Handle Forecast Data Safely

Task

Make forecast rendering resilient to an empty or unexpected list.

File / section

src/components/Forecast.jsx

Change

Before grouping, guard the list: if (!data?.list?.length) return null;. Keep the five-day slice and existing card mapping.

Why this change matters

The component should fail quietly rather than throw when a forecast response has no entries.

Test it

Temporarily inspect the component logic with the browser console and confirm normal data still renders.

Checkpoint

The forecast component has a safe empty-data boundary.