Michael Czechowski 4cdffdfa21 feat: add undo/redo/reset editor tools with keyboard shortcuts ...

- Add history extension to CodeMirror for undo/redo support
- Ctrl+Z for undo, Ctrl+Shift+Z for redo now work
- Add toolbar buttons: ↶ Undo, ↷ Redo, ⟲ Reset
- Reset button restores editor to initial lesson code
- Add .btn-icon and .editor-tools CSS styles

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2025-12-23 23:14:32 +01:00

..

CodeEditor.js

feat: add undo/redo/reset editor tools with keyboard shortcuts

2025-12-23 23:14:32 +01:00

LessonEngine.js

fix: resolve initialization bugs breaking level indicator and expected preview

2025-12-22 10:04:41 +01:00