Check the Complete Application

You have built the board in layers: state, rendering, actions, drag-and-drop, visual drop feedback, and persistence.

This final module treats the application as a finished project instead of a collection of lessons.

You will test the main user journey, check a few failure cases, and then review the code so you understand how the pieces fit together.

By the end of this module

You should be able to:

• verify the complete task workflow
• identify common problems through browser testing
• explain the state → render pattern used by the app
• confirm that the final project behaves correctly after refresh