Knowledge Explorer Step 14: The Keyboard Pass

Go through the whole application without touching the mouse. Tab from the top: reach the search field, type, submit with Enter, move into the results, open one with Enter, and get back. Fix everything that fails. Then add a polite live region that announces the result count when a search completes, and role="alert" on the error. Confirm the focus ring is visible at every single step, because a focus indicator you removed for looking untidy is the one thing keyboard users navigate by.