disk: add aa to prompt-jump whitelist

aa.mjs is a chat.mjs inheritor with its own submit handler — Enter
needs to reach chat.mjs instead of being swallowed by disk.mjs's
global jump-back-to-prompt handler. Same treatment as chat,
laer-klokken, sign, jas.

Root cause of: "pressing enter is jumping me back to prompt" and
likely the "enter message box doesn't show all the time" report.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>