Fix mobile account session selection

app/(auth)/sign-in.tsx

@@ -18,13 +18,14 @@ import { useAuthClient } from "@/contexts/AuthContext";
 import { useAppTheme } from "@/contexts/ThemeContext";
 import { fetchAuthCapabilities } from "@/lib/auth-capabilities";
 import { signInWithAuthentik } from "@/lib/auth-oauth";
+import { prepareAuthScreenSession } from "@/lib/auth-session";
 import { completeSignInAfterAuth } from "@/lib/complete-sign-in";
 import { formatAuthErrorMessage } from "@/lib/trpc-errors";
 import { isRequiredString, isValidEmail, useFieldVisibility } from "@/lib/form-validation";
 
 export default function SignInScreen() {
   const authClient = useAuthClient();
-  const { apiUrl, activeAccountId, registerAccount } = useAccounts();
+  const { apiUrl, activeAccountId, clearActiveAccount, registerAccount } = useAccounts();
   const { colors } = useAppTheme();
   const [email, setEmail] = useState("");
   const [password, setPassword] = useState("");
@@ -35,6 +36,10 @@ export default function SignInScreen() {
   const [signupsDisabled, setSignupsDisabled] = useState(false);
   const { touch, visible, markSubmitted } = useFieldVisibility();
 
+  useEffect(() => {
+    void prepareAuthScreenSession(authClient, activeAccountId, clearActiveAccount);
+  }, [authClient, activeAccountId, clearActiveAccount]);
+
   useEffect(() => {
     let cancelled = false;