Provide a permanently open search bar on desktop like in the mobile app
Opening the search bar first by clicking the magnifier is a rather unnessessary step before proceeding a search. A permanently visible input field is a very strong driver to take use of search more often and lowers the hurdle.
I fully agree with Oliver! At least it should be a configurable option in settings whether or not to permanently show an enlarged input field.
Either the size it has after clicking the magnifier icon (shrinking areas to the left back to an icon) or autosizing the input field without shrinking to iconic display.