Match the literal copy the TikTok app reviewer looks for during the
Content Posting API audit, per the Mixpost playbook (the only public
account of how to pass).
- Privacy dropdown placeholder: "Select who can view this post"
- Tooltip on interaction toggles disabled by creator: "Turned off in
your TikTok account settings"
- Render the "may take a few minutes" notice that was translated but
never displayed (processing_hint)
Mirror both i18n changes in pt-BR and es. Add a feature test that locks
the literal strings so they cannot drift before the next review cycle.
