Remove deprecated Passkey-related documentation and test files

This commit deletes several files related to Passkey functionality, including CORS_TEST_ANLEITUNG.md, CROSS_DEVICE_DEBUG.md, CROSS_DEVICE_PROBLEM_ZUSAMMENFASSUNG.md, SMARTPHONE_TEST_ANLEITUNG.md, test-cors.html, test-smartphone.html, and Vue components for Passkey registration and recovery. These removals are part of a broader effort to streamline the codebase and focus on core authentication methods while Passkey support is under review.

server/middleware/log-requests.js

@@ -12,6 +12,7 @@ export default defineEventHandler((event) => {
   const ip = getHeader(event, 'x-forwarded-for') || getHeader(event, 'x-real-ip') || 'unknown'
   
   // Logge nur Passkey-relevante Endpoints (um Logs nicht zu überfluten)
+  // Passkey-Endpoints vorläufig deaktiviert
   const passkeyEndpoints = [
     '/api/auth/register-passkey',
     '/api/auth/register-passkey-options',
@@ -19,8 +20,8 @@ export default defineEventHandler((event) => {
     '/api/auth/passkeys/register',
     '/api/auth/passkeys/authentication-options',
     '/api/auth/passkeys/login',
-    '/api/auth/passkeys/recovery',
-    '/passkey-register-cross-device'
+    '/api/auth/passkeys/recovery'
+    // '/passkey-register-cross-device' - Seite gelöscht
   ]
   
   // Logge auch alle Requests vom Smartphone (Mobile User-Agent)