Terminal renderer now tracks and repaints stale absolutely-positioned elements that overlap new content
Claude Code's terminal rendering engine gained new internal logic to track absolutely-positioned elements (parts of the interface pinned to a specific spot rather than flowing with the rest of the layout). New helper functions check whether such an element's rectangle stays within its parent's bounds, and detect when a leftover rectangle from a previous frame overlaps a newly drawn element. A new repaintAfterStaleAbsolutePaint method uses this to trigger a repaint when that happens.
This is a rendering correctness fix: it should prevent stale visual artifacts from absolutely-positioned elements lingering on screen and overlapping new content after the layout changes.