feat: add forgot-password and MFA verification Experience API functions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ui/sign-in/src/SignInPage.tsx

@@ -2,7 +2,12 @@ import { type FormEvent, useEffect, useMemo, useState } from 'react';
 import { Eye, EyeOff } from 'lucide-react';
 import { Card, Input, Button, Alert, FormField } from '@cameleer/design-system';
 import cameleerLogo from '@cameleer/design-system/assets/cameleer-logo.svg';
-import { signIn, startRegistration, completeRegistration } from './experience-api';
+import {
+  signIn, startRegistration, completeRegistration,
+  startForgotPassword, forgotPasswordVerifyAndReset,
+  verifyTotp, verifyBackupCode, submitMfa,
+  MfaRequiredError,
+} from './experience-api';
 import styles from './SignInPage.module.css';
 
 type Mode = 'signIn' | 'register' | 'verifyCode';