fix(onboarding): prefill verified email in a disabled field; bump SDK 0.2.4

- Onboarding reads the OAuth email (session-storage hint + live Supabase
  session via getUserEmail) so Continue is no longer disabled.
- Replace the empty 'Signed in as' banner with a disabled, prefilled
  email field (email is fixed — Google-verified).
- Stash the verified email at OAuth callback time for onboarding prefill.
- Bump @abe-kap/appshell-sdk to ^0.2.4 (getUserEmail via getSession).

src/components/portal/login-flow.tsx

@@ -24,7 +24,7 @@ const EMAIL_RE = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
 
 export function LoginFlow() {
   const router = useRouter();
-  const { login, loginWithOAuth, completeOAuthLogin } = useAuth();
+  const { login, loginWithOAuth, completeOAuthLogin, getUserEmail } = useAuth();
   const { ready, sdk } = useAppShell();
   const [step, setStep] = useState<Step>("identify");
   const [email, setEmail] = useState("");
@@ -86,13 +86,16 @@ export function LoginFlow() {
           registered = !!st?.registered;
         } catch { registered = false; }
         window.history.replaceState({}, "", "/portal/login");
-        router.replace(registered ? "/dashboard" : "/portal/onboarding");
+        if (registered) { router.replace("/dashboard"); return; }
+        // Capture the verified email now (session is fresh) so onboarding prefills it.
+        try { const em = await getUserEmail(); if (em) sessionStorage.setItem("onboard_email", em); } catch { /* ignore */ }
+        router.replace("/portal/onboarding");
       })
       .catch(() => {
         setFlash("Google sign-in didn't complete. Please try again.");
         replace("identify");
       });
-  }, [ready, completeOAuthLogin, router, sdk]);
+  }, [ready, completeOAuthLogin, router, sdk, getUserEmail]);
 
   /* ---- auth resolution ---- */
   function afterAuth(factor: "password" | "passkey" | "otp" | "totp" | "push" | "social") {