Refactored image creation APIs to use byte[] for logo data instead of System.Drawing.Image, enabling cross-platform support. Wrapped all GDI+/Windows-specific code in #if WINDOWS and updated project files to conditionally include Windows-only dependencies. Defaulted to ImageSharp on non-Windows, and updated UI and settings to reflect platform capabilities. Application now builds and runs on Linux/macOS with Avalonia and ImageSharp, while retaining full Windows functionality.
Replaced multiple mutually-exclusive boolean properties for thumbnail text options with a single enum (`ThumbnailOption`) in the data model. Updated WinForms UI to use a ComboBox instead of radio buttons for selecting thumbnail mode. Adjusted designer, mapping profile, settings DTO, and settings service for enum support and backward compatibility. Simplified thumbnail generation logic and improved maintainability by ensuring only one mode can be selected at a time.
Integrates optional AI/OCR (AIFotoONLUS.Core) support to extract numbers from images after processing. Adds new "AI" tab in the UI for enabling extraction, selecting models folder, specifying CSV output, and previewing results. Results can be exported to CSV. Uses reflection for AI library invocation, with fallback simulation if unavailable. Persists new AI settings. Updates related NuGet packages and adds theme resources.
- Allow users to select a transparent color for logo images (watermarks) via UI (checkbox, color picker, preview).
- Apply color-key transparency in both System.Drawing and ImageSharp backends: specified color in logo is made fully transparent.
- Persist transparency settings in PicSettings and SettingsDto; bind to DataModel and UI controls.
- Update logo preview to reflect transparency in real time.
- Add option to select image processing library (System.Drawing or ImageSharp) in UI and settings.
- Fix bug in SettingsService parameter loading for int/double/DateTime.
- Fully integrate color-key transparency into image processing and settings serialization.
Enhanced speed counter with smoothing and elapsed time display.
Added folder open buttons to UI and repositioned speed label.
Added UpdateSubdirectories to settings for persistence.
