Connect the Real Exchange-Rate Sources

Now the project moves from local fallback data to real network data. You will add the current-rate request, expose its result to the page, and connect the historical chart to Frankfurter’s v2 reference-rate endpoint.

This module also introduces the loading and failure paths that make the UI honest about external data.

Checkpoint

Open the project, identify the files named in this module, and confirm the starter still runs before making the first change.