SeatTrellis v1.8.2

SeatTrellis v1.8.2

User-facing changes

• Added multi-period rotation plans, so teachers can prepare several future
  seating arrangements and review fairness and repeated-neighbour summaries.
• Added local project backup and restore with .seattrellis.zip, a recent
  projects listing, and a privacy scan before sharing a class folder.
• Added an optional pywebview desktop preview that opens the same React
  workbench as the browser command and cleans up its local service on exit.

Engineering and maintenance

• Added the versioned rotation_plan artifact, JSON Schema export, CLI
  commands, and the /api/v1/classes/rotation contract.
• Project bundles reject path traversal and symlink entries, validate their
  manifest before restore, and keep the desktop API behind a per-session local
  bearer token.
• Added Python and browser coverage for rotation plans, project bundles, the
  desktop preview, and the release packaging path.

Upgrade

python -m pip install --upgrade "seattrellis[all]==1.8.2"

SeatTrellis 1.8.2 supports Python 3.11 through 3.14. Existing CLI commands,
project files, the React workbench, the Streamlit compatibility shell, and
Python/Rust backend selection remain compatible.

Known limitations

• The pywebview desktop command is a preview. Signed Windows/macOS installers,
  native file dialogs, and notarization are still planned.
• The React workbench still needs its full history browser and project-package
  controls; the shared CLI and API operations are already available.
• The Rust component remains an optional experimental backend and is not the
  default solver.

Full details in CHANGELOG.