- Ctrl+plus / Ctrl+minus / Ctrl+0 (and View menu entries) scale the QSS
FONT_* ladder and the application default font together; the scale is
clamped to 0.8-1.6 and persisted in QSettings appearance/font_scale.
- Resize gutters keep a 5px hover/drag region but paint only a 2px line
with a 1px shadow (hard-stop gradients per orientation).
- WCAG contrast fixes: separators were 1.0-1.2:1 against every theme
background, now >=3.25:1 (dark theme gold @70%); scrollbar handle
1.17:1 -> 3.38:1; unselected tab text on the sky gradient 2.07:1 ->
4.71:1 via TAB_IDLE_TEXT.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>