Tabs were being applied to internal cutouts and circle holes, which is
incorrect — only the external perimeter should be tabbed. Restructured
the Tabs panel to use radio buttons ("Tab all parts" vs "Auto-tab by
smallest dimension") so the two modes are clearly mutually exclusive
instead of the confusing implicit override behavior.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>