bosie, so far there aren't any guides/helpful messaging or placeholders, so my apologies it's not clear.

the functionality as it stands is, pasting a link and hitting ENTER will add the link.

it needs to be pre-pended with http in order for it to add a link, otherwise it will perform a search.

this will be changed to add a link (http prefixed or not) in any case when there are no search results