fix: add missing passkey flags to make icloud passkeys work

backend/internal/model/user.go

@@ -35,6 +35,10 @@ func (u User) WebAuthnCredentials() []webauthn.Credential {
 			AttestationType: credential.AttestationType,
 			PublicKey:       credential.PublicKey,
 			Transport:       credential.Transport,
+			Flags: webauthn.CredentialFlags{
+				BackupState:    credential.BackupState,
+				BackupEligible: credential.BackupEligible,
+			},
 		}
 
 	}

backend/internal/model/webauthn.go

@@ -25,6 +25,9 @@ type WebauthnCredential struct {
 	AttestationType string                     `json:"attestationType"`
 	Transport       AuthenticatorTransportList `json:"-"`
 
+	BackupEligible bool `json:"backupEligible"`
+	BackupState    bool `json:"backupState"`
+
 	UserID string
 }