Add default admin user creation for new installations

Creates an admin user with default credentials ('admin'/'admin') if one does not exist upon server startup, ensuring initial access for new deployments.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/COxOmlM

server/index.ts

@@ -4,6 +4,7 @@ import passport from "./auth";
 import { registerRoutes } from "./routes";
 import { setupVite, serveStatic, log } from "./vite";
 import { schedulerService } from "./services/scheduler";
+import { ensureAdminUserExists } from "./init-admin";
 
 const app = express();
 
@@ -98,9 +99,12 @@ app.use((req, res, next) => {
     port,
     host: "0.0.0.0",
     reusePort: true,
-  }, () => {
+  }, async () => {
     log(`serving on port ${port}`);
     
+    // Initialiser l'utilisateur admin par défaut
+    await ensureAdminUserExists();
+    
     // Démarrer le scheduler pour les publications programmées
     schedulerService.start();
   });