Stands up the new onboarding login screen at a new route `/welcome-v2`,
as the foundation for the new onboarding flow (future PRs build the
post-login steps on top of it).
There is no feature flag: feature flags are per-workspace and read from
`currentWorkspaceState`, which is null on the pre-auth welcome screen,
so they can't cleanly gate it. A dedicated route is used instead.
`/welcome` is untouched and stays the default for logged-out users;
`/welcome-v2` is reachable only by navigating to it directly (nothing
links or redirects to it yet), so this is fully non-breaking.
The new page reuses all existing auth logic and behavior components
(`useSignInUp`, `useSignInUpForm`, step state, the
Google/Microsoft/credentials forms, `Logo`, `Title`, `ModalContent`) and
mirrors `SignInUp.tsx` almost exactly. The only intentional design delta
from today's screen is the footer wording, per Figma: "Data Processing
Agreement" (linking to `/legal/dpa`) instead of "Privacy Policy".
Notable:
- Added an optional `to` prop to the shared `Logo` (defaults to
`AppPath.SignInUp`, backward-compatible) so the logo on `/welcome-v2`
doesn't bounce users back to `/welcome`.
- The remaining changes are single-line additions to the pre-auth
allowlists next to the existing `AppPath.SignInUp` entries (router,
redirect guard, auth modal, metadata gater, captcha, page title, focus).
https://github.com/user-attachments/assets/abfc96ec-a87d-4608-b92a-87e2322e4874
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Raphaël Bosi
558e2e4107
