refactor: move passkey enrollment to sign-in UI via Experience API

Remove the SaaS backend proxy approach for passkey registration (Account
API binding, Management API proxy, password modal in PasskeySection).
Instead, offer passkey enrollment natively during sign-in via Logto's
Experience API — the correct architectural layer.

Sign-in flow: when Logto returns MFA enrollment available (422), show a
"Secure your account" screen with Register passkey / Set up later. Uses
Experience API WebAuthn registration endpoints. Works for all users
(SaaS and future server users) since the sign-in UI is shared.

PasskeySection in account settings now only manages existing passkeys
(list/rename/delete) and directs users to register during sign-in.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/main/java/net/siegeln/cameleer/saas/account/AccountController.java

@@ -103,17 +103,6 @@ public class AccountController {
         return ResponseEntity.noContent().build();
     }
 
-    // --- WebAuthn bind (proxied via Management API since Account API /my-account/ returns 401) ---
-
-    record WebAuthnBindRequest(String verificationRecordId, String identityVerificationId) {}
-
-    @PostMapping("/mfa/webauthn/bind")
-    public ResponseEntity<Void> bindWebAuthn(@AuthenticationPrincipal Jwt jwt,
-                                              @RequestBody WebAuthnBindRequest request) {
-        accountService.bindWebAuthnPasskey(jwt.getSubject(), request.verificationRecordId(), request.identityVerificationId());
-        return ResponseEntity.noContent().build();
-    }
-
     // --- MFA Preference ---
 
     @PostMapping("/mfa/method-preference")

src/main/java/net/siegeln/cameleer/saas/account/AccountService.java

@@ -150,10 +150,6 @@ public class AccountService {
         }
     }
 
-    public void bindWebAuthnPasskey(String userId, String verificationRecordId, String identityVerificationId) {
-        logtoClient.bindWebAuthnMfa(userId, verificationRecordId, identityVerificationId);
-    }
-
     // --- Passkeys ---
 
     public List<PasskeyCredential> listPasskeys(String userId) {

src/main/java/net/siegeln/cameleer/saas/config/LogtoStartupConfig.java

@@ -13,8 +13,8 @@ import java.util.List;
 import java.util.Map;
 
 /**
- * Syncs Logto configuration on startup: enables the Account Center
- * and ensures MFA factors (including WebAuthn) match the vendor policy.
+ * Syncs Logto configuration on startup: ensures MFA factors
+ * (including WebAuthn) match the vendor policy.
  */
 @Component
 public class LogtoStartupConfig {
@@ -32,7 +32,6 @@ public class LogtoStartupConfig {
 
     @EventListener(ApplicationReadyEvent.class)
     public void onStartup() {
-        logtoClient.enableAccountCenter();
         syncMfaFactors();
     }
 

src/main/java/net/siegeln/cameleer/saas/identity/LogtoManagementClient.java

@@ -653,40 +653,6 @@ public class LogtoManagementClient {
         }
     }
 
-    /** Bind a WebAuthn passkey to a user via the Management API. */
-    public void bindWebAuthnMfa(String userId, String verificationRecordId, String identityVerificationId) {
-        if (!isAvailable()) throw new IllegalStateException("Logto not configured");
-        restClient.post()
-            .uri(config.getLogtoEndpoint() + "/api/users/" + userId + "/mfa-verifications")
-            .header("Authorization", "Bearer " + getAccessToken())
-            .contentType(MediaType.APPLICATION_JSON)
-            .body(Map.of("type", "WebAuthn", "verificationRecordId", verificationRecordId))
-            .retrieve()
-            .toBodilessEntity();
-    }
-
-    /** Enable the Account Center API for MFA management (WebAuthn passkey registration). */
-    public void enableAccountCenter() {
-        if (!isAvailable()) return;
-        try {
-            restClient.patch()
-                .uri(config.getLogtoEndpoint() + "/api/account-center")
-                .header("Authorization", "Bearer " + getAccessToken())
-                .contentType(MediaType.APPLICATION_JSON)
-                .body(Map.of(
-                        "enabled", true,
-                        "fields", Map.of(
-                                "mfa", "Edit"
-                        )
-                ))
-                .retrieve()
-                .toBodilessEntity();
-            log.info("Account Center enabled for MFA management");
-        } catch (Exception e) {
-            log.warn("Failed to enable Account Center: {}", e.getMessage());
-        }
-    }
-
     /** Update user custom data (partial merge). Used for mfa_method_preference. */
     public void updateUserCustomData(String userId, Map<String, Object> customData) {
         if (!isAvailable()) return;

ui/sign-in/src/SignInPage.tsx

@@ -2,17 +2,19 @@ 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 { startAuthentication } from '@simplewebauthn/browser';
+import { startAuthentication, startRegistration as startWebAuthnReg } from '@simplewebauthn/browser';
 import {
   signIn, startRegistration, completeRegistration,
   startForgotPassword, forgotPasswordVerifyAndReset,
   verifyTotp, verifyBackupCode, submitMfa,
   startWebAuthnAuth, verifyWebAuthnAuth,
-  MfaRequiredError,
+  startWebAuthnRegistration, verifyWebAuthnRegistration, bindMfaProfile,
+  skipMfaEnrollment, submitInteraction,
+  MfaRequiredError, MfaEnrollmentError,
 } from './experience-api';
 import styles from './SignInPage.module.css';
 
-type Mode = 'signIn' | 'register' | 'verifyCode' | 'forgotPassword' | 'forgotPasswordVerify' | 'mfaVerify' | 'mfaBackupCode' | 'mfaWebauthn' | 'mfaMethodPicker';
+type Mode = 'signIn' | 'register' | 'verifyCode' | 'forgotPassword' | 'forgotPasswordVerify' | 'mfaVerify' | 'mfaBackupCode' | 'mfaWebauthn' | 'mfaMethodPicker' | 'mfaEnroll';
 
 const SIGN_IN_SUBTITLES = [
   "Prove you're not a mirage",
@@ -137,6 +139,11 @@ export function SignInPage() {
         setLoading(false);
         return;
       }
+      if (err instanceof MfaEnrollmentError) {
+        setMode('mfaEnroll');
+        setLoading(false);
+        return;
+      }
       setError(err instanceof Error ? err.message : 'Sign-in failed');
       setLoading(false);
     }
@@ -179,6 +186,11 @@ export function SignInPage() {
       const redirectTo = await completeRegistration(identifier, password, verificationId, code);
       window.location.replace(redirectTo);
     } catch (err) {
+      if (err instanceof MfaEnrollmentError) {
+        setMode('mfaEnroll');
+        setLoading(false);
+        return;
+      }
       setError(err instanceof Error ? err.message : 'Verification failed');
       setLoading(false);
     }
@@ -293,6 +305,38 @@ export function SignInPage() {
     }
   };
 
+  // --- MFA enrollment: passkey registration ---
+  async function handleEnrollPasskey() {
+    setError(null);
+    setLoading(true);
+    try {
+      const { verificationId, registrationOptions } = await startWebAuthnRegistration();
+      const credential = await startWebAuthnReg({ optionsJSON: registrationOptions as any });
+      const verifiedId = await verifyWebAuthnRegistration(verificationId, credential as unknown as Record<string, unknown>);
+      await bindMfaProfile('WebAuthn', verifiedId);
+      const result = await submitInteraction();
+      window.location.replace(result);
+    } catch (err) {
+      if (err instanceof Error && err.name === 'NotAllowedError') {
+        setLoading(false);
+        return;
+      }
+      setError(err instanceof Error ? err.message : 'Passkey registration failed');
+      setLoading(false);
+    }
+  }
+
+  async function handleSkipEnrollment() {
+    setLoading(true);
+    try {
+      const redirectTo = await skipMfaEnrollment();
+      window.location.replace(redirectTo);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to continue');
+      setLoading(false);
+    }
+  }
+
   const passwordToggle = (
     <button
       type="button"
@@ -713,6 +757,27 @@ export function SignInPage() {
               </div>
             </div>
           )}
+
+          {/* --- MFA enrollment: offer passkey registration --- */}
+          {mode === 'mfaEnroll' && (
+            <div className={styles.fields}>
+              <div style={{ textAlign: 'center', marginBottom: 16 }}>
+                <h2 style={{ margin: '0 0 8px', fontSize: '1.25rem' }}>Secure your account</h2>
+                <p style={{ color: 'var(--text-muted)', margin: 0, fontSize: '0.875rem' }}>
+                  Add a passkey to sign in faster with your fingerprint, face, or security key.
+                </p>
+              </div>
+              {error && <Alert variant="error">{error}</Alert>}
+              <div style={{ display: 'flex', flexDirection: 'column', gap: 12 }}>
+                <Button variant="primary" onClick={handleEnrollPasskey} loading={loading}>
+                  Register passkey
+                </Button>
+                <Button variant="secondary" onClick={handleSkipEnrollment} disabled={loading}>
+                  Set up later
+                </Button>
+              </div>
+            </div>
+          )}
         </div>
       </Card>
     </div>

ui/sign-in/src/experience-api.ts

@@ -71,6 +71,13 @@ export class MfaRequiredError extends Error {
   }
 }
 
+export class MfaEnrollmentError extends Error {
+  constructor() {
+    super('MFA enrollment available');
+    this.name = 'MfaEnrollmentError';
+  }
+}
+
 async function trySubmit(): Promise<{ ok: true; redirectTo: string } | { ok: false; status: number; code: string; message: string }> {
   const res = await request('POST', '/submit');
   if (res.ok) {
@@ -97,13 +104,9 @@ export async function signIn(identifier: string, password: string): Promise<stri
     throw new MfaRequiredError();
   }
 
-  // MFA not enrolled, UserControlled policy — skip the binding prompt.
-  // Also fallback: any 422 with an MFA-related code we don't recognize — try skip before failing.
+  // MFA not enrolled — offer enrollment (passkey / TOTP)
   if (result.status === 422 && result.code.includes('mfa')) {
-    await skipMfaBinding();
-    const retry = await trySubmit();
-    if (retry.ok) return retry.redirectTo;
-    throw new Error(retry.message);
+    throw new MfaEnrollmentError();
   }
 
   throw new Error(result.message);
@@ -184,12 +187,9 @@ export async function completeRegistration(
   const result = await trySubmit();
   if (result.ok) return result.redirectTo;
 
-  // MFA not enrolled, UserControlled policy — skip the binding prompt
+  // MFA not enrolled — offer enrollment (passkey / TOTP)
   if (result.status === 422 && result.code.includes('mfa')) {
-    await skipMfaBinding();
-    const retry = await trySubmit();
-    if (retry.ok) return retry.redirectTo;
-    throw new Error(retry.message);
+    throw new MfaEnrollmentError();
   }
 
   throw new Error(result.message);
@@ -299,3 +299,40 @@ export async function verifyWebAuthnAuth(payload: Record<string, unknown>): Prom
   const data = await res.json();
   return data.verificationId;
 }
+
+// --- MFA Enrollment (during sign-in) ---
+
+export async function startWebAuthnRegistration(): Promise<{ verificationId: string; registrationOptions: Record<string, unknown> }> {
+  const res = await request('POST', '/verification/web-authn/registration');
+  if (!res.ok) {
+    const err = await res.json().catch(() => ({}));
+    throw new Error(err.message || `Failed to start passkey registration (${res.status})`);
+  }
+  return res.json();
+}
+
+export async function verifyWebAuthnRegistration(verificationId: string, payload: Record<string, unknown>): Promise<string> {
+  const body = { ...payload, type: 'WebAuthn' };
+  const res = await request('POST', '/verification/web-authn/registration/verify', { verificationId, payload: body });
+  if (!res.ok) {
+    const err = await res.json().catch(() => ({}));
+    throw new Error(err.message || `Passkey registration verification failed (${res.status})`);
+  }
+  const data = await res.json();
+  return data.verificationId;
+}
+
+export async function bindMfaProfile(type: string, verificationId: string): Promise<void> {
+  const res = await request('POST', '/profile/mfa', { type, verificationId });
+  if (!res.ok) {
+    const err = await res.json().catch(() => ({}));
+    throw new Error(err.message || `Failed to bind MFA (${res.status})`);
+  }
+}
+
+export async function skipMfaEnrollment(): Promise<string> {
+  await skipMfaBinding();
+  const result = await trySubmit();
+  if (result.ok) return result.redirectTo;
+  throw new Error(result.message);
+}

ui/src/api/logto-account-api.ts

@@ -1,83 +0,0 @@
-import { startRegistration } from '@simplewebauthn/browser';
-import { api } from './client';
-
-/**
- * Logto Account API client for WebAuthn passkey registration.
- * Calls Logto's Account API endpoints directly (same domain).
- * The bind step goes through the SaaS backend (Management API).
- */
-
-async function accountApi(
-  method: string,
-  path: string,
-  token: string,
-  body?: unknown,
-  extraHeaders?: Record<string, string>,
-): Promise<Response> {
-  return fetch(`/api${path}`, {
-    method,
-    headers: {
-      Authorization: `Bearer ${token}`,
-      ...(body ? { 'Content-Type': 'application/json' } : {}),
-      ...extraHeaders,
-    },
-    body: body ? JSON.stringify(body) : undefined,
-  });
-}
-
-/** Verify user's password via Account API. Returns a verification record ID. */
-export async function verifyPassword(
-  token: string,
-  password: string,
-): Promise<string> {
-  const res = await accountApi('POST', '/verifications/password', token, { password });
-  if (!res.ok) {
-    const err = await res.json().catch(() => ({}));
-    throw new Error(err.message || 'Password verification failed');
-  }
-  const data = await res.json();
-  return data.verificationRecordId;
-}
-
-/** Full passkey registration flow: verify password → WebAuthn ceremony → bind. */
-export async function registerPasskey(
-  getAccountToken: () => Promise<string>,
-  password: string,
-): Promise<void> {
-  const token = await getAccountToken();
-
-  // Step 1: Verify password for sensitive operation
-  const identityVerificationId = await verifyPassword(token, password);
-
-  // Step 2: Get registration options from Logto Account API
-  const optionsRes = await accountApi('POST', '/verifications/web-authn/registration', token);
-  if (!optionsRes.ok) {
-    const err = await optionsRes.json().catch(() => ({}));
-    throw new Error(err.message || `Failed to start passkey registration (${optionsRes.status})`);
-  }
-  const { registrationOptions, verificationRecordId } = await optionsRes.json();
-
-  // Step 3: Browser WebAuthn ceremony
-  const credential = await startRegistration({ optionsJSON: registrationOptions });
-
-  // Step 4: Verify the registration with Logto
-  const verifyRes = await accountApi(
-    'POST',
-    '/verifications/web-authn/registration/verify',
-    token,
-    { verificationRecordId, payload: { ...credential, type: 'WebAuthn' } },
-  );
-  if (!verifyRes.ok) {
-    const err = await verifyRes.json().catch(() => ({}));
-    throw new Error(err.message || `Passkey verification failed (${verifyRes.status})`);
-  }
-  const verifyData = await verifyRes.json();
-  const verifiedRecordId = verifyData.verificationRecordId;
-
-  // Step 5: Bind via SaaS backend (Management API) — Logto's /api/my-account/
-  // rejects the opaque token, so we proxy through our backend.
-  await api.post('/account/mfa/webauthn/bind', {
-    verificationRecordId: verifiedRecordId,
-    identityVerificationId,
-  });
-}

ui/src/components/account/PasskeySection.tsx

@@ -1,13 +1,10 @@
 import { useState } from 'react';
-import { useLogto } from '@logto/react';
 import { errorMessage } from '../../api/client';
 import {
   Alert,
   Button,
   Card,
-  FormField,
   Input,
-  Modal,
   useToast,
 } from '@cameleer/design-system';
 import {
@@ -16,7 +13,6 @@ import {
   useAccountRenamePasskey,
   useAccountDeletePasskey,
 } from '../../api/account-hooks';
-import { registerPasskey } from '../../api/logto-account-api';
 import styles from '../../styles/platform.module.css';
 
 export function PasskeyNudgeBanner() {
@@ -45,17 +41,12 @@ export function PasskeyNudgeBanner() {
 
 export function PasskeySection() {
   const { toast } = useToast();
-  const { getAccessToken } = useLogto();
-  const { data: passkeys, isLoading, refetch } = useAccountPasskeyList();
+  const { data: passkeys, isLoading } = useAccountPasskeyList();
   const renamePasskey = useAccountRenamePasskey();
   const deletePasskey = useAccountDeletePasskey();
   const [editingId, setEditingId] = useState<string | null>(null);
   const [editName, setEditName] = useState('');
   const [confirmDeleteId, setConfirmDeleteId] = useState<string | null>(null);
-  const [registering, setRegistering] = useState(false);
-  const [showPasswordModal, setShowPasswordModal] = useState(false);
-  const [regPassword, setRegPassword] = useState('');
-  const [regError, setRegError] = useState<string | null>(null);
 
   function parseAgent(agent: string | null): string {
     if (!agent) return 'Unknown device';
@@ -81,37 +72,6 @@ export function PasskeySection() {
     }
   }
 
-  function openRegister() {
-    setRegPassword('');
-    setRegError(null);
-    setShowPasswordModal(true);
-  }
-
-  async function handleRegister(e: React.FormEvent) {
-    e.preventDefault();
-    setRegError(null);
-    setRegistering(true);
-    try {
-      await registerPasskey(async () => {
-        const token = await getAccessToken();
-        if (!token) throw new Error('Not authenticated');
-        return token;
-      }, regPassword);
-      setShowPasswordModal(false);
-      await refetch();
-      toast({ title: 'Passkey registered', variant: 'success' });
-    } catch (err) {
-      // User cancelled the WebAuthn prompt — not an error
-      if (err instanceof Error && err.name === 'NotAllowedError') {
-        setRegistering(false);
-        return;
-      }
-      setRegError(errorMessage(err));
-    } finally {
-      setRegistering(false);
-    }
-  }
-
   async function handleDelete(id: string) {
     try {
       await deletePasskey.mutateAsync(id);
@@ -126,19 +86,13 @@ export function PasskeySection() {
   const credentials = passkeys ?? [];
 
   return (
-    <>
     <Card title="Passkeys">
       <p className={styles.description} style={{ marginTop: 0 }}>
         Use your fingerprint, face, or security key to sign in faster.
       </p>
-      <div style={{ marginBottom: 12 }}>
-        <Button variant="primary" onClick={openRegister}>
-          Register passkey
-        </Button>
-      </div>
       {credentials.length === 0 ? (
         <p style={{ color: 'var(--text-muted)', fontSize: '0.875rem' }}>
-          No passkeys registered yet.
+          No passkeys registered. You can register a passkey during sign-in.
         </p>
       ) : (
         <div style={{ display: 'flex', flexDirection: 'column', gap: 12 }}>
@@ -178,39 +132,5 @@ export function PasskeySection() {
         </div>
       )}
     </Card>
-
-    <Modal
-      open={showPasswordModal}
-      onClose={() => { if (!registering) setShowPasswordModal(false); }}
-      title="Confirm identity"
-      size="sm"
-    >
-      <p className={styles.description} style={{ marginTop: 0 }}>
-        Enter your password to register a new passkey.
-      </p>
-      {regError && <Alert variant="error">{regError}</Alert>}
-      <form onSubmit={handleRegister} style={{ display: 'flex', flexDirection: 'column', gap: 16 }}>
-        <FormField label="Password" htmlFor="passkey-reg-password">
-          <Input
-            id="passkey-reg-password"
-            type="password"
-            value={regPassword}
-            onChange={(e) => setRegPassword(e.target.value)}
-            placeholder="Enter your password"
-            autoFocus
-            autoComplete="current-password"
-          />
-        </FormField>
-        <div style={{ display: 'flex', gap: 8 }}>
-          <Button type="submit" variant="primary" loading={registering} disabled={!regPassword}>
-            Continue
-          </Button>
-          <Button type="button" variant="secondary" onClick={() => setShowPasswordModal(false)} disabled={registering}>
-            Cancel
-          </Button>
-        </div>
-      </form>
-    </Modal>
-    </>
   );
 }