Performance Optimizations

Improved

• Major performance improvements for large diagrams with 300+ cables (thanks Oscar!)
• Memoized sidebar, legend, and overlay components to prevent unnecessary re-renders
• Memoized ReactFlow props and event handlers for smoother canvas interactions
• Zoom-based optimizations - cable labels hidden when zoomed out for better performance
• Thinner cable strokes when zoomed out to reduce rendering overhead
• Removed drop-shadow filters from cables for faster rendering
• New Cables menu - cable filtering and legend controls moved from View menu
• Cable type visibility toggle - show/hide specific cable types on the canvas