fix: Actually trigger WebAuthn authentication

**Motivations :**
- Fix misleading 'Authentication completed successfully' message
- Ensure WebAuthn is actually triggered, not just pairing process
- Provide accurate status messages for WebAuthn operations

**Modifications :**
- Import secureCredentialsService directly in handleMainPairing
- Check for existing credentials and trigger appropriate WebAuthn flow
- Separate status messages for credential decryption vs creation
- Only show success message after actual WebAuthn completion

**Pages affectées :**
- src/pages/home/home.ts - Fixed WebAuthn triggering logic

src/pages/home/home.ts

@@ -558,13 +558,41 @@ async function handleMainPairing(): Promise<void> {
     if (mainStatus) {
       mainStatus.innerHTML = '<div class="spinner"></div><span>Authenticating with browser...</span>';
     }
-
-    // This will trigger the WebAuthn flow and create/decrypt credentials
-    await prepareAndSendPairingTx();
-
-    if (mainStatus) {
-      mainStatus.innerHTML = '<span style="color: var(--success-color)">✅ Authentication completed successfully</span>';
+    
+    // Import and trigger WebAuthn directly
+    const { secureCredentialsService } = await import('../../services/secure-credentials.service');
+    
+    // Check if we have existing credentials
+    const hasCredentials = await secureCredentialsService.hasCredentials();
+    
+    if (hasCredentials) {
+      console.log('🔓 Existing credentials found, decrypting...');
+      if (mainStatus) {
+        mainStatus.innerHTML = '<div class="spinner"></div><span>Decrypting existing credentials...</span>';
+      }
+      
+      // This will trigger WebAuthn for decryption
+      await secureCredentialsService.retrieveCredentials('');
+      
+      if (mainStatus) {
+        mainStatus.innerHTML = '<span style="color: var(--success-color)">✅ Credentials decrypted successfully</span>';
+      }
+    } else {
+      console.log('🔐 No existing credentials, creating new ones...');
+      if (mainStatus) {
+        mainStatus.innerHTML = '<div class="spinner"></div><span>Creating new credentials...</span>';
+      }
+      
+      // This will trigger WebAuthn for creation
+      await secureCredentialsService.generateSecureCredentials('');
+      
+      if (mainStatus) {
+        mainStatus.innerHTML = '<span style="color: var(--success-color)">✅ New credentials created successfully</span>';
+      }
     }
+    
+    // Now proceed with pairing process
+    await prepareAndSendPairingTx();
 
     // Re-enable button
     if (mainPairingButton) {