The <select> element survives settings open/close, so its lingering value
masked the otherwise-empty restore path on the second open and the
dropdown always reverted to whatever was last picked in the *current*
session. Track the active preset in localStorage on every change /
save, restore from localStorage first (it's the source of truth), and
clear the entry on delete.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>