Completely removed GDI

.github/copilot-instructions.md

@@ -42,21 +42,17 @@ The main app launches Avalonia directly. Dialog events (`SelectSourceFolderReque
 1. User configures paths/settings in the UI (`DataModel.cs` — MVVM ViewModel)
 2. `ProcessImagesCommand` triggers `ImageCreationService`
 3. `ImageCreationService` processes files in parallel chunks, with configurable concurrency and batch size (GC flush between chunks)
-4. Each file is handled by an `IImageCreator` implementation (GDI+ or ImageSharp)
+4. Each file is handled by the ImageSharp `IImageCreator` implementation
 5. Output: resized/watermarked/overlaid images written to a destination folder hierarchy
 
 ### Key Abstractions (MaddoShared)
 
-- **`IImageCreator`** — single async method to process one image; two implementations: `ImageCreatorGDI` (System.Drawing) and `ImageCreatorSharp` (SixLabors.ImageSharp)
+- **`IImageCreator`** — single async method to process one image; implemented by `ImageCreatorImageSharp` (SixLabors.ImageSharp)
 - **`ImageCreationService`** — parallel orchestrator; uses `AsyncEnumerator` with chunking; loads logo once, clones per thread for thread safety
 - **`ImageState`** — per-file processing context (input path, EXIF orientation, thumbnail sizes, overlays, logo, rotation)
-- **`PicSettings`** — 50+ property configuration model (dimensions, fonts, colors, JPEG quality, watermark, logo positioning, `ImageCreatorProvider` selector)
+- **`PicSettings`** — 50+ property configuration model (dimensions, fonts, colors, JPEG quality, watermark, logo positioning)
 - **`FileHelperSharp`** — recursive file enumeration with folder-per-N-files mapping and counter formatting
 
-### Implementation Selection
-
-`PicSettings.ImageCreatorProvider` switches between `"Sharp"` (SixLabors.ImageSharp) and `"Alternate"` (GDI+) at runtime.
-
 ## Conventions
 
 ### C# Style