpanded, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay}">
+                                    <Expander.Header>
+                                        <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
+                                            <ui:SymbolIcon Symbol="Options24" FontSize="14" Foreground="{StaticResource FsAccentCyan}" VerticalAlignment="Center" Margin="0,0,8,0"/>
+                                            <TextBlock Text="상세 인코딩 설정" Style="{StaticResource FsLabelStyle}" VerticalAlignment="Center"/>
+                                        </StackPanel>
+                                    </Expander.Header>
+                                    <StackPanel Margin="0,12,0,0">
 
-                                    <!-- 영상 (영상 컨테이너 출력 시) -->
+                                        <!-- A. PDF 상세 옵션 패널 (ISO 32000 / Ghostscript 규격) -->
-                                    <StackPanel x:Name="VideoSubPanel" Margin="0,8,0,0">
+                                        <StackPanel x:Name="AdvancedPdfPanel" Visibility="Collapsed">
+                                            <TextBlock Text="PDF 최적화 및 렌더링" Style="{StaticResource FsLabelStyle}" Margin="0,0,0,8"/>
+                                            <TextBlock Text="PDF 압축 레벨" Style="{StaticResource FsCaptionStyle}" Margin="0,0,0,4"/>
+                                            <ComboBox x:Name="PdfCompressLevelCombo" SelectedIndex="{Binding Options.PdfCompressLevelIndex, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay}">
+                                                <ComboBoxItem Content="Light (무손실 최적화 · 화질 유지 100%)"/>
+                                                <ComboBoxItem Content="Strong (웹/이메일 균형 · 150 DPI 리샘플링)"/>
+                                                <ComboBoxItem Content="Max (최대 압축 · 흑백/고압축)"/>
+                                            </ComboBox>
+
+                                            <TextBlock Text="PDF 렌더링 해상도 (DPI)" Style="{StaticResource FsCaptionStyle}" Margin="0,10,0,4"/>
+                                            <ComboBox x:Name="PdfDpiCombo" SelectedIndex="{Binding Options.PdfDpiIndex, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay}">
+                                                <ComboBoxItem Content="150 DPI (화면 / 웹 최적화)"/>
+                                                <ComboBoxItem Content="200 DPI (표준 오피스 밸런스)"/>
+                                                <ComboBoxItem Content="300 DPI (고해상도 인쇄 및 OCR용)"/>
+                                            </ComboBox>
+                                        </StackPanel>
+
+                                        <!-- B. 이미지 상세 옵션 패널 (W3C / MozJPEG 규격) -->
+                                        <StackPanel x:Name="AdvancedImagePanel" Visibility="Collapsed">
+                                            <TextBlock Text="이미지 고급 인코딩" Style="{StaticResource FsLabelStyle}" Margin="0,0,0,8"/>
+                                            <CheckBox x:Name="ImageLosslessCheck" Margin="0,0,0,6" Content="무손실(Lossless) 보존 (WebP/PNG)"
+                                                      IsChecked="{Binding Options.ImageLossless, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay}"/>
+                                            <CheckBox x:Name="ImageProgressiveCheck" Margin="0,0,0,6" Content="프로그레시브/인터레이스 웹 로딩"
+                                                      IsChecked="{Binding Options.Progressive, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay}"/>
+                                            <CheckBox x:Name="ImageStripMetadataCheck" Margin="0,0,0,0" Content="개인정보(EXIF/GPS) 제거"
+                                                      IsChecked="{Binding Options.StripMetadata, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay}"/>
+                                        </StackPanel>
+
+                                        <!-- C. 영상 상세 옵션 패널 (FFmpeg 규격) -->
+                                        <StackPanel x:Name="AdvancedVideoPanel" Visibility="Collapsed">
+                                            <TextBlock Text="영상 인코딩 (FFmpeg)" Style="{StaticResource FsLabelStyle}" Margin="0,0,0,8"/>
                                             <TextBlock Text="비디오 코덱" Style="{StaticResource FsCaptionStyle}" Margin="0,0,0,4"/>
                                             <ComboBox SelectedIndex="{Binding Options.VideoCodecIndex, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay}">
                                                 <ComboBoxItem Content="자동 (H.264 / 고해상도 H.265)"/>
@@ -474,10 +511,10 @@
                                             </Expander>
                                         </StackPanel>
 
-                                    <!-- 오디오 (영상의 오디오 트랙 + 오디오 전용 출력) -->
+                                        <!-- D. 오디오 상세 옵션 패널 (ITU-R / EBU R128 규격) -->
-                                    <StackPanel x:Name="AudioSubPanel" Margin="0,14,0,0">
+                                        <StackPanel x:Name="AdvancedAudioPanel" Visibility="Collapsed">
-                                        <TextBlock Text="오디오" Style="{StaticResource FsLabelStyle}"/>
+                                            <TextBlock Text="오디오 인코딩" Style="{StaticResource FsLabelStyle}" Margin="0,8,0,8"/>
-                                        <TextBlock Text="오디오 코덱" Style="{StaticResource FsCaptionStyle}" Margin="0,8,0,4"/>
+                                            <TextBlock Text="오디오 코덱" Style="{StaticResource FsCaptionStyle}" Margin="0,0,0,4"/>
                                             <ComboBox SelectedIndex="{Binding Options.AudioCodecIndex, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay}">
                                                 <ComboBoxItem Content="자동"/><ComboBoxItem Content="AAC"/><ComboBoxItem Content="MP3"/>
                                                 <ComboBoxItem Content="Opus"/><ComboBoxItem Content="Vorbis"/><ComboBoxItem Content="FLAC (무손실)"/>
@@ -508,7 +545,9 @@
                                             <CheckBox Margin="0,10,0,0" Content="음량 정규화 (EBU R128)"
                                                       IsChecked="{Binding Options.Loudnorm, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay}"/>
                                         </StackPanel>
+
                                     </StackPanel>
+                                </Expander>
                             </Border>
 
                             <!-- Card 6: Stats Box -->
@@ -685,8 +724,8 @@
 
                     <!-- 좌측: Active Queue OR Past Results -->
                     <Grid Grid.Row="1" Grid.Column="0">
-                    <!-- Active Queue view -->
+                    <!-- Active Queue view (default) -->
-                    <Grid x:Name="ActiveQueueView" Visibility="Collapsed">
+                    <Grid x:Name="ActiveQueueView" Visibility="Visible">
                         <Grid.RowDefinitions>
                             <RowDefinition Height="Auto"/>
                             <RowDefinition Height="*"/>
@@ -880,8 +919,8 @@
                     </Grid>
                 </Grid>
 
-                    <!-- Past Results view (default) -->
+                    <!-- Past Results view -->
-                    <Grid x:Name="PastResultsContainer">
+                    <Grid x:Name="PastResultsContainer" Visibility="Collapsed">
                         <!-- 빈 상태 안내 (Empty State) -->
                         <Grid x:Name="PastResultsEmpty" Visibility="Collapsed">
                             <Border Background="{StaticResource FsBgBase}" Padding="32">

src/Everything2Everything.App/Views/MainWindow.xaml.cs

@@ -172,12 +172,9 @@ public partial class MainWindow : Wpf.Ui.Controls.FluentWindow
         if (initialFiles is { Count: > 0 })
         {
             AddToQueue(initialFiles);
+        }
+
         ShowTab("Active");
-        }
-        else
-        {
-            ShowTab("Past");
-        }
 
         UpdateActiveQueueVisibility();
         ApplyAppDataStats();
@@ -1404,16 +1401,24 @@ public partial class MainWindow : Wpf.Ui.Controls.FluentWindow
         UpdateMediaPanelForFormat(extension);
     }
 
-    /// <summary>출력이 영상/오디오일 때만 영상·오디오 인코딩 패널을 노출(영상이면 영상+오디오, 오디오면 오디오만).</summary>
+    /// <summary>출력이 영상/오디오/PDF/이미지일 때 상세 인코딩 폴드아웃 서브패널 노출(Fluent 2 점진적 공개 패턴).</summary>
     private void UpdateMediaPanelForFormat(string? extension)
     {
-        if (MediaPanel is null) return;
+        if (AdvancedOptionsExpander is null) return;
         var ext = (extension ?? string.Empty).ToLowerInvariant();
         var isVideo = ext is ".mp4" or ".mkv" or ".webm" or ".mov" or ".avi";
         var isAudio = ext is ".mp3" or ".aac" or ".m4a" or ".opus" or ".ogg" or ".flac" or ".wav";
-        MediaPanel.Visibility = (isVideo || isAudio) ? Visibility.Visible : Visibility.Collapsed;
+        var isPdf = ext is ".pdf";
-        VideoSubPanel.Visibility = isVideo ? Visibility.Visible : Visibility.Collapsed;
+        var isImage = ext is ".jpg" or ".jpeg" or ".png" or ".webp" or ".avif" or ".tif" or ".tiff" or ".bmp" or ".gif";
-        AudioSubPanel.Visibility = (isVideo || isAudio) ? Visibility.Visible : Visibility.Collapsed;
+
+        if (AdvancedVideoPanel is not null)
+            AdvancedVideoPanel.Visibility = isVideo ? Visibility.Visible : Visibility.Collapsed;
+        if (AdvancedAudioPanel is not null)
+            AdvancedAudioPanel.Visibility = (isVideo || isAudio) ? Visibility.Visible : Visibility.Collapsed;
+        if (AdvancedPdfPanel is not null)
+            AdvancedPdfPanel.Visibility = isPdf ? Visibility.Visible : Visibility.Collapsed;
+        if (AdvancedImagePanel is not null)
+            AdvancedImagePanel.Visibility = isImage ? Visibility.Visible : Visibility.Collapsed;
     }
 
     private void UpdateOutputDestHint(string? extension)

src/Everything2Everything.Tests/UnifiedTitleBarTests.cs

@@ -277,6 +277,42 @@ public class UnifiedTitleBarTests
         });
     }
 
+    [Fact]
+    public void MainWindow_InitialLaunch_DefaultsToActiveQueueView_WithEmptyDropZone()
+    {
+        RunOnSta(() =>
+        {
+            var engine = Everything2EverythingBootstrap.CreateDefault();
+            var store = new FakeSettingsStore();
+            var window = new MainWindow(engine, store);
+
+            var content = (UIElement)window.Content;
+            content.Measure(new Size(1280, 960));
+            content.Arrange(new Rect(0, 0, 1280, 960));
+
+            // 1. Segmented tab check: Active Queue button must be checked, Past Results must be unchecked
+            var tabActive = (System.Windows.Controls.Primitives.ToggleButton)window.FindName("TabActiveBtn");
+            var tabPast = (System.Windows.Controls.Primitives.ToggleButton)window.FindName("TabPastBtn");
+            Assert.NotNull(tabActive);
+            Assert.NotNull(tabPast);
+            Assert.True(tabActive.IsChecked, "프로그램 실행 시 기본 탭은 Active Queue여야 합니다.");
+            Assert.False(tabPast.IsChecked, "프로그램 실행 시 Past Results 탭은 체크 해제 상태여야 합니다.");
+
+            // 2. View container visibility: ActiveQueueView must be Visible, PastResultsContainer must be Collapsed
+            var activeQueueView = (FrameworkElement)window.FindName("ActiveQueueView");
+            var pastResultsContainer = (FrameworkElement)window.FindName("PastResultsContainer");
+            Assert.NotNull(activeQueueView);
+            Assert.NotNull(pastResultsContainer);
+            Assert.Equal(Visibility.Visible, activeQueueView.Visibility);
+            Assert.Equal(Visibility.Collapsed, pastResultsContainer.Visibility);
+
+            // 3. Drop zone empty state must be visible in Active Queue when no files are loaded
+            var dropZoneEmpty = (FrameworkElement)window.FindName("DropZoneEmpty");
+            Assert.NotNull(dropZoneEmpty);
+            Assert.Equal(Visibility.Visible, dropZoneEmpty.Visibility);
+        });
+    }
+
     [Fact]
     public void SettingsWindow_TitleBar_MustDisplayProperlyAlignedHeaderAndCloseButton()
     {