초기 커밋: Phase 1 — 레지스트리 기반 컨텍스트 메뉴 + 핵심 변환 파이프라인

- Provider 추상화(IConverterProvider + ProviderCapability) — Available/RequiresExternal/ComingSoon 1급 시민
- 변환 구현: Magick(이미지·RAW·GIF·TIFF), HEIC/HEIF(libheif decode→Magick encode), PDF(PDFium), DOCX(Word COM 또는 LibreOffice 자동 감지)
- ComingSoon 스텁: HTML, HWP/HWPX (UI 노출, 컨텍스트 메뉴 등록 자동 제외)
- WPF + WPF-UI 4.3 Fluent 2 UI: 메인 창(드래그&드롭, Provider 카드), 변환 창(썸네일·옵션·진행률), 빠른 변환 진행 창, 진단 창
- 단일 EXE에 verb 라우팅: quick / dialog / register / unregister / diagnose / help
- HKCU SystemFileAssociations 기반 컨텍스트 메뉴 등록 (Win11 "추가 옵션 표시"에 노출)
- README, packaging/ Phase 2 placeholder 포함

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/EverythingToJpeg.App/Views/QuickProgressWindow.xaml

@@ -0,0 +1,40 @@
+<ui:FluentWindow x:Class="EverythingToJpeg.App.Views.QuickProgressWindow"
+                 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                 xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"
+                 Title="JPEG로 빠른 변환"
+                 Width="560" Height="220"
+                 ExtendsContentIntoTitleBar="True"
+                 WindowBackdropType="Mica"
+                 WindowCornerPreference="Round"
+                 WindowStartupLocation="CenterScreen"
+                 ResizeMode="NoResize">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="*"/>
+        </Grid.RowDefinitions>
+        <ui:TitleBar Grid.Row="0" Title="JPEG로 빠른 변환"/>
+        <Grid Grid.Row="1" Margin="32,12,32,24">
+            <Grid.RowDefinitions>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition Height="*"/>
+                <RowDefinition Height="Auto"/>
+            </Grid.RowDefinitions>
+            <TextBlock Text="변환 중…" Style="{StaticResource TextSubtitle}"/>
+            <TextBlock x:Name="StatusText" Grid.Row="1" Margin="0,4,0,12"
+                       Style="{StaticResource TextCaption}" TextTrimming="CharacterEllipsis"/>
+            <ProgressBar x:Name="OverallProgress" Grid.Row="2" Height="6"
+                         Minimum="0" Maximum="1"/>
+            <StackPanel Grid.Row="4" Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,12,0,0">
+                <ui:Button x:Name="OpenFolderButton" Content="결과 폴더 열기"
+                           Icon="{ui:SymbolIcon Folder24}"
+                           Click="OnOpenFolderClick" IsEnabled="False" Margin="0,0,8,0"/>
+                <ui:Button x:Name="CloseButton" Content="닫기" Click="OnCloseClick"
+                           Appearance="Primary" IsEnabled="False"/>
+            </StackPanel>
+        </Grid>
+    </Grid>
+</ui:FluentWindow>