Knowledge Explorer Step 5: A Working Search Form

Make the search bar genuinely work as a form. Typing updates state, submitting captures the query, and pressing Enter in the field does the same thing as clicking the button. Show the submitted query above the empty results area. Then test it entirely from the keyboard, tabbing to the field, typing, and pressing Enter without touching the mouse once. If any part of that does not work, fix it now: it is far cheaper than discovering it in module 14.