Explore the Luckysheet rendering code, particularly the cell drawing functions (likely in src/ or src/components/). Understand how cell borders and backgrounds are rendered. Determine if diagonal lines can be added as a new property or drawn over the cell. Consider implementing via CSS or canvas depending on the rendering approach. Test with a simple implementation and propose a design.
[Feature request]单位格对角线 · dream-num/Luckysheet#445 | Good First Issue