refactor(admin): move back button and action to a flex container on the right side of AdminHeader

src/features/admin/components/AdminHeader.js

@@ -9,11 +9,6 @@ const AdminHeader = ({ title, description, backHref, backLabel = '← Retour', a
   return (
     <div className="flex items-center justify-between">
       <div className="flex items-center gap-3">
-        {backHref && (
-          <Button variant="secondary" size="sm" onClick={() => router.push(backHref)}>
-            {backLabel}
-          </Button>
-        )}
         <div>
           <h1 className="text-lg sm:text-xl font-semibold text-neutral-900 dark:text-white">{title}</h1>
           {description && (
@@ -21,8 +16,15 @@ const AdminHeader = ({ title, description, backHref, backLabel = '← Retour', a
           )}
         </div>
       </div>
+      <div className='flex gap-2'>
+        {backHref && (
+          <Button variant="secondary" size="sm" onClick={() => router.push(backHref)}>
+            {backLabel}
+          </Button>
+        )}
         {action}
       </div>
+    </div>
   );
 };