Verbessere Codequalität und Sicherheit durch Refactoring, Hinzufügen von ESLint-Regeln und Aktualisierung der OSV-Scanner-Konfiguration

pages/registrieren.vue

@@ -394,7 +394,6 @@ const formData = ref({
 const isLoading = ref(false)
 const errorMessage = ref('')
 const successMessage = ref('')
-const usePasskey = ref(false)
 const isPasskeySupported = ref(false)
 const passkeySupportReason = ref('')
 const setPasswordForPasskey = ref(true)
@@ -424,7 +423,6 @@ const handleFormSubmit = (event) => {
   // console.log('[DEBUG] Calling handleRegister...')
   handleRegister()
 }
-const showDebugInfo = ref(false)
 const debugChallenge = ref('')
 const debugRpId = ref('')
 const debugRegistrationId = ref('')
@@ -697,8 +695,6 @@ const handleRegisterWithPasskey = async () => {
       debugSmartphoneUrl.value = `${window.location.origin}/passkey-register-cross-device?registrationId=${pre.registrationId}`
     }
     
-    showDebugInfo.value = true
-    
     console.log('[DEBUG] QR-Code Info (for Cross-Device):', {
       challenge: pre.options?.challenge,
       challengeLength: pre.options?.challenge?.length,