* test: reproduce #264 (Sheet metal: collinear tabs cannot be folded or flanged together) * fix(sheet): fold and flange tabs that sit side by side on one line (#264) A fold's bend zone and a flange's setback were cut with an infinite line, so a second tab on the same line blocked a fold ('slanted or curved edge') and two tab-end flanges in one feature shared one trimmed edge (nonmanifold). When the zone falls apart into pieces, fold only the pieces the fold points span, each as its own bend; trim a flange's setback only from the material along its own edge, and attach each flange to the edge it was picked on. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01RjGw4gA5ZvKrU8MQP6sBgT --------- Co-authored-by: bherbruck <[email protected]> Co-authored-by: Claude Opus 5.5 <[email protected]>