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* Split: keep only the resources each part draws (#204) In a book whose pages share one resource dictionary, every split part carried every XObject the source listed: a part saved out at the source's size although its pages drew a fraction of the images. extract_pages now walks each part's content (form XObjects included) and drops the /XObject entries no page names; the garbage-collecting rewrite on save then drops the objects themselves. Tests cover a one-page part that must lose the other page's image and a part that needs both. * Split/Extract pruning never drops an XObject something might still draw A resources dictionary is left untouched when one of its pages has content that can't be decoded, when a form nests past the depth limit, or when it lists a Type 3 font without its own /Resources (its glyphs draw through the page's). Regression tests fail without this. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Mohammed Munzir <Mohammed.Munzir@iga.gov.bh> Co-authored-by: Brandon Thomas <echelon@gmail.com> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>