fix: improve CI/CD quality checks and fix ESLint configuration

Frontend fixes:
- Add eslint-config-next package to devDependencies
- Update Jenkinsfile to block deployments on failed lint/tests
- Add proper error handling for quality checks

This ensures that the deployment only proceeds when all quality
checks pass successfully, preventing broken code from being deployed.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Jenkinsfile

@@ -75,11 +75,20 @@ pipeline {
             }
             steps {
                 echo "🧪 Lancement des tests et analyse du code..."
-                sh '''
-                    npm ci
-                    npm run lint || echo "⚠️ Erreurs ESLint détectées"
-                    npm test || echo "⚠️ Tests échoués — à vérifier"
-                '''
+                script {
+                    def lintStatus = sh(script: 'npm ci && npm run lint', returnStatus: true)
+                    def testStatus = sh(script: 'npm test', returnStatus: true)
+
+                    if (lintStatus != 0) {
+                        error "❌ ESLint a échoué - Le déploiement est bloqué"
+                    }
+
+                    if (testStatus != 0) {
+                        error "❌ Les tests ont échoué - Le déploiement est bloqué"
+                    }
+
+                    echo "✅ Tests et lint passés avec succès"
+                }
             }
         }
 

package.json

@@ -31,6 +31,7 @@
     "@types/react": "19.2.2",
     "autoprefixer": "^10.4.21",
     "eslint": "^9.39.1",
+    "eslint-config-next": "14.2.4",
     "eslint-plugin-react": "^7.37.5",
     "globals": "^16.5.0",
     "jiti": "^2.6.1",