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/DiagnoseWindow.xaml

@@ -0,0 +1,32 @@
+<ui:FluentWindow x:Class="EverythingToJpeg.App.Views.DiagnoseWindow"
+                 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="진단"
+                 Width="640" Height="540"
+                 ExtendsContentIntoTitleBar="True"
+                 WindowBackdropType="Mica"
+                 WindowCornerPreference="Round"
+                 WindowStartupLocation="CenterOwner">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="Auto"/>
+        </Grid.RowDefinitions>
+        <ui:TitleBar Grid.Row="0" Title="진단"/>
+        <ScrollViewer Grid.Row="1" Margin="32,8,32,16" VerticalScrollBarVisibility="Auto">
+            <StackPanel x:Name="ItemsPanel"/>
+        </ScrollViewer>
+        <Border Grid.Row="2" Padding="32,16"
+                Background="{DynamicResource LayerOnAcrylicFillColorDefaultBrush}"
+                BorderThickness="0,1,0,0"
+                BorderBrush="{DynamicResource ControlStrokeColorDefaultBrush}">
+            <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
+                <ui:Button Content="새로고침" Icon="{ui:SymbolIcon ArrowClockwise24}"
+                           Click="OnRefreshClick" Margin="0,0,8,0"/>
+                <ui:Button Content="닫기" Click="OnCloseClick" Appearance="Primary"/>
+            </StackPanel>
+        </Border>
+    </Grid>
+</ui:FluentWindow>