Update ImageGalleryHeader.tsx not to lode photo.user.name if name does not exist in the response

[Bogdastotel]

Updated image gallery header component username to use photo?.user?.id instead of photo?.user?.name (because "name" is currently undefined) leading to header username being 'Unknown user'. With the user.id it loads the username of the photo uploader correctly

🎯 Goal

Updated image gallery header component username to use photo?.user?.id instead of photo?.user?.name (because "name" is currently undefined)

🛠 Implementation details

just added {photo?.user?.name || photo?.user?.id || t('Unknown User')} to load user.id instead of user.name if name does not exist in the photo response

changed image gallery header component

🎨 UI Changes

iOS

Before	After

Android

Before	After

🧪 Testing

☑️ Checklist

• I have signed the Stream CLA (required)
• PR targets the develop branch
• Documentation is updated
• New code is tested in main example apps, including all possible scenarios
  • SampleApp iOS and Android
  • Expo iOS and Android