chore(deps): bump pymupdf from 1.25.3 to 1.28.0 in /backend

[dependabot]

Bumps pymupdf from 1.25.3 to 1.28.0.

Release notes

Sourced from pymupdf's releases.

PyMuPDF-1.27.2.3 released

Wheels for Windows, Linux and MacOS, and the sdist, are available on https://pypi.org and can be installed in the usual way, for example:

python -m pip install --upgrade pymupdf

Changes in version 1.27.2.3

• Fixed issues:

  • Fixed #4928
  • Fixed #4942
  • Fixed #4954
  • Fixed #4958

• Other:

  • Fixed incorrect generation of lineJoin j in PDF content, introduced in 1.27.2.2.
  • Allow build to (incorrectly) claim to be thread-safe, for #4760. See setup.py for details.
  • Use pypi.org's pipcl package instead of our own pipcl.py file.

PyMuPDF-1.27.2.2 released

Wheels for Windows, Linux and MacOS, and the sdist, are available on https://pypi.org and can be installed in the usual way, for example:

python -m pip install --upgrade pymupdf

Changes in version 1.27.2.2

• Fixed issues:

  • Fixed #4902
  • Fixed #4932

• Other:

  • Added Annot.__bool__().

PyMuPDF-1.27.2 released

Wheels for Windows, Linux and MacOS, and the sdist, are available on https://pypi.org and can be installed in the usual way, for example:

python -m pip install --upgrade pymupdf

Changes in version 1.27.2

... (truncated)

Changelog

Sourced from pymupdf's changelog.

Change Log

Fixed issues:

• Fixed 4670 <https://github.com/pymupdf/PyMuPDF/issues/4670>_: scrub fails to remove hidden text after clean_contents stopped including line breaks (\u2265 1.24.0)
• Fixed 4943 <https://github.com/pymupdf/PyMuPDF/issues/4943>_: enh: applying redactions with image cropping for currently unsupported colorspaces
• Fixed 5030 <https://github.com/pymupdf/PyMuPDF/issues/5030>_: find_tables() with layout enabled can return a zero-cell Table, and Table.bbox then raises "ValueError: min() iterable argument is empty"
• Fixed 5044 <https://github.com/pymupdf/PyMuPDF/issues/5044>_: Outline (TOC) parsing bug
• Fixed 5049 <https://github.com/pymupdf/PyMuPDF/issues/5049>_: font subsetting segfaults in 1.28.0, regression from 1.27.2.2 #5049
• Fixed 5042 <https://github.com/pymupdf/PyMuPDF/issues/5042>_: Page.get_texttrace() leaks None references \u2014 Fatal Python error (none_dealloc) in long-running processes (1.27.2.3 & 1.28.0)

Other:

• Output warning when legacy fitz module is imported.
• Cope better with markdown containing illegal utf8 sequences.
• Fixed building with PYMUPDF_SETUP_MUPDF_VS_UPGRADE.
• pymupdf.Page.find_tables():
  • new args use_layout: bool = True union: bool = False refine: bool = False.
  • Improved speed.

Changes in version 1.28.0 (2026-06-29)

Fixed issues:

• Fixed 4114 <https://github.com/pymupdf/PyMuPDF/issues/4114>_: ComboBox choice_values full of empty strings despite PDF having valid choices.
• Fixed 4950 <https://github.com/pymupdf/PyMuPDF/issues/4950>_: remove_rotation() raises ValueError on widgets with empty/infinite rects
• Fixed 5001 <https://github.com/pymupdf/PyMuPDF/issues/5001>_: Formulae incorrectly rendered as black boxes
• Fixed 5033 <https://github.com/pymupdf/PyMuPDF/issues/5033>_: Annot.set_rotation(0) followed by Annot.update() throws AttributeError

Other:

• Use MuPDF-1.28.0.
• pymupdf.Document.init(): new arg archive to support documents with archives.
• pymupdf.Document.convert_to_pdf(): also generate links.
• Fixed MacOS x64 platform tag - used to be macosx_10_9_x86_64, but we actually require MacOS 10.15, so platform tag is now macosx_10_15_x86_64.
• Support Windows builds with free thread python.
• pymupdf.Document.save() now saves non-PDF documents in PDF format.
• New method pymupdf.Document.apply_css().
• Pyodide wheel is available on pypi.org.

Changes in version 1.27.2.3 (2026-04-24)

• Fixed issues:

... (truncated)

Commits

• e9cdfc9 changes.txt: fix mupdf version number.
• 629a358 docs/document.rst: add new in 1.28.0 to init's archive.
• 7264f27 README.md: updated example conversion from md to pdf.
• 119a0bc docs/document.rst: document that save() now also works for non-pdf documents.
• 5ebfc4c setup.py: use mupdf-1.28.0.
• 14d8fac changes.txt: removed bogus #4423 entry, added #5033.
• d961616 tests/test_annots.py: added test_5033() for setRect() vs set_rect() bug.
• d91bd63 changes.txt: added note about save() and non-pdf documents.
• fd409de .github/workflows/: updated to use mupdf branch 1.28.x.
• 04aa7dd Remove old setRect Name
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