FIX: drop(index=[pd.NA]) fails for Arrow-backed index (#63304)#63933

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dedlYTiTAN wants to merge 19 commits intopandas-dev:mainfrom

dedlYTiTAN:fix-gh63304-v3

Commits on Jan 28, 2026

FIX: drop(index=[pd.NA]) fails for Arrow-backed index (#63304)
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TST: Skip Arrow drop test if pyarrow < 13.0.0
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STY: linting fixes (isort, whitespace) for #63304 test
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STY: Apply ruff format to test_gh63304.py
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FIX: restrict null-casting in isin to explicit pd.NA (fix regression)
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STY: apply ruff fixes to arrow/array.py
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REF: replace lib.missing.NA with isna() to fix mypy error
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FIX: explicitly raise TypeError for invalid null types in isin to force Parser fallback
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Commits on Jan 29, 2026

FIX: restore legacy passthrough for non-pd.NA nulls in isin
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STY: apply ruff formatting fixes (fix line length)
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STY: manually fix line length (ruff E501)
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STY: aggressive comment wrapping for ruff length compliance
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REF: use is_pdna_or_none to avoid circular import and fix CoW regression
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FIX: restore missing isna import
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STY: run isort on array.py to fix import order
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REF: localize isna imports to prevent circular dependency for CoW
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FIX: resolve remaining isna undefined names by analyzing ruff output
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FIX: resolve final isna undefined names in contains and take
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STY: run isort to fix pre-commit check
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