* fix(oauth): show GitLab Duo setup before authorize error
Surface the OAuth app registration and env-var recipe in the Add
Connection modal before auto-starting authorize, and keep the same
shared copy for catalog authHint and the authorize fallback (#8688).
* fix(oauth): keep OAuthModal under file-size baseline for #8688
Extract waiting/error panels so the GitLab Duo setup step does not
trip the Fast Quality Gates file-size ratchet, and update the retry
Button regression guard for the extracted error step.
