Preserve full terminal-grid width with horizontal scrolling in tool panes. Keep hidden command control changes from unpinning the viewport, and re-pin scrolling at the live edge in normal and inverted layouts.
Validation: formatting, test-layout checks, both presubmit Clippy commands, and 141 relevant tests passed. Ten other terminal-view tests failed identically on the untouched baseline (keyboard, cloud-agent, input status, and footer behavior).
rkw6086
2d581f4c01