[sunxiuguo]

Summary

Fix lost or displaced annotations/hyperlinks after cropping a rotated page. Annotation /Rect coordinates are defined in the original page's coordinate system, so rotation must use root_page.width / root_page.height, rather than the cropped page dimensions.

A synthetic 300×400 page with a URI link at [50,100,150,130] illustrates the problem: page.crop(page.hyperlinks[0]'s bbox).hyperlinks is empty at 90°, 180°, and 270°. The uncropped hyperlink coordinates are correct. This also reproduces in PyPI 0.11.10.

Changes

• Use root-page dimensions for annotation rotation (one production line).
• Add 16 synthetic-PDF regression cases: four rotations × four rectangle endpoint orderings, with crop, nested crop, within-bbox and outside-bbox assertions.
• Update the changelog and contributor list as requested by CONTRIBUTING.md.

Validation

Against develop 2fcbe6a6264201e9ae3e661c01c39b4111eb9af0, Python 3.12:

• New regressions before the fix: 12 failed, 4 passed.
• New regressions after the fix: 16 passed.
• Complete pytest suite: 189 passed.
• make lint: flake8, strict mypy (20 source files), Black and isort all passed with the repository's pinned tooling/type stubs.
• Independent review: 224 additional geometry checks passed, including partial clipping, relative/nested crops and inclusion/exclusion behavior.

All fixtures are synthetic and contain no external/customer data. Uncropped pages retain existing behavior because root_page is the page itself. Remote CI has not yet run. This contribution was prepared with AI assistance and independently reviewed and tested.