--tokens FILE gates session hosting: hosts present an access code, patients
join live sessions freely (no code), un-joined connections can't relay, and
joined members can't spoof state into other rooms. Easy Mode grows a gentle
access-code card (one-computer mode stays free/ungated); advanced panel gets
a token field; patient view shows a waiting note and auto-retries.
manual.html: picture-book how-to, images slot in under img/manual/.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
