This version addresses the review feedback on the previous submission:
Package contents: the archive now contains only the add-on files
(Python modules and the manifest). Bundled documentation and images were
removed; the in-panel help button opens the online documentation instead.
Code organization: the single-file implementation was refactored into
focused modules (diff engine, stack management, properties, operators, UI,
application handlers, i18n) using relative imports. All code comments and
docstrings are now in English.
Removed the legacy bl_info block and the __main__ guard.
No functional changes — behavior is identical to the previous submission.
Verified with 119 automated headless tests on Blender 5.1.1.