critical_fix_summary.dart

void main() {
  print('🐛 CRITICAL BUG FOUND & FIXED:');
  print('================================');

  print('❌ PROBLEM:');
  print('   - loadState() loaded data correctly');
  print('   - State was set: _state = validatedState');
  print('   - BUT UI never updated!');
  print('   - Missing notifyListeners() call');

  print('');
  print('💡 SYMPTOMS:');
  print('   - Save: 3 cards, table mode, focus mode ON');
  print('   - Restart app');
  print('   - UI shows: 1 card, card mode, focus mode OFF');
  print('   - But logs show: 3 cards loaded correctly');

  print('');
  print('✅ SOLUTION:');
  print('   Added notifyListeners() after _state = validatedState');
  print('   This ensures UI rebuilds with loaded state');

  print('');
  print('🧪 TEST SEQUENCE:');
  print('1. Add multiple cards in Length Converter');
  print('2. Switch to Table view');
  print('3. Enable Focus Mode');
  print('4. Hot restart app');
  print('5. Check: All cards, table view, focus mode should persist!');
}