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/api/auth/passkeys/recovery/request.post.js

@@ -78,7 +78,9 @@ export default defineEventHandler(async (event) => {
     })
 
     const baseUrl = process.env.NUXT_PUBLIC_BASE_URL || 'http://localhost:3100'
-    const link = `${baseUrl}/passkey-wiederherstellen?token=${token}`
+    // Passkey-Wiederherstellungsseite vorläufig deaktiviert
+    // const link = `${baseUrl}/passkey-wiederherstellen?token=${token}`
+    const link = `${baseUrl}/login` // Fallback auf Login-Seite
 
     await transporter.sendMail({
       from: process.env.SMTP_FROM || 'noreply@harheimertc.de',