Trizbort v2.3.0-beta.1

This is a beta prerelease for testing, based on the regression-coverage changes in #17.
The stable release remains v2.2.0. Extract the beta into a separate writable folder and test
with copies of your maps; keep backups of maps and appsettings.json.

Change

• Expanded regression coverage across editing, persistence, Automap, exporters and rendering, including round-trip checks for all 112 manual map fixtures.
• Refactored editing, dialog/clipboard interactions and PDF export orchestration to make production behavior testable.

Fix

• Corrected defects exposed by regression tests in map loading and metadata preservation, empty-map statistics, editing geometry, pasted room references, exporter reuse and zero-extent PDF export.
• Improved Automap end-of-file, cancellation and replacement-session handling.
• Corrected Canvas tooltip positioning and backup message text.

Beta testing

• Open, edit, save and reopen copies of existing maps; check names, descriptions, regions, labels, curves and nested objects.
• Exercise selection, dragging, zoom, copy/paste and dialogs, including Cancel and error paths.
• Test Automap transcripts and stopping/restarting Automap.
• Check image/PDF exports and compile generated source in your IF engine.
• Check font/layout appearance at your usual DPI and with multiple monitors, plus minimap and desktop clipboard behavior.
• Report problems at https://github.com/leeoades/trizbort/issues with the beta version, reproduction steps and a minimal map or transcript where possible.

Full Changelog: v2.2.0...v2.3.0-beta.1