Reserve a slot for tab removal, arm it by long press on touch, and drop Backspace removal

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

C5MAMaggie Appleton and Claude Opus 5.5 authored last month

5ba9720

2 files changed+72-43

StackedSplit

packages/editor/src/styles.css+35 −28

packages/editor/src/widgets/tabs.tsx+37 −15