v0.9.0

Added

• Sortable Patches table. Every column header in the Patches tab is now a
  sort button cycling ascending → descending → off. Sorting covers the full
  result (it happens backend-side over the cached rows, not just the visible
  page); blank cells always sort last, Severity leads with the most urgent, and
  a new manual run returns to the default severity-first order. The web demo
  sorts its sample the same way.

• Persistent error banner. When a query (or a page fetch) fails, the results
  area now keeps a dismissible red banner describing the failure — previously the
  only trace was a toast that auto-dismissed after a few seconds. The banner
  clears on the next successful run.

Changed

• Destructive actions ask for confirmation. Deleting a saved preset and
  Clear stored secret now take two clicks: the first click arms the control
  (it turns red and says so), the second fires it. Moving the pointer away or
  tabbing off disarms.

Fixed

• Update notes formatting. The Update available window now renders the
  changelog as formatted text — section headings, bullet lists, and bold leads —
  instead of showing the raw Markdown source (###, -, **…**) verbatim.