Datasets list — faster loading and setup/last-sync Status column (combined)

The Datasets list now does two things it didn't before: it loads fast, and its Status column tells you how each dataset is really doing.

The list now loads in seconds instead of minutes, even for large accounts with many connected data sources. Each row shows at-a-glance health: a single Status label and an accounts-synced progress bar. The Status column reflects both how a dataset is set up and how its most recent sync actually went, so a dataset no longer reads "Healthy" when its last sync failed, returned no rows, or hasn't run in a while. Each dataset shows one clear outcome — Healthy, Running, Paused, Never run, No data, Degraded, Broken, or Setup error — so you can tell at a glance whether it's genuinely in good shape or needs attention. Where a status needs explanation, such as a sync where some accounts didn't deliver, the detail is available on hover.

You can filter the list by status or provider, group it by status or provider, and it now works on mobile. The list is grouped by status by default. No setup is required — these updates are live for everyone. The Status column focuses on setup and last-sync outcomes; it does not report on data freshness or lateness.