Petr Polezhaev ce03046e51 Fix boundary/child count invariant on shelf and book deletion ...

When deleting a shelf or book, remove the corresponding boundary from
the parent's boundary list so len(boundaries) == len(children) - 1
is maintained. Add API-level tests covering first, middle, and last
child deletion.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-03-09 19:45:55 +03:00

5.7 KiB

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