TEST-ONLY: set the module-level showHealthyPulp flag directly, without the
DOM/all-teeth side effects setHealthyPulpVisible performs (button toggle
state, re-rendering every tooth in ALL_TEETH) — needed so __renderActiveLayers
callers can exercise both the "healthy pulp shown" and "hidden" render paths
in isolation. Not part of the public API.
TEST-ONLY: set the module-level
showHealthyPulpflag directly, without the DOM/all-teeth side effectssetHealthyPulpVisibleperforms (button toggle state, re-rendering every tooth inALL_TEETH) — needed so__renderActiveLayerscallers can exercise both the "healthy pulp shown" and "hidden" render paths in isolation. Not part of the public API.