🎯 Clean Section Editor Demo

This demonstrates the new TDD-driven, object-oriented section editor architecture.

• ✅ Stable: No content bleeding between sections
• ✅ Testable: Business logic separated from DOM
• ✅ Reliable: Proper state management
• ✅ User-friendly: Clear visual feedback and controls

Instructions:

1. Click on any section below to start editing
2. Make changes and notice the yellow background (modified state)
3. Use the buttons on the right: Accept ✓, Cancel ✗, Reset 🔄
4. Try clicking between sections - your changes are preserved!
5. Use the control panel on the left for document-level actions

Keyboard shortcuts: Ctrl+Enter (Accept), Escape (Cancel), Ctrl+S (Save), Ctrl+R (Reset All)