Same Esc fall-through class: the menu's Esc handler was bubble-phase and
didn't stop the keystroke, so the slideover capture handler fired first and
popped the discard prompt while the menu also hid. Capture + stopPropagation,
gated on the menu being visible; registered before the slideover handler
(installCustomContextMenu runs at the top of init) so ordering is guaranteed.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
r-zakarya
51f72e560a