Before/After and Peek Flat are now mutually exclusive both ways: enabling Before/After clears an active Peek Flat, so its toggle can't linger lit while the compare baseline is what's on screen (previously only the flat→compare direction was handled).
Before/After and Peek Flat now persist across rotate/flip. Geometry ops re-render within the active comparison view (new AppController.rerender_active_view) using the rotated/flipped baseline or flat-master config, instead of dropping back to the plain edit. Only leaving the canvas exits the view.
Before/After and Peek Flat are now mutually exclusive both ways: enabling Before/After clears an active Peek Flat, so its toggle can't linger lit while the compare baseline is what's on screen (previously only the flat→compare direction was handled).
Before/After and Peek Flat now persist across rotate/flip. Geometry ops re-render within the active comparison view (new AppController.rerender_active_view) using the rotated/flipped baseline or flat-master config, instead of dropping back to the plain edit. Only leaving the canvas exits the view.