🎯 Major Features Added:
- Snap to grid functionality (20x20 grid, default enabled)
- Tidy Up button for instant node reorganization
- Copy node values with one-click clipboard integration
- HTML rendering toggle (render/raw modes for HTML content)
- Accordion-style collapsible panels (Controls & Legend)
- Automatic fitView on fullscreen toggle with smooth animations
🎨 UI/UX Improvements:
- Professional accordion layout with exclusive panel opening
- Consistent button alignment and styling across all controls
- Legend moved to top-right with icon+color indicators
- Vertical button stack: Controls → Legend → Tidy Up → Fullscreen
- Smooth transitions and hover effects throughout
- Clean, uncluttered interface with folded panels by default
🔧 Technical Enhancements:
- Fixed ResizeObserver errors with proper error handling
- Optimized React rendering with memo and useCallback
- Debounced DOM updates to prevent infinite loops
- React Flow instance management for programmatic control
- Removed redundant Raw Input button for cleaner interface
🚀 Performance & Stability:
- Error boundary implementation for ResizeObserver issues
- Proper cleanup of event listeners and timeouts
- Memoized components to prevent unnecessary re-renders
- Smooth 300ms animations for all state transitions
- Fixed StructuredEditor auto-type detection to only trigger on empty fields
- Made array keys readonly with proper index display and full-width value inputs
- Enhanced PHP unserialize to handle empty strings, NULL values, and complex data
- Added JSON to CSV support for single objects as Key-Value format
- Upgraded DiffTool with react-diff-view for professional GitHub-style diffs
- Added theme-synchronized diff colors with proper contrast in light/dark modes
- Implemented red/green text on matching backgrounds for optimal readability
- Removed HTML Preview Tool from navigation menu in Layout.js
- Cleaned up unused Code import
- Added HTML Preview related files to .gitignore
- Project builds successfully without HTML Preview Tool
