The start gate only refused early. The callback ignored the signed state's
mode, so a Joystick connect for StreamPixels redeemed into a viewer_access
session. callbackMint(profile, provider, mode) now decides at the callback:
identity providers keep a viewer session (Bifrost discord connect unchanged);
a connect for a managed-connection-only provider stores custody and mints a
claim with no facts, no capabilities and no refresh token (the refresh route
would recompute viewer_access from the account); anything else is refused.
StreamPixels' redeem reads only account, provider, mode, connection and
claimSet.identities, so it accepts the capability-free claim unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>