Collapse the per-provider login buttons into one "Sign in with SSO" entry. With a
single configured provider it launches straight through; with several it opens a
native ModalBottomSheet picker (driven by the discovery list the app already
fetches — no website chooser page, no Google SDK). Each row opens the Custom-Tab
bridge for that provider.
Also make the login screen dismiss reliably after any sign-in: the LOGIN
destination now pops as soon as the shared session becomes SignedIn, not only via
the login VM's local flag — the deep-link/recomposition timing of the Custom-Tab
return could otherwise leave the login screen up even though the session was
established.
Verified on emulator with two providers: the picker lists both, completing SSO via
one signs in and returns to Home (exchange 200, session persisted). lint + build green.
Co-Authored-By: Claude <noreply@anthropic.com>
wtclaude
422892f1ed