Docs gap

The FAQ section "Linux: AppImage Opens but Buttons or Keyboard Do Not Work on Wayland" exists in the body of both docs/faq.md and docs/faq_CN.md, but it is missing from the Build Issues table of contents in each file. The TOC jumps straight from the WebKitNetworkProcess entry to the cargo: command not found entry, so readers scanning the TOC can't discover or jump to the Wayland troubleshooting section.

Repro

grep -nE '^### .*Wayland' docs/faq.md        # heading exists in the body
sed -n '9,18p' docs/faq.md                   # ...but not listed in the TOC

Fix

Add the missing TOC entry in both languages, pointing at the correct GitHub heading anchor. PR attached.