fix: restore services initialization in block-sync and remove remaining commented imports

**Motivations :**
- Corriger l'erreur de compilation dans block-sync.ts où services n'était plus défini
- Supprimer les derniers imports commentés restants

**Modifications :**
- Restaurer l'initialisation de Services dans block-sync.ts après les vérifications de prérequis
- Supprimer les imports commentés dans pairing.service.ts et iframe-pairing.service.ts

**Pages affectées :**
- src/pages/block-sync/block-sync.ts (restauration de l'initialisation Services)
- src/services/pairing.service.ts (supprime imports commentés)
- src/services/iframe-pairing.service.ts (supprime import commenté)

src/pages/block-sync/block-sync.ts

@@ -73,6 +73,50 @@ document.addEventListener("DOMContentLoaded", async () => {
             throw new Error('Wallet found but missing required data (sp_wallet or birthday)');
         }
 
+        // Étape 2: Initialisation des services
+        updateStatus('🔄 Initialisation des services...', 'loading');
+        updateProgress(20);
+
+        const { default: Services } = await import('../../services/service');
+        if (!Services) {
+            throw new Error('Services class not found in default export');
+        }
+
+        console.log('🔄 Waiting for services to be ready...');
+        let attempts = 0;
+        const maxAttempts = 30;
+        const delayMs = 2000;
+
+        let services;
+        while (attempts < maxAttempts) {
+            try {
+                console.log(`🔄 Attempting to get services (attempt ${attempts + 1}/${maxAttempts})...`);
+                services = await Services.getInstance();
+                console.log('✅ Services initialized successfully');
+                break;
+            } catch (error) {
+                const errorMessage = error instanceof Error ? error.message : String(error);
+                console.log(`⏳ Services not ready yet (attempt ${attempts + 1}/${maxAttempts}):`, errorMessage);
+
+                // Si c'est une erreur de mémoire, arrêter immédiatement
+                if (errorMessage.includes('Out of memory') || errorMessage.includes('insufficient memory')) {
+                    console.error('🚫 Memory error detected - stopping retry attempts');
+                    updateStatus('❌ Erreur: Mémoire insuffisante. Veuillez actualiser la page.', 'error');
+                    throw new Error('WebAssembly initialization failed due to insufficient memory. Please refresh the page.');
+                }
+
+                attempts++;
+                if (attempts >= maxAttempts) {
+                    throw new Error(`Services failed to initialize after ${maxAttempts} attempts.`);
+                }
+                await new Promise(resolve => setTimeout(resolve, delayMs));
+            }
+        }
+
+        if (!services) {
+            throw new Error('Services not initialized');
+        }
+
         // Vérifier que le birthday est configuré (> 0)
         if (!wallet.sp_wallet.birthday || wallet.sp_wallet.birthday === 0) {
             console.log('⚠️ Birthday not configured (birthday = 0), redirecting to birthday-setup...');

src/services/iframe-pairing.service.ts

@@ -1,7 +1,6 @@
 import { MessageType } from '../models/process.model';
 import Services from './service';
 import {
-  // generateWordsDisplay, // Unused import
   discoverAndJoinPairingProcessWithWords,
   prepareAndSendPairingTx,
 } from '../utils/sp-address.utils';

src/services/pairing.service.ts

@@ -2,12 +2,10 @@
  * PairingService - Service spécialisé pour le pairing
  * Gère la logique métier du pairing sans couplage direct
  */
-// import { Device } from '../../pkg/sdk_client';
 import { DeviceRepository } from '../repositories/device.repository';
 import { ProcessRepository } from '../repositories/process.repository';
 import { eventBus } from './event-bus';
 import { secureLogger } from './secure-logger';
-// import { secureKeyManager } from './secure-key-manager';
 import { SecureCredentialsService } from './secure-credentials.service';
 import { CredentialData } from './credentials/types';