- Capped block switches to 4 max so BYPASS and BANK are always visible
- Added LCD-style scribble strip display with dark background + border
- Added short abbreviated labels (GATE, OD, DST, etc.) in scribble strips
- Added proper BANK ▲/▼ navigation with bank letter (A-H)
- Added status LEDs on all block footswitches
- BlockChain.jsx: removed extra closing </div> that broke JSX parsing