- Rewrite stop() to use viewport-relative cursor positioning instead of
content-length, preventing blank gaps when content is shorter than viewport
- Replace trailing \r\n\x1b[2K clear loops in repaintViewport() and
height-increase path with \r\n\x1b[J to avoid cursor drift past content
- Add 12 TUI regression tests for exit gaps, content shrink, and overlay
dismiss cursor recovery
- Add 6 coding-agent controller tests for /new and /tree commands
Vu Anh Nguyen