🔧 React 19's useOptimistic Fixed My Instant UI. Then Combining It With useActionState Broke My Reset Button

Part 1 was about waiting well. This one is about not waiting at all, and about a couple of mistakes I made along the way that are worth walking through in the open.

If you read Part 1 on useActionState, you already know the shape of the problem it solves: three hand-rolled state variables, a try/catch/finally, and a pending flag you're hoping...