v9.63 2026-06-19 WeKan ® release

This release adds the following features:

• Fix the wekan.fi install page version never updating from a stale value.
  The release-all.yml website job ran every release but the install page's
  version stayed frozen at v9.57: releases/release-website.sh updated it with a
  sed anchored on >v$OLD</span>, which silently no-op'd once the published
  page's value no longer matched the old_version passed for a release. Anchor
  on the stable <span class="version-number"> instead and re-normalize whatever
  version is there to the new one, with an assert so a miss fails loudly. Same
  self-healing fix applied to the local-flow copy in releases/version.sh. The
  live wekan.fi install page was also corrected to the current version.
  Thanks to xet7 and Claude.

• Make the remaining release version substitutions self-healing.
  Hardened the last $OLD_VERSION-anchored seds in releases/version.sh — the
  same fragile pattern that froze the Docker ARG VERSION and the install page.
  The snapcraft.yaml bundle download was release-critical (same class as the
  Docker bug: the snap downloads wekan-<v>-<arch>.zip, so a stale value ships
  the wrong bundle under the right name) and was stuck at v9.57; it now anchors
  on the wekan-<v>- / releases/download/v<v>/ shapes and asserts. The
  sandstorm appVersion rewrite is now global and self-healing (the redundant
  $OLD_NO_DOTS-anchored fixup is dropped), and the Windows Offline.md doc links
  self-heal with a soft warning (cosmetic, so they must not fail the release).
  snapcraft.yaml and Offline.md were also corrected from their stale v9.57.
  Thanks to xet7 and Claude.

Thanks to above GitHub users for their contributions and translators for their translations.