Add optional KYC flow and service-backed account limits

frontend/app/lib/verification/page.dart

@@ -325,6 +325,13 @@ class _VerificationPageState extends State<VerificationPage> {
                         child: Text(l.verificationRequest),
                       ),
                     ],
+                    if (verified) ...[
+                      const SizedBox(height: 16),
+                      FilledButton(
+                        onPressed: () => context.goNamed(AppRoutes.identity),
+                        child: Text(l.kycPreview),
+                      ),
+                    ],
                     const SizedBox(height: 16),
                     TextButton(
                       onPressed: () => context.goNamed(AppRoutes.login),