test: synchronize narrow notes keyboard acceptance on Linux

The real Linux Host reproduced Escape being sent to the collapsed workbar
trigger after resize. Wait for the narrow viewport, open the workbar through
its existing control, and confirm the append field owns focus before input.

Keep the migration fixture and all IO assertions, with a 15-second allowance
for its 10000-record scenario. Product behavior and approved notes are unchanged.

Validation: real Linux Host full suite 5345 passed, 51 skipped; Windows focused
3 passed; complete typecheck, lint, and release-note verification passed.

docs/quality/recurring-defects.md

@@ -46,6 +46,9 @@ AI 列 280。测试同步原生输入与实际状态后独立复跑通过，保
 2026-09-27 的 0.15.0 主分支 CI 中，会话采集测试向隐藏 Electron 窗口发送 Escape，
 未返回笔记列表。原生键盘辅助函数同样必须显示窗口、取得焦点并等待
 `document.hasFocus()`，再发送输入；不靠跳过 Linux 或关闭沙箱处理。
+随后 Linux CI 与共享 Host 的实测表明窗口焦点并不足够：缩窄窗口会收起工作栏，
+隐藏面板仍有非零宽度，Escape 实际发给工作栏开关。测试须等待响应式状态完成，
+按真实入口重新打开工作栏，并确认目标输入框取得焦点，再测试键盘返回和导航。
 
 ## 整窗遮罩与原生拖动区域