v1.0.0

Added

• Results rows link to the Metadata Management app when it is
  installed and the user may open it, falling back to Maintenance
  otherwise. Metadata Management is installable from the App Hub on
  2.41 and 2.42, and bundled from 2.43, so which app to use is resolved
  at runtime from apps/menu, which lists only apps the user may open
  and reports each app's launch URL. When the user has neither app the
  link is omitted rather than offering a dead end.
• Unused program rule variables link out for editing too; previously
  only invalid expressions did. The link button is labelled "Edit", with
  the app it opens named in its tooltip.

Fixed

• Transient server failures are no longer reported as invalid expressions.
  A 5xx, a rate-limit response or a dropped connection used to produce a
  generic "Condition validation error" row, indistinguishable from a real
  problem with the rule. Such requests are now retried with a short
  backoff, and anything still unanswered is counted and surfaced as a
  run-level warning instead of being listed as invalid.
• The expression-description requests now send the X-Requested-With and
  Accept headers that the data engine sends on every other request, so
  an expired session can no longer trigger the browser's native
  basic-auth dialog.
• The expression-description requests now use the same API version as the
  rest of the app (the engine defaults it to the server's own version)
  rather than always hitting the unversioned /api/ path.
• Results from the last completed run stay on screen when a subsequent
  run is cancelled or fails, instead of being discarded.
• Selection checkboxes in the unused-variables table have accessible
  names, and the link-out button shows that it opens a new tab.
• The program pickers always offer a search box, matching the original
  tool, rather than only above ten programs.

Changed

• Migrated to the DHIS2 App Platform. The app is now a React +
  TypeScript application built with @dhis2/cli-app-scripts, using
  @dhis2/app-runtime for data access and @dhis2/ui for all UI
  components. The custom webpack setup, materialize-css, choices.js,
  the hand-rolled d2api.js fetch layer and the legacy header-bar
  loader are all gone; the platform shell now provides the header bar,
  login handling and manifest generation.
• Program lists and results tables use @dhis2/ui components
  (MultiSelectField, DataTable, TabBar, Modal, NoticeBox,
  LinearLoader), so the app follows the DHIS2 design system.
• All user-facing strings go through @dhis2/d2-i18n and are
  extractable for translation.
• Validation logic (expression validation via the description
  endpoints, unused-variable detection incl. d2:hasValue and
  string-literal stripping, concurrency limits, cancellation) is ported
  unchanged and now covered by unit tests (pnpm test).
• Result tabs show counts, the unused-variables filter only offers
  validated programs, and selections are pruned when the filter
  changes.
• CI workflow builds with pnpm + d2-app-scripts and attaches
  build/bundle/tool-pr-validator-<version>.zip to releases.
• minDHIS2Version is 2.40.

Removed

• webpack.config.js, d2auth.json handling, manifest.webapp
  generation via d2-manifest, src/js/*, Materialize CSS/JS and the
  bundled legacy DHIS2 header bar.
• The Python Playwright scripts under tests/playwright/ (written for
  the old DOM); functional testing is now done against the platform UI.