Refactor: Simplify event handling in FlyerUploader tests and enhance form submission in ProfileManager for improved clarity and robustness

src/pages/admin/components/ProfileManager.tsx

@@ -372,7 +372,7 @@ export const ProfileManager: React.FC<ProfileManagerProps> = ({ isOpen, onClose,
                     </div>
 
                     {activeTab === 'profile' && (
-                        <form onSubmit={handleProfileSave} className="space-y-4">
+                        <form data-testid="profile-form" onSubmit={handleProfileSave} className="space-y-4">
                             <div>
                                 <label htmlFor="fullName" className="block text-sm font-medium text-gray-700 dark:text-gray-300">Full Name</label>
                                 <input id="fullName" type="text" value={fullName} onChange={e => setFullName(e.target.value)} className="mt-1 block w-full px-3 py-2 bg-white dark:bg-gray-700 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm" />