Workit v1.1.50

fix: 滚动条Ghost样式 — 消除视觉边界不对称

- 默认透明不可见，hover容器时淡入
- 宽度缩至3px，更圆角(3px)
- hover/active/focus-within逐级显现
- Firefox同步设为transparent

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>