Refactor: Implement environment variables

Migrate Firebase config to use environment variables for security.

Author: lovable-dev[bot]

src/lib/firebase.ts

@@ -3,17 +3,35 @@ import { initializeApp } from "firebase/app";
 import { getAuth, GoogleAuthProvider } from "firebase/auth";
 import { getFirestore } from "firebase/firestore";
 
+// Vérification que toutes les variables d'environnement Firebase sont définies
+const requiredEnvVars = [
+  'VITE_FIREBASE_API_KEY',
+  'VITE_FIREBASE_AUTH_DOMAIN',
+  'VITE_FIREBASE_PROJECT_ID',
+  'VITE_FIREBASE_STORAGE_BUCKET',
+  'VITE_FIREBASE_MESSAGING_SENDER_ID',
+  'VITE_FIREBASE_APP_ID'
+];
+
+for (const envVar of requiredEnvVars) {
+  if (!import.meta.env[envVar]) {
+    console.error(`❌ Variable d'environnement manquante: ${envVar}`);
+  }
+}
+
 const firebaseConfig = {
-  apiKey: "AIzaSyAlHsC-w7Sx18XKJ6dIcxvqj-AUdqkjqSE",
-  authDomain: "refspring-8c3ac.firebaseapp.com",
-  databaseURL: "https://refspring-8c3ac-default-rtdb.europe-west1.firebasedatabase.app",
-  projectId: "refspring-8c3ac",
-  storageBucket: "refspring-8c3ac.firebasestorage.app",
-  messagingSenderId: "519439687826",
-  appId: "1:519439687826:web:c0644e224f4ca23b57864b",
-  measurementId: "G-QNK35Y7EE4"
+  apiKey: import.meta.env.VITE_FIREBASE_API_KEY,
+  authDomain: import.meta.env.VITE_FIREBASE_AUTH_DOMAIN,
+  databaseURL: import.meta.env.VITE_FIREBASE_DATABASE_URL,
+  projectId: import.meta.env.VITE_FIREBASE_PROJECT_ID,
+  storageBucket: import.meta.env.VITE_FIREBASE_STORAGE_BUCKET,
+  messagingSenderId: import.meta.env.VITE_FIREBASE_MESSAGING_SENDER_ID,
+  appId: import.meta.env.VITE_FIREBASE_APP_ID,
+  measurementId: import.meta.env.VITE_FIREBASE_MEASUREMENT_ID
 };
 
+console.log('🔥 Firebase config chargée depuis les variables d\'environnement');
+
 const app = initializeApp(firebaseConfig);
 
 export const auth = getAuth(app);