Knowledge Explorer Step 7: Every State Designed

Before any real request exists, build all four states and a temporary set of buttons that switch between them. Design each one properly: a loading message that does not shift the layout when it is replaced, an error with a retry button, an empty state that suggests trying a different word, and the results list. Keep the switcher until module 9 is finished. Being able to see the error state on demand is the only reason anyone ever designs it well.