Images used in canvas layers are now stored in a dedicated 'CanvasImages' object store in IndexedDB, referenced by unique imageId. The Canvas class and db.js were updated to support saving, loading, and removing images by imageId, improving performance and scalability. Legacy imageSrc handling is preserved for backward compatibility, and the database schema version was incremented to 2 to support the new store.
Standardized spacing and object literal formatting across multiple JS files for improved readability and consistency. No functional changes were made. Minor Python formatting adjustment for line length in canvas_node.py.
Introduces a 'Clear Cache' button to the Canvas widget UI, allowing users to clear all saved canvas states. Implements the clearAllCanvasStates function in db.js to handle the deletion of all canvas state entries from the database.
Replaced localStorage usage in Canvas.js with asynchronous IndexedDB operations for saving, loading, and removing canvas state. Added a new db.js module to handle IndexedDB interactions, improving scalability and reliability of state persistence.
