Removed redundant and explanatory comments from CanvasInteractions.js, CanvasLayers.js, and ClipboardManager.js to improve code readability. Deleted the REFACTORING_GUIDE.md documentation file. Minor code cleanups were made to event handler logic and UI widget setup, with no changes to core functionality.
Adds robust clipboard and drag & drop support for images, including ComfyUI Clipspace integration, system clipboard fallback, and improved user feedback. Clipboard and paste logic is centralized and clarified, with priority handling for internal clipboard, ComfyUI Clipspace, and system clipboard. Drag & drop is now handled at the canvas level, and tooltips and notifications provide clearer guidance for users.
Updated isValidImagePath to recognize and validate image URLs in addition to local file paths. The function now checks for valid URL formats and logs debug information for both URLs and local paths.
Moved all system clipboard paste and image path handling logic from CanvasLayers.js into a new ClipboardManager utility class. This improves code organization and separation of concerns, making clipboard-related functionality easier to maintain and extend.
