* Replace token-link email with 6-digit code on SSO registration
Unverified SSO emails previously received a long-lived token link
(90-day TTL) via UserEmailsConfirmationHandler. This replaces that
flow with the same 6-digit code verification used for password
registration, redirecting through /registration/confirm-email.
- SSOManager.registerSSO now always confirms email (caller must
verify first); removes sendConfirmationEmail / _finishRegistration
- SSOController._signUp sends confirmation code and stores
pendingSSORegistration in session when IdP email_verified is false
- New SSOConfirmEmailHandler completes registration after code check
via completeSSOEmailConfirmation module hook
- OnboardingController confirm-email handlers accept
pendingSSORegistration alongside pendingUserRegistration
confirmEmailFromToken (POST /user/emails/confirm) removal is deferred
to a follow-up PR to avoid breaking in-flight 90-day tokens.
Closes#28607
* Fix unverified-email edge cases; Add ORCID e2e tests;
* Rename `confirmEmail` parameter to `emailVerifiedByIdP` in _signUp function
* Remove `sendConfirmationEmail`
* Mock getUserByAnyEmail in tests
* Extract _finishSSORegistration helper to deduplicate the register →
set session flags → allocate referral → finishSaasLogin → finishLogin
sequence shared by both the direct and deferred (code-confirmed) paths.
* Stop duplicating session data in pendingSSORegistration
analyticsId, splitTests, and referal_* are already in the session at
confirmation time — no need to copy them into pendingSSORegistration.
Re-fetch splitTests fresh on completion instead.
* Simplify the code
* Remove dead confirmEmail template
No callers remain after sendConfirmationEmail was deleted. The token-link
flow (confirmEmailFromToken) only validates tokens, never sends email.
* Remove dead reconfirmEmail template
* Address comments from Copilot
* Clear stale pending registration when starting a new flow
* Add unit tests for completeSSOEmailConfirmation
* Add `verificationMethod` param
* Fix camelcase issues
* Extract _createSSOUser and _registerAndFinish helpers to deduplicate registration logic
* Remove obscure "registration_error"
* Prevent FormTextIcon from shrinking
* Enable "email_already_registered_sso" error
* Misc. improvements to confirm-email-form.tsx
* Remove `UserEmailsConfirmationHandler` mock
Co-authored-by: Olzhas Askar <olzhas.askar@overleaf.com>
* Add info on sso_email.pug page
---------
Co-authored-by: Olzhas Askar <olzhas.askar@overleaf.com>
GitOrigin-RevId: d0196ebc6d81ff61bcd27726d0b899b743d08d64
Antoine Clausse