List the app store catalog as seen by a specific user — the apps visible in their app store, mirroring the end-user experience rather than the admin app management view.

Returned items include the same fields as GET /v1/apps, except for admin-only fields (workflow bindings, post_approval_message, admins, custom_attributes). appstore_settings is always included here, rather than requiring expand.

target_user_uuid defaults to the caller; viewing another user's catalog requires READ_APP_STORE_ITEMS.