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* test: reproduce #263 (sheet.fold accepts a fixed point that is not on the sheet) * fix(sheet): refuse a fold's fixed point that lies off the sheet's material (#263) A fixed point inside a cut-out or outside the base outline (in the panel's thickness) silently picked a side. Refuse it with an error that names the point; side-face picks and points on other panels keep working. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01RjGw4gA5ZvKrU8MQP6sBgT --------- Co-authored-by: bherbruck <brennen.herbruck@gmail.com> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>