The left rail's File, Assets and Variables icons, the Home, new tab and theme
icons, and each tab's file, live and play marks and the overflow chevron are
drawn at 20 pt instead of 14 or 16; a tab's close cross at 12 pt instead of 10.
The rail's highlights grow to 40 by 36 pt and its items to 68 pt apart; the
rail keeps its 56 pt width, the bar its 40 pt height and the tabs their width.
Assisted-by: Claude Opus 5.5
Assisted-by: Claude Fable 5.1
Assisted-by: GPT-6.1 Sol
Assisted-by: GPT-6 Astra