v1.5.2

Added

• Add maxHistorySize as a configurable undo/redo history bound for large image sessions.
• Add regression coverage for crop apply locking, safe user callbacks, transform input validation, DOM disable restoration, placeholder suppression, and low-risk runtime hardening paths.

Fixed

• Prevent cancelCrop() and crop reentry from mutating crop state while applyCrop() is in progress.
• Keep successful image loads and mask creation committed when observer callbacks throw, reporting callback failures through warnings instead.
• Fall back safely when label callbacks throw, reject non-finite transform inputs, and validate crop regions before export.
• Keep canvas interaction available in crop mode, restore disabled/aria-disabled/pointer-events state on dispose, and consistently honor showPlaceholder: false.
• Normalize invalid numeric runtime options, bound history size, report unsupported file selections once, validate JPEG background colors, reject degenerate polygon masks, and isolate throwing custom mask generators.