refactor: migrate undo system from custom stacks to NSUndoManager#599

Merged

datlechin merged 11 commits intomainfrom

refactor/nsundo-manager-migration

Apr 6, 2026

Commits on Apr 6, 2026

refactor: migrate StructureChangeManager from custom undo stack to NSUndoManager
datlechin
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refactor: migrate DataChangeManager from custom undo stack to NSUndoManager
datlechin
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docs: update CHANGELOG for NSUndoManager migration
datlechin
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fix: address review issues in NSUndoManager migration
datlechin
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revert: restore PanelResizeHandle — HorizontalSplitView causes exclusivity crash
datlechin
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docs: remove reverted NSSplitView entry from CHANGELOG
datlechin
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fix: remove groupsByEvent=false — causes registerUndo to silently fail
datlechin
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fix: preserve insertedRowData across undo/redo cycles for row insertions
datlechin
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fix: resolve 8 undo/redo edge-case bugs found in deep review
datlechin
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fix: revert groupsByEvent=false — use default auto-grouping to avoid registration failures
datlechin
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fix: add index shifting for batch row insertion redo, remove dead stub
datlechin
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