Remember when a key-down belongs to native composition. Consume its
Escape release after composition ends, preserving the active text editor.
Keep ordinary Escape behavior for leaving editing and closing menus.
Add regression coverage for native key ordering and composition markers.
Verify 1,583 frontend tests, lint and changed-file formatting. Check native
Pinyin, Zhuyin and Korean input with eight editable showcase examples.
AI-assisted-by: GPT-6
c229239753