fix(workbar): keep scroll arrows clear of tab close buttons

Reserve space on both sides of the tab viewport for overflow arrows so they cannot cover tab close controls. Keep that space while arrows are hidden or disabled to avoid layout shifts. Add Electron coverage for arrow bounds and native closing at the right viewport edge; update tab layout documentation. Validation: 19 focused tests passed; typecheck and lint passed. Full suite did not complete before interruption and reported failures in supervisor settings and supervisor layout tests. Release note: Fix workbar scroll arrows covering tab close buttons when many tabs are open.
2026-10-04 01:14:41 +08:00
parent 59d36c2258
commit 29a134b804
4 changed files with 22 additions and 14 deletions
@@ -371,7 +371,7 @@
 - 已打开实例保留 `tablist`、`tab`、`tabpanel`、方向键、Home、End 和焦点恢复语义。
  实例过多时 Tab 区单行横向滚动，“+”保持可见，不换行或改成下拉框。不可关闭实例不渲染
  关闭按钮，也不响应关闭快捷命令。
-  “+”位于滚动容器外并占用固定宽度；滚动箭头限定在剩余的页签区域内，不能覆盖添加入口。
+  “+”位于滚动容器外并占用固定宽度；溢出时左右滚动箭头在滚动视口两侧各占独立宽度，不能覆盖页签、关闭按钮或添加入口。箭头隐藏或禁用时保留占位，避免悬停或滚动引起布局跳动。
 - 当前工作栏 Tab 必须同时使用连续内容表面、可见边框、顶部指示、图标或较高字重中的至少
  两种信号；悬停反馈不得强于当前选中态。Tab 关闭按钮保留固定布局空间，默认仅在对应 Tab 悬停或
  `focus-within` 时显示；无悬停或粗指针设备始终显示，键盘与辅助技术始终可访问。