Run the Final End-to-End Workflow

Run the complete project from the root.

Then exercise the important paths in the browser:

startup
→ navigate
→ add income
→ add expense
→ edit an entry
→ delete and undo
→ add a category
→ attempt to delete an in-use category
→ move between months
→ inspect Summary
→ refresh the page

Also verify the API still responds after the client build is created.

Checkpoint

The project works as one application, not just as a collection of individually working snippets.