fix: support patchwork >= 1.3 in build_patchwork()

[mengxu98]

build_patchwork() is a fork of patchwork's assembly. patchwork 1.3 moved the pieces into x$patches (with one plot held by the object itself) and changed the internals, so the function failed with object of type 'environment' is not subsettable.

The fork now follows the current internals (collected axes and axis titles, guide position, panel-area, background z-order) and normalises the input through patchwork's own get_patches(), so both patchwork objects and patches lists work. The table geometry arguments are set by patchwork itself and now warn instead of building an invalid table.

Verified against patchwork 1.3.2: the assembled gtable is identical to patchwork::patchworkGrob() (same dimensions, cells, grob names and sizes), and patchwork_grob(), as_gtable(), as_grob() and panel_fix() all work. Adds tests/test-build-patchwork.R.

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-10T10:14:53.069471Z	6fe905d	PR opened

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