committed 10:04PM - 07 Jul 26 UTC
DataViewer.vue never inspected the `error` returned by useFetch, so any
failed /…api/values request (auth misconfiguration, upstream provider
error, etc.) left the view indistinguishable from "no query run yet",
showing the generic "select parameters and stations" hint with no
indication anything went wrong. The error message is now shown inline
and as a toast.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>