Fix task display issue for directors on initial page load

Update task fetching logic to correctly enable data retrieval for 'directeur' role users, resolving an issue where tasks were not displayed until a page refresh.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 9fcf4b21-eb0c-4e53-a567-e2ce4a6ad869
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/9fcf4b21-eb0c-4e53-a567-e2ce4a6ad869/yiEpJFx

client/src/pages/Tasks.tsx

@@ -384,7 +384,7 @@ export default function Tasks() {
         throw error;
       }
     },
-    enabled: !!user && (user.role !== 'admin' || storeInitialized),
+    enabled: !!user && (user.role === 'admin' || user.role === 'directeur' ? storeInitialized : true),
   });
 
   // Fetch users for task assignment - seulement pour admin/manager/directeur