Once the TREK project has a client id registered with OpenAI, the sign-in
goes out with the relay page as its redirect address and the install's own
settings in its state; the relay sends the browser back there and the
settings finish the sign-in, nothing to paste. The relay sees the code but
cannot redeem it without the install's PKCE verifier. Without the project's
client id, or for an install without an https address, the loopback page
and the pasted address stay as they are.
relay/chatgpt-callback/index.html is the page to publish.
Maurice
f8e29dd218