Make diff type switchable in the rendered html page.
We can use GitHub as an example:
贡献者指南
技术栈
typescriptjavascripthtmlcss
领域
frontend
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-2 days
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
JavaScriptHTML/CSSfamiliarity with diff2html
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
60
研究方向
Examine the main rendering module (likely src/diff2html.js or similar) to understand how diff lines are currently rendered. Look for a way to add a UI toggle that switches between unified and split views. Consider using GitHub's implementation as a reference. Check if there are any existing templates or configuration for diff types.
