v1.4.0

Added

• similarity-threshold prop for DiffHtml — when text similarity falls below the threshold, renders a clean full replacement (old text deleted, new text added) instead of garbled word-level diff
• computeTextSimilarity utility using Dice coefficient via diffWords
• Test suite with Vitest covering all 6 component types and similarity utility (45 tests)
• ESLint 9 + Husky pre-commit hook (lint + test)
• CHANGELOG.md
• Demo section showing similarity threshold with side-by-side comparison
• Playground threshold slider for DiffHtml

Changed

• DiffHtml template now supports conditional full-replacement rendering