fix: improve CI/CD quality checks and fix test/lint configuration

Backend fixes:
- Add eslint.config.js with proper ES6 module configuration
- Add jest.config.js to support ES modules
- Update package.json with @eslint/js dependency
- Configure npm test script with NODE_OPTIONS for ES modules
- Update Jenkinsfile to block deployments on failed lint/tests

This ensures:
1. ESLint works correctly with ES6 modules
2. Jest can run tests with ES6 imports
3. Deployments are blocked if quality checks fail

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

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

Jenkinsfile

@@ -77,11 +77,20 @@ pipeline {
             }
             steps {
                 echo "🧪 Lancement des tests et analyse..."
-                sh '''
-                    npm ci
-                    npm run lint || echo "⚠️ Erreurs de lint détectées"
-                    npm test || echo "⚠️ Tests échoués — ignorés pour le déploiement"
-                '''
+                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"
+                }
             }
         }
 

eslint.config.js

@@ -0,0 +1,36 @@
+import js from '@eslint/js';
+
+export default [
+  js.configs.recommended,
+  {
+    languageOptions: {
+      ecmaVersion: 2022,
+      sourceType: 'module',
+      globals: {
+        // Node.js globals
+        console: 'readonly',
+        process: 'readonly',
+        Buffer: 'readonly',
+        __dirname: 'readonly',
+        __filename: 'readonly',
+        global: 'readonly',
+        module: 'readonly',
+        require: 'readonly',
+        exports: 'writable',
+      },
+    },
+    rules: {
+      'no-unused-vars': ['warn', { argsIgnorePattern: '^_' }],
+      'no-console': 'off',
+      'no-undef': 'error',
+    },
+  },
+  {
+    ignores: [
+      'node_modules/**',
+      'dist/**',
+      'coverage/**',
+      '*.config.js',
+    ],
+  },
+];

jest.config.js

@@ -0,0 +1,37 @@
+export default {
+  // Use Node's experimental ESM support
+  testEnvironment: 'node',
+
+  // Transform ES modules
+  transform: {},
+
+  // Extensions to consider
+  extensionsToTreatAsEsm: ['.js'],
+
+  // Module name mapper for ES modules
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+
+  // Test match patterns
+  testMatch: [
+    '**/test/**/*.test.js',
+    '**/__tests__/**/*.js',
+  ],
+
+  // Coverage configuration
+  collectCoverageFrom: [
+    'src/**/*.js',
+    '!src/**/*.test.js',
+    '!**/node_modules/**',
+  ],
+
+  // Ignore patterns
+  testPathIgnorePatterns: [
+    '/node_modules/',
+    '/dist/',
+  ],
+
+  // Verbose output
+  verbose: true,
+};

package.json

@@ -8,8 +8,8 @@
     "start": "node index.js",
     "dev": "nodemon index.js",
     "lint": "eslint .",
-    "test": "jest",
-    "test:integration": "jest --config jest.integration.config.js",
+    "test": "NODE_OPTIONS=--experimental-vm-modules jest",
+    "test:integration": "NODE_OPTIONS=--experimental-vm-modules jest --config jest.integration.config.js",
     "db:schema": "psql -h 51.75.24.29 -U postgres -d thetiptop_dev -p 5433 -f database/schema.sql",
     "db:create": "node scripts/create-tables.js",
     "db:seed": "node database/seed.js",
@@ -42,6 +42,7 @@
     "zod": "^4.1.12"
   },
   "devDependencies": {
+    "@eslint/js": "^9.39.0",
     "eslint": "^9.39.0",
     "jest": "^30.2.0",
     "nodemon": "^3.1.10",