- enables modifyOtherKeys to get CSI u sequences in terminals that support it
- uses Private Mode 2026 for synced rendering to fix cursor flickering in terminals like iTerm2
- lazy highlighting for code renderables (perf)
- linear scroll acceleration by default
- align textarea default bindings more with readline
- fix vertical cursor movement in textarea
- introduce stdin buffer to handle chunked sequences
- improve capability detection (async)
- renderer emits focus/blur events when app is focused/blurred (if supported by terminal)
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