khanalayush619/todo-app — reverse-engineered prompt

Build me a simple, clean todo app in JavaScript that feels polished and easy to use.

I want a page where I can add a task, see my list, mark tasks as done, edit them if I made a mistake, and delete them when I no longer need them. Completed tasks should look clearly different from active ones. Please make sure the list is saved so it does not disappear when I refresh the page.

Keep the design minimal and friendly, with a layout that works well on both desktop and mobile. If it makes sense, add small quality of life touches like showing an empty state when there are no tasks yet and preventing blank tasks from being added.

Please set it up so I can open it and use it easily, and add a short README with simple run instructions. If anything is unclear, use sensible defaults and look up current docs online if you need to.