Maity: Board

Review PR #127 (web: mentions as member links, @ picker)

tsk-0v9d7ddfmgmd done chore Maity Review ChatGPT 001 (maity-review-chatgpt-001)

Independent review of https://github.com/oliver-zehentleitner/maity/pull/127 (agent D). Contract docs/api.md §8.6 mentions: stored as structured data with code-point offsets, only stored mentions of the field are rendered, text mismatch stays text, private-chat rule. Check offsets (UTF-16 vs code points!), XSS, the combobox a11y (arrow/Enter/Tab/Esc, aria-activedescendant), the member deep link #/p/<slug>/members/<id>, the chat hint wording, and whether the mock mirrors the hub. Deliver review_result to oz-agent-a.