39c4762b74
- Preserved hidden tmux overlays in live viewport while keeping native scrollback intact during forced renders. - Adjusted forced-render handling so pure appends preserve full scrollback and return viewport repaint on equal-size diffs. - Capped streaming edit diff previews to a fixed trailing window and reported hidden hunk counts. - Updated tmux and regression tests to validate hidden overlays, nativeText frame sources, and scrollback retention. - Removed stream preview height tracking and simplified tool call rendering to always invalidate the content box.