Sunstone v0.26.0

Added

• OKF v0.2 support. Bundles that declare okf_version in their root index.md
  get spec-aware help in the Frontmatter editor: missing required fields and
  wrongly typed values are flagged, and keys and values are completed. Plain
  folders of markdown only get YAML syntax checks.
• New Bundle… in the launcher and the Bundle switcher creates a Bundle that
  declares okf_version.
• The Bundle root is found more reliably: a declared okf_version wins, then
  the outermost index.md, then the git repository, then the opened folder.
  Right-click a folder and choose Set as Bundle Root to pick it yourself; the
  Explorer header shows the current root.
• A Concept's trust, lifecycle and sources show as one compact pill next to its
  title. Hover it to see who generated and verified the Concept and when, its
  status and whether it is stale, and its sources.
• Dates from the Frontmatter read as relative times ("3 days ago"); hover one
  for the exact date and time.
• status and stale_after: draft, deprecated and stale Concepts are marked
  in the Explorer and the header.
• Authors, generators and verifiers are shown as a person, a process or an
  agent with its version.
• Sources entries show their author, when they were last modified and how
  often they were used, link back to every place in the text that cites them,
  and have an Edit button that jumps to the entry in the Frontmatter. A
  footnote definition for a source is shown in its Sources entry instead of in
  the text.
• Attested Computation Concepts show their contract (runtime, parameters,
  executor, attester) in a card, and their # Computation section is set
  apart.
• After an update, Sunstone shows what's new in the installed version.
• The anonymous web reader uses the same Concept header as the app, with folder
  breadcrumbs.
• Pinned folders in the Explorer have an accent-coloured arrow, and the folder
  of the open index.md is highlighted.

Changed

• Numbered citations ([n]) are deprecated in favour of footnotes that name a
  source id ([^id]). Existing [n] citations still work.

Fixed

• On Linux the interface fell back to the system font instead of Jost.
• Sunstone Web serves configured font files when SUNSTONE_CONFIG is a bare
  file name, and keeps $ characters in configured colours and fonts.
• Footnotes: definitions get unique anchors and always start on their own line,
  and a footnote inside an image's alt text no longer shifts the numbering.
• Links to javascript: or data: URLs in sources and contract cards are no
  longer clickable.