fix admin not show all admin users

public/manage_permissions.php

@@ -73,7 +73,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
 }
 
 // Fetch Admins and SuperAdmins
-$stmt = $pdo->query("SELECT * FROM users WHERE role IN ('admin', 'superadmin') ORDER BY role DESC, email ASC");
+$stmt = $pdo->query("SELECT * FROM users WHERE LOWER(TRIM(role)) IN ('admin', 'superadmin') ORDER BY role DESC, email ASC");
 $admins = $stmt->fetchAll(PDO::FETCH_ASSOC);
 
 // Fetch All Users for Dropdown